Introduction

This starter is suitable for use in underground coal mines where there is a risk of methane and coal dust explosions. It is designed for direct or remote starting, stopping, and reversing control of three-phase asynchronous motors operating at AC 50Hz, rated voltages of 660V, 1140V and below. It achieves automatic dual power source switching, ensures uninterrupted operation of fans, and provides protection against short circuits, overloads, phase failures, electrical leakage, undervoltage, etc. for the motor and related circuits. The overload protection provisions do not apply to the embedded overheat protection devices installed inside the motor.

Power Supply

1. Rated supply voltage: Three-phase AC1140V/AC660V
2. Input apparent power: ≤400kVA

Output Power Supply

1. Three-phase output voltage
a) Number of interfaces: 2 channels
b) Output voltage: AC1140V/AC660V (identical to the supply voltage level)
c) Output current: ≤200A

2. Intrinsically safe output
a) Number of interfaces: 1 channel
b) Output voltage range: DC (22.8~24.5) V
c) Rated operating current: 300mA
d) Overcurrent protection: ≤500mA

3. The switching time between the main and backup power supplies is ≤500ms

4. RS485 communication interface (intrinsically safe)
a) Number of interfaces: 1 channel
b) Transmission mode: master-slave, half-duplex, bipolar
c) Transmission rate: 9600bps
d) Peak-to-peak operating voltage: ≤12V
e) Maximum transmission distance: 2km (using MHYVP flame-retardant twisted-pair communication cable for mining purposes, with a core wire cross-sectional area not less than 1.5mm2)

5. Ethernet electrical port (intrinsically safe)
a) Number of interfaces: 1 channel
b) Transmission mode: TCP/IP full-duplex Ethernet electrical signal
c) Transmission rate: 100Mbps
d) Peak-to-peak value of signal operating voltage: ≤5V
e) Maximum transmission distance: 50m (using MHYV4×2×1/0.97 communication cable)

6. Ethernet electrical port (non-secure)
a) Number of interfaces: 1 channel
b) Transmission mode: TCP/IP full-duplex Ethernet electrical signal
c) Transmission rate: 100Mbps
d) Peak-to-peak value of signal operating voltage: ≤5V
e) Maximum transmission distance: 10m (using MHYV4×2×1/0.97 communication cable)

Main functions

a) It features an intrinsically safe RS485 output function.
b) It features an intrinsically safe DC24V output function.
c) It features a 1-channel intrinsically safe Ethernet electrical port function.
d) It features leakage lockout, undervoltage, overvoltage, three-phase imbalance, overload, short circuit, phase failure, and wind power alarm.
e) It features both hardware and software self-checking capabilities. In case of any issues, the system will display the corresponding error messages.
f) It features dual power switching, with automatic switching between the main and standby fans.
g) It features a working status display function, which can display the current time, three-phase current, grid voltage, insulation resistance (in the off-circuit standby state), wind power lockout, operating status (off/on), and fault information in real-time during operation.
h) It has 16-channel intrinsically safe switch input function.
i) It has a 16-channel passive switch output function.
j) It features 8-channel intrinsically safe analog input capability.