The GN22-12/C Series Indoor High Voltage Isolating Switch is a cutting-edge electrical component designed for power systems with a rated voltage of 12kV and AC 50/60Hz. It is primarily used to open and close circuits under no-load conditions, providing a visible safety gap for maintenance of busbars, circuit breakers, and other electrical equipment.

Key Features
Advanced Rotary Structure: Features a unique rotary contact design for enhanced breaking capacity and stability.
Superior Insulation: Utilizes high-strength epoxy resin insulators to ensure reliable performance in harsh indoor environments.
High Current Capacity: Available in rated currents of 630A, 1000A, and 1250A to suit various industrial needs.
Safety Interlock: Compatible with various operating mechanisms (Manual or Motorized) with integrated interlocking to prevent misoperation.
Compact Design: Space-saving footprint, ideal for installation in various types of high-voltage switchgear.
Technical Specifications
| Parameter | Value |
| Rated Voltage | 12kV |
| Rated Current | 400A / 630A / 1250A |
| Rated Frequency | 50Hz |
| Rated Short-time Withstand Current | 20kA / 25kA (4s) |
| Rated Peak Withstand Current | 50kA / 63kA |
| Power Frequency Withstand | 42kV / 48kV (1 min) |
| Lightning Impulse Withstand | 75kV / 85kV |
| Mechanical Endurance | ≥ 2,000 Operations (M2 class) |
| Operating Mechanism | Manual, Rotary Type |

Technical Documents & Certifications
- GB1985-2004 / IEC 62271-102
- ISO9001:2015 Quality Management
- Type test reports from an authorized Chinese national lab
💡 Expert Insight: The rated short-time withstand current (Ith) and rated peak withstand current (Ipk) are critical for safety. Our GN22-12’s high ratings ensure it can safely withstand the extreme mechanical and thermal stresses of a downstream short-circuit fault without deformation, protecting the entire switchgear system.
Application Scenarios
- Urban Substations: Requiring compact switchgear isolation.
- Power Generation Plants: For 12kV indoor switchgear panels.
- Industrial Facilities: With frequent maintenance operations.
- Retrofitting Projects: Replacing outdated or oil-insulated isolators.



