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Basic characteristic parameters of circuit breaker 1) Rated working voltage UE The rated operating voltage is the nominal voltage of the circuit breaker, which can be operated continuously under the specified normal service and performance conditions. China stipulates that in

As we all know, mini circuit breakers are widely used in our home power system because of their small size, convenient installation and flexible use. It mainly has a short circuit protection (electromagnetic trip) and overload protection (bimetallic hot trip).

Molded case circuit breaker is commonly used in electrical components, on the number “3300” “3200” mean what? The first digit is the number of poles. The two poles are represented by 2, the three by 3, and the four by

The circuit breaker can protect the home line, once the home line failure, the circuit breaker can automatically trip, thereby reducing the accident loss, it can be said that the circuit breaker is the necessary electrical appliances in the home,

The core of intelligent circuit breaker is intelligent controller, which is also known as electronic trip, microprocessor trip and protection control unit, etc. It is the main basis to judge whether intelligent circuit breaker is advanced. DSP + CPLD mode,

Relay protection is an important measure to detect the fault or abnormal situation in the power system, so as to send an alarm signal, or directly isolate and remove the fault part. In order to accomplish its task, relay protection

1. The conttor phase loss must be replaced. This fault will cause damage caused by the load (motor) phase loss, and the superior circuit breaker trip protection, etc., which can not operate normally. The judgment method is measurement prevention (pay

1, AC contactor coil. The coil is usually identified by A1 and A2, which can be simply divided into AC contactor and DC contactor. We often use AC contactor, of which 220/380V is more commonly used: 2, AC contactor main

Relays are usually used in automatic control circuits. They are actually “automatic switches” that use a small current to control a large current operation. Therefore, it plays the role of automatic adjustment, safety protection and conversion circuit in the circuit.

Relay is essentially a switch controlled by an electromagnet, which controls the high voltage and strong current by the low voltage and weak current, so as to realize automatic control. It is a typical application of electromagnetics. The electromagnetization phenomenon