How to choose Soft Starter?

What should we pay attention to when choosing a Soft Starter, which parameters are important.

Many people decide by looking at the kW value and price, however, this choice is not correct.

Here are the things that need attention.

1. The current of the motor. (The Soft Starter to be selected should not be less than the motor current.)
2. The environment in which it will work is important. (If it is a warm place, it should be able to deliver the current required for the load at that temperature. That is, when the temperature increases, the current decreases, so temperature is one of the important parameters.)
3. It must have motor protection parameters. These must be carefully set and activated.
4. Does it include a by-pass system? (If it switches to by-pass after completing the start, no energy will be wasted on the Softstarter and the device will have a longer life. But the protections must continue.)
5. All three phases must have a thyristor block.
6. Pay attention to the type of load. If your load is a difficult load, such as a conveyor belt, it should be able to continuously deliver a current higher than the load current at 50 C.
7. Digital display and communication will inform you and communicate with your system.

The following criteria are taken into account when dimensioning Softstarters. They must be designed to be all at the same time.

1. Temperature,
2. Max. Departure current limit
3. Max. Departure time
4. Max. Number of departures. (within 1 hour)

There are 4 main parameters that can be adjusted in Soft Starter.

1. Departure current limit,
2. Initial voltage
3. Departure time
4. Downtime.

The selected Softstarter must be capable of both soft starting and soft stopping.