SIEBREAK and SIEBREAK-VCB

Why SIEBREAK and SIEBREAK-VCB?

SIEBREAK and SIEBREAK-VCB are modular interrupter switchgear for medium-voltage circuit protection. Deploy them in standalone bays, transformer primaries or various lineup configurations.

Siemens SIEBREAK metal-enclosed interrupter switchgear design is a modular product available in switch and fuses configuration assembled and fully integrated both mechanically and electrically to provide medium-voltage circuit protection. All components are fully tested to perform in accordance with Siemens' standards for reliability, quality, and service.

SIEBREAK-VCB reduces arc-flash incident energy to 2.1 cal/cm² with a 60 ms interruption to keep your environments safe. Vacuum interrupters deliver reliable switching to extend product lifespan and minimize downtime. The modular design simplifies installation and adapts to your needs.

Key benefits

Reduce arc-flash hazards

Reduce arc-flash incident energy in low-voltage applications with our interruptor switchgear. Provide primary and secondary bus protection to mitigate arcing faults. Improve electrical safety to meet NFPA 70E.

Provide medium-voltage protection

Achieve reliable medium-voltage circuit protection with SIEBREAK and SIEBREAK-VCB switchgear. Rely on components tested for quality. Get visible disconnect from the load-interrupter switch and dependable vacuum breaker protection.

Use adaptable systems configurations

Use the switchgear’s modular design for flexible distribution needs. Configure for standalone bays, transformer primary or lineups: main-tie-main and automatic transfer. Adapt with single and duplex switch types.

Featured capabilities

A door is open, revealing a dark room with a light source on the left side.

Fused and unfused configurations

Supplied in the unfused configuration, short-circuit protection is not available - only load-current interruption. Supplied fused or unfused, a load-interrupter switch is different from a vacuum circuit breaker in that it will interrupt load current, but not overload or fault currents.

A blown fuse with a broken wire and a warning sign indicating the danger of electric shock.

Fuse monitoring system

The fuse monitoring system provides various options including blown fuse indication and single-phase protection for safe and fast options to detect a blown fuse condition.

A diagram of a vacuum interrupter with a key visual representation of its components.

Vacuum interruptors

The hermetically sealed vacuum contact gap keeps switching characteristics of the interrupters constant throughout their lifecycle. Expect reliable switching in challenging conditions for up to 30,000 cycles.