Vacuum Circuit Breaker (VCB)Dry Air Insulated Dead Tank Vacuum Circuit Breaker
This is an environmentally-friendly vacuum circuit breaker (VCB). Considering the climate change, we made VCB with totally SF6 gas-free and resource and energy saving features.
Product 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 and Solutions
- 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 |
NVBOA-30732B |
NVBOA-60732BB |
NVBOA-60740BB |
|
|---|---|---|---|---|
| Rated voltage (kV) | 36 | 72.5 | ||
|
Withstand |
1 min power frequency (kV rms) |
70 | 140 | |
|
1.2x50μs impulse (kV peak) |
200 |
350 |
||
| Rated frequency (Hz) | 50/60 | |||
| Rated normal current (A) | 2000 |
2000/3150 |
||
| Rated short circuit breaker current (kA) | 31.5 |
40 |
||
| Rated transient recovery voltage |
Rate of rise (kV/μs) |
1.19 |
1.47 |
|
| First pole to clear factor | 1.5 | |||
| Rated short circuit making current (kA) | 82 |
104 |
||
| Rated short time current (kA) | 31.5 (3s) |
40 (3s) |
||
| Rated breaking time (cycle) | 3 | |||
| Rated opening time (s) | 0.033 |
0.03 |
||
| Make time with no load (s) | 0.05 |
0.10 |
||
| Operating duty | O-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 pressure |
0.5MPa-g (at 20℃ ) |
|||
|
Closing operation system |
Spring |
|||
|
Tripping control system |
Spring |
|||
|
Applicable standard |
IEC 62271-100-2008, ANSI/IEEE C37.06-2009 |
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