VS1-12 Type side-mounted High-voltage Vacuum Circuit Breaker is an indoor high-voltage switching device and is used for protection and control of electric appliance,applied for three-phase power system with rated voltage of 12KV and frequency of 50HZ,as the special advantage of vacuum circuit breaker,it is especially suitable for place in need of frequent operation under rated current or multiple breaking short-circuit current.
VS1-12 type side-mounted vacuum circuit breaker adopts fixed installation,mainly used for fixed switch cabinet,this circuit breaker can not only be used independently,but also it can be applied for ringpsystem power supply.cabinet substation or various non-standard poser supply system.
Item Unit Parameter Rated voltage KV 12 max.operating voltage KV 12 Rated current A 630/1250 630/1250 630/1250 Rated short circuit breaking current KA 20 25 31.5 Rated short current switching current KA 50 63 80 Rated peak value withstand current KA 50 63 80 Rated short time withstand current KA 20 25 31.5 Rated insul-ation leve Power frequency withstand voltage(Rated open section front and back) Kv 42(Fracture 48) Impulse withstand voltage(Rated open section front and back) 75( Fracture 84) Rated operating sequence O-0.3s-CO-180s-CO Mechanical life 次 20000 Breaking current frequency under rated short circuit 次 50 Operating mechanism rated switch-on voltage(DC) V 110,220 Operating mechanism rated off voltage(DC) V 110,220 Contact opening mm 11±1 Overtravel(Compressed length of contact spring) mm 3.5±0.5 Three-phase switching on or off non-synchroneity ms ≤2 Contact closing bounce time ms ≤2 Average Switch off speed m/s 0.9-1.2 Average switching on speed m/s 0.4-0.8 Switch-off time Under maximum operation voltage s ≤0.05 Under minimum operation voltage ≤0.08 Switch-on time s 0.1 Loop resistance uΩ 60 40 Each phase loop DCresistance mm 3
High-voltage Vacuum Circuit Breaker Dimension and mounting
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