Product use

Suitable for underground coal mine in explosive environment, in the rated frequency 50Hz, rated voltage 1140V, 660V, rated total current to 2000A, single-loop rated current to 1000A three-phase neutral point ungrounded power supply system, As the main switch of the centralized distribution system, contact switch, separate off, starter, lighting comprehensive protection and other devices exist at the same time, can be used as a - total seven points, two into eight out, two into five out of one contact, eight separate off and other combination feed switch form, and a combination switch can replace multiple power supply equipment, saving equipment space. It is conducive to the construction of standardized and intelligent mines.

The combined feed switch has its own power monitoring sub-station, which uses optical fiber or Ethernet to connect with the underground coal mine power grid monitoring system, can realize remote automatic control and monitoring and monitoring of power equipment, and realize modern management such as unattended substation.

Main feature

The shell of the combined feed switch adopts a translation type quick opening door, and each circuit adopts an independent flameproof chamber structure;

Circuit breaker adopts permanent magnet integrated modular movement, permanent magnet mechanism drive, unique three-phase independent suction and breaking technology;

Electric hand car function: circuit breaker module adopts electric and manual in and out of the car control, the distance between the moving contact and the main circuit static contact after module exit is greater than 45mm, there is an obvious fracture visible, making the switch more safe and reliable;

Circuit breaker module is composed of driving part, sampling part, control part, etc. It has high integration degree and small volume.

Integrated design: circuit breaker protection circuit board and mechanical parts are combined into one, simple replacement, easy maintenance;

Highly reliable redundancy design: the rated current of the circuit breaker vacuum tube is up to 1250A, the rated voltage is 7200V, the electrical protection adopts more than four protection, the protector circuit board adopts double CPU design, the closing and opening control adopts double system, and the control circuit board adopts the building block structure;

Manual switching function: When electrical failure occurs, the load can be cut off by manual forced tripping to ensure reliable operation of the power supply line;

Each circuit adopts independent intelligent protector and display screen, independent power supply; Integrated protector adopts advanced microprocessor and large-capacity new chip, with high-precision data processing and advanced protection algorithm, high protection accuracy and fast response speed. With short circuit, overload, overvoltage, undervoltage, three-phase imbalance, phase break, selective leakage, leakage block, wind power block, gas block and other protection functions;

The combined feed switch system voltage has 1140V and 660V automatic detection and switching function, without adjusting the input terminal of the control transformer to change the input voltage;

The passive wireless temperature sensor is used to measure the temperature of the main loop contact in real time, and the measured temperature is transmitted to the protector through the wireless receiver, which realizes the function of remote temperature monitoring and temperature rise protection in the main loop of the feed switch.

With pilot, program, network (RS485 and Ethernet) control, flexible and convenient;

Optional configuration of RS485, CAN, Ethernet interface, 4G/5G/WIFI and coal mine power grid monitoring system communication, with telemetry, remote control, remote control, remote message, remote viewing and other functions, to achieve unattended substation.

Main technical parameters