1, in the commissioning process, there is a starting phase missing phase fault, the soft starter fault lights, the motor did not respond. The cause of the failure may be:
When the starting mode is charged, the sequence of operation is wrong. (the correct operation sequence should be the main power supply first and the evacuation control power supply)
Second, the power supply phase missing, soft starter protection action. (checking power supply)
The output of the soft starter is not loaded. The soft starter can work normally after the output is connected to the load
2, the user in the process of starting, the bypass contactor does not attract phenomenon. The cause of the failure may be:
In the starting process, the protection device due to setting small, false action. (to reset the protective device)
The parameter setting of the soft starter is unreasonable when debugging. (mainly for the soft starter below 55KW, reset the parameters of the soft starter)
Control line contact bad. (check control circuit)
3. The phenomenon of jump air switch occasionally occurs in the process of starting. The cause of the trouble is:
(1) the setting value of the air switch is too long, or the air switch type is selected and the motor does not match. Parameter amplification of air switch or re selection of air switch
The starting voltage parameter of the soft starter is too high or the starting time is too long. According to the load condition, the starting voltage should be adjusted properly or the starting time should be shortened properly
In the process of starting, because the grid voltage fluctuation is relatively large, it is easy to cause the soft starter to send wrong instructions, leading to the phenomenon of early bypass. (advise users not to start high power motors at the same time)
When starting, full load starts. (starting as much as possible to reduce load)