380V 440V Motor Protector AC Contactor Motor Soft Starter

ZK ST300 series soft starter mainly features:

ST300 online soft starter cabinet 3 Phase Input 3 Phase Output 380/440/480V
Built it circuit breaker, no need contactor can working.

1.16 SCM control, intelligent all-digital display

2.can be put into practice a soft starter control multiple motors.

3.Starting modes: Current limiting starter, Voltage ramp start , Kick start +current-limiting start, kick start +voltage ramp start . Current ramp start . Voltage current-limiting double closed –loop start.

4.free stop and soft stop , The stop time from 0 to 60 seconds can be arbitrary choosed.

5.Over current , Overload , Open phase, instantaneous stop and other fault protection. with the flow, over loading, lack phase, instantaneous stop, and other malfunction protection.

6.Easy installation, simple operation, strong function and reasonable prices.

7.5.5KW-75KW soft starter also have built-in bypass contactor. But the factory default is not with built-in bypass contactor.Clients need to confirm this once order confirmed.

Working Condition:

1. Power grid, self-provided power plant, electric generator : three phase 380V or 660V (specifical designed) ±15%, 50Hz or 60Hz, power capacity have to meet soft starter and motor starting requirement

2. Suitable motor: Squirrel cage three-phase asynchronous motor and the motor reated power shall be match with soft starter power

3. Starting time frequency: no special requirement, depends on the situation

4. Cooling method: Natural air cooling

5. Protection: IP20

6. Environment condition: altitude under 1000meters, temperature: 0 ~ 40 degree Celsius, humidity: under 90% RH

Soft starter Protection:

1. Voltage loss, undervoltage, overvoltage

2. Over-Current while starting or running

3. Soft starter over heat

4. Starting over time

5. Input or output phase losses

6. Three phase unbalance

7. Short circuit