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Medium Voltage Switchgear / Metal-Clad Withdrawable Switchgear
KYN28-12 Metal-Clad Withdrawable Switchgear (12 kV)
Air-insulated, metal-clad withdrawable switchgear for indoor 3.6–12 kV, three-phase 50 / 60 Hz single-busbar and sectionalized-busbar systems — HARRL's workhorse MV cabinet and the most widely deployed model in the range. The enclosure is divided into four independent compartments (busbar, circuit-breaker, cable and low-voltage), each fitted with a pressure-relief channel for arc venting, and a five-prevention mechanical interlock guards against misoperation. Accepts VS1 / ZN63A-12 (or equivalent) withdrawable vacuum circuit breakers; supports wall-mount and back-to-back arrangements.
Key Specifications
StandardsIEC 62271-200 / -100 (ref. GB 3906-2006, DL/T 404)
Insulation Voltage12 kV
Rated Frequency50 Hz
Busbar Rated Currentup to 5000 A
Power-frequency Withstand (1 min)42 kV
Product Features
- Four-compartment metal-clad design with pressure-relief venting
- Internal arc-fault containment (40 kA / 1 s)
- IK10 impact protection
- Five-prevention mechanical interlock
- Withdrawable VCB handcart with test / service positions
- Distribution-automation ready