KENJING Isolation Circuit Breaker Switch Under the Environmental Protection Cabinet

The KENJING isolation unit integrates a vacuum circuit breaker inside a sealed environmental protection cabinet for feeder switching, isolation, and earthing in compact MV substations and RMUs. This vacuum circuit breaker is rated 12 kV, 630 A, with 20 kA/4 s or 25 kA/3 s thermal stability, 50/63 kA making and peak withstand, and 10,000 mechanical operations. Dielectric margins include 42/48 kV power-frequency and 75/85 kV impulse withstand. With ≤ 60 µΩ main path resistance and a 1.25 bar gas box, the vacuum circuit breaker cabinet delivers low-loss operation and reliable insulation in harsh environments—ideal wherever a 12kV vacuum circuit breaker or medium voltage vacuum circuit breaker solution is required.

Key Features and Advantages

• MV duty, compact form – 12 kV, 630 A vacuum circuit breaker for distribution feeders and sectionalizing in RMUs/cabinets.

• Fault performance – Breaking/thermal stability 20 kA/4 s or 25 kA/3 s; short-circuit making 50/63 kA; peak withstand 50/63 kA; 30 short-circuit closing operations validated.

• Dielectric strength – PF withstand: 42 kV (to ground/phase-phase), 48 kV (across contacts); LIWV: 75/85 kV, supporting overvoltage resilience.

• Endurance – Arc chamber 10,000 ops; isolating/earthing switch 5,000 ops; the vacuum circuit breaker mechanism is engineered for low maintenance.

• Low loss – ≤ 60 µΩ main circuit resistance limits I²R heating and improves thermal headroom.

• Environmental protection cabinet – 1.25 bar gas box; sealed enclosure enhances reliability against dust, humidity, and corrosive atmospheres; a robust vacuum circuit breaker cabinet for outdoor or indoor substations.

• Operator safety – Independent isolation and earthing functions with clear sequences around the vacuum circuit breaker.

Why Choose Us (KENJING)

• Engineer-led design focused on grid-code compliance and lifecycle cost.

• Documented type testing for dielectric and short-circuit duties.

• Configurable controls – interlocks, CT/VT options, and protection/SCADA interfaces.

• Global support – sizing, drawings, commissioning guidance, and spares.

Increase feeder reliability with a sealed vacuum circuit breaker cabinet built for endurance and safety. Contact KENJING for drawings, pricing, and a configuration matched to your scheme.