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Why does the soft starter have overheating protection, because not only the thyristor but also the motor must be protected. Even if the design consideration is better, the protection of the motor can still be completed when switching to the contactor circuit, that is, there are 3 main circuits. Line end, 6 outgoing line ends, the outgoing line to the bypass contactor first passes through the transformer in the soft starter, the protection device in the soft starter will detect the current passing through the contactor after the bypass, and complete the protection of the motor .

Sometimes customers will come to consult, and the soft starter has a fault phenomenon: the soft starter overheating fault light is on. What should be the reason for this kind of problem, the soft starter factory Aikeweier will study with you.

1) Reason: Frequent starting causes the temperature to be too high, which causes the overheating protection action of the soft starter.
To solve this problem, it is necessary to control the number of starts of the soft starter to no more than 6 times per hour, especially for heavy loads.

2) During the starting process, the protection element operates, so that the contactor cannot be bypassed, and the soft starter works for a long time, causing the protection to operate.
To solve this problem, you need to check the peripheral circuit.

3) The load is too heavy, the starting time is too long, and the overheating protection is activated.
To solve this problem, when it is necessary to start, reduce the load as much as possible.

4) The parameter setting of the soft starter is unreasonable. If the time is too long, the initial voltage is too low.
To solve this problem, the starting voltage needs to be increased

5) The cooling fan of the soft starter is damaged and cannot work normally.
To fix this problem, the fan needs to be replaced.