As the saying goes, “mechanical equipment is afraid to stop, electrical equipment is afraid to open”, and this is true in actual production. In general, the CNC winding machine does not start, you can start from the wiring error, voltage does not meet the motor nameplate requirements, protection device tripping, starting equipment problems, stator and rotor winding failure, start the load and other aspects to find the cause.

After normal shutdown in the production process, start again, generally will not appear due to wiring errors caused by the motor can not start normally, but for the newly installed or overhauled re-wired wire-wound motor is often prone to wiring errors. The wiring error referred to here mainly refers to the wiring error between the motor side current transformer with differential protection function and the distribution cabinet.

If this happens in the actual wiring process of the magnetic ring winding machine, it will trip the motor when it starts because the protection device reports a differential fault. Therefore, when wiring the transformer on the motor side and the transformer on the distribution cabinet side, special attention should be paid to the current detected by the two transformers installed in different locations for the same phase of the motor winding before the same phase is connected to the motor protection device as differential protection.

Máquina automática de solda de estanho em bobina de transformador

The winding machine is medium and high voltage electrical equipment, in practice, it rarely happens that the equipment cannot be turned on because of voltage problems, unless there are multiple equipment turned on at the same time, resulting in a large reduction in power supply voltage and cannot be turned on normally.

Protection device tripping is the most common and the main reason for the winding machine can not be opened normally. The protection device trips during the start-up process is generally due to overcurrent protection and differential protection.

There are three causes of overcurrent protection as follows.

(1) The protection device overcurrent protection value is set unreasonably.

(2) The load is too large or there is a mechanical connection failure.

(3) Stranding machine winding type motor itself or the existence of the starting device failure.

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