Metal Clad Switchgear (ABB Cooperative Product) UniGear-ZS1 12/24KV MV Switchgears. 1. General:.Easy and effective anti-maloperation locking device to avoid false operation;.Can be equipped with VS1-12(ZN63A), VD4, ZN12, 3AH, VB2 and VEP vacuum circuit breakers, VC7 vacuum contactor, etc.;.Can be equipped with PT handcart, metering handcart, isolating handcart, fuse handcart, and handcart of the ...