ABB FAQ's

Answer:

Possible reasons can be one of these or in a combination:
-too low current limit
-too long ramp time
-too low initial voltage
-wrong tripping class on the overload
-wrong setting on the overload

Answer:

No, this is not possible since there will be no current going through the softstarter and some types will also indicate loss of load.

Answer:

If the main contactor is closed too late the softstarter will indicate this as a phase loss fault. Delay the start signal to the softstarter by approx. 0.5 sec. to solve this phenomenon.

Answer:

 Main contactor: always use AC-3.
By-pass contactor: it is possible to use AC-1.

Answer:

Reduction of power loss

Answer:

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

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