mine explosion-proof vacuum switch

mine explosion-proof vacuum switch,mine flameproof vacuum switch with MA, EX certificates.

 

mine explosion-proof vacuum switch,mine flameproof vacuum switch with MA, EX certificates

Applications

mine explosion-proof vacuum switch is suitable for control of direct starting or stopping three-phase squirrel-cage induction motor in insulated neutral or arc suppression coil grounding power supply system under the coal well with explosive gases and coal soot, with the rated voltage of 10kV, rated frequency of 50Hz and rated current of 400A. Besides, its also suitable for protection of the

motor and relevant circuit.

 

Features

1. The advanced CPU technology is adopted in the protector, which has enhanced function independence of individual parts and practicability of the system. Besides, the high-resolution A/D converter and the detection method of single measuring range are also used in the device, which has greatly enhanced the accuracy of data collection;

2. It adopts blue-backlight Chinese LCD display, which enables data display and all operations more intuitive;

3. It has the function of detection and display of the power factor and degree of imbalance between the phases as well as display of electricity consumption (active component) and real-time clock and so on;

4. It can provide protection in such cases as overload, short circuit, electricity leakage, insulation monitoring, overvoltage, undervoltage, three-phase imbalance etc.;

5. It has the RS485 communication function, which can network 2~999 protectors into the LAN or Internet with connectors.

 

Main technical parameters

Rated voltage	3.3KV6KV10KV
Maximum working voltage	3.6KV7.2KV12KV
Rated current	50A100A 200A 315A 400A
Rated frequency	50HZ
Rated short-circuit breaking current	12.5KA
Rated short-circuit switching current	31.5KA
Rated peak withstanding current	31.5KA
Rated short-time withstanding current	12.5KA
Rated thermal stable time	2s
Rated breaking times of the short-circuit current	30 times
Mechanical life of breaker	no less than 10000 times
Service life of isolation switch	no less than 2000 times