Column-type SF₆ circuit breakers are high-voltage switching devices that use SF₆ gas as an arc-quenching and insulating medium. They are designed to quickly and reliably interrupt short-circuit currents and protect power lines, transformers, substations, and other critical equipment.

Thanks to the high electrical strength of SF₆ and the vertical column design, these circuit breakers offer a compact footprint, high mechanical stability, minimal losses, and stable operation even under harsh climatic conditions.

Applications of SF₆ Column-Type Circuit Breakers

Protection of high-voltage networks against fault conditions.

Interrupting high short-circuit currents.

Switching of lines, transformers, busbars, and substation sections.

Operation in open and enclosed switchgear.

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

Minimum and maximum technical specifications (general ranges)

Voltage class: 35 kV – 145 kV – 252 kV and above (confirmed by images of the LW36‑40.5, LW8‑40.5, 145 kV, and 220 kV models)

Breaking current: 20–40 kA (typical values for SF₆ circuit breakers based on ABB and Hitachi industrial models)

Design types:

outdoor pillar-type;

dead-tank and live-tank designs;

pneumatic, pneumatic-piston (puffer), and self-blast.

Gas system: SF₆ at a pressure of 0.4–0.8 MPa (range confirmed by technical sources on SF₆ circuit breakers)

Installation: outdoor substations, 35–330 kV distribution substations, industrial power facilities.

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

What We Can Supply and Provide

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

We design high-voltage substations and switching schemes, integrating circuit breakers into the overall power supply system.

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.