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En la industria de la maquinaria actual, casi todas las máquinas herramienta requieren un transformador de control. The role of the transformador de control 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 control, many people may encounter the problem of the transformador de control being burnt out. In general, what causes the transformador de control to burn out?
(1) The overloaded use of the transformador de control 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) El aislamiento entre espiras de las bobinas primaria y secundaria está dañado o envejecido, hay un cortocircuito entre espiras y el sobrecalentamiento local conduce a la quema.
(3) La parte de soldadura del cable de salida es una soldadura virtual y la resistencia de contacto es grande, lo que da como resultado una alta densidad de corriente local e incluso el cable se puede fusionar.
(4) Si el núcleo de hierro tiene pernos de orificio pasante, los pernos deben estar aislados al menos por un lado del núcleo de hierro. De lo contrario, si se produce un cortocircuito magnético, los pernos se quemarán de color rojo.
The above 4 points are the main reasons why the transformador de control is prone to burn out! After we understand these 4 factors, when we need to use the transformador de control, we can avoid the transformador de control with a little attention. burnt condition.
Response measures to transformador de control burnout:
(1) For the transformador de control to be burned out due to overload, it is required to replace a transformador de control with a larger capacity. The power rating of the applied transformador de control 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 control too large, which exceeds the rated current of the transformer and burns the machine tool transformador de control. 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 control is found to be damaged or aged, the transformer should be replaced in time to avoid leakage and short circuit.
(4) Compruebe si hay atascos en la parte giratoria de la máquina para evitar sobrecorriente.
