Causes of circuit breaker closing failure causes circuit breaker closing failure is the cause of various aspects, such as closing the operation mode is not good, closing the mother-phase voltage quality is not up to the provisions of the control circuit is disconnected and its equipment failure, but specifically there are only two levels of causes: one is the secondary circuit of the common faults of the electrical equipment, one is the power switch and the operating organization of the organization of the common faults of the machinery.

When the circuit breaker refuses to close the situation, as the operation of the staff should be able to distinguish between common faults in the secondary circuit of the electrical equipment or the operation of the organization of the equipment failure, the difference between the two key basis is to look at the red, green light labeling, flashing change in the situation and its closing AC contactor and closing the transformer core posture situation.

(1) when the control switch twisted to the "closing" part, the red and green lights do not produce changes in labeling, the green light is still flashing and the red light did not light up, the closing ammeter without shaking, the sound horn, such conditions have shown that there is no posture of the operating organization, the key to the problem in the secondary return of electrical equipment intelligent power circuit breaker Road, the closing of the commercial insurance melted or poor contact Phenomenon.

(2) When the control switch is twisted to the "closing" part, the green light extinguished, the red light did not light, the control switch back to the "closing" part, the red and green lights are not lit, in addition to give the safety incident speaker data signal, which indicates that the power switch is not closed at all, it is very likely that the operation, the operating business is not in the operation, the operation of the commercial circuit breaker. Possibly in the operation, the operation of commercial insurance melt off or poor contact phenomenon, if there is no security incident speaker data signal, the closing current meter labeling has shaken, the route is also a load current flow, and mechanical equipment points to the table pointer is also in the "close" position, it indicates that the power switch has been in the "close" part, then you should check the power switch. "part, then you should check the light bulb, socket, operation of commercial insurance and circuit breaker on and off auxiliary contacts is not poor contact phenomenon, if the above situation, the operation of the operation staff should be disconnected from the circuit breaker to clear the common faults, and then close the gate again.

(3) when the control switch twisted to the "closing" part, the green light after the extinction of the resumption of light or flashing, intelligent power circuit breaker closing ammeter shaking, such reasons are likely to have two levels: one is the closing power supply voltage is too low, resulting in the operation of the organization is unable to raise the power switch to raise the bar, the transmission mechanism posture is not completed, the second is the operation of the mechanism adjustment is not good, such as closing the transformer to raise the lever, the drive mechanism posture is not completed, the second is the operation of the mechanism adjustment is not good. Not good, such as closing transformer core overtravel or cache gap is insufficient, closing transformer core small chain adjustment is not good these, encounter such conditions, should ask the technical professional maintenance staff to go to the maintenance.