The ZN28-12 series vacuum breaker is HV indoor switchgear with rated voltage 12KV,three-phase AC 50HZ.The product conforms to GB1984-89 standard.There are two types of architectural structure:integrative design for operating mechanism and breaker body or segregative design.Integrative design is just ZN28-12 basic model.and segregative design is just ZN28A-12 model,suitable for fixed weitch cabinets,such as GG-1A(z),XGN2A10(Z)and so on.
The product can match with CD17,CD10A DC electromagnet operating mechanism and CT17,CT19 spring energy storage operating mechanism.
Item Unit Parameter Rated voltage KV 12 Rated current A 630/1000/1250/1600/2000/2500/3150 Rated short circuit breaking current KA 20/25/31.5/40 Rated short circuit switching current KA 50/63/80/100 Rated peak value withstand current KA 50/63/80/100 Rated short time withstand current KV 20/25/31.5/40 Rated insulation level Power frequency withstand voltage(Rated open section front and back) KV 42( Fracture48) Impulse withstand voltage (Rated open section front and back) 75( Fracture85) Rated operating sequence O-0.3s-CO-180s-CO Mechanical life Times 10000 Breaking current frequency under rated short circuit Times 30/20 Operating mechanism rated switch-on voltage(DC) V 110/220 Operating mechanism rated switch-on current(DC) A 72/128 Operating mechanism rated off voltage(DC) V 110/220 Operating mechanism rated off current(DC) A 3.0/1.5
Dimension and mounting
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