Model Number: VS1-12/630 Brand Name: YUFLY Key Specifications/Special Features: 1: Effective Arc-extinguish2: Long electrical lifetime3: Maintenance free4: Safe and reliable operation5: Sealed spark chamberOperational:1: Fixed type or drawer type2: Phase distance: 150/210/275mm Item Unit Data Rated voltage kV 12 Rated current A 630 Rated short circuit breaking current kA 20 Rated short circuit making current kA 50 Rated short time withstand current kA 20 Rated short circuit duration time s 4 1 min P.F withstand voltage kV 42 Lightning impulse withstand voltage kV 75 Rated operating sequence O-0.3s-CO-180s-CO Mechanical lifetime Times 20000 Rated operation voltage V 220V DC AC