KJGZY High-Voltage Permanent Magnet Mechanism Vacuum Switch for Mining
A high-voltage flameproof and intrinsically safe vacuum switch for mining mobile substations, it adopts a permanent magnet mechanism and multiple protection logic, supporting coordinated control of overload, short circuit, earth leakage, and gas interlocking. It features strong breaking capacity and stable, safe, and reliable operation.
Product Introduction
Key Specifications
Rated Voltage
3.3kV、6kV、10kV
Rated Frequency
50Hz
Rated current
200A~1250A
Explosion-proof rating
Exd I Mb
Protection Class
IP54
Applications
High-Voltage Side of Mobile Substation
HV-side feeding and protection, with focus on multiple interlocks
Mine High-Voltage Ring Network
Mine high-voltage ring network systems, emphasizing reliable switching and protection logic
Power Feeding for Large Equipment
High-voltage power supply circuits for mining equipment, focusing on short-circuit and overload protection
Product Overview
- Four independent flameproof chambers: the main chamber is de-energized after opening, allowing maintenance without switching off the upstream power supply
- Multi-person cooperative interlocking: 4-position redundant padlocks prevent closing until all personnel have completed work and removed their locks
- Dual-drive redundancy: permanent magnet drive as primary with manual mechanical backup, ensuring reliable open/close operation even during power outages
- Visual status: transparent arc barriers with backlighting show contact positions at a glance; reserved interfaces for temperature sensing, infrared, and more
- Quick-opening structure: external snap clips + internal latches enable tool-free door opening by a single person in about 10 seconds
- Smart connectivity: unified isolated RS485/RJ45 interfaces on the high- and low-voltage sides connect directly to the monitoring platform, supporting remote O&M
Product Features
Safe design
Flameproof enclosure suits underground coal mines and explosive environments, ensuring safe operation.
Core components
Equipped with high-performance vacuum circuit breakers featuring excellent interrupting capacity and long service life.
Protection functions
Features multiple protections against short circuit, overload, undervoltage, leakage, and ground faults to ensure reliable equipment operation.
Environmental adaptability
Stable operation in high-humidity, high-dust harsh environments, meeting the demands of real mining conditions.
Flexible application
Suitable for 3.3kV to 10kV high-voltage power supply systems, providing power and protection for underground mine fans, pumps, and mining equipment.
Easy maintenance
Modular design with a rational layout enables easy installation, commissioning, and daily maintenance.
Standards and certifications
GB/T 12173
Standard for flameproof mobile substations for coal mines
MT/T 209
General technical conditions for high-voltage vacuum distribution equipment for coal mines
GB/T 1984 and GB/T 3906
Technical Requirements for High-Voltage Switchgear
GB 14048.2
Related specifications for low-voltage switchgear and controlgear
MT/T 451
Technical Requirements for Mining Flameproof Electrical Equipment
Technical Advantages
R&D cloud platform
Integrates electromagnetic optimization design, parametric drawing, performance analysis, structural optimization, and automatic drawing output for transformers, enabling shared transformer design resources and search, modification, and version control of all kinds of data.
Simulation Analysis
Flow field, temperature field, electric field, leakage magnetic field, wave process, and short-circuit force. The R&D and design of every product series are verified through flow field and temperature field simulation analysis to determine the winding average temperature rise and hot-spot temperature, ensuring product performance.
Smart O&M platform
By collecting key data such as transformer temperature, current, voltage, vibration, and grid harmonics, it enables online power quality analysis and fault alarms, and can be installed on mobile phones.
