Outdoor Disconnector
27 April, 2026
Engineered to provide a clear, visible physical break in the circuit. Our isolators ensure absolute safety for maintenance crews operating on switchgear and outdoor substations.
A Disconnector Switch (or Isolator) is a mechanical switching device that provides a safe, visible physical break in a circuit when in the open position.
Crucial Difference: Unlike Circuit Breakers or Load Break Switches, Disconnectors have NO arc-quenching capability. They must NEVER be used to make or break load currents. They are strictly operated under “No-Load” conditions to isolate equipment after the circuit breaker has successfully interrupted the power.
Switchgear Integration
GN Series isolators designed for installation inside metal-enclosed switchgear (e.g., XGN cabinets). Features epoxy resin post insulators, optional integrated earthing switches, and compact phase-to-phase spacing.
Substation & Overhead Lines
GW Series rugged isolators for outdoor substations and pole-mounted applications. Built with high-creepage porcelain or silicone rubber insulators, engineered to withstand heavy ice, high winds, and severe pollution.
Provides an indisputable visual confirmation that the circuit is de-energized. The physical distance between the separated copper contacts is meticulously calculated to withstand severe lightning impulse voltages.
Available with integrated earthing switches. A foolproof mechanical interlock ensures the earth switch can only be closed when the main disconnector is fully open, strictly preventing deadly short circuits.
Equipped with robust hand-crank mechanisms for standard operation, or upgradeable to motor drives (AC/DC) for remote SCADA integration and automated substation control.
| Specification Criteria | Indoor Series (GN Type) | Outdoor Series (GW Type) |
|---|---|---|
| Primary Application Environment | Inside Metal-Enclosed Switchgear | Substations, Overhead Pole Lines |
| Insulator Material | Epoxy Resin Post Insulators | Porcelain / Silicone Rubber (Polymer) |
| Weather Protection Rating | IP2X (Relies on Cabinet) | IP54+ (Anti-Ice, Anti-UV) |
| Creepage Distance | Standard Indoor | High (≥ 25mm/kV to ≥ 31.5mm/kV) |
| Typical Linkages | Switchgear Door Interlocks | Substation Grounding Grid Interlocks |
Opening a disconnector under a live load current is extremely dangerous. Because it lacks an arc-quenching chamber, pulling the contacts apart under load will draw a massive, uncontrolled electrical arc in the open air. This can lead to a catastrophic phase-to-phase short circuit, destroying equipment and severely injuring the operator. Always trip the circuit breaker first.
Yes, as a supplier to panel builders, we understand switchgear dimensions vary. We offer customizable phase-to-phase distances (e.g., 150mm, 210mm, 250mm, 275mm) to perfectly align with the busbar configuration of your specific switchgear cabinet.
For outdoor GW series, we offer Single-Column, Double-Column (Center Break), and Three-Column (Double Break) configurations. They can be operated via a manual CS mechanism box installed at ground level, or a motorized CJ mechanism box for remote operation.
Submit your requirements on a business day, and our engineers will provide an initial OEM proposal within 24 hours.
