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Help Center[hunan Chuang'an Explosion-proof] Qjz-□/1140(660)-□ Mine-used Flameproof and Intrinsically Safe Multi-circuit Vacuum Electromagnetic Starter
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QJZ-□/1140(660)-□
Mine-used flameproof and intrinsically safe multi-circuit vacuum electromagnetic starter
Purpose and scope of useApplication and range of application
This series of starters is suitable for use in underground coal mines and environments where there are explosive mixed gases such as methane and coal dust in the surrounding medium. In an alternating current50Hz, with a rated voltage of660V or1140V, and a rated total current up to2400A in a three - phase power grid with an ungrounded neutral point, it serves as a starter switch for various equipment in mining areas and other working faces. When equipment malfunctions such as overload, short - circuit, over - voltage, under - voltage occur, it can automatically cut off the power supply and display fault signals. The switch has a leakage lockout and test function before closing, and can display the current and voltage values of each branch during operation; It has protections such as under - voltage, overload, phase loss, short - circuit and leakage lockout. It can achieve single - unit control, single - machine two - speed, and double - machine two - speed control for the controlled motor, and can change the phase sequence of electricity through the isolating switch when the machine is stopped. For shearers, scraper conveyors, main motors of belt conveyors, oil pump motors, cooling fan motors, belt tensioning motors, belt winding motors, crushers, loadersIt can start and stop motors such as generators, and protect the motors and power supply lines, achieving the goal of automatic control of power supply equipment in mining areas or other working faces.
Product featuresProduct features
ProtectionThe protection and control system uses an advanced programmable logic controller(PLC),with high-precision data processing and advanced protection algorithms, featuring high protection accuracy and fast responsespeed.It can perform functions such as leakage blocking,overload, short circuit, phase loss, undervoltage, and overvoltage protection. It has the advantages of high intelligence purity, stable performance, diverse control methods, and reliable operation;
It usesa 10-inch industrial control screen for display; it can show the working status, parameters, and fault types of the switch, with a user-friendly interface; it has good man-machine dialogue function, which can greatly improve the efficiency of fault diagnosis and troubleshooting;
The switch can display the system voltage, three-phase current of each circuit, and the opening and closing status of the switch in real time;
Allanalog signals are processed into digital signals, with the advantages of strong anti-interference ability, simple wiring, large amount of information, and reliable control;
It can achieve close-range, long-range control, and two-speed control. The control methods are flexible and diverse, and can also be customized according to the specific requirements of users;
It has complete self-check and self-diagnosis functions, which can conveniently check whether the protection and control system is normal, as well as the communication function with the host computer;
It has a 4.0KW(127V) lighting comprehensive protection device circuit.
Remote control adopts intrinsic safety control. The intrinsic safety parameters are: voltage 21.8V(AC), current 78mA(AC)
It has RS485 or CAN bus communication interfaces.
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