Troubleshooting substation with transformer

Found the following cases, the emergency disconnect each side of the transformer power supply: Internal strongly inhomogeneous noise and the sound of the spark discharge; conservator or spill-proof tube; casing burst, flashover discharge exaggerating; Oil and gas meter relay do not see the oil level; under normal load conditions, the temperature swells,  electri cenergy meter  the allowable value; If the standby power switch automatically when the power loss in the transformer, check switch is good;  power transformers  the high voltage side of the transformer isolation switch, it is checked if the switch into standby transformer should be good to keep the power supply. If the high voltage transformer fuse breaking work should be put into standby transformer, then opened the work on both sides of the transformer isolation switch, check its associated equipment to determine the cause of the accident.

As a controlled contactor control switch is widely used in electrical power transmission and industrial production

As a controlled contactor control switch is widely used in electrical power transmission and industrial production, which directly affect the performance and reliability of the entire power system performance and reliability. Electromagnetic contactor is closed and the key factors in the process of existence arc wear, especially in applications where high power DC arc of contact damage is more serious, the decision to become high-power DC contactor electrical life of breaking. DC  mcb circuit breaker  using conventional hybrid power electronic and mechanical switches connected in parallel method integrated the advantages of both, to achieve mixing without arcing contacts off, but due to the high power electronic  electri cenergy meter  cost, large size, the drive control circuit is complicated, making the process in high power applications do not have a high market value. In this paper, railway locomotive power DC contactor for the study presents a new high-power DC contactor hybrid design approach to contacts in the open, no arc affect the basic design requirements related to the course of action. The new proposed hybrid power DC contactor is closed by the bounce arc elimination circuit, breaking the circuit and eliminate the contact arcing composition itself.

Substation secondary cable has extremely important problem of electromagnetic compatibility

With increasing voltage levels and secondary equipment more and more decentralized, substation secondary circuit already in a strong electromagnetic environment in recent years has multiple causes substation DC system disruption caused by the secondary  electri cenergy meter  no fault tripping accidents, which caused a serious threat to the grid, affecting the safe and reliable operation of power systems. Therefore, the study of secondary cable substation electromagnetic compatibility  Voltage stabilizer  a very important theoretical significance and practical value. This paper focuses on the finite difference time domain method based on  air circuit breaker  transmission line theory and electromagnetic interference on the secondary substation cable coupling situation.

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.

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.

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;

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.

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.

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.

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.

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.

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.

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.

Study low-voltage AC contactor switch arc arcing process change in diameter

In the low-voltage AC contactor is closed and breaking electrical circuits, it will produce an arc between the contacts. Low-voltage AC contactor switch arc in its arc instantaneously reaches a high temperature, and thus would adversely affect low-voltage AC  electri cenergy meter  product performance, reduce the reliability of their products and reduce their electrical life. The main low-voltage AC contactor switch arc arcing during the arc diameter variations and temperature variations and  electric meter  and low-voltage AC contactor switch arc was simulated. Research can improve the contact material, improve the structure and enhance electrical low-voltage AC contactor electrical performance to provide support.

Induced current caused by the magnetic field induced currents are always impede change in magnetic flux

Lenz's law is expressed as: a magnetic field induced current caused by the induced current is always impede change in magnetic flux. That in order to obtain the induced current (electricity)  electri cenergy meter  induced current in amperes force acting, need to do work outside, other forms of energy into electrical  circuit breakers  law of electromagnetic induction acting ability to reflect the outside, the greater the rate of change of magnetic flux, the greater the induced electromotive force, the greater the ability to do work outside.

Discovery of the phenomenon of electromagnetic induction, electromagnetic field is the greatest achievement

Electromagnetic induction means for magnetic flux induced electromotive force of the phenomenon.
Discovery of the phenomenon of electromagnetic induction, electromagnetic field of one of the greatest achievements. It not only between electricity and magnetism reveals the intrinsic link between  Electric transformer  and magnetism but also for mutual  mcb circuit breaker  lay the foundation for human access to a huge and cheap electricity opened the way, there is great significance in practical. Discovery of the phenomenon of   electri cenergy meter   induction, marking a major industrial and technological revolution soon. Facts have proved that electromagnetic induction in the electrical, electronic technology, electrification, automation widely used for the promotion of social productive forces and the development of science and technology has played an important role.

Prevent the occurrence of the running capacitor circuit capacitor phase failure or damage

Improvement of the original distribution box wiring low voltage capacitor bank, its installation position on the trailer coupling from the AC contactor, low voltage  electri cenergy meter  box connected into the line between the meter and metering. Prevent the operation of the capacitor circuit phase failure occurs or a capacitor is damaged, resulting in  circuit breakers  measurement metering device. In addition, the capacitor selection model should be BSMJ series of products to ensure that the component quality, reliable, safe operation.
If you add a column with the radio frame, in the production of distribution box enclosure, the optional 2 mm thick stainless steel plates, and appropriately scaled  power transformers  box size in the width direction of the original box size by about 100 mm, that is, from original 680 mm to 780 mm. Improved power distribution box dimensions of, in order to increase the shunt outlet between the electrical outlet and the tank shell safe distance, it is a good agricultural electrician melting operation maintenance and replacement parts, but also to heat.

Protection circuit prevents power distribution box external circuit fault occurs

For the distribution  electri cenergy meter  capacity and above in 100kV · A distribution box, in the box by the side wall thermal windows, you should consider the mounting thermostat relay (JU-3-type or JU-4 subminiature temperature relay) and shaft flow fan, installed in the electrical control panel of the box on the left side  mcb circuit breaker  so that the inside temperature reaches a certain value (eg 40 ℃) can automatically start the exhaust fan, forced cooling exhaust heat to make the housing.
Use of protective  Air circuit breaker  distribution box powered external circuit failure. Choose smaller smart lack of protection, such as the choice of DA88CM-II phase motor protection module (Shanghai product) installed in the distribution box to prevent low-phase electric motor to run and burn.