As one of the supporting products of the switchgear, the spring operating mechanism may occur in the long-term use of refusal failures, refusal failures and misoperation failures. So how should we deal with these common failures of spring operating mechanisms? The following product official Let me introduce you in detail:

Refusal Fault

The refusal to close the spring operating mechanism refers to the situation in which the circuit breaker and the switch cannot perform the closing operation, and the reasons for this refusal to close are as follows:

1.The switch closing iron core is not activated, resulting in refusal to close

The refusal of the spring operating mechanism caused by this situation is mainly caused by poor contact and fuse failure when there is no voltage on both sides of the coil.

2.The switch closing iron core starts, but the switch four-link does not move and refuses to close

The main reasons for the rejection of the operating mechanism caused by this reason are the rejection of the action caused by the blockage of the iron core, the deformation of the iron core, the low coil voltage, the deformation of the four-bar linkage, and the deformation of the buckle surface.

3.After the four-bar linkage is actuated, the switch traction will not be released, resulting in refusal to close

This kind of spring operating mechanism rejection failure is caused by a variety of reasons, such as the drawbar does not leave the "dead zone", the four-bar linkage is deformed, the coil insulation decreases, resulting in increased resistance (smaller current), mechanical stuck, etc.

Refuse to break down

The failure of the spring operating mechanism to allow the circuit breaker to open normally is called a refusal to open. The refusal may be caused by the following three situations:

1.The iron core does not start and refuses to score

Like the refusal to close the fault, the coil has no voltage, poor foundation and other reasons will also lead to the rejection of points. If the coil is burned, the iron core may also be stuck, which may cause the operating mechanism to reject the points.

2.Rejection caused by the failure of the four-bar linkage to release after the iron core is started

Rejection caused by this reason may be caused by low coil voltage, small core stroke, and deformation of the core.

3.Four-link action but the link system rejects points

This reason causes the spring operating mechanism to reject points, mainly because the connecting plate system is stuck or the mechanical components have serious friction.

Misoperation Malfunction

There are three main situations for the malfunction of the spring operating mechanism: open after closing, automatic closing after energy storage and self-opening without signal.

1.open after closing

There are many reasons why the spring operating mechanism is automatically segmented after closing. It may be that the fault of the secondary circuit leads to the opening line being energized when closing; Cause; the return clearance is too large, it will also lead to instant opening after closing; if the four-bar linkage, the opening lock hook does not return, it will also lead to the occurrence of instant opening after closing.

2.Automatic closing after charging

After closing, the four-bar linkage does not return, the L-shaped lock is deformed, the motor power supply fails, and the lock bracket is loose, etc., which may lead to the occurrence of automatic closing after energy storage.

3.No signal self-segmentation

When the spring operating mechanism has no signal and automatic misclassification fault, we can check whether the relay contacts are closed, whether there are mixed lines in the secondary circuit, low operating voltage of the opening electromagnet, and the lock is deformed and cannot be locked firmly, etc., which may cause the spring The operating mechanism automatically opens without a signal.