1. Function

This series mine explosion-proof and intrinsically safe AC soft starter is applicable in AC50Hz distribution system with rated voltage of 1140V, 660V or 380V and rated current of400A in underground coal mines with explosive and dangerous gas(methance) and coaldust. It is used to control the direct start and stop, soft start and stop of three-phasesquirrel-cage asynchronous motor in local or remote distance. It is an ideal new generationto replace traditional star-delta starter and auto-transformer starter.

3. Characteristics

1. Liquid crystal English display for each parameter with simple and straightforwardsetting and operation

2. The core adopts advanced all digital transmission controller of 16 digits single chip

3. Current-limiting start, voltage-ramp start, torque control, torque accelerated jumpingstart and other start modes.

4. Self-check protective function of short circuit, loss of phase, leakage lockout, overvoltage, over current, etc.

5. High reliability and anti-interference with very high voltage adaptability and high antiinterferenceability of power supply

6. Built-in EPROM can store each kind of spot parameter to save information in power offsituation.

4. Technical Parameter

1. Rated voltage(kV): 1140, 660, 380

2. Rated current(A): 400, 315, 250

3. Frequency(Hz): 50

4. Max.times of current overload: It's adjustable under 6 times

5. Start time(s): adjustable(max.60)

6. Start acceleration(m/s2): adjustable(max.60)

7. Cooling mode: natural cooling

8. Leakage lockout value(kΩ): 40+20%(1140V), 22+20%(660V), 7+20%(380V)