Conforms to IEC-62271 - 100 & 200
Metalclad, horizontally withdraw able, dust & vermin proof.
Extensible, modular for better electrical & mechanical properties.
Low chopping current possible with special contact materials.
High reliability.
Fully tropicalised modern insulating system.
Self aligning type isolating contacts for robust design.
Optimum mechanical stability and uniform distribution of electromagnetic forces.
Factory assembled unit for direct installation.
Stored energy type motor charged. Spring closing mechanism.
Fully interlocked for operational safety.
Test position of VCB truck within house, door locking possible in this condition.
High dielectric grade heat shrinkable bus bar sleeves.
Fire retardant high strength grade of insulation sheet used as insulation barriers.

Technical Parameters

Type : VM12
Rated Voltage : Upto 12 KV
Insulation Level
1-Min withstand : 28/35 KV rms
Impulse withstand : 75/95 KVp
Current:
Rated, Normal : Up to 3150 Amps
Rated STC-3 Sec : Up to 50 KA rms
Rated Short Circuit
breaking (Symm) : Up to 50 KA rms
Rated break time <=80 ms
Rated closing time <=75 ms
Contact Life
Mechanical : 30,000 Operation
At load current : 20,000-30,000 Operations
At full short Circuit current : 30 to 100 Operation depending on current.
 (As declared by ISO certified vacuum interrupter manufactures)