ZQMS Molded case circuit breaker (with lock)

Product overview

• ZQMS series molded case circuit breakers are improved on the basis of ZQM1.At present, there are five frame grades of 125, 250,400,630 and 800.The rated current ranges from 16A to 800A.This series of products has locking function, which can ensure the danger caused by unauthorized closing of the circuit breaker in the open state; Cage type terminal blocks greatly ensure the reliability of wiring.The specially designed terminal cover can reach the protection level of P30, which can effectively prevent touching live parts during operation.

• EC60947-2GB140482.

• ZQMS is composed of ZQM1 circuit breaker (#3) protective cover/terminal cover (#1)lock assembly (#5), and its performance is exactly the same as that of the ordinary circuit breaker ZQM1, which prevents the protected object from being damaged due to overload short circuit fault. The difference is that ZQMS,under the effect of the lock assembly, causes the danger of unauthorized closing after the circuit breaker is disconnected. If the circuit breaker needs to be closed, all components must be placed in the unlocked position to make it closed,otherwise the circuit breaker can not be closed.

• The working principle of ZQMS is as follows: when the circuit breaker is in the closing state, press the tripping button to open the circuit breaker No. 4 . When the lock component is in the locking state, the circuit breaker can not be closed without authorization. When the lock component is in the unlocking state, the circuit breaker can open and close freely. The design intent is toprotect the maintenance personnel from the accidental danger caused by the misoperation of non maintenance personnel during the actual operation of the circuit breaker, At the same time, during equipment commissioning and operation, avoid damage to equipment caused by misoperation of non equipment operators.

Note: The technical parameters of this product are the same as those of ZQM1 molded case circuit breaker.

Structure diagram