The KENJING SF6 Vacuum Circuit Breaker Switch is a vacuum circuit breaker engineered for reliable fault interruption and compact GIS applications. Using vacuum interrupters for arc extinction and an SF₆-insulated housing for dielectric strength, this vacuum circuit breaker delivers secure clearing of short-circuits with low maintenance. It suits ring main units, metal-enclosed switchgear, and substation bays requiring a medium voltage vacuum circuit breaker with fast duty cycles and long mechanical life.
Key Features and Advantages
Rated current 1250 A — stable thermal performance for feeders and incomers; vacuum circuit breaker contacts minimize erosion.
Short-time withstand current 20/25 kA, 4 s — supports coordination with upstream protection; vacuum circuit breaker withstands thermal/mechanical stress for fault ride-through.
Peak withstand / making current 50 kA — high electrodynamic strength for bus tie and transformer feeders.
Standard operating sequence: O-0.3 s-CO-180 s-CO — fast auto-reclose sequence for network resilience; proven vacuum circuit breaker mechanism.
Compact, SF₆-insulated enclosure — GIS layout with sealed design reduces footprint and environmental ingress; suitable as an indoor vacuum circuit breaker in harsh sites.
Designed to your specification — we provide complete vacuum circuit breaker specifications, drawings, and accessory options (aux contacts, motor charge, anti-pump, interlocks) for easy integration.
Why Choose Us (KENJING)
Engineer-led configuration: Protection curves, CT/VT interfaces, and scheme logic sized by power system engineers to match your vacuum circuit breaker duty.
Manufacturing quality: Routine testing of each vacuum circuit breaker for dielectric, mechanical, and timing performance; traceable QC records.
Lifecycle support: Spares, retrofit kits, and onsite commissioning for vacuum circuit breaker fleets—short lead times and documented FAT/SAT.
CTA
Need a dependable vacuum circuit breaker for your GIS or metal-enclosed lineup? Contact KENJING for drawings, pricing, and a fast engineering review. We’ll return a matched vacuum circuit breaker configuration with verified coordination and delivery schedule.
NO | ITEM | UNIT | PARAMETERS | REMARKS |
1 | Rated Frequency | Hz | 50 | |
2 | Rated Current | A | 1250 | |
3 | Rated Short-Time Withstand Current | kA | 20/25 | |
4 | Rated Peak Withstand Current | kA | 50 | |
5 | Rated Short-Circuit Duration | s | 4 | |
6 | Rated Short-Circuit Making Current | kA | 50 | |
7 | Rated Operation Sequence | 0-0.3s-180s-co |
