36 & 72.5kV Dry Air Insulated VCB

Features

  • No Usage of SF6 Gas
   Pressurized dry air is employed as insulatring 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

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

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