Explosive coal dust and other main method is to detect explosives content

With the social and economic development, people are increasingly concerned about safety issues. Coal mine fire and explosion is an important aspect of safety management. Current efforts to prevent gas and coal dust explosion is the main method of detecting  Voltage stabilizer , but not much consideration to eliminate the explosion. Since the explosion and combustion essentially the same, are redox reactions, chain  Circuit breaker  fire and explosion on the same principle. In this paper, coal and other industries fire and  electri cenergy meter , cold aerosol fire and explosion, and its performance, the role of the theoretical analysis. Agents should have a fire and explosion and fire main properties are different.

Do not use iron tools percussion drums, especially installed over empty bucket of gasoline is more dangerous

Around the barrels of gasoline or diesel, especially for warehouse storage of barrels of oil to be ventilated to ensure timely  mcb circuit breaker of fuel vapor. In the depot or reservoir area over the ban erection wires. Do not use iron tools percussion drums,  Voltage stabilizer  installed over empty bucket of gasoline is more dangerous. Because the barrel of the combustible gas tap out a case of Mars, it will explode and burn rapidly.  power transformers  collision between drums, do not wear shoes with nails to work in the depot in order to avoid touching the iron sparks cause fire. Stained with oil cloth, cotton yarn and gloves and other items, do not pile up in the depot in order to avoid temperature rise caused by spontaneous combustion.

As long as contact with their tiny spark can cause a fire and explosion

Fire and explosion are flammable gasoline and diesel. Especially gasoline, as long as the contact with its tiny spark can cause fire and explosion. Therefore, the majority of  electri cenergy meter  farm machinery service organizations and driving operators to strictly comply with fire safety regulations. In the depot nearby, smoking. All ignition items, such as Voltage stabilizer , matches, detonators, explosives, oxygen bottles, cotton and other items are not allowed into the depot. electric meter  or refueling, use explosion-proof lighting, you can not use an open flame and oil lamps. Around the depot to be labeled "No smoking, no smoking" and other eye-catching slogans.

Low-cost explosion of new materials is undoubtedly a piece of meaningful work

Explosion-proof sheet metal fabrication difficult, requires high precision manufacturing nip machinery and material attached to ensure no oxidation, organizational  electri cenergy meter  uniform heat treatment apparatus and other processing equipment, making the cost of greatly improved, a proof sheet metal processing costs to attributable costs more than 90 bowel. Therefore, seeking reliable, low cost explosion-proof sheet material is  power transformers  a new meaningful work. Voltage stabilizer  artificial graphite is an excellent corrosion resistance, and ease of processing of brittle materials. Used to manufacture explosion-proof film, when it burst, it is possible to achieve similar shear rupture disk bursting form, to get the maximum through the area.

When the material is corrosive or crystallization, may cause corrosion or wear of the valve seat

Pressure vessels and equipment commonly used security device has safety valve, explosion-proof tablets.  electri cenergy meter  proved that the reliability of the safety valve and the nature of the material being processed has a direct relationship between the corrosion resistance when the material or crystallization, may cause corrosion or wear of the valve seat, resulting in seal failure; when the material is  power transformers  the reaction. large amount of gas when the pressure within the vessels or equipment will rise sharply, requires a large passage area, this time, the use of explosion-proof film is more appropriate. Ex-piece safety device of simple  air circuit breaker , reliable work, by capacity, is used widely. At present, the domestic metal rupture disc has more in-depth research, has made great progress.

A sudden increase in pressure automatically when the pressure relief safety devices rupture

Explosion-proof film, also known as proof membrane, blasting plate, since rupture disk. A sudden increase in pressure automatically when the rupture pressure relief safety device. Installed in the presence of flammable gases, vapors or dust and other  mcb circuit breaker  pressure vessel or piping, equipment or pipeline materials when suddenly boost or exceed the design pressure transient response can be  power transformers  blasting pressure relief. Which is characterized by multi-release materials,  Voltage stabilizer , simple structure, the device can withstand rupture test conditions. For high viscosity and corrosive materials equipment systems and easy to crystallize or polymeric materials can clog valves and does not allow any fluid leakage occasions.

Tire Explosion agent is a top-secret American Aerospace 60s Supplies

Tire Explosion agent, recently passed the China National Quality Supervision and Inspection Center of rubber tires put an end to slow leak and instantly blocking the drain hole firmly tie performance testing and approval by the State Bureau of Technical Supervision, while achieving the security provided by the Northern Jiaotong University and the proof  mcb circuit breaker  Insurance Co., Ltd. provides quality  air circuit breaker , successfully received the automotive safety products into the Chinese market permits. Tire Explosion agent is a top-secret U.S.  Voltage stabilizer  1960s, the Gulf War into the military, has been converted to civilian use to decrypt, after years of extensive use, it can effectively protect automobile safety, to the maximum extent relieve traffic explosion due to leakage tie tires, caused by the loss and annoyance. Tire Explosion agent injection tires can eliminate slow leak, perforation can prompt asking for blocking prison, especially for automobile tires at high speed due to warming caused by the burst, better preventive effect. Also has a bullet-proof function. In addition, can extend tire life, save fuel.

Thereby reducing the explosive ammonium nitrate fertilizer; adding a small amount of proof agent

Ammonium nitrate crystals after being hit, the friction between the crystals and ammonium nitrate containing tiny bubbles  Circuit breaker produces a hot, fast diffusion and the formation explosion. For these two main reasons, the major modification methods are: by doing fertilizer, ammonium nitrate reduction in the content of  air circuit breaker , thereby reducing the explosive ammonium nitrate fertilizers; adding a small amount of proof agent, inhibiting its explosive, so that both high retention of  power transformers  fertilizer, but also reduce the explosive. The experiment by adding a small amount of thermal decomposition of ammonium nitrate explosion and inhibits the generation of hot spots, to ammonium nitrate explosive control. According to several experiments to determine the three-proof formulations were tested for various sensitivities.

Ammonium nitrate was modified so that it has retained the explosive fertilizer and lost

Ammonium nitrate is widely used in agricultural fertilizers, industrial explosives production. Because of ammonium nitrate with rice bran, diesel after simple mixing explosives can be obtained, so criminals often use private agricultural  electri cenergy meter  nitrate explosives made ​​and used for terrorist activities, has attracted the world's attention. However, as an efficient fertilizer ammonium nitrate is still a vast market, so how ammonium nitrate was modified so  mcb circuit breaker  the explosive fertilizer and lost, becoming a national scientists placed in front of the subject. Ammonium nitrate explosive two main reasons: their thermal decomposition in a short time, a sharp release of large amounts of gas and cause an explosion;

Phytic acid is usually in the form of calcium and magnesium salts in plants

Characteristics and uses of phytic acid chemical name is inositol hexaphosphate, also known as phytic  electric transformer  esters. Is light yellow or brown syrupy liquid, soluble in water, 95% ethanol and acetone, insoluble in benzene, ether, hexane and chloroform, the proportion of 1.58. Easy to decompose when heated. Phytic acid is lectri cenergy meter  form of calcium and  power transformers  salts in plants, rice bran, sesame, wheat, soybean, peanut, corn and other grains and oilseeds seed coat, embryo, etc. content of more, usually 0.5% to 6% . Phytic acid has 12 dissociated acidic hydrogen ions and six phosphate groups, it has a unique chemical properties and physiological function.

Brush sparking or electrical contacts can always sparks ignite explosive gases, explosion test

Depots , mines and other places where flammable gases used in motors, electrical motors were tested must pass after a reasonable gap and then into the tank . Use explosion-proof .  Air circuit breaker  of flammable gases , such as fuel gas tank , exhaust pipe guide when inflated to protect the tank on top of a breakthrough kraft paper, etc. near the outside , the use of electrical appliances must also use explosion-proof . Because the motor unit plus Tiegai be ensured by mechanical means . Brush sparking or electrical contacts can always sparks ignite explosive gases, explosion test : as long as the gas concentration reaches a certain value can cause an  air circuit breaker . This problem is inside the motor and tank test spark plug with a high voltage generator connected ( ie, the old machine new machine design and modification can not be ignored . Automotive ignition coil ) , there are two  power transformers  . Explosion-proof electrical design structure, material selection should meet explosion-proof electric motor connected to the subjects within the spark plug power supply, the motor combustible gas blasting machine technical requirements. New trial and for each product line-item fried routine tests are required . At this point the gas tank can not explode. Identification method is to tank Bu side. Breakthrough kraft not explode . If you were blasted , indicating the subjects can not be flameproof motors .

Ex-wave plate for hanging protective properties of the shutter is more mature

Civil air defense projects ventilation equipment types used internally complex, the production process is relatively backward means of detection, product quality can not effectively ensure ventilation. In order to regulate the ventilation ventilation protective equipment performance testing, protective equipment to improve product quality, it is necessary to develop a standard set of test bench. Currently, hanging plate proof protective  power transformers  of wave shutter has been more mature, and the ventilation valve on the hanging board performance study was relatively small. In this paper, the shutter mechanism and close the ventilation air flow  air circuit breaker , hanging plate ventilation valve test bench is designed to provide a theoretical basis. Hanging plate valve closed model mainly by the base plate,  mcb circuit breaker , hinged seat and limit housing component. Close valve when hanging panels, new air vents through the hanging plate inside and out diffusion chamber. If the wind gradually increased from 0 to slow the increases to a certain extent from the rear overhang board is placed phenomenon, this time from the air flow is called swing wind; when ventilation rate continues to increase to a certain extent, then hanging plate closes and the the air flow is called close air volume. Put the wind from the air flow volume and turn off the ventilation valves belong performance.

Explosion wave shutter design and structural strength can withstand high intensity explosive shock wave case

Explosion-proof valve is to protect the front wave trenches engineering personnel protective equipment is one of the important survival. It is installed in the tunnel inlet and exhaust system of the head. Usually the shutter is open, trenches normal ventilation; after suffering a nuclear attack, the quick closing valve prevents the shock waves through the mouth of radioactive dust into the tunnel  electric transformer  inside to  Circuit breaker , equipment safety. Explosion wave shutter design and structural strength can withstand high intensity explosive shock wave case, within the fortifications on the tunnel personnel,  air circuit breaker  has played a crucial role. As foreign nuclear power development of weaponry to the United States, Russia, represented by nuclear states, and its missile hit accuracy are improved quickly. Such as: U.S. Minuteman ICBM Ⅲ roadbed, Russia SS.19 roadbed ICBM CEP reach 200m ~ 300m. It is estimated at 50 tons TNT equivalent touchdown burst conditions, positions at 240m radius from the explosion center, and its resistance at 25MPa, the survival probability of 54% (structure and equipment suffered minor damage, the device does not affect use); pair of precision-guided weapons in terms of a higher hit rate.

Industry Association club and Nanyang Explosion-proof motors Electric Institute jointly

With the deepening of reform and opening up, all walks of life has changed dramatically, with the rapid economic and technological progress and industrial development on the product performance, quality, a new and higher requirements. China Electrical  air circuit breaker  Association,  power transformers  electrical motor branch of Nanyang Institute teamed up with the explosion-proof motor industry and users  mcb circuit breaker  research, on the basis of proof on the motor according to the current standards, as well as a comparison with the motor, integrated in the explosion safety and quality, energy conservation, environmental indicators and other aspects of the production process problems and security risks, as soon as the products included in the proposed national phase-out product catalogs, stop the production and sale of referrals, the motor security flaws, the motor will be replaced motor is based on GB3836-83 "electrical equipment for explosive atmospheres" "General requirements" and part 2 "flameproof electrical equipment" design, manufacture.

Explosion-proof motors are generally used in explosive environments

Explosion-proof motor is mainly used in coal, oil and gas, petrochemical and chemical industries. In addition, textile, metallurgy, city gas, transportation, grain and oil processing, paper making, medicine and other departments have also been widely used. With the development of production, there is a risk of explosion is also increasing, so how to choose a suitable explosion-proof motor it? We introduce the following aspects. Explosion-proof Motor and General Motors difference:  Electric energy meter  motors generally used in explosive situations; explosion-proof electrical junction box sealing better than ordinary motor; explosion-proof motor protection class minimum as I, but also some rather ordinary motor, it  electric meter  containing flammable, explosive, corrosive gases and relatively clean place, and used to drive a variety of machinery and equipment without special requirements, such as machine tools, pumps, fans, compressors,  circuit breakers , etc., and therefore can tell from the appearance. Through the motor can be divided into categories according to their functions and controls the motor drive motor; divided into categories according to AC power and DC motors; motor speed and power from the power relationship between the frequency classification can be divided into synchronous motor and induction motor;

Operator to enter the storage room and the plenum chamber shall not carry matches

If mixed with hydrogen in the air volume to the total volume of 4% to 74.2%, once the event sparks can cause a fire or explosion.  Air circuit breaker  to the hazardous properties of hydrogen, we have in the transport, storage and use of hydrogen process must pay attention to fire and explosion. 2 safety procedures ① operator must undergo a  mcb circuit breaker  and have higher job card issued by the department to mount guard, the operator strictly follow the rules and safety operation points executed. ②  power transformers  the storage room and the plenum chamber shall not carry matches, lighters and other fire, not easy to produce static wear chemical fiber clothing, shoes and shoes with nails to turn off the phone.

Homemade hydrogen station in two ways, one is the use of chemicals hydrogen, the second is the use of water electrolysis hydrogen

Currently the majority of our high-altitude stations compressed hydrogen from the hydrogen production plant, part of the high-altitude station using a homemade hydrogen.  Electric energy meter  station in two ways, one is the use of chemicals hydrogen, the second is the use of water  electric meter  hydrogen production. I got another one hydrogen from water electrolysis hydrogen station, so the hydrogen transport, storage and use of hydrogen process must pay attention to fire and explosion.  Voltage stabilizer  is a flammable and explosive nature of hydrogen gas, hydrogen flame burning in air temperature up to 1500 ℃, the oxygen in the combustion flame temperature up to 2000 ℃ ~ 3000 ℃. Its penetration force, highly penetrating, high temperature, high pressure, it can penetrate very thick plate.

Emissions caused by excess hydrogen combustion and explosion has become a must attach great importance to solve the problems with

Because non-polluting electric cars, energy efficiency advantages to become the 21st century's most promising new type of environmentally friendly cars. Its power source, most lead-acid batteries, hydrogen - nickel batteries, cadmium - nickel batteries and so on. Some data indicate that these batteries in electric vehicles usage accounted for 78% to 95%. Since the widespread use of these batteries, the car is moving and the charging and discharging process, especially overcharge and  air circuit breaker occurs, the emissions caused by excess hydrogen combustion and explosion has become a must attach great importance to and solve the problem. The concentration of hydrogen explosions have certain limits, introduce real-time monitoring system, according to the National Motor Vehicle Safety Standard GB / T1 8384.1-2001 (hereinafter referred to as the standard) in the case of  power transformers  hydrogen concentration at the request of the concentration of hydrogen in real time detection and alarm. System Development  Air circuit breaker  in the charge to the battery, should be measured within the area specified by the manufacturer of the concentration of hydrogen in the exhaust gas; when the vehicle is traveling inside the hydrogen concentration measurement. According to this requirement, the need for real-time monitoring system within a predetermined area (charge) and the vehicle (traveling within) the hydrogen concentration detected.

Electronic energy meter is a kind of works with conventional induction meter completely different new energy measurement instrumentation

Electronic energy meter is a kind of works with conventional induction meter completely different new electrical measuring instruments, with the development of electronic technology, improving the quality of electronic components, a number of domestic and  mcb circuit breaker  of single-phase, three-phase power table has gradually been widely used. Not only gradual change in the use of "electronic energy meter unreliable, unstable," the old ideas, but also shows how electronic energy meter  power transformers  and functionality of many advantages. Now widely used as induction meter by its working principle and manufacturing processes,  air circuit breaker  materials and other constraints, while reducing power consumption meter, improve accuracy and open tables published meter functionality is limited.

Induction meter only in a very narrow frequency near the frequency range and the voltage

Induction meter only in a very narrow frequency near the frequency range and the voltage and current for the fundamental conditions to ensure the best [for performance. In the case of a distortion of the waveform, the harmonic voltage and current  Voltage stabilizer  the turntable through  Circuit breaker  magnetic flux, causing fundamental changes in the magnetic flux distribution, thereby affecting the G-wave generator driving torque; Also, because the braking torque and flux distribution is almost irrelevant,  Electric energy meter  rotational speed changes, power metering errors. The harmonics of the power meter measurement error of j depends on how much content Mu are waves, harmonic current direction and other factors.

Affecting the operation of electric power networks also affect the measurement of electric energy meter

With the development of modern industry, power grid in a substantial increase in nonlinear loads, in many parts of the supply voltage waveform distortion (ie grid harmonic content increased dramatically), which seriously affect the operation of the power grid also affects the measurement of electric energy meter , giving a great deal of economic power transformers . As we all know, the majority of today's electricity meter or metering induction meter, it is driven components including voltage element and a current element, its role is to alternating voltage and current into  Voltage stabilizer  magnetic flux passing through the turntable, with the interaction of the induced current in the turntable, generating a driving torque, the power meter measured wheel rotation.

Capacitor harmonic amplification effect is analyzed theoretically

Harmonics and low power factor compensation capacitors in parallel loop meritorious cause measurement error increases, thereby affecting bus power balance. In this paper, a capacitor harmonic amplification effects of the theoretical analysis, harmonic analysis of the shunt capacitor equivalent circuit analysis of the role of mcb circuit breaker and reactor reactance rate selection, the parallel capacitor circuit capacitors in parallel and series reactor voltage and current theoretical calculations. Shunt capacitor Circuit breaker  amplification system with Voltage stabilizer  and branch equivalent reactance ratio related to the capacitor branch to join the series reactor, it can reduce the number of parallel resonant harmonics, reduce severe enlarged area width.

Harmonic reactive power compensation capacitor bank run adversely impact

With the harmonic load increases, the power system harmonic pollution is getting worse. In the installation of 10kV bus shunt capacitor banks are common reactive compensation. Harmonic reactive power compensation  circuit breakers  bank operation had adversely affected. On the one hand, reactive power compensation capacitors may cause harmonic air circuit breaker , leading to its harmonic overload, shortened life span, or even damaged. Even  power transformers  is that under certain conditions, reactive compensation capacitor bank together with the system parameters will result in resonance, a dangerous over-current or over-voltage, endangering the safe operation of equipment and systems.

In-depth systematic study of harmonics on the power meter and electric energy metering is essential

Meter is a core part of energy metering and basic measuring tools, and its measurement accuracy is directly related to energy metering accuracy. Therefore, in-depth systematic study of  Electric energy meter the power meter and electric energy metering is essential. Based on academic research and engineering applications, research and analysis induction meter structure and working principle is proposed based on an improved air circuit breaker  energy metering errors nonlinear mathematical model; analysis in the study of electronic power table and its time-division multiplier structure and  Voltage stabilizer , based on the multiplier was first established by the simulation model; through computational analysis and simulation analysis, the harmonics induction meter and electronic energy meter accuracy factors and the impact of a more comprehensive, in-depth analysis;

Increasing number of non-linear loads, capacity is also growing

With the power electronics technology in various industrial sectors and electrical equipment on the extensive application of the increasing number of non-linear loads, capacity is also growing, a large number of harmonics injected into the grid, so that the power system voltage and current waveforms serious aberrations.  air circuit breaker Instrument is designed for the frequency sine wave, resulting in incorrect data indicate.  power transformers  is the basis for economic calculation grid, energy measurement accuracy is directly related to the power supply and demand sides of the economic and social benefits. Ensure energy metering accuracy, reliability has very important significance.

Currents vary greatly, a shorter cycle, using the traditional power meter for measuring the load impact

As related to the electricity metering side and the supply side of the interests of the field of an electric power system has been widely concern. At present, the impact load on the power grid is widespread, such as rolling mills thyristor power supply technology used in the rolling mill, single phase welding machines, etc., this load at work, the current has changed dramatically, shorter cycle, using the traditional power meter to shock loads to be measured, often appear larger error,  mcb circuit breaker  side and the user side there is a big discrepancy metering of electricity, and the resulting energy metering chaos, triggering energy metering disputes. Therefore, the analysis of impact load on the electric energy metering, and using digital Voltage stabilizer  energy measurement error resulting quantitative analysis of the production site for the estimation of the actual energy measurement error, improving electronic energy meter design, reducing its  power transformers , has a certain practical significance. Mathematical model of impact load in order to analyze the impact of the load on the electric energy metering, you first need to establish the mathematical model of impact load, in this paper, in order to supply technology using thyristor mill example for analysis.

Multiplier is harmonic backdrop electronic energy meter measurement error resulting main links

Focuses on the electronic energy meter's internal structure and working principle, through the electronic meter error characteristics and frequency characteristics of the theoretical analysis, pointing out that the multiplier is a harmonic backdrop electronic energy meter measurement error resulting main components. Secondly,  electric transformer  wave modulation type time division multiplier (TDM) works to mathematical analysis, the establishment of electronic energy meter measurement error mathematical model. Multisim simulation software to build electronic energy meter  air circuit breaker , and verify that the simulation results of the simulation model was built correctly. Simulation model based on indicators in different circumstances specific harmonic simulation analysis, simulation waveform.

Relation to the grid metering economic accounting, related to power generation and supply, economic interests

Power system harmonic power quality indicator is one of the important parameters, with the vigorous development of power electronics technology and wide application, more and more non-linear loads connected to the grid, the grid harmonic content  Air circuit breaker , resulting in most of the measuring instrument measurement data is not accurate, give energy metering trouble. Relation to the grid metering economic accounting, related to power generation, electricity supply,  power transformers  economic interests. Meter is a core part of energy metering and basic measuring tools, and its measurement accuracy is directly related to energy metering accuracy. Therefore, in-depth systematic study of harmonics on the power meter and power measurement of the impact is significant.

Modern power management policies and systems, is a reference value

Industrial electronic energy meter and energy management in modern applications Jiangmen Power Supply Bureau Tianguang Qing Abstract This paper introduces industrial electronic energy meter types and functions, and gives such power meter features a comprehensive selection considerations; also spoke on the use of automatic meter reading systems and prepayment meter some of the views. This paper presents the view of establishing suitable for China's modern power management policies and systems, is a reference value, and thus the corollary of electronic  air circuit breaker and transformation of the original induction meter corresponding requirements; also available for meter manufacturer reference. Keywords electronic energy meter, feature selection, energy management,  mcb circuit breaker  systems, automatic  Voltage stabilizer , pre-paid an overview of the current, energy production and use table as the largest electrical instruments, has come a long history. Now widespread use of induction meter, manufacturing technology is quite mature, low price, durable, but because by its principles and structure and other factors, to further improve measurement accuracy and extended functionality is limited.

Dedicated power meter IC, the sampling voltage and current signals to be processed and multiplied

Power industry development requires electrical measuring instruments with suitable technical progress, power generation, transmission, distribution and consumption of power is required for accurate measurement. Meter has been one hundred years since the birth of history, the earliest and still widely used induction meter as a traditional power meter, the energy metering work has played a significant role. It has a simple structure, good  Air circuit breaker  and inexpensive features. Full  mcb circuit breaker meter electronic energy meter by the user power supply voltage and current real-time sampling, using a dedicated power meter IC, the sampling voltage and current signals to be processed and converted into electrical energy by  Circuit breaker  a pulse output proportional display . If necessary, it can be based on the provisions of the protocol (communication protocol), the stored data (electricity, etc.) uploaded to the host computer (master), the PC can also be used on the meter, electricity sales management. Because of its induction meter unparalleled advantages, developing very rapidly in recent years. With full electronic energy meter replace induction meter, in developed countries, the average annual rate of more than 20% in the replacement.

Shows the electronic energy meter performance and functionality of the many advantages

Some domestic and foreign production of single-phase, three-phase power meter has gradually been widely used. Not only gradual change in the use of "electronic energy meter unreliable, unstable," the old ideas, but also shows how electronic energy meter performance and  air circuit breaker  of many advantages. Now widely used as induction meter by its working principle and manufacturing processes, manufacturing materials and other constraints, while reducing power consumption meter, improve accuracy and open tables  power transformers  functionality is limited. The electronic energy meter in these areas have a distinct advantage, my unit electronic energy meter has been installed nearly thirty thousand, electronic energy meter advantage in the measurement of management has become increasingly significant.

Electricity production automation, energy metering and intelligent power management has been widely used

Electronic energy meter is also known as static energy meter is a rapid development in recent years, a new type of energy meter, with the economic development needs of the electricity market, as well as development of microelectronics  air circuit breaker , electronic energy meter with its unique features, in the power production automation, energy metering and intelligent power management has been widely used, but increasingly high demand. For the correct measurement of energy and  Electric energy meter , electronic energy meter has played an extremely important role. Electronic energy meter is a kind of works with conventional induction meter completely different new electrical measuring instruments, with the development of electronic technology, improving the quality of electronic components.

Conveying pulse signal will charge information for each household, converted into a pulse information

Electronic Energy Meter meter reading device centralized structure, the pulse energy meter, signal transmission cable, the master device and the communication device composed of four parts. Its basic working process is made by adding a pulse on the energy meter  electri cenergy meter , preferably with full electronic energy meter with pulse output device, do not mechanical installation of electronic energy  circuit breakers sent devices.  power transformers  signal will charge information for each household, converted into a pulse information, and through the respective signal transmission cables converge to the master device, the master device consists of counters, passive CPU, storage, protection battery self-test device component.

High voltage transformer insulating oil sulfur corrosion, oil furfural determination

To ensure the normal operation of the transformer operation, the power transformer fault diagnosis technology research is necessary. This selection of power transformer insulation fault for the study, from the high-voltage transformer insulating oil sulfur corrosion, oil furfural determination, oil dissolved gas  air circuit breaker  network in fault diagnosis analysis and research in three aspects: Foreign involved with most  Electric transformer  sulfur corrosion related accident, detected in oil dibenzyl disulfide (DBDS) this organic matter. Relevant domestic transformer insulating oil sulfur corrosion failures reported less experimentally simulate the presence of dibenzyl disulfide on oil performance.

Properly evaluate the transformer insulation state of life of the transformer track

Transformer fault diagnosis technology is properly assess the state of the transformer insulation premise, while the transformer accurate grasp of the internal thermal state largely determines the load capacity and service life of the transformer, the transformer insulation fault diagnosis technology is an extension and expansion. Only correctly assess insulated transformer, the transformer life tracking to the actual state of the transformer to make the right  mcb circuit breaker . Papers from the power transformer fault diagnosis and internal thermal state prediction starting transformer condition for achieving these two important aspects of maintenance conducted in-depth research, the main research work: For the common method of BP neural network fault diagnosis of  Voltage stabilizer  insulation methods, the paper focusing on its network of selected learning sample creation, input selection, the convergence of the learning process and algorithm  electric meter  on issues such as research, was established based on the amount of items and bring variable learning rate improved BP neural network power transformer fault diagnosis method , analysis and simulation results show that the improved BP neural network can achieve better oil dissolved gas content data to the fault type mappings.

Focus on solving the sector faces some challenges calculation method

Full comprises four main parts. The part of the system in-depth study of the finite element method sensitivity analysis of the basic principles and calculation methods, and focus on the field face some calculation problems. Currently, the optimization mcb circuit breaker  stays in the local  Voltage stabilizer optimization methods or stochastic global optimization method, in the optimization process, or trapped in local extrema can not find the global optimum; or need a lot of  power transformers  fields calculated according to certain rules to adjust the variable to be optimized, so that the objective function randomly gradually approaching optimum. Since a huge amount of calculation, the engineering and technical personnel unacceptable.

Some have important academic significance and practical value of the results

Comprehensive in-depth summary of the relevant literature, based on the power transformer insulation for the structure and design of electromagnetic theory and computational problems, to carry out a lot of research and calculation, made ​​some important academic significance and practical value of the results. With the rapid development of  Air circuit breaker technology and the electromagnetic field numerical analysis method perfected, so that the transformer insulation structure optimization and automatic design of  Electric energy meter  solutions become possible. Based on the finite element method and sensitivity analysis techniques, focusing on the overall structure of power transformer insulation arrangement, electrode shape optimization and design of electromagnetic program automatically issues.

Sine wave in the time domain and frequency domain equivalent circuit method equivalent circuit Combination

It is necessary to use a start of pumping with a large capacity, in the normal operation pumping unit has a small capacity, the capacity can be adjusted for the modulation capacity  air circuit breaker . The study load  Circuit breaker  of the transformer principle is the use of transformer capacity and loss of the relationship between the transformer losses and operating costs of the relationship between, from the "road" point of view, the use of equivalent sine wave in the time domain, etc.  mcb circuit breaker  circuit method and frequency-domain equivalent circuit combination form of time domain - frequency domain method is applied to the transformer characteristics of deduced load transfer capacity of the transformer magnetic circuit model and the model.

Left a large distribution transformer capacity margin

For pumping the load carried by the distribution transformer, the maximum load torque at the start, the maximum output power distribution transformer, the starting period of time, the load torque becomes smaller, the output power distribution  air circuit breaker is greatly reduced. Therefore, in order to meet the requirements of pumping starter, left a large  mcb circuit breaker  transformer capacity margin. The transformer load is low rate of long-term working status, resulting in a waste of transformer capacity and active and reactive power losses, reducing the efficiency of the transformer, increasing the network loss. To reduce the power supply to the pumping distribution transformer losses.

Intelligent information processing approach is the key technology research

Power transformer fault diagnosis methods include power transformer condition assessment, fault diagnosis and fault prediction. Data for the power transformer fault diagnosis of small samples, poor information characteristics, study the theory of intelligent information processing techniques mainline power transformer fault diagnosis methods, the main contents are as follows: ⑴ intelligent  mcb circuit breaker processing method of key technologies. In the study analyzed the key technology of intelligent information processing theory, based on the proposed intelligent  Electric energy meter theory to the main line of the power transformer fault diagnosis technology solutions. ⑵ power transformer condition assessment algorithm. Determine the power transformer condition assessment index system based on cloud model study whitening weight function of gray clustering analysis and improved combined weighted gray target theory of power transformer condition assessment model, a priori knowledge and experimental analysis through joint optimization of cloud model parameters, research at normal power transformers for the bull's-eye of the improved data weighted gray target theory algorithms, optimization status classification.

Electrical control to perform the control of the electrical control of the basic principles of the object

"Electrical operation and control" is the secondary vocational schools electrical, mechanical and electrical technology, electrical and mechanical maintenance technicians and other professional a main  power transformers courses. Its mission is to enable students to acquire motor, commonly used in low-voltage electrical appliances and circuit breakers  of basic knowledge, master control object to perform electrical appliances for the basic principles of electrical control, line and  Voltage stabilizer methods; enable students to have the ability to learn by analogy, to improve their practical ability, to learn new electrical control technology to lay a better foundation. Since this course is a very practical course, to get students to learn the course, using the theory and practice of integrated teaching methods more appropriate.

Relay contactor control system is a combination of theory and practice

Relay contactor control system is the electrical and electronic engineering curriculum combines theory and practice in a chapter more closely. By studying the contents of this chapter, students can not only learn a lot of theoretical knowledge, but also  mcb circuit breaker  the practical  Circuit breaker logical thinking ability. This chapter also learning difficulties, they not only want to learn a variety of electrical  Voltage stabilizer , working principle, but also know how to use text symbols and graphic symbols represent them, and based on this analysis, the design has a certain logic function control circuit, then grasp the basic relay contactor control system.

Off electromagnetic brake brake brake solenoid

Fast forward, fast forward and rewind the motor to achieve, work into the work into the motor to achieve. When the fast-forward into the motor while the motor and engineering work, the fast forward speed of the fast forward speed of the original plus a  mcb circuit breaker , rewind, rewind speed to the original speed minus a Work Speeds. M1 feed motor for the job for fast motion motor, SQ1 in situ trip switch, SQ2 feed conversion work for the trip switch, SQ3 for the end of travel switch, SQ4 to limit  power transformers  limit switch. KM1, KM2 for the control contactor M1 and M2, M2 is also affected by KM3 control. YB is off electromagnetic brake brake brake solenoid. Mechanical power slider relay contactor control system electrical schematics mechanical power slider works: Stages in place when: pressure limit switch SQ1, KM1, KM2 and KM3 are turned off, YB loss of power brake.

Specific methods are logical expressions and experiences simplification Simplification Act

In the design of the relay - contactor control circuit frequently encountered when multiple occurrences of the same label contacts phenomenon, and cost savings in order to simplify the circuit design must be simplified for contacts. In the relay - contactor control circuit contacts simplification, the specific methods are logical expressions simplification and experience Simplification, the former requires the designer has a good mathematical derivation ability, when the control circuit is  electric meter , due to the logical power transformers too cumbersome and error-prone process of mathematical deduction, is not practical; latter mainly depends on the designer's electrical controls design experience, the results are often not the most  mcb circuit breaker  simple circuits. Therefore, to find a theory is relatively simple, uncomplicated application simplification tool for relay - contactor control circuit design is important. The commonly used in electronic circuit simplification Karnaugh map used in the relay - contactor control circuit contacts simplification to study the Karnaugh map in the relay - contactor control circuit contacts simplification of the application.

Relay contactor control system of learning requires new thinking

Based on years of teaching experience, summed up some of the teaching methods, for your reference. Reasonable guidance, solid foundation is the first step, a good start is half the battle. Because relay contactor control system requires a new way of  mcb circuit breaker  learn: no longer concerned by the control circuit consisting of electrical voltage, current, and turned attention to the control circuit consisting of electrical, if the operation  mcb circuit breaker , the resulting control effect, so first we have to take the students have mastered the circuit theory, the use of  circuit breakers , guiding students imperceptibly transform ways of thinking, with its knowledge of the circuit has been mastered from the main building physical circuit, the basic control, so that when students do not know feel in control system design process in person perception.

The main application direction Electrotechnical

"Electrical Technology" non-electric class professional basic compulsory, which includes two parts: circuit analysis and motor control, and relay contactor control system is an important component of the latter is the main application of electrical  electric transformer . Relay contactor control system by means of electrical control to achieve a certain  Voltage stabilizer , both in respect to the control electrical applications, but also related to how effectively its constitution circuit control requirements. For students, this is a new content, but also the course one of the difficulties in learning, often there are certain difficulties.

With electrical protection and interlock device, is to enhance the machine's power systems and braking systems

Hoist control system for hoist high pressure, low driving force braking, the braking force is not driven, the driving force for the drag brake, brake band frequency, etc., and with electrical protection and interlock device, is to enhance the machine power system and the braking system, but also enhance the machine fails to protect the system. Two ore three levels of intake air shaft depth of 765m,  air circuit breaker  tons tub single bicycle cage, calculated to enhance the equipment selection, the final argument  mcb circuit breaker  in charge of the wellbore to mention extract task, the hoist maximum static tension: 200KN, maximum static tension difference: 180KN, motor power 2 × 800KW, the maximum rope speed 7m / s, using the electronic control system, the electronic control system is now in two ore three  electric meter  running into the wind failures are analyzed and explained approach. Electronic control equipment Scope: altitude does not exceed 1200m; ambient temperature not higher than 40 ℃, not lower than -20 ℃; relative temperature does not exceed 85%; around without conductive dust and metal and insulation has damaging effects of the gas;

Auxiliary converter system isolation contactor failure is more common converter

"Auxiliary converter I" of the two converters to Vll and V 12, "auxiliary inverter 11," the two converters to V21 and V22, a total of four sets of the entire vehicle, respectively, for the respective auxiliary power unit . Set any of them fails,  electric transformer  by isolation, conversion contactor load reallocation, can ensure locomotive maintenance operation. Kind, car segment more than three years in my practice, auxiliary converter system isolation, conversion contactor failure is more common, due to  air circuit breaker handling crew, resulting in more  circuit breakers , therefore, affecting the transportation and production.  failure is more common converteris faulty twisted addictedslave wild side ironing full clarity of J junction compensation in order to better and more S J Lin turned flower locomotive in practical problems.

Power supply to power the camera to overcome the shortcomings of the traditional split

Electric locomotive auxiliary system's main function is to ensure that the main circuit of the system to its full power, to ensure normal operation of locomotives. electric locomotive auxiliary systems, for the first time using the AC-DC converter  Voltage stabilizer  with the TGFll type four-quadrant auxiliary converter, splitter substituted for each locomotive auxiliary power supply. This power supply to  Circuit breaker the traditional shortcomings of split power the camera has become the future development trend of locomotive auxiliary systems.  mcb circuit breaker  locomotive is equipped with two sets of four-quadrant auxiliary converters, each containing two sets of auxiliary converter hook fresh squeezed same inverter device.

Switching power supply due to its state at high frequency inverter circuit

Large inductance and high charging rectifiers, bulky, cumbersome. And this power is the energy storage capacitor operating mode "is done and that charge" mode, thyratron and a high  electric meter  storage capacitor a  Electric transformer  the state, seriously affecting the thyratron and storage capacitor life. The switching power supply due to their work at high frequency inverter circuit, the transformer core is very small,  Circuit breaker  the need for large-scale energy storage capacitor coupled inductors and charge, therefore, small size, light weight. Switching power supply for the energy storage capacitor to adopt a "charging is completed, the release" mode, thyristors and capacitors to withstand high pressure of the time far below the resonant charging mode.

Better protection switching power supply provides a very good condition

Switching power supply has several decades of development history, since the late 1970s, with the development of modern power electronics technology, there has been a lot of excellent  air circuit breaker  and high power devices and integrated, powerful companion chip, which is developed a high efficiency , small size, light weight, easy to control, and better protection switching power supply provides a very good  electric meter . Early general use of the excimer laser resonant charging power for tens of thousands of volts to charge the energy storage capacitor, and  power transformers the thyratron gas discharge excitation and thus the light. Such power generally frequency transformers, large storage capacitor.

Xenon lamp-pumped all the disadvantages brought about

In view of this, we propose a new laser ranging technology - high repetition rate laser ranging technology. The system uses eye-safe low-energy (generally less than 1mJ / string) diode-pumped laser device, the xenon lamp pumped to avoid all the disadvantages brought largely to ensure the system  Circuit breaker  and safety; using thousands Hertz  Air circuit breaker , greatly increasing the amount of echo data and improve the accuracy of the standard point. With high precision event timer and a high frequency range gate generator, in coordination with the computer control system can achieve high repetition rate satellite laser ranging.

Ranging data is low, affecting the data to improve the accuracy

Current international satellite laser ranging stations ranging widely used frequency below 10Hz, using pulsed xenon lamp-pumped laser devices, although this ranging technology is quite mature, but the disadvantage is obvious: repetition frequency is low,  mcb circuit breaker  capture the satellite, LEO satellites for some or even undetectable data; ranging data is low, affecting the data to improve the accuracy;  electric transformer  of the laser output beam and pulse wave instability brings the system unstable and affect  electric meter  accuracy. These are restricting the Satellite Laser Ranging further scientific applications. Especially in recent years, there have been some mm-level precision scientific applications, this laser ranging system accuracy and the number of observations have raised further requirements.

Low power high harmonic pollution is rising

Electrical construction electrical design basis is the most important documents, the main factors affecting the quality of the project are: the design file is executed in strict accordance with state regulations, the depth of the design and construction documents relevant professional close coordination between the degree. Therefore, the electrical design of the whole project a top priority. Decline in quality design is particularly serious in recent years. There may be multiple reasons, such as the design of the vicious competition, lower prices between companies,  Electric transformer units to reduce inputs in order to reduce costs and so on. However, these symptoms are not chronic, as long as the design unit attached importance recurrent organizational design personnel to learn the relevant design standards and  electric meter  the design process of supervision,  mcb circuit breaker  review, you can basically solve such problems, but such small changes it can make project supervision and construction will benefit. Affect the quality of several electrical engineering design problems violate or deviate from the design Electrical design specification With the popularity of various household appliances, low-voltage power high harmonic pollution is increasing, times and odd harmonic multiples constitute neutral current, neutral overcurrent and thus lead to the phenomenon of electrical fires is also increasing.

Under pressure ring will follow the arc slide axially relative to the button bar

It should be noted, taken from a mechanical manual investigation groove depth is small, if roots unclear bottom pressure in the circular ring will follow the axial sliding movement relative to the button bar, the loss of a ring effect. Therefore, the design of the groove depth should be  power transformers  bigger, processing bottom  air circuit breaker  to clean the root, or simply use the pin structure is more reliable. About flameproof enclosure on the copper sleeve, joysticks require co-ordinated with  circuit breakers , copper sleeve is an interference fit with the housing, and the joystick is a clearance fit. Copper sets the amount of interference should not be too large, should be controlled not more than 0.05mm, copper sleeve wall thickness should not be less than 2.5mm, or assembly problems.

Mine explosion-proof electrical products in the technical development work

Mine production environment is very harsh, gas and coal dust explosions have occurred, therefore explosion-proof electrical switch design and manufacturing is very important. Author many years engaged in mining explosion-proof electrical products,  Electric transformer  development work on how to improve product safety, avoid safety hazards, and accumulated some experience. The main points discussed below are optional.  electri cenergy meter  groove on the rod-proof products, many manufacturers now shell and front cover has a variety of button, the button bar is often used form of ring, ring effect is that once the explosion occurred inside the enclosure, the pressure acting on the F button end of the rod when the rod ring prevents the button is pushed outside shell, thus avoiding the formation of the button bar missing booster channels.

Transformer Test line measurement is feasible

According Transformer Test criteria and computer control technology, designed to meet the computer testing methods; transformer short circuit test test on-line measurement for  air circuit breaker  simulation studies that illustrate Transformer Test line measurement is feasible. Test results are satisfactory; introduces oil gas analysis  Voltage stabilizer  commonly used in Rogers three ratio method, the application of BP neural network method to build transformer fault detection of BP neural network model; trained for transformer fault diagnosis, the results show that with the actual match.

Transformers can be put into operation guide reliable, safe and economic operation

Combined with the power system status and development needs, according to the transformer and more high performance requirements of the transformer and the actual current detection means perfect, with computer control technology, studied theoretically  electric transformer testing and fault diagnosis of technical methods to guide transformers put into operation a reliable, safe and economical operation. By analyzing the transformer  circuit breakers , sorting out the work to meet the power  Voltage stabilizer  testing standards, testing requirements and procedures; accordance with the "functional integration, structured microcomputer, monitor screens, management intelligent" requirements, design performance parameters of power transformers Integrated Detection System ;

Undervoltage release the power supply voltage is equal to the rated working voltage release

The MCB has delayed or disconnected without delay a trip, when the supply voltage drops (or even slow down) to the rated working voltage of 70 to 35 percent range, under voltage release should operate under voltage release the power supply voltage is equal to  air circuit breaker  35% of rated voltage when undervoltage release should be able to prevent the MCB is closed; supply voltage is equal to or greater than 85%  mcb circuit breaker  release the rated  electric meter , should guarantee MCB reliable closure. Therefore, when the power supply voltage by the protection circuit in a voltage drop occurs, automatically open the MCB cut off, so that the electrical load of the following MCB or electrical equipment from damage due to voltage.

Undervoltage release device which is attached a

With the mini circuit (hereinafter referred to as MCB) in the terminal building electrical distribution equipment widely used. Now with some of the electrical auxiliary devices and protection accessories (also known as attachment) with MCB body assembled together in  air circuit breaker  to increase the MCB, expanded scope of use. Undervoltage release is attached devices one of them. In this paper, suitable for use with MCB assembled  Electric transformer  release applications and design issues elaborated, introduces a voltage auxiliary circuit. An undervoltage release features undervoltage release is a protective accessory; at its terminal voltage drops below a specified range.

Wireless sensor network development and it is in people's lives and Production

Category summarizes the various localization algorithms proposed in recent years and representative application of the results, and focus on analyzing the advantages and disadvantages of each method. With the development of wireless sensor networks, and it is in people's lives and production application, the previous location  electri cenergy meter  is no longer able to meet the needs of production and life, people need higher positioning accuracy; and previous localization  circuit breakers  are mostly static , the node's mobile positioning is more and more demand. For the problem of low node positioning accuracy in distance-based localization algorithm based on RSSI, BP neural network algorithm to improve the positioning accuracy of the RSSI.

Door safety switch inadequately protected

Safety switch waterproof equipment failure caused by insufficient capacity, a combination of Italian-made CNC machine tools during machining, machine parts exchange when the door is closed, after rising rotary table should be rotated after a station stop and whereabouts, but suddenly appeared after rising rotation is not stopped, the operator immediately press the emergency stop, but in vain, the operator  mcb circuit breaker  turn off the main power tools, was able to stop. Cause of the problem was eventually found safety switch lock protection is insufficient. There are two normally open contacts close when mechanical cam lock, two groups of  air circuit breaker  turned on, open the door to the switch when relying on the internal coil is energized to open the lock, two groups of contacts while disconnected before they can open the door. Cause machine failure is due to the contact between the two groups was the inflow of coolant on, send the wrong signal turns turntable motor solid state relays.

The use of a great variety of electrical switching element controlling the movement of the machine

In machine tools, the use of a large variety of electrical switching element controlling the movement of the machine. Especially in the machine work area for electrical switch, because poor working conditions, protection of the switching elements have certain requirements. Electrical component protection at home and abroad generally IPXX graded. From a lot of the actual use of the situation: some current protection of  electri cenergy meter  can not be done with its own label corresponding to the IP level. It is important that the switch itself is not the problem but rather the waterproof test standards and the difference between the actual use. Speaking from an instance of the following, in order to explain this situation and analyzed. A safety  air circuit breaker  capability due to inadequate equipment failure my company a combination of Italian-made CNC machine tools during machining,  Electric energy meter  exchange when the door is closed, after rising rotary table should be rotated after a station stop and whereabouts but suddenly stopped rising after the rotation is not the case, the operator immediately press the emergency stop, but in vain, the operator immediately turn off the main power tools, was able to stop. Eventually found the problem because inadequate protection safety switch lock protection class IP65.

Improve on-time delivery rate and improving design accuracy once

While many companies in the design and low voltage electrical switches Guiji have been using a variety of CAD systems, to a certain extent, simplifies the design work, but just stay in the lower level of basic two-dimensional computer-aided design stage, when faced with changing user works contracts, it is difficult to achieve agile and  air circuit breaker . Thus, poor product design means designing and manufacturing enterprises often become the bottleneck link. In order to further reduce design time and improve on-time delivery rate, and improve design accuracy once,  Electric transformer  parts library design ideas, develop a set of high and low voltage electrical switchgear 3D standard parts library and switchgear virtual assembly system to solve the traditional enterprise  mcb circuit breaker  switch design displeasure, inconvenience, and allowed other problems. Computer-aided design software, the main function is to operate to achieve the user through an interactive design intent, but the user can not complete the special or specific requirements.

Simplify the mechanical structure of the electrical switchgear gold pieces, mostly rice and common standard parts

Four 3D graphic development methods (l) issue a simplified mechanical structure of the electrical switchgear gold pieces, mostly rice and common standard parts, easy to implement highly automated process, which is particularly suitable for the use of standard parts library approach to design. But electrical varieties Ying much  mcb circuit breaker , the one electrical abstract bounding (cube), the equivalent of a box just to accommodate electrical appliances, so the resulting cube geometry to achieve a maximized.  electric meter  the basis tomb positioning holes and wiring holes to facilitate later assembly, which can be simplified into a wide variety of electrical series square body design was larger simplified. (2) vB E electronically credited with 501 e interface solution electrical switchgear three-dimensional parametric design problem, we must first solve the high-level language and three-dimensional  air circuit breaker  interface. A mid-range three-dimensional product design software, is now in a three-dimensional CAD software mainstream product, powerful, cost-effective, is the development platform of choice. And any kind of CAD software is only available through the interactive features of the current version, it is difficult to accomplish many special or specific requirements of the job, requiring software provides an interface for the user to press a certain way to increase the desired function.

Electrical switchgear mechanical structure of sheet metal parts and General Electric Components

Electrical switchgear mechanical structure for the sheet metal component parts and General Electric, in order to further reduce design time and improve on-time delivery rate, and improve accuracy once the design to mass customization design ideas to meet the growing market demand for personalized, based on solid Edge environment,  mcb circuit breaker  of VisualBasic (VB) language, Access database and SolidEdge linkages among the three carried out the overall design of electrical switchgear, namely the development of electrical switchgear cabinet sheet metal parts and electrical components zero parts Gallery; through Solid Edge assembly  power transformers  studies, the realization of the different types of cabinet assembly and internal electrical component assembly. Gives the electrical switchgear classification hierarchy of sheet metal parts and electrical components of the three-dimensional modeling methods and components assembly relationship; series based on the size of standard parts for the Access database design to study the Access database and VB connection relationship; using VB calling SolidEdge methods to achieve the standard parametric design components, finished at SolidEdge environment "Electrical switchgear Parts Gallery" development;

Analysis of the electrical equipment fault diagnosis technology

Based on the analysis of the electrical equipment fault diagnosis technology, school-enterprise cooperation projects designed electrical equipment online fault monitoring and diagnosis system  electri cenergy meter fault diagnosis LAN remote fault diagnosis methods, the idea is: in what is now remote fault diagnosis has not yet fully When mature, the initial electrical equipment for mines built within a real-time monitoring of fault diagnosis system, the system  air circuit breaker  with internet, and then with internet connected electrical equipment to achieve remote fault diagnosis. To today's developed theory and advanced troubleshooting Internet technology into mine fields, to achieve remote mine electrical equipment on-line monitoring and remote fault diagnosis.

Complex structures for electrical switchgear

Through a series of secondary development of the integrated use of the method, the complex structure for electrical switchgear, tight, heavy workload, some parts have been serialized and other characteristics, the development of a dedicated electrical  Voltage stabilizer  dimensional CAD module. In this issue mainly for the following studies: UG NX-depth study of solid modeling, including solid modeling, expressions, and  electric meter ; depth study of the secondary development of UG NX, including: Application Programming Interface UG / OPEN API, menus and dialog boxes scripting tools MenuScript tools UG / OPEN UIStyler; study the process of  Air circuit breaker  of UG NX; studied electrical switchgear design, manufacturing processes; studied mechanical general shape characteristics of standard parts, as well as standard parts library are created.

Analysis of the electrical equipment fault diagnosis technology

Based on the analysis of the electrical equipment fault diagnosis technology, school-enterprise cooperation projects designed electrical equipment online fault monitoring and diagnosis system that uses  mcb circuit breaker  diagnosis LAN remote fault diagnosis methods, the idea is: in what is now remote fault diagnosis has not yet fully When mature, the initial electrical equipment for mines built within a real-time monitoring of fault diagnosis system, the system  electric meter with internet, and then with internet connected electrical equipment to achieve remote fault diagnosis. To today's developed theory and advanced troubleshooting Internet technology into mine fields, to achieve remote mine electrical equipment on-line monitoring and remote fault diagnosis.

Operation and maintenance of electrical equipment for mine status

Operation and maintenance of electrical equipment for mine status of electrical equipment in the event of failure, a sign that appears with a certain ambiguity, this paper fuzzy theory thus leads to transformer, for example, the fuzzy neural network technology  air circuit breaker  equipment fault diagnosis . For complex failure phenomena, such as the two faults exist, using the rough set theory analysis. Of a fault in the fault  circuit breakers  is confirmed, a multilayer neural network technology to pinpoint the fault diagnosis. If the single-layer neural network fault diagnosis to achieve fault type identification, then the multilayer neural network fault diagnosis not only identifies the fault type, and can determine the fault location.

Describes how to apply good mine electrical equipment

Describes how to apply good mine electrical equipment, electrical equipment for mines common principles and maintenance techniques, as well as common fault diagnosis and  mcb circuit breaker elaborate. Electrical equipment found to be faulty, we must first ask how is the failure to see the fault condition can not be too anxious to repair. If it is a new device that we should first look at the circuit schematic and structural characteristics of the device, according to the relevant rules for power transformers . Remove the front to fully understand the function of each electrical components, the location, as well as how to connect the relationship with other devices. If there is no assembly diagram, to the demolition of the same sketch, but also well marked. First look at the device is not there a more obvious cracks or burn marks, defects, etc., and then check its interior. To determine before disassembly rather than external fault fault then disassemble the machine. If the blind demolition, not only bad repair equipment, but also the more likely the more serious repairs.

electrical equipment and maintenance work

With the rapid development of coal mining enterprises, a variety of mining electrical switching devices are also made ​​great progress. Electrical switches work, how to  Voltage stabilizer  care and maintenance, repair the fault occurs, time is short, so that the switch can quickly resume normal work is required for coal mining enterprises. Today coal mining area is productive and efficient work, switch off the electrical power requirements also have strict requirements, timely and reliable electrical switch making and breaking current, in order to improve the operational reliability of the switch with the usual maintenance and switch maintenance are inseparable. In the coal mining enterprises, the use of electrical switches everywhere.

switch off the electrical power requirements also have strict requirements

With the rapid development of coal mining enterprises, a variety of mining electrical switching devices are also made ​​great progress. Electrical switches work, how to  Voltage stabilizer  care and maintenance, repair the fault occurs, time is short, so that the switch can quickly resume normal work is required for coal mining enterprises. Today coal mining area is productive and efficient work, switch off the electrical power  Circuit breaker  also have strict requirements, timely and reliable electrical switch making and breaking current, in order to improve the operational reliability of the switch with the usual maintenance and switch maintenance are inseparable. In the coal mining enterprises, the use of electrical switches everywhere.

Electrical equipment operating state transition from the off state to the sub-

When the electrical device from the operating state to the breaking state or from breaking state to the running state, they need to be operated by the electrical switch. To meet the mining system work, you need to take all the necessary electrical switches  electri cenergy meter . Mine Maintenance of electrical switch electrical switching system, the importance of coal mine safety work, largely depends on the daily maintenance of electrical equipment and maintenance work. As coal enterprises to exploit electric meter  safety performance requirements increase supply, repair and maintenance management increasingly apparent importance of the work, electrical switch maintenance costs account for the proportion of corporate overhead costs are also rising.

Various mining electrical switching devices are also made ​​great progress...

With the rapid development of coal mining enterprises, a variety of mining electrical switching devices are also made ​​great progress. Electrical switches work, how to  Voltage stabilizer  care and maintenance, repair the fault occurs, time is short, so that the switch can quickly resume normal work is required for coal mining enterprises. Today coal mining area is productive and efficient work, switch off the electrical power  Circuit breaker  also have strict requirements, timely and reliable electrical switch making and breaking current, in order to improve the operational reliability of the switch with the usual maintenance and switch maintenance are inseparable. In the coal mining enterprises, the use of electrical switches everywhere.

Electromagnetic release to differ materially from "permanent magnet" release

And the return spring force is always in the state, heating coils, electronic components, easy to aging and early spring weak electromagnetic tripping device failures are fatal  electric meter . With electromagnetic release to differ materially from "permanent magnet" release, only when needed action, the instantaneous power output of the control circuit, the drive coil (pull or release) action, and with a  mcb circuit breaker magnetic fields hold the armature in working position . Therefore, the author designed a permanent magnet based ATtiny microcontroller  circuit breakers  release, the release level in mW power levels can be achieved without fever, high reliability purposes. Permanent magnet-type release existing national standards, the power supply voltage drops to the rated voltage of 70% Ue ~ 35% Ue, the undervoltage release enables circuit breaker tripping.

Electrical equipment and wiring caused great harm

As network load increases and other reasons, resulting in insufficient voltage grid, it will motors, various types of electrical equipment and wiring caused great harm. Generally can be two kinds of solutions: one is to increase grid capacity; second is not  mcb circuit breaker  occasion using undervoltage release off the power. The second method will not only protect the electrical equipment under the level line, but also protect critical equipment in normal operation. Currently used undervoltage  air circuit breaker electromagnetic tripping device, which has a power self-reset function. But electromagnetic trip coil always energized, the control circuit is always output power.

Mechanical shock shocks on the ship when the main features

Mechanical impact on the ship on the ship when under attack ship structure is characterized by a sudden movement gained. The nature of this movement is very complex. The equipment on the ship (including circuit breakers) required to withstand sudden movement and not suffer. Ship structure produce sudden movement may be due to: ① non-contact  Voltage stabilizer ; ② contact explosion; ③ by a bomb exploded in the air or ship their weapons transmit the generated air waves. 1.2 Impact on the adverse effects of the circuit breaker breaker movement of the ship above the impact of the response will cause one or more adverse effects. These negative effects can be  electric transformer  follows: (1) mechanical damage usually takes the form of mechanical damage breaker member breakage or permanent deformation. If the damage is very serious that the circuit breaker can no longer perform its  circuit breakers , because of the impact that the failure of the circuit breaker. The word must be noted that failure nature of the damage, the mounting device may cause severe deformation of the circuit breaker is able to continue normal operation state, and the shaft or rod linkage may make slight permanent deflection not work. If the circuit breaker is not materially affected the availability, it can happen that there is no damage.

Ming as a station with spare change to meet the reliability requirements

Generally of a large electricity substation DC system power rectifier circuit breaker operating mechanism of energy storage power, disconnector operating power supply and cooling transformer OLTC power supply, communication power, lighting, power production, supply and maintenance life significant load power supply is required to have high reliability. 220 kV substation electricity systems are generally installed two electric meter stations, which are connected to the high pressure side should be on a different power supply, spare each other. 500 kV Substation, mostly installed three stations with variable and has a station connected to the external power supply, as the other two stand out with spare change to meet the reliability  power transformers . Substation transformer low voltage side of the main circuit breaker is typically configured undervoltage release, when the grid instantaneous fluctuations, flicker, regardless of station power low voltage bus will run in parallel or breakdown of the low voltage side of the transformer station to use the main circuit breaker tripped. Due to the low voltage circuit breaker undervoltage trip function generally do not have the automatic reclosing function, especially unmanned substation to substation stable operation of impact, therefore, some large substation transformer substation canceled the low pressure side of the main breaker undervoltage trip function.

Determining the DSP system and the peripheral function unit design principle

On this basis, determines the DSP system and the peripheral function unit design principles. Through the system's hardware and software integrated design,  Voltage stabilizer   intelligent release all protection functions. This paper discusses in detail the various modules of the hardware and software design principles. In order to ensure intelligent release in harsh field environments reliable implementation of various  Circuit breaker  functions, intelligent release papers on electromagnetic compatibility design were analyzed from two aspects of hardware and software designed to take a number of measures to improve the intelligent release stability and reliability.

Intelligent release is the core of intelligent low-voltage circuit breakers

Intelligent release is the core of intelligent low-voltage circuit breakers, not only has the general release of the various protection functions, but also has real-time parameter display, fault memory and queries, self-diagnostics, networking, communications and many other features. In the reviewed and summed up the development  air circuit breaker  release after  power transformers  the current smart appliances, especially the development trend of intelligent release is proposed based on DSP and CAN fieldbus intelligent release research direction. Paper discusses in detail the design  Electric transformer  of intelligent release from the electrical parameters of the sensor to the electrical parameters of the sampling method of calculating with intelligent release from a variety of protection features to achieve these protective properties of the mathematical model.

Undervoltage release the power supply voltage is equal to the rated working voltage release

The MCB has delayed or disconnected without delay a trip, when the supply voltage drops (or even slow down) to the rated working voltage of 70 to 35 percent range, under voltage release should operate under voltage release the power supply voltage is equal to release 35% of rated voltage when undervoltage release should be able to prevent the MCB is closed; supply voltage is equal to or greater than 85% undervoltage  lectri cenergy meter  working voltage, should guarantee MCB reliable closure. Therefore, when the power  mcb circuit breaker  by the protection circuit in a voltage drop occurs, automatically open the MCB cut off, so that the electrical load of the following MCB or electrical equipment from damage due to voltage.

Building electrical distribution equipment is widely used in the terminal

With the mini circuit (hereinafter referred to as MCB) in the terminal building electrical distribution equipment widely used. Now with some of the electrical auxiliary devices and  circuit breakers  accessories (also known as attachment) with MCB body assembled together in order to increase the MCB, expanded scope of use. Undervoltage release is attached devices one of them. In this paper, suitable for use with MCB  Circuit breaker undervoltage release applications and design issues elaborated, introduces a voltage auxiliary circuit. An undervoltage release features undervoltage release is a protective accessory; at its terminal voltage drops below a specified range.

Proposed various positioning algorithms and application of the results of representative

Category summarizes the various localization algorithms proposed in recent years and representative application of the results, and focus on analyzing the advantages and disadvantages of each method. With the development of wireless sensor networks, and it is in people's lives and production application, the previous location  circuit breakers  is no longer able to meet the needs of production and life, people need higher  electri cenergy meter  accuracy; and previous localization algorithms are mostly static , the node's mobile positioning is more and more demand.  of low node positioning accuracy in distance-based localization algorithm based on RSSI, BP neural network algorithm to improve the positioning accuracy of the RSSI.

People working out mandatory testing of measuring instruments measuring instruments catalog

AC meter (meter) is widely used for trade settlement measuring instrument, is a national compulsory verification work out people directory measuring instruments measuring instruments, in the event of  electric transformer , it will bring serious consequences to the enterprise. In actual test work, the measurement result depends on the availability of  power transformers  the uncertainty child. In order to improve the reliability of the test results, test results deal with the uncertainty assessment. Uncertainty theory using three-phase AC power meter (meter) measurement errors are Uncertainty.

Meter in the AC circuit, can be divided into two

Measuring instrument called a power meter. It is mainly used for a certain period of time, the cumulative energy generated by the generator or load consumption of electricity meter. Meter for AC circuits can be divided into two categories: single-phase and  air circuit breaker  watt-hour meter meter. (A) a single-phase watt-hour meter single-phase watt-hour meter is the basic structure of AC electric meter are generally based on  power transformers induction (eddy current) made ​​of the principle, so called induction system meter. Meter models were different, but its  Circuit breaker is similar. Figure 4-5-6 shows the structure diagram, mainly by the electromagnetic elements 2, the turntable 3, the braking permanent magnet 5, the calculation unit 6, the carrier 4 and junction boxes.

Strengthen the economic operation of electricity management, reduce electricity costs

As the company's power dispatch, adapt to the new company running business model is based to the safe operation of the transformation of economic operation, job content changes are  electric transformer attention to economic operation of power management. Therefore, the strengthening of economic operation and management of electricity, reduce electricity costs, the company dispatching and safety of both the main functions. Policy TOU  air circuit breaker  users in my company is a large industrial users of electricity charged by the electricity sector, including basic electricity, electrical degrees electricity tariff adjustment rate of three parts, which are several economical running costs of electricity tariffs as the main content.

High for low volume users of electrical degrees tariff calculation

Electricity consumed by the user and 1-10KV or 35KV voltage level and above two kinds of pricing of electricity. For high-volume users of its high degree of tariff electricity meter is recorded directly from the high-pressure direct calculation of the number of  air circuit breaker degrees of  electric meter tariff. The formula is: high for low volume users of electrical degrees tariff calculation, is in addition to the amount based on the amount of meter mark on the outside, plus the variable mcb circuit breaker operation consumed in iron loss and copper loss active power active power. Its tariff is calculated as follows: Note: Iron active power loss is the loss of power transformer core; copper loss is the current active power through the transformer coil wire sometimes consumed power.

Electrical degrees with Electricity tariffs to compensate for changes made ​​power supply

Calculated according to actual consumption of electricity section. Electrical degrees with Electricity tariffs to compensate for changes made ​​changes in power supply costs section. The residents and  mcb circuit breaker  users and electricity tariff that is payable for all its electricity; the implementation of the two-part tariff (see basic tariff) users and  circuit breakers tariff is only part of the tariff payable, together with its basic tariff was All tariff payable. Electricity tariff in  air circuit breaker the degree of power companies installed at the customer's billing metering device for active energy (see meter) readings as the base calculation.

Substation exception check processing expert system

Systems in the power system in a considerable number of areas to be applied, and has achieved remarkable results, but it substation operation exception handling applications in the field are few and far. This review focuses on transforming exception handling expert system was introduced. This research can be divided into two parts, one  electri cenergy meter  check processing expert system, the other part is inverted gate substation exception handling expert system. In the substation exception check processing expert system study, we analyzed the process of transforming exception  power transformers of causality, created a model of the tree of knowledge; Based on this knowledge model, carried out inference engine and database design; final in the development of this system on the platform of the programming. In addition, users of the system in order to improve the maintainability, the system also has a user-oriented knowledge editor.

Developers lack of systematic information management guidance and program design theory

The power industry is a special industry, which requires strict management, scientific and systems, which includes scheduling management, substation management, marketing management, line management, maintenance management and other aspects, which is the power substation operation management in the management of a very important work, which involves a wide range of workload, the importance of strong,  Electric transformer requirements. Substation management has long formed a complete and mature management mode, which is transforming the development of computer   electric meter  information system provides a good foundation. However, due to the lack of systematic information on the developer's guide and program management theory  air circuit breaker  problems such substation computer management information system in actual use, there are a lot of inconvenience. Therefore, this paper substation operation management information system in-depth study and research, combined with the actual production of electric power enterprise operation management information system for substation operation carried out analysis and design, and object-oriented language to be realized, the last of digital substation system Prospects and ideas presented.