Secondary Switchgear Cabinet
LQXGN2-10 Secondary HV Switchgear: Reliable 12kV Power Distribution
Structural Design
Based on KN28-1 standard cabinet with protective metallic mesh screens, this switchgear integrates:
Spring-operated vacuum contactors
Dual-winding instrument transformers
Manual close/open switching mechanism
Isolating switches with visible break points
System Specifications
| Parameter | Value |
|---|---|
| Rated Frequency | 50Hz |
| Protective Features | Metallic mesh barriers, visible isolation |
| Control Mechanism | Manual operation + spring-assisted drive |
Component Specifications
Vacuum Contactor
Rated Voltage: 12kV
Rated Current: 630A
Breaking Capacity: 16kA
Operating Mechanism: Spring
Voltage Transformer
Type: Casting Resin / Full Insulation
Rated Voltage: 10kV
Ratio: 10kV/100V/100V (dual secondary)
Accuracy Class: 0.5
Current Transformer
Type: Casting Resin
Rated Voltage: 10kV
Ratio: 100A/5A/5A (dual secondary)
Accuracy Class: 0.5
Auxiliary Switch
Rated Voltage: 12kV
Rated Current: 100A
Key Operational Features
Manual Switching: Local control via mechanical handle
Visible Isolation: Physical disconnection verification
Dual Instrumentation: Simultaneous metering & protection signals
Arc Containment: Metallic mesh prevents arc propagation
Industrial Applications
Factory Power Distribution: Main secondary switchgear for 10kV incomers
Renewable Energy Plants: Wind/solar farm collection substations
Mining Operations: Underground power distribution centers
Infrastructure Projects: Tunnel ventilation system power control
Safety & Compliance
Designed to IEC 62271-200 standards with:
Visible earthing points
Mechanical interlock between isolator and contactor
Dielectric strength tested at 28kV AC for 1min
Maintenance Protocols
Annual contact resistance measurement (<60μΩ)
3-year timing test for spring mechanism
5-year dielectric verification per IEC 60480
