GET A CONSULTATION -

HIGH VOLTAGE CIRCUIT BREAKERS 72.5 kV to 1100 kV

/ High Voltage Circuit Breakers

Reliable Switching. Powerful Protection.

High-voltage circuit breakers are critical switching and protection components for substations, transmission networks and high-voltage electrical installations.

Designed to control electrical circuits and interrupt fault currents, circuit breakers combine high dielectric performance, current interruption capability and reliable mechanical operation within a single high-voltage switching system.

The technical portfolio covers high-voltage applications extending from 72.5 kV to 1100 kV, with rated currents and interruption characteristics for demanding transmission and substation applications.

Request a Quote

/ Engineered to Interrupt

High Performance When It Matters Most

Unlike a disconnector, a high-voltage circuit breaker is designed to perform switching and interruption duties within an energized electrical system.

The represented portfolio includes SF6 circuit-breaker technologies together with different mechanical operating systems and equipment configurations for high-voltage substations.

Switching Performance

Designed for controlled opening and closing of high-voltage electrical circuits.

Fault Current Interruption

Circuit-breaker configurations in the catalogue provide short-circuit interruption capabilities for demanding transmission applications.

Dielectric Performance

Equipment insulation levels are coordinated with the voltage class and requirements of the installation.

Reliable Operation

Mechanical operating systems are designed around the switching requirements of high-voltage networks.

Request a Quote

/ Switching Technology

Designed for High-Voltage Interruption

The catalogue includes SF6 circuit breakers for high-voltage and ultra-high-voltage applications.

Different equipment configurations are available depending on voltage level, switching duty and substation architecture.

Live-Tank Solutions

High-voltage switching configurations for conventional outdoor substations are represented within the portfolio.

Dead-Tank Solutions

The catalogue includes tank-type circuit breakers across high and extra-high-voltage classes.

Integrated Solutions

Integrated arrangements combining circuit-breaker, disconnector and earthing-switch functions are also represented in the catalogue.

Request a Quote

/ High-Voltage Performance

Built for Transmission-Class Applications

The circuit-breaker portfolio represented in the technical catalogue covers a broad range of electrical characteristics.

72.5 to 1100 kV

Voltage Range

The represented circuit-breaker and integrated switching solutions extend from 72.5 kV through ultra-high-voltage applications up to 1100 kV.

Up to 6,300 A

Rated Current

High-current configurations in the portfolio extend to 6,300 A.

Up to 63 kA

Short-Circuit Current

The technical portfolio includes configurations with short-circuit current ratings extending to 63 kA.

Up to 160 kA

Peak Current

Peak current capabilities across the represented circuit-breaker configurations extend to approximately 160 kA.

/ Built for Demanding Environments

Reliable Operation Beyond Electrical Ratings

High-voltage circuit breakers operate as part of critical substation infrastructure and may be exposed to demanding environmental conditions throughout their service life.

The catalogue includes products specified for temperatures from approximately-40°C to +50°C, together with configurations intended for pollution and challenging climatic conditions.

Mechanical configurations and operating systems vary according to the selected voltage class and circuit-breaker arrangement.

/ IEC Standard

International Standards for High-Voltage Circuit Breakers

IEC 62271 Series

High-Voltage Switchgear and Controlgear

The IEC 62271 series provides the international standards framework relevant to high-voltage switching and control equipment.

IEC 62271-100

Alternating Current Circuit Breakers

This is the primary IEC product standard I recommend showing on the circuit-breaker page.