The GN38-12 Series is an advanced Indoor Rotary High Voltage Isolating Switch specifically engineered for 12kVpower distribution systems where space efficiency is critical. Unlike traditional knife-gate switches, the GN38 utilizes a specialized rotary contact mechanism that allows for a much smaller installation footprint, making it the ideal choice for XGN15-12 Ring Main Units (RMU) and compact high-voltage switchgear.
Technical Specifications
| Parameter | Value |
|---|---|
| Rated Voltage | 12 kV |
| Rated Current | 400 / 630 / 1250 A |
| Short-Time Withstand Current | 25 kA / 4s |
| Lightning Impulse Withstand | 75 kV |
| Power Frequency Withstand | 42 kV |
| Mechanical Life | ≥ 2,000 operations |
| Installation | Indoor, panel-mounted |
| Actuation Type | Manual or electric motor |
| Standards | IEC 62271-102 |
Key Performance Advantages
Ultra-Compact Architecture: The rotary blade moves within its own axis, requiring zero vertical clearance for “swinging,” which allows for significantly shorter and narrower switchgear panels.
Superior Insulation Safety: High-strength epoxy resin insulators provide excellent creepage distance, ensuring stable operation in humid or dusty indoor environments.
High Conductivity: Silver-plated copper contacts ensure low resistance and minimal temperature rise even during continuous full-load operation.
Flexible Configuration: Available in standard and “D” models (with Earthing Switch) to meet various safety and interlocking requirements.
Direct Replacement: Often used as a high-reliability upgrade for GN30 series switches in modern power grid projects.
Applications
Withdrawable KYN28 switchgear units
RMU compartments requiring internal isolation
Indoor transformer and feeder panels
Medium-voltage motor control centers
Mining, urban substations, and compact GIS bays
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