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The LW36-126 SF6 Circuit Breaker is a high-performance outdoor switching device designed for 126kV transmission substations, power utilities, and industrial electrical networks. Based on advanced SF6 gas insulation and self-blast arc extinguishing technology, this breaker provides reliable fault interruption, stable mechanical operation, and long service life under demanding grid conditions.
Designed for high voltage applications, the LW36-126 combines compact structure, low operating energy requirements, and excellent dielectric recovery performance. It is widely applied in transmission lines, transformer protection systems, busbar switching, and renewable energy substations where safe and rapid fault clearing is essential.
As a specialized 126KV SF6 Circuit Breaker, the LW36-126 provides a proven solution for utilities requiring reliable outdoor operation, low maintenance requirements, and compliance with international high voltage standards.
Unlike conventional high voltage breakers that require complex maintenance procedures, the LW36-126 adopts a self-blast interrupter design that optimizes gas flow during arc extinction. The structure reduces mechanical energy consumption while maintaining excellent breaking performance during both normal switching and severe short-circuit conditions.
The LW36-126 uses a compact single-break SF6 interrupter structure with optimized electric field distribution. During interruption, the self-blast system generates high-pressure gas flow through the arc zone, rapidly restoring insulation strength and safely clearing fault current.
The sealed pole design protects internal components from external contamination, while temperature-compensated SF6 density monitoring provides continuous condition supervision. The operating mechanism is engineered for reliable performance in extreme climates, including cold regions and high-altitude substations.
Each breaker is factory assembled and tested before delivery, including mechanical operation verification, insulation testing, contact resistance measurement, and short-circuit performance validation according to international standards.
| Parameter | Specification |
|---|---|
| Rated Voltage | 126 kV |
| Rated Frequency | 50 / 60 Hz |
| Rated Normal Current | 2000 A / 3150 A |
| Rated Short-Circuit Breaking Current | 31.5 kA / 40 kA |
| Rated Short-Time Withstand Current | 31.5 kA / 40 kA (3s) |
| Rated Peak Withstand Current | 80 kA / 100 kA |
| SF6 Gas Pressure (20°C) | 0.6 MPa |
| Operating Mechanism | Spring operating mechanism / Hydraulic mechanism |
| Mechanical Endurance | 10,000 CO operations |
| Ambient Temperature | -40°C to +40°C |
| Applicable Standards | IEC 62271-100, ANSI C37 Series |
The LW36-126 is designed for critical high voltage applications where reliability and switching performance directly influence grid stability.
As an experienced SF6 circuit breaker manufacturer, we provide complete technical support from product selection and engineering consultation to installation guidance and after-sales service.
Every LW36-126 unit undergoes strict factory inspection before shipment, including insulation withstand tests, mechanical endurance verification, timing measurement, and SF6 sealing inspection.
Customization options include control voltage configuration, current transformer integration, terminal arrangement, communication interfaces, and project-specific installation requirements.
What is the LW36-126 SF6 Circuit Breaker used for?
The LW36-126 is mainly used in 126kV transmission substations for line protection, transformer switching, and high voltage fault interruption.
Why use SF6 technology in the LW36-126?
SF6 provides excellent insulation strength and arc extinguishing capability, allowing compact design and reliable high voltage switching performance.
How long is the service life of LW36-126?
With proper maintenance, the breaker is designed for decades of reliable operation with mechanical endurance exceeding 10,000 switching cycles.
