GW4 Series Outdoor High Voltage AC Disconnect Switch – 12kV 40.5kV Three-Phase Outdoor Isolation Switch for Power Systems (50/60Hz)
The GW4-12(40.5) is a high-performance outdoor AC high-voltage disconnect switch engineered for power systems with a rated voltage of 12kV or 40.5kV. This robust isolation switch is specifically designed to open and close circuits under voltage but no-load conditions at frequencies of 50/60Hz. Built to withstand harsh outdoor environments, it features a dual-column structure with high-durability brown ceramic insulators and weather-protected contact points. The GW4 series fully complies with international and national standards, including IEC129-1984 and GB1985, ensuring reliable safety and operational stability for substations and electrical distribution networks.
GW4 Series Outdoor High Voltage AC Disconnect Switch (12kV / 40.5kV)
Product Overview
The GW4-12(40.5) series consists of outdoor AC high-voltage disconnect switches (isolation switches) engineered for power systems with rated voltages of 12kV or 40.5kV. These robust devices are designed to open and close circuits under voltage but no-load conditions at frequencies of 50/60Hz. The GW4 series is an essential component for substations and distribution networks, providing a visible safety gap during maintenance while adhering to international standards such as IEC129-1984 and GB1985.
Core Features & Technical Advantages
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Dual-Column Rotating Structure: Each pole consists of a pedestal and two insulating braces; the electric blades installed on top of each brace rotate horizontally 90 degrees to open or close the circuit.
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Synchronized Three-Pole Operation: Three single-pole disconnect switches can be connected into a linkage three-pole system through an interlink rod, ensuring synchronized performance across all phases.
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Weather-Resistant Insulation: Utilizes high-durability brown ceramic insulators with a “shutter” design to provide excellent dielectric strength and protection against environmental pollution.
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Flexible Earthing Options: Depending on specific safety requirements, users can choose between single earthing, dual earthing, or no earthing configurations.
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Versatile Operating Mechanisms: The switch can be matched with CS11 or CS17 type manual mechanisms, and motor-driven mechanisms can also be installed upon request.
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Durable Hardware: Built on a reinforced steel base with weather-protected contact points (red protective covers) to prevent environmental corrosion.
Technical Specifications
| Item | Unit | GW4-12 Data | GW4-40.5 Data |
| Rated Voltage | kV | 12 | 40.5 |
| Rated Current Options | A | 200, 400, 630, 1000, 1250 | 400, 630, 1000, 1250 |
| Withstand Current (Peak) | kA | 40 – 63 | 50 – 80 |
| 4s Short-time Withstand Current | kA | 16 – 25 | 20 – 31.5 |
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