VF (R)-12 [FZ (R)N with draw out vacuum load switch and its combined electrical apparatus are independently designed, developed by this company. It is small-sized, compact structure
VF (R) are stable, long live, high numbers of rated drop-out current, strong ability of breaking and making, easy maintenance
The vacuum interrupter is insulation coated, and thus the switch is pollution free, explosion free, low noise, high insulation level, less maintenance, which is applied to the frequently operated working condition.

Unique design of the combined electrical apparatus and the three-phase fuse is installed on the top of the load switch, Load switch and combined electrical apparatus (with draw out handcart unit), which match the VS1, VD4, ZN21, applied to KYN44, GZS1, KYN28 and other with draw out HV cabinets Vacuum load switch and combined electrical apparatus can be manually or electrically operated. Sequence of closing: Closing spring stored-energy release (opening spring pre-stored)-closing; Sequence of opening: Opening spring energy release-opening

Two drop-out mode:
1. Fuse impact operation: When break the load current, the relay protection action instruct the magnetic release vacuum load switch;
2. Magnetic release operation: When short circuit, the mechanical system open the fuse; Fuse is just as the backup short circuit protection.
Vacuum circuit breaker interrupter, rated current 630A, rated short circuit drop-out current 20KA
Vacuum load switch-fuse combined electrical apparatus can effectively protect the transformer.