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;

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.

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.

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 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.

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.

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.

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 ;

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.

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.

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.

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.

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.

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.

Equipment whole process of management is an important part

Substation maintenance of electrical equipment and scientific management of modern enterprises to organize production and management is an important means to improve the electrical substation equipment   power transformers management is to ensure the safety of power  circuit breakers , one of the important measures of economic operation, but also the whole process of device management is an important link. How to manage more scientific  Voltage stabilizer , improve equipment utilization, safety and reliability, lower maintenance costs, has to be placed in front of power enterprises unavoidable issue. A current shortcomings of the current maintenance plan, in accordance with the substation promulgated by the former Ministry of Power Industry "substation maintenance of order" execution planned maintenance.

Detailed analysis of the fault phenomena, draw suspicious range

The line in terms of complex, often have hundreds of components, thousands of connections, if taken one by one inspection methods, not only need to spend a lot of time, but also easy to leak  electric transformer . In this case, if the wiring diagram, using logical analysis, concrete analysis of the fault, draw suspicious scope to improve the maintenance of targeted, you can receive accurate and fast results. Analysis of the circuit to start the main circuit start to understand the various  circuit breakers of industrial machinery and institutions with a few motor drag, with each motor-related electrical components which, using what kind of control, and then according to the motor circuit elements used in the main circuit text symbols, drawing code and control requirements, find the corresponding control control circuits. ,

By controlling the electric current off solenoid controlled the mechanical movement

Solenoid valve solenoid valve has closed chamber, in different locations with holes, each hole connecting different tubing, middle piston chamber, both sides are two electromagnets, which faces the magnet coil is energized, the valve body will be attracted to which side, the movement of the control valve to open or close the drain hole different, and into the hole is always open, the hydraulic oil will enter a  electric meter  pipe, and the oil pressure to push the piston of the cylinder, and drive the piston rod, the piston rod drive mechanism. So that the electrical current through the control solenoid on-off control of the mechanical motion. Is  circuit breakers  controlled industrial equipment, is used to control the flow of  Voltage stabilizer , belong to the actuator, not limited to hydraulic, pneumatic. Used in industrial control system to adjust the direction of the medium, flow, speed and other parameters. Solenoid valve can be used with different circuit to achieve the desired control, and control to ensure the accuracy and flexibility. There are many solenoid valve, the solenoid valve in the control of different systems play a role in different locations, the most commonly used one-way valve, safety valve, the directional control valve, the speed control valve.

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)  circuit breakers  induced current in amperes force acting, need to do work outside, other forms of energy into electrical energy. Faraday's law of  electric meter  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.

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.