Features
| • No Usage of SF6 Gas Pressurized dry air is employed as insulating medium • Long Operation Life Without inspection of main contacts, VCB is capable of: – 10 000 rated current breaking – 20 Full fault current breaking • Easier Maintenance than GCB Vacuum interrupter has self arc extinguishing characteristics • Superior Performance in Cold Region Applicable ambient temperature without tank heater: -50~40°C |  |
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Specifications 36kV
| Type designation | NVBOA-30732B | ||
| Applicable standards | IEC-62271-100 (2008) | ||
| Rated voltage (kV) | 36 | ||
| Rated current (A) | 2000 | ||
| Rated frequency (Hz) | 50 / 60 | ||
| Insulation level | 1 min. power frequency (kV ms) | 70 | |
| 1.2 x 50µs impulse (kV peak) | 200 | ||
| Rated short time withstand current (kA-sec) | 31.5-3 | ||
| Rated peak withstand current (kA peak) | 82 | ||
| Dry air pressure | Rated pressure (MPa) | 0.50 | |
| Low pressure alarm (MPa) | 0.45 | ||
| Low pressure lockout (MPa) | 0.40 | ||
| Rated operating sequence | Open – 0.3 sec -Close Open – 3 min – Close Open | ||
| Mass without CTs (kg) | 1500 |
Specifications 72.5kV
| Type designation | NVBOA-60732B | NVBOA-60740B |
| Applicable standards | ANSI c37.06, IEC 62271-100 | |
| Rated voltage (kV) | 72.5 | |
| Rated current (A) | 2000 | |
| Rated frequency (Hz) | 50 / 60 | |
| Insulation level | 1 min. power frequency (kV ms) | 160 |
| 1.2 x 50µs impulse (kV peak) | 350 | |
| Rated short time withstand current (kA-sec) | 31.5-3 | 40-3 |
| Rated peak withstand current (kA peak) | 82 | 108 |
| Dry air pressure | Rated pressure (MPa) | 0.50 |
| Low pressure alarm (MPa) | 0.45 | |
| Low pressure lockout (MPa) | 0.40 | |
| Rated operating sequence | Open – 0.3 sec -Close Open – 3 min – Close Open | |
| Mass without CTs (kg) | 1900 |