Product introduction：

The LW36-126(145)(W) circuit breaker is a cutting-edge electrical device designed for versatile applications in power systems. Suitable for single-phase operation, three-phase electrical linkage, and three-phase mechanical linkage, this breaker is optimized for grid frequencies of 50/60Hz in both neutral-grounded and neutral-ungrounded systems. It excels in demanding scenarios, featuring C2-level capabilities for back-to-back capacitor bank switching, no-load line-charging breaking, and no-load cable-charging breaking—meeting the highest international standards for reliability and performance.

Suitable for single-phase/three-phase (electrical/mechanical) operation in 50/60Hz grids (neutral-grounded/ungrounded systems). Meets C2-level standards for back-to-back capacitor bank, no-load line/cable switching.

Features

• Arc Extinguishing: SF6 gas + self-energy technology for low power consumption, 40kA short-circuit breaking (22x consecutive without maintenance).

• Mechanism: Spring actuating system with 10,000-cycle mechanical life (M2 class), low noise (<65dB), and compact design (30% smaller than traditional models).

Reliability:

• Seismic: Complies with IEEE693-2018 1.0g and ETG Chile standards.

• Insulation: Creepage distance >31mm/kV, operates at ≤3000m altitude, anti-pollution design.

• Sealing: SF6 annual leakage rate <0.5%, strict dehumidification (moisture content below industry norms).

Materials:

• Zinc-base alloy valve plates for stable gas dynamics.

• Imported PTFE spouts with high ablation resistance.

• Stainless steel mechanism cases + hot-galvanized fasteners for corrosion resistance.

Maintenance: ≥10-year maintenance-free cycle, 25,000+ global installations, optional phase closing device.

Specifications

• Voltage: 126kV (145kV withstand).

• Current-carrying: Passed 3780A temperature-rise test with safety margins.

• Environment: -30°C to +70°C, IP65 protection.

Standards: IEC 62271-100, GB 1984, DL/T 402.

Main technical parameters

Instructions on placing orders  : 

• Model and format of the circuit breaker.

• Rated electrical parameters (voltage, current, breaking current, etc).

• Working conditions for using (environment temperature, altitude, and environment pollution level).

• Rated control circuit electrical parameters (Rated voltage of energy-store moter and Rated voltage of opening, closing coil).

• Names and quantities of spare items needed, parts and special equipment and tools (to be otherwise ordered).

• The wire connecting direction of the primary upper terminal.

What are the performance characteristics of the canister circuit breaker？

High Insulation Performance：

• High Insulation Performance: Whether using sulfur hexafluoride (SF6) gas or insulating oil as the insulating medium, tank-type circuit breakers possess a high level of insulation. They can withstand system operating voltages and various overvoltages, ensuring the safety of both equipment and personnel.

Strong Arc-Quenching Capability：

• Strong Arc-Quenching Capability: The special design of the arc quenching chamber and the arc-quenching medium enable tank-type circuit breakers to rapidly extinguish arcs when interrupting short-circuit currents. This reduces the burn damage to the contacts, extends the electrical life and interrupting performance of the circuit breaker, and lowers the downtime and maintenance costs associated with faults.

Good Environmental Adaptability：

• Good Environmental Adaptability: The enclosed tank structure provides excellent resistance to contamination, moisture, and windblown sand. This allows the circuit breaker to operate stably in various geographical environments and climatic conditions, making it suitable for outdoor substations, industrial and mining enterprises, and other locations.