Softstarter FAQ's

Answer:

Yes, it is possible but not for all types of softstarters.

Answer:

Pumps and conveyor belts loaded with fragile products are the two main applications suitable for soft stop

Answer:

The softstarter can normally be operated at a higher ambient temperature during operation if the rated current for the unit is derated according to the manufacturer's recommendation

nx� <5�� your Nt� ie5�� nal 8 and and use the Positive as a signal to the Stop/Start terminals

Answer:

The softstarter does not require a main contactor but ABB recommends the use of one for emergency stop and/or trip of the overload relay. In some applications an MCCB can be used instead of the main contactor

Answer:

Possibility the the motor is coasting to a stop and the Regeneration voltage is induced back into the load side of the softstarter. Check the SCR's without power to see if they are shorted.

Answer:

The PST softstarter has three different voltages levels on it. The Three phase Motor voltage, the (120-220)Vac Supply voltage, and the 24Vdc control voltage. The 24Vdc can be supplied extenally by removing the jumper between terminal 8 & 9. Then put your Negative on Terminal 8 and and use the Positive as a signal to the Stop/Start terminals