The GW1-12FR Series is an outdoor high-voltage pole-mounted load break switch (LBS) designed for 12kV, 50Hz three-phase power systems. Unlike standard disconnectors, the GW1-12FR is engineered to make and break load currentsand over-currents.
The “R” designation indicates a built-in high-voltage current-limiting fuse, providing essential short-circuit protection for transformers and distribution lines. Constructed with high-strength anti-pollution porcelain insulators and silver-plated copper contacts, this unit ensures a long service life and high reliability in harsh outdoor environments. It provides a visible atmospheric gap when open, fulfilling the safety requirements for downstream maintenance.
Key Features
Dual Current Ratings: Available in both 630A and 200A models to support various feeder or branch applications.
Visible Break Design: Ensures operational safety and fault detection through clear visual confirmation.
Arc-Suppressing Contacts: Equipped with arc horns and magnetic blowout features for secure disconnection under load.
Weatherproof Insulation: Insulating supports and porcelain or polymer bushings ensure durability under rain, frost, and dust.
Manual or Motorized Options: Can be fitted with a manual lever or motor actuator for remote SCADA system integration.
Fast Installation: Comes with a standardized mounting bracket for quick pole-mounting with minimal labor.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | GW1-12FR |
| Rated Voltage | 12 kV |
| Rated Current | 630A / 200A |
| Rated Short-Time Current | 20 kA (1s) |
| Power Frequency Withstand | 42 kV (1 min) |
| Lightning Impulse Withstand | 75 kV |
| Insulation Type | Porcelain / Polymer |
| Installation Mode | Pole-mounted |
| Operating Mechanism | Manual / Optional Motor |
| Standard Compliance | IEC 62271-102 / GB 1985 |
Applications
Transformer Protection: Ideal for the primary side of distribution transformers to provide load switching and short-circuit protection.
Ring Main Units (RMU): Used as a cost-effective outdoor alternative for branch circuit control.
Industrial Feeders: Controlling and protecting high-voltage motor starters and capacitor banks.
Rural Power Grids: Sectionalizing lines where fault protection is required without the cost of a full circuit breaker.
Rural Power Networks: For sectionalizing long overhead lines to reduce fault impact.
Solar & Wind Farms: Isolates feeders from inverter clusters during maintenance.
Utility Distribution Systems: Ideal for tie-switch points or backup routes.
Substation Feeders: Enable safe de-energization during breaker replacement.
