Main technical parameters Name Unit Data Rated voltage kV 3.6 7.2 12 Rated frequency Hz 50 Circuit breaker rated current A 630 1250 1600 2000 2500 3150 Rated current of switchgear A 630 1250 1600 2000 2500 3150 Rated short-time withstand current (4s) kA 20 25 31.5 40 Rated peak withstand current (peak) kA 50 63 80 100 Rated short-circuit breaking current kA 20 25 31.5 40 Rated short circuit closing current (peak) kA 50 63 80 100 rated Insulation level 1min power frequency withstand voltage Between poles, poles to the ground kV 24 32 42 Between fractures kV 24 32 42 Lightning impulse withstand voltage (peak) Between poles, poles to the ground kV 40 60 75 Between fractures kV 46 70 85 Class of protection The enclosure is IP4X, and the compartment and circuit breaker room doors are IP2X when opened. Overall dimension Hight 2300 Width Rated current 1250A and below 800 Rated current 1600A and above 1000 Depth Cable inlet and outlet 1500 Overhead inlet and outlet line 1660