· According to the control Voltage stabilizer can be divided into DC contactor, AC contactor.
· Press the operating electric meter can be divided into Air circuit breaker contactor, contactor hydraulic, pneumatic contactors
· Press the action is divided into direct acting contacts, rotary contactor
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2013年8月25日星期日
Air electromagnetic contactor
Electromagnetic contactor (English: MagneticContactor) mainly by the contacts system, the electromagnetic mcb circuit breaker, brackets, auxiliary contacts and the shell (or chassis) components.
Because AC electromagnetic contactor coil generally use AC power, after excitation in the contacts, usually high-decibel sound "slightly" noise, which has become the characteristics of electromagnetic contactor. While the 1980s, air circuit breaker have developed AC contactor solenoid silent and power, the basic feasible solution is to use the AC power step-downCircuit breaker, then through an internal rectifier into DC power supply, but the complexity of the control means rare.
Because AC electromagnetic contactor coil generally use AC power, after excitation in the contacts, usually high-decibel sound "slightly" noise, which has become the characteristics of electromagnetic contactor. While the 1980s, air circuit breaker have developed AC contactor solenoid silent and power, the basic feasible solution is to use the AC power step-downCircuit breaker, then through an internal rectifier into DC power supply, but the complexity of the control means rare.
Electromagnetic contactor function
AC contactors use the main contact to open and close the circuit, with auxiliary contacts to turn the control loop.
Generally only the main contacts normally open contacts, and often two pairs of auxiliary contacts air circuit breaker open and normally closed contacts function, small contacts are often used as intermediate relay with the main circuit. AC contactor contacts, the silver tungsten alloy with good mcb circuit breaker conductivity and high Circuit breaker ablative. AC contactor AC solenoid power comes from the action, the electromagnet consists of two "mountain" shape the young quartet built silicon, one fixed, put coils in the above, the operating voltage has a variety to choose from. To make magnetic stability, the core of the pull side, coupled with short-circuit loop. AC contactor in the loss of power, relying on spring return. The other half is the active core, and the fixed core structure to drive the main contacts and auxiliary contacts of the switch. More than 20 amps interrupter contacts plus a hood, disconnect the circuit using the electromagnetic force generated, quickly pull off the arc, to protect the contacts. Contactors having to do high-frequency power is turned on and off control, the maximum operating frequency and even up to 1200 times per hour, no problem. The high life of the contactor, mechanical life is typically a few million times to ten million times, life in general, compared to hundreds of thousands of millions of times.
Generally only the main contacts normally open contacts, and often two pairs of auxiliary contacts air circuit breaker open and normally closed contacts function, small contacts are often used as intermediate relay with the main circuit. AC contactor contacts, the silver tungsten alloy with good mcb circuit breaker conductivity and high Circuit breaker ablative. AC contactor AC solenoid power comes from the action, the electromagnet consists of two "mountain" shape the young quartet built silicon, one fixed, put coils in the above, the operating voltage has a variety to choose from. To make magnetic stability, the core of the pull side, coupled with short-circuit loop. AC contactor in the loss of power, relying on spring return. The other half is the active core, and the fixed core structure to drive the main contacts and auxiliary contacts of the switch. More than 20 amps interrupter contacts plus a hood, disconnect the circuit using the electromagnetic force generated, quickly pull off the arc, to protect the contacts. Contactors having to do high-frequency power is turned on and off control, the maximum operating frequency and even up to 1200 times per hour, no problem. The high life of the contactor, mechanical life is typically a few million times to ten million times, life in general, compared to hundreds of thousands of millions of times.
Circuit breaker operating mechanism
Operating mcb circuit breaker belongs storage type, it is to use pre-stored energy spring operating. Front can be manually operated spring charging handle or use gear motors electric operation. electric transformer in the closing operation is electric meter stored energy.
By installing the operating in-house closing and tripping coil, and the use of gear motor for spring charging, the circuit breaker can achieve remote control operation, if necessary, you can also monitor system with.
By installing the operating in-house closing and tripping coil, and the use of gear motor for spring charging, the circuit breaker can achieve remote control operation, if necessary, you can also monitor system with.
ABB Air Circuit Breakers
Plant for the air circuit breaker, complex systems and electronics from a total protection, can be used to protect electric transformer, motors, transformers and capacitors. Air circuit breakers for use and installation of all factories in ships, mines and substations for primary and secondary distribution. Air circuit breaker (fixed and withdrawable) have the same height and depth, can be electric meter in the switch cabinet, its performance to ensure operator safety. Phase to phase, phase to neutral are Electric energy meter, and on the arc chamber and the main contact for the complete examination. The circuit-breaker. The circuit-breaker is made of sheet steel, can reduce the size of the circuit breaker and look sophisticated, using double-insulated isolation charged body, enhance its security, and between the phases are completely separated.
Automatic air circuit breaker
Voltage circuit breaker (once called automatic switch) is not only making and breaking normal load current and over-load current, but also short-circuit mcb circuit breaker and breaking of the Voltage stabilizer equipment. Low-voltage circuit breakers in the circuit, in addition to a controlling role, but also has a electric meter, such as overload, short circuit, undervoltage and leakage protection. Voltage circuit breakers can be manually operated directly and electric operation can also be remotely operated from afar
Definition and classification of air circuit breaker
Air circuit breaker (automatic switch): A circuit breaker. Insulating medium is air. A manually (or electric) closing, with the closing position to maintain lock by acting on the tripping mechanism and having an arc extinguishing device tripping pressure switch, is being widely used below 500V AC and DC devices in the circuit in as connected, breaking and carrying rated current and short-circuit and overload fault currents. When the circuit from Electric energy meter, short circuit, the voltage electri cenergy meter or disappeared, can automatically cut off the circuit for reliable protection. Breaker dynamic and static contact and touch bar design pattern varied, but to improve the circuit breaker breaking capacity is the main purpose. Currently, the use of certain contact structure, mcb circuit breaker the short-circuit current limiting peak limiting principle, to improve the breaking capacity of the circuit breaker has a significant role, and are widely used.
ACB has said automatic air switch, used to making and breaking load circuit can also be used to control the infrequent start motor. From a functional perspective, it is equivalent to knife switch, over-current relay, loss of voltage relays, thermal relays and other electrical leakage protection function of some or all of the sum of the short circuit, overload, under voltage and leakage protection and so on.
ACB has said automatic air switch, used to making and breaking load circuit can also be used to control the infrequent start motor. From a functional perspective, it is equivalent to knife switch, over-current relay, loss of voltage relays, thermal relays and other electrical leakage protection function of some or all of the sum of the short circuit, overload, under voltage and leakage protection and so on.
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