Details: 11kv compact substation (css) shall be a type-tested, metal-enclosed prefabricated substation suitable for outdoor installation. it shall house an 11kv ring main unit (rmu), distribution transformer, and low voltage (lv) switchboard in a compact, weatherproof, tamper-proof enclosure comply with standard or relevant is of components ,parameter specification:-system voltage (hv) 11kv, 3-phase, 50hz,transformer rating [specify: 500 kva],hv switchgear sf6 or vacuum insulated rmu,lv voltage output 433 v, 3-phase, 4-wire cooling type onan (oil natural air natural)degree of protection ip54 for enclosure,installation location outdoor (pad-mounted / plinth-mounted),ambient temp range -5°c to +50°c 1. major components-1.1 high voltage compartment (rmu):type-tested rmu, sf6 or vacuum insulated, rated voltage: 12kv,rated current: 630a,short-time withstand: 20ka for 3 sec,protection: feeder protection relay with metering,manual or motorized operation 1.2 transformer compartment:type: hermetically s
Sector: Water supply and Sewerage