High-Voltage Vacuum Switch for Mining Mobile Substations

The KJGZY flameproof, intrinsically safe permanent-magnet HV vacuum switch feeds mining equipment from mobile substations. Independent breaker, isolating and wiring chambers allow safe live maintenance within a three-chamber flameproof design. A PLC/HMI control core provides 1A-step current setting, fault memory and password locking. Protection covers overload, short circuit, leakage, gas interlocking and emergency shutdown of the upstream supply.

Feature

• Independent Chambers：Equipped with independent circuit breaker chamber, isolating switch chamber, and wiring chamber, enabling live maintenance, safe and reliable operation and upkeep.

• High Precision：1A step setting for higher precision.

• Effective Explosion Protection：Integrated three-chamber design ensures reliable explosion protection.

• Digital Control：Adopts an industrial programmable logic controller (PLC) and human-machine interface (GOT) to form the core control system, featuring stable performance, precise protection, and simple maintenance. It also has fault memory and password locking functions.

Advantage

• Stable Operation：Adopts an industrial programmable logic controller (PLC) and human-machine interface (GOT) to form the core control system, featuring stable performance, precise protection, and simple maintenance.

• Safety and Reliability：Current can be continuously set with a step value of 1A, enabling safe and reliable live maintenance, operation and upkeep. All faults trigger the high-voltage side vacuum circuit breaker to trip via signal lines, reducing breaking current.

• Multiple Protections：Equipped with protection functions including overload, short circuit, overvoltage, undervoltage, leakage, leakage locking, phase loss, over-temperature, wind power and gas locking, emergency shutdown of upper-level power supply, etc. It can also protect against faults fed back from the low-voltage side of the mobile substation.

• Modular Design：Comes with standard RS232/485 communication interfaces, featuring powerful remote communication and control functions. It has a small size, reasonable structure and intuitive operation.

Parameter

Environmental Conditions

• Ambient air temperature: -20 ℃ ~ +40 ℃
• Altitude: ≤1000 m
• Relative humidity: ≤95%

Application

• Power supply and protection for the high-voltage side of mining mobile substations
• Power feed for underground equipment in large mines (fans, pumps, roadheaders and continuous miners)
• Switching and protection for mine high-voltage ring networks
• Short-circuit and overload protection for high-capacity mining, ventilation and pumping equipment
• Underground power distribution in coal mines with explosive methane and coal dust hazards