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Switching Substation

Item	Umit	Data
Rated voltage	kV	12
Rated frequency	Hz	50
Rated current of main busbar/maximum rated current of fuse	A	630,125
Rated short-time withstand current of main circuit and grounding circuit	kA/S	20,3
Rated peak withstand current of main circuit and grounding circuit	kA	50
Rated short-circuit closing current of main circuit and grounding circuit	kA	50
Full capacity breaking number of load switch	times	100
Circuit breaker breaking current	kA	31.5
Rated closed-loop breaking current	A	630
Rated transfer current	A	870
Mechanical lifespan	times	2000
1-minute power frequency withstand voltage (peak) relative to ground/isolation fracture	kV	42,48
Lightning impulse withstand voltage (peak value) phase to phase, ground/isolation fracture	kV	75,85
Secondary circuit 1-minute power frequency withstand voltage	kV	2
Protection level		IP3X

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