GN22-12 High Current Indoor High Voltage Three-Phase Isolating Switch – 12kV 6300A AC Disconnector for Power System Line Conversion
The GN22-12 (C) (D) series is a robust indoor high-voltage disconnector engineered for power systems with a rated voltage of 12kV and below at AC 50Hz. This high-capacity isolating switch is specifically designed to carry currents up to 6300A, allowing for the reliable connection, disconnection, or conversion of lines under voltage but no-load conditions. Built with high-strength red insulators and a heavy-duty conductive frame, it offers flexible installation options for both the left and right sides of the unit. It is fully compatible with CS6-1 and CS6-2 manual operating mechanisms, as well as modern electric operating systems for automated control.
GN22-12 High Current Indoor High Voltage Three-Phase Isolating Switch (up to 6300A)
Product Overview
The GN22-12 (C) (D) series is a high-performance indoor high-voltage disconnector designed for power systems with a rated voltage of 12kV and below, operating at AC 50Hz. This heavy-duty isolating switch is specifically engineered to connect, disconnect, or convert lines under voltage but no-load conditions. It is an ideal solution for metal-enclosed switchgear, power stations, and transformer stations requiring safe circuit isolation during maintenance.
Core Features & Technical Advantages
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Superior Current Capacity: Engineered for heavy-duty industrial applications, supporting rated currents from 2000A up to 6300A (with models reaching up to 8000A).
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Advanced Structural Design: Utilizes a three-phase common bottom knife structure and a mechanical locking prototype for enhanced reliability.
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Wear-Free Contact Technology: Adopts a specialized two-step closing and contacting action that achieves wear-free contact, reducing maintenance needs and extending service life.
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Optimized Operation: Designed for a small operating force while maintaining high contact pressure and excellent dynamic thermal stability.
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Flexible Mechanism Installation: The matching operating mechanism can be conveniently installed on either the left or right side of the disconnector based on cabinet configuration.
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Universal Compatibility: Fully compatible with CS6-1 and CS6-2 manual operating mechanisms, as well as various electric operating systems for remote automation.
Technical Specifications
| Item | Unit | Data |
| Rated Voltage | kV | 12 |
| Rated Current Options | A | 2000, 2500, 3150, 4000, 5000, 6000, 8000 |
| 4-Second Thermal Stability Current | kA | 50 – 100 (depending on model) |
| Dynamic Stability Current (Peak) | kA | 100 – 250 (depending on model) |
Standard Working Conditions
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Ambient Air Temperature: Operational range from -15°C to +40°C (daily average $\le$ 35°C).
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Altitude: $\le$ 1,000 meters above sea level.
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Relative Humidity: Daily average≤95%; monthly average ≤ 90%.
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Seismic Resistance: Capable of withstanding earthquake intensities up to 8 degrees.
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Environmental Safety: Installation sites should be free from fire, explosion hazards, chemical corrosion, and severe vibration.
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