KYN28A-12 Indoor Metal-clad Enclosed Switchgear

Description KYN28A-12 indoor metal-clad enclosed switchgear is applied to 3-phase AC 50Hz/7.2-12kV single bus bar and single bus bar section electric power system, with the function of “five preventions”. It has perfect and reliable prevention function against misoperation. The removing compartment of the switchgear may be assembled with vacuum circuit breaker, vacuum contactor, load breaker switch and VT handcart, etc. The switchgear complies with the standards of IEC 60298, GB3906, and DL404. Technical specification ItemUnitDataRated voltage kV12 Insulation level Rated power-frequency withstand voltage(1min) kV42 / 48 (phase to earth / across open contacts) Rated lightening impulse withstand voltage kV75 / 85 (phase to earth / across open contacts) Rated frequency Hz50 / 60 Rated main bus bar current A630,1200,1600,2000,2500,3150,4000 Rated branching bus bar current A630,1250,1600,2000,2500,3150,4000* 4s Short-time withstand current(rms.) kA16, 20, 25, 31.5, 40 Peak withstand current(peak.) kA40, 50, 63, 80, 100, 125