Vacuum Circuit Breakers Manufacturer for Reliable Power Distribution

Built around a pole-mounted structure, the 12kV Outdoor Pole-Mounted Vacuum Circuit Breaker from Dongfa Intelligent is configured for outdoor medium-voltage switching without relying on an indoor breaker adapted for external installation. It combines 630A/1250A rated current, 16kA/20kA short-circuit breaking capacity, and a 30,000-operation mechanical life, with 42/48kV power-frequency and 75/85kV lightning impulse withstand levels. The configuration can be matched to utility, industrial, mining, and other outdoor distribution systems.

For indoor 12kV medium-voltage switchgear, the 12kV Indoor Three-Position Vacuum Circuit Breaker combines circuit breaking, isolation, and earthing functions within one operating arrangement. Dongfa Intelligent manufactures this three-position VCB with 630A/1250A rated current and 20/25/31.5kA short-circuit breaking capacity. The design also provides 42/48kV power-frequency withstand and 75/85kV lightning impulse withstand, with position and interlocking configurations confirmed according to switchgear requirements.

Dongfa Intelligent is a professional 40.5kV Indoor High Voltage Vacuum Circuit Breaker manufacturer supplying overseas buyers with factory-direct pricing. This indoor VCB offers 1250/1600/2000A, 25/31.5kA, ≤80ms opening time, and 10,000 operations. With capacitor bank switching capability and AC/DC 110V/220V control options, it suits switchgear retrofit and new projects. Request a quote today.

Dongfa Intelligent supports project sourcing and technical selection of the 24kV Indoor Vacuum Circuit Breaker for indoor medium-voltage power distribution systems. The product is designed for 24kV, 50Hz applications and provides multiple rated current configurations for different system loads. Its technical parameters include 20kA, 25kA and 31.5kA short-circuit breaking current, defined insulation levels for phase-to-phase, phase-to-earth and vacuum interrupter, and 10,000-operation mechanical life. It can be evaluated for power distribution, power plants, mining and industrial applications according to project requirements. Model：3(VS1)-24 Key Specifications：24kV · 50Hz · 630–3150A · 20–31.5kA · 10,000 Operations

12kV Indoor Side-Mounted Vacuum Circuit Breaker from Dongfa Intelligent, a specialized manufacturer, supports project procurement, technical selection, and customized production for 12kV indoor medium-voltage power distribution systems. It has a rated current of 1250A and provides 20kA, 25kA, and 31.5kA short-circuit breaking current options. The product supports AC/DC 110V and 220V control voltages, with 42kV power frequency withstand voltage, 75kV lightning impulse withstand voltage, and a rated mechanical life of 1000 cycles. It is suitable for power distribution, power plants, mines, industrial enterprises, and corresponding medium-voltage switchgear systems.

Dongfa Intelligent provides project sourcing and technical selection of the 12kV Indoor Embedded Pole Vacuum Circuit Breaker, designed for compact and reliable indoor medium-voltage power distribution systems. The ZN63(VS1)-12 integrates the vacuum interrupter into an embedded pole structure to provide stable insulation and a more compact switching assembly. With rated current options from 630A to 4000A, short-circuit breaking capacity up to 40kA, and flexible switchgear integration, it is suitable for utilities, power plants, mining and industrial applications. Model: ZN63(VS1)-12 Parameters: 12kV |630A–4000A |20/25/31.5/40kA