QJZ-4*400(315, 200)/1140(660) Mining Explosion-proof And Intrinsically Safe Type Combined Vacuum Electromagnetic Starter
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- Model NO.: QJZ
- Specification: CE, ISO, CCC
- Trademark: CNC
- Origin: Wenzhou, Zhejiang
This series starter is applicable in underground coal mines with explosive and dangerous gas (methane) and coal dust, it is used to control various coal-mining machine, drag conveyer and other equipped sets of electric control equipment in working face of general mining, it can directly make control of start, stop, reversal and switching over with double speed to four sets of AC three-phase inductive motor with rated current of 400 (315, 200) A or tow sets of AC two-winding and two-speed electric machine, and it can also protect the motor and the circuit. The product owns advantages of high reliability and simple installation, operation and maintenance.
Blue screen real-time display for voltage, current, switch on and off and fault state of each loop.
Highly lumped control system of protector reduces fault happening which happened often in old time due to multi-protectors of combined vacuum electromagnetic starter, and it also obviously reduces the numbers of intermediated relay and time relay, reducing each kind of fault happening of control system.
Standard RS485/232 communication interface.
Multiple protective functions for overload, short circuit, under voltage, over voltage, loss of phase, leakage lockout, phase unbalance etc...
Four-key type adjusting menu is easy for operation.
Intelligent man-machine conversion function can store circuit, under voltage, over voltage, loss of phase, , leakage lockout, phase unbalance etc.
Memory function for fault.
The intrinsically safe contaol system can realize long distance control conveniently.
It can make programme control of single set, sequential control, combine control, double speed double loop. During single set control, each loop operates separately without interference, and there are separate current collection system and electric leakage check system. Programme control of the start delay and feedback delay time each set during sequential controland combined control is adjustable. For double speed and double speed double loop, it can conveniently set arc-extinguishing time between low and high speed, double loop start delay time and low-high speed switching over time, and it can also set time, current, current time and manual switching over mode to meet different requirements of users. When it needs to jog for chaining of drag conveyer, it can easily jog any loop of low or high speed electric.