GN22-12/C Indoor Isolator Switch for 12kV Applications

High-Performance Disconnector for Safe Substation Isolation

The GN22-12/C indoor isolator switch is a critical component for safe maintenance and reliable operation in indoor AC power systems with a rated voltage of 12kV and a frequency of 50Hz. Widely used in power stations, substations, switchgear, and industrial facilities, this model provides visible isolation, robust mechanical interlocking, and a compact design for operator safety.

Its horizontal rotary mechanism and high-insulation properties ensure smooth and reliable operation. With multiple mounting options and compatibility with various switchgear types, the GN22-12 is the ideal solution for both new installations and retrofitting projects, guaranteeing operational safety and a long service life.

Key Features & Benefits

Reliable Isolation: Provides a clear break point for maximum operator safety.
Robust & Durable: Built with a solid rotary mechanism and strong components for high mechanical endurance.
Flexible Installation: Supports multiple mounting types (wall-mounted or pedestal-installed) and optional earthing switches.
Compact Design: Optimized for space-constrained switchgear panels.
High Insulation Level: Porcelain or composite insulator options for enhanced electrical integrity.

GN22-12/C Indoor Isolator Switch for 12kV Applications

Core 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

GN22-12/C Indoor Isolator Switch for 12kV Applications

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.

Customer Success Stories

Here's what our customers are saying about our GN22-12 switch.

⭐⭐⭐⭐⭐ “The GN22-12 isolator switch was easy to install and performed flawlessly in our 12kV motor control center upgrade.” — Patrick W., Electrical Supervisor, Canada
⭐⭐⭐⭐⭐ “We needed a compact disconnector for our mining facility’s indoor transformer bay. This unit delivered excellent insulation and mechanical safety.” — Johan B., Plant Engineer, South Africa
⭐⭐⭐⭐ “Used this model in a solar inverter station with indoor panels. Reliable and well-supported by the manufacturer.” — Laura T., Utility Consultant, Australia
⭐⭐⭐⭐⭐ “Compared to the GN19 series, the GN22 offered better interlocking and mounting flexibility.” — Carlos M., Substation Technician, Spain
⭐⭐⭐⭐ “Its performance exceeded expectations during commissioning tests—especially under short circuit conditions.” — Ethan R., Grid Commissioning Lead, UK