QM2 MCCB molded case circuit breaker

General

QM2 series moulded case circuit breaker(herein after called circuit breaker) is one of our new type circuit breakers, which adopts international advanced design and manufacturing technology, it can be divided into L type (standard type), M type (high breaking type), H-type (current limiting type) according to the rated ultimate short circuit breaking capacity (lcu). With the features of small and compact, high breaking capacity, short arcing-over distance, anti-vibration, the circuit breaker is used popularly on land and marine products, they are applied for the power distribution network of AC 50Hz,rated insulation voltage 800V (QW2- 63 to 500V), rated working voltage 690V(QW2-63 to 400V) and below, rated current up to 1600A, it can be used to distribute electric power and protect power equipment against overload, short circuit, undervoltage etc, It also takes protective effect when motors infrequently start and protecting against overload, short circuit and lacking voltage. In the series, frame ranging from 63-630A three-pole product also comes with a transparent cover, it is convenient for customer to observe the product operation. The circuit breaker can be installed vertically, or horizontally.  This product complies with standard of IEC60947 2.

Ambient and Installation Conditions

● Altitude up to 2000m;
● Ambient medium temperature should be within -5℃ to +40℃ (+45℃ for marine products);
● It can withstand the effect of damp air;
● It can withstand the effect of moulds;
● It can withstand the effect of nuclear radiation;
● The max inclination is 22.5℃.
● It still can work reliably when the ship subjects to normal vibration;
● It can still work reliably if the product subjects to the earthquake (4g).
● Places where the surrounding medium is free from explosion danger, and far away from gas or conductive dust that would erode the metal or destroy the insulation;
● Keep away from rain or snow.