Explosion-Proof and Intrinsically Safe Type Multi-Loop Vacuum Electromagnetic Switch for Mine

• Certification: ISO9001, CCC
• Protection: Corrosion Resistance
• Installation: Vertical
• Housing: Cast Iron
• Ex Grade: Exd [Ib] I MB
• IP Grade: IP54
• Model NO.: QJZ-2400/1140(660)-8M
• Transport Package: Export Packaging
• Specification: L*D*H: 2000*900*1010
• Trademark: Wantai Group
• Origin: Huainan, China
• HS Code: 8537209000
• Production Capacity: 1000sets/Year

Product Description

QJZ-2400/1140(660)-10ML
Mining explosion-proof and intrinsically safe type multi-loop vacuum electromagnetic starter

Application
This equipment  is applicable to a mine containing explosive dangerous gas and coal dust. In the line of 50 hz and the rated voltage of 1140v (660v), the starting and stopping of the three-phase squirrel-cage asynchronous motor shall be controlled and protected at the same time. And the phase sequence can be changed at the time of the stop. And is especially suitable for centralized monitoring of the working surface with more concentrated power load such as mining, transportation, coal mining and the like. 

Technical Parameters

Model	QJZ-2400/1140(660)-8/10M QJZ3-2400/1140(660)-8/10ML	QJZ-1600/1140(660)-6M	QJZ-1200/1140(660)-6M
Rated operational current	2400A	1600A	1200A
Number of output loops	8,10 loops	6,4 loops	6 loops
Vacuum isolation phase changer	3 lines(each line 800A)	2 lines(each line 800A)	3 lines(each line 400A)
Shape size (L*D*H)	3250×928×1080mm	2000×928×1080mm	2300×928×1150mm
Rated operational voltage	1140/660V  50Hz
Vacuum contactor	Single circuit maximum rated current:400A
Input and output mode	Cable connector OR Disc type wiring device
Protection function	Overload, short circuit, overvoltage, undervoltage, phase break, leakage locking, gas locking, wind power locking
Fault query	Query and store fault information for 30 days at any time
Display module	The man-machine interface adopts embedded system, and the running condition is monitored dynamically.
Communication mode	RS485,CAN Bus, Ethernet
Control mode	Proximity control, security remote control, network control

Technical advantages and functional characteristics
1. Can complete motor overload, short circuit, overvoltage, undervoltage, phase break, leakage current locking, gas locking, wind power locking power measurement, communication networking protection functions.

2. The combination switch housing is cuboid and adopts quick door opening structure. It has reliable mechanical interlocking and electrical interlocking system.

3. Siemens PLC is used as the core control unit, which has field programmable and extensible input / output points. The network communication can be carried out conveniently, and the networking function is powerful. It has the functions of telemetry, remote communication, remote control and remote adjustment. It is convenient to realize the unattended working face and to achieve the centralized detection and monitoring of the ground dispatching room.

4. The Chinese display system can set the parameters of the combination switch and the single machine, the two machine and the double speed (including the single machine and the double speed, the double machine and the double speed) and so on, and has the display and memory function of the working state and the fault type. With friendly man - machine interface, the efficiency of judging and troubleshooting is greatly improved.

5. The pilot circuit of the combination switch is intrinsically safe, which can effectively prevent the occurrence of spontaneous starting accidents caused by short circuit or grounding of control line.

6. With multiple modes of operation (near control, remote control, network control) and multiple control modes (independent control, program control, double speed control, mixed control)