Qual poderia ser a causa da queima do transformador de controle?

Na indústria de máquinas de hoje, quase todas as máquinas-ferramenta requerem um transformador de controle. The role of the transformador de controle is often used as the local lighting power supply, signal lamp or indicator power supply for machinery and equipment, and can also be used as the control circuit power supply in electrical equipment. However, when using the transformador de controle, many people may encounter the problem of the transformador de controle being burnt out. In general, what causes the transformador de controle to burn out?

(1) The overloaded use of the transformador de controle transformer causes the temperature rise to be too large, which has exceeded the temperature resistance level of the insulating material, thereby burning the transformer.

(2) O isolamento entre espiras das bobinas primária e secundária está danificado ou envelhecido, há um curto-circuito entre as espiras e o superaquecimento local leva à queima.

(3) A parte de soldagem do fio de saída é soldagem virtual, e a resistência de contato é grande, resultando em uma alta densidade de corrente local, e até mesmo o fio pode ser fundido.

(4) Se o núcleo de ferro tiver parafusos passantes, os parafusos devem ser isolados de pelo menos um lado do núcleo de ferro. Caso contrário, se um curto-circuito magnético for causado, os parafusos serão queimados em vermelho.

The above 4 points are the main reasons why the transformador de controle is prone to burn out! After we understand these 4 factors, when we need to use the transformador de controle, we can avoid the transformador de controle with a little attention. burnt condition.

Response measures to transformador de controle burnout:

(1) For the transformador de controle to be burned out due to overload, it is required to replace a transformador de controle with a larger capacity. The power rating of the applied transformador de controle must be greater than that of the driven appliance.

(2) The cause of the circuit failure causes the short circuit of the low-voltage control circuit, which makes the secondary coil current of the transformador de controle too large, which exceeds the rated current of the transformer and burns the machine tool transformador de controle. In this regard, the current limit insurance can be added in front of the transformer for protection.

(3) It is usually necessary to check the insulation of the line. When the insulation of the transformador de controle is found to be damaged or aged, the transformer should be replaced in time to avoid leakage and short circuit.

(4) Verifique se há emperramento na parte giratória da máquina para evitar sobrecorrente.