SF₆ gas-insulated tank circuit breakers are high-voltage switching devices in which the arc-extinguishing chamber and main components are housed inside a sealed tank filled with SF₆ gas. This design ensures high electrical strength, stable performance, and long-term operation even under harsh climatic conditions.

Dead-tank circuit breakers are widely used in outdoor substations, high-voltage networks, and industrial power complexes where maximum reliability and resistance to external influences are required.

Applications of SF₆ tank-type circuit breakers

Protection of high-voltage networks against short-circuit currents.

Switching of lines, transformers, and busbar sections.

Operation in outdoor substations rated 35–800 kV.

Ensuring stable operation of the power system and reducing the risk of accidents.

Use in industrial and power-generating facilities.

Minimum and maximum technical specifications (general ranges)

Voltage class: 72.5 kV, 126 kV, 145 kV, 252–363 kV, 550 kV, up to 800 kV (confirmed by images of models LW36‑126, LW30A–550, 252–363–550–800 kV)

Breaking current: 20–40 kA (typical values for SF₆ dead-tank circuit breakers)

Rated current: 2,000–5,000 A (depending on the series, confirmed by models 2,000A–3,150A–5,000A)

Design types:

dead-tank,

with integrated current transformers,

with anti-pollution insulators,

with pneumatic piston or self-blowing arc-extinguishing systems.

Gas system: SF₆ at a pressure of 0.4–0.8 MPa

Installation: outdoor (open-air substations), on metal frames or foundation slabs.

Resistance: to UV radiation, contamination, low temperatures, and vibrations.

What we can supply and provide

We supply tank-type SF₆ circuit breakers of any brand—we select the optimal solution based on the facility’s technical requirements.

We design high-voltage switching nodes, integrating circuit breakers into substation schematics.

We perform configuration, installation, commissioning, and maintenance.

We provide a warranty covering all stages—from equipment selection to commissioning.

Warranties and Liability

We ensure that the equipment complies with international standards, monitor the quality of deliveries, and guarantee the stable operation of circuit breakers within high-voltage systems. Each stage is backed by an official warranty and technical support.