Meidensha VCB Dry Air Insulated Dead Tank Vacuum Circuit Breaker

Manufacturer: Meidensha Corporation
Model: VCB

Features

Dead Tank Type VCB optimized for green procurement. It uses dry air for insulation in place of the SF6 which is specified as a greenhouse gas. Our basic design concept is to realize the environmental factors in design (The 3Rs (Reduce, Reuse, and Recycle) + LS (Longuse & Separable)) and life-cycle cost (LCC) reduction as basic concepts.
[Reduce] No use of SF6 gas (a greenhouse gas), reduction of eddy current loss by adopting an aluminum tank, reduction of mass by using aluminum materials, and compact design.
[Reuse / Recycle] Reuse of non-rusting and non-corrosive components (reuse of the aluminum and copper materials)
[Long Use] Longer operational life by adopting the VCB
Long operational life without requiring the repair paint work as it uses the aluminum materials
[Separable] Ease of decomposition and collection (no need to collect SF6 gas by collection equipment , no need for SF6 gas reprocessing)

Applications

36/72/84 kV VCB (for Japan Market ) – compliant with the JEC-2300 Standard (for AC circuit breakers).
36/72.5 kV (for overseas markets ) – compliant with IEC 62271-100-2008 and ANSI C37.06-2009.

Specifications

Type and rating

TypeNVBOA-30732BNVBOA-60732BB
NVBOA-60832BB
NVBOA-60740BB
NVBOA-60840BB
Rated voltage (kV)3672.5
Withstand
voltage
1 min power frequency (kV rms)70140
1.2×50μs impulse (kV peak)200350
Rated frequency (Hz)50/60
Rated normal current (A)20002000/3150
Rated short circuit breaker current (kA)31.540
Rated transient recovery voltage Rate of rise

(kV/μs)

1.191.47
First pole to clear factor1.5
Rated short circuit making current (kA)82104
Rated short time current (kA)31.5 (3s)40 (3s)
Rated breaking time (cycle)3
Rated opening time (s)0.0330.03
Make time with no load (s)0.050.10
Operating dutyO-0.3s-CO-15s-CO
Closing control voltage (Vdc)48, 100, 110, 125, 250
Rated tripping voltage (Vdc)48, 100, 110, 125, 250
Supply voltage for

charging motor

(Vdc)48, 100, 110, 125, 250
(Vac)60, 120, 240
Rated dry-air pressure0.5MPa-g (at 20℃ )
Closing operation systemSpring
Tripping control systemSpring
Applicable standardIEC 62271-100-2008, ANSI/IEEE C37.06-2009

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