Circuit Breaker (OVCB up to 765 kV)

Oil Circuit Breakers (OVCB) up to 765 kV are designed for extra high voltage (EHV) power systems, where reliable fault interruption and system protection are critical. These circuit breakers use insulating oil as the arc-quenching medium, effectively extinguishing electrical arcs generated during switching operations and ensuring safe disconnection of fault currents.

OVCBs are widely used in high-voltage substations and transmission networks, where they play a crucial role in protecting transformers, transmission lines, and other critical equipment from damage caused by overloads, short circuits, and electrical faults. Their ability to handle extremely high voltage levels up to 765 kV makes them suitable for large-scale power distribution and grid infrastructure.

The design incorporates high dielectric strength insulation, efficient arc extinction mechanisms, and durable components that ensure consistent performance under demanding operating conditions. These breakers are built to withstand environmental stress, including temperature variations, humidity, and outdoor exposure, making them reliable for long-term use in utility applications.

In addition to OVCBs, modern switchgear systems may also include SF6 circuit breakers, load break switches, isolators, disconnectors, and earthing switches, forming a complete protection and switching solution for high-voltage networks.

With their high breaking capacity, operational safety, and proven performance, OVCBs remain a vital part of electrical transmission systems, supporting stable and uninterrupted power flow across large-scale infrastructure projects