SMC-UNIT soft starter is used for induction motor to reduce the inrush current of motor starting, and has soft start and soft stop function, which can effectively protect the motor and control system.
This manual introduces the Dousheng SMC motor soft starter, describing its purpose to reduce inrush current and protect motors and coupled equipment. It outlines the functional features such as soft start, soft stop, forward/reverse rotation, display of operating time and current, and built‑in protection functions.
The document includes detailed specifications, model tables, dimensions, pre‑installation inspection guidelines, wiring terminal assignments, parameter settings for each operating stage, and troubleshooting error messages. It also provides wiring diagrams and terminal board descriptions to aid proper installation and maintenance. This manual is written in Chinese.
| Rated Voltage | Three‑phase AC 220V ±10% / 380V ±10% / 440V ±10% |
|---|---|
| Rated Frequency | 50 Hz and 60 Hz |
| Operating Temperature | -10 °C to 50 °C |
| Storage Temperature | -20 °C to 80 °C |
| Relative Humidity | 30 %–90 % (dew point above specified) |
| Cooling Method | Fan cooling when temperature exceeds 60 °C |
| Alarm Functions | Over‑current and over‑voltage alarms |
It supports three‑phase AC 220 V ±10 %, 380 V ±10 %, and 440 V ±10 %.
When the internal temperature rises above 60 °C, a fan provides forced air cooling.
It includes alarm circuits for over‑current and over‑voltage conditions.
Installation should avoid corrosive gases, oil, dust, high humidity, and vibration.