Nader Circuit Breaker

1n rated current circuit breaker, refers to long-term through the current release, which is the rated current release. Maximum release was breaker trip unit with adjustable by the long term. Rated current 1n, refers to the maximum current release by the long-term. Long delay overload release operatin...

Short-circuit breaker breaking capacity ≥ lines prospective short circuit current. Suppose a power supply (SL7 10 / 0.4kV transformer) capacity of 1600kVA, the secondary current of 2312A, short-circuit current which is at the outlet end of 5m 42.96kA. Is a rated current branch 125A, since this leg ...

Shunt release is an accessory for remote control of opening. The shunt release is essentially an opening coil plus a release. Thermal trip and electromagnetic trip also use this trip unit. Apply a specified voltage to the shunt trip coil, and the circuit breaker will trip and open. Shunt releases are...

Universal circuit breaker is also known as frame circuit breaker : a mechanical switching device that can connect, carry and break current under normal circuit conditions, and can also connect and carry a certain time and breaking current under specified abnormal circuit conditions. . The operation o...

In the event of a power failure, the air switch will trip by itself, generally because the air switch has an undervoltage trip protection device. When the power fails, the undervoltage release will trip. The working principle of undervoltage release (see the figure below): 1. When the line voltage is...

A circuit breaker is a switching device that can close, carry and break the current under normal loop conditions, and can close, carry and break the current under abnormal loop conditions (including short-circuit conditions) within a specified time. Circuit breakers can be used to distribute electric...

The miniature circuit breaker is composed of operating mechanism, contacts, protection devices (various releases), arc extinguishing system, etc. The main contact is manually operated or electrically closed. After the main contact is closed, the free trip mechanism locks the main contact in the close...

What is a molded case circuit breaker? Molded case circuit breakers are generally suitable for the interface between the 400V power supply of the power supply system and the low-voltage power distribution system. They are widely used in the secondary load small power distribution box and the tertiary...

(1) Electromagnetic release When the current flowing is within the setting value, the suction force generated by the coil of the electromagnetic trip unit is not enough to attract the armature. When a short-circuit fault occurs, the short-circuit current exceeds the set value, and the attractive forc...

Circuit breakers are classified into universal type and plastic case type according to their structure. Among them, molded case circuit breakers are suitable for power distribution systems with rated voltage 690V, frequency 50/60Hz, and rated current 16 to 1600A or as protection equipment for transfo...