MV switchgear
SFC ABB SFC AIR · Transformer protection
ABB UniSec Air component
Transformer protection unit with switch-disconnector and fuses.
Description
The SFC unit protects the transformer with a switch-disconnector and fuses. It belongs to the modular family, based on the ABB UniSec Air switchgear: it is placed next to the other units following the network diagram.
Rating plate data of the QMT range
Electrical characteristics
- Rated voltage
- 24 kV
- Lightning impulse withstand voltage
- 125 kV
- Power-frequency withstand voltage
- 50 kV · 1 min
- Rated frequency
- 50 Hz
- Rated busbar current
- 630 A
- Short-time withstand current
- 16 kA / 1 s
- Peak withstand current
- 40 kA
Safety and insulation
- Internal arc withstand
- IAC AFLR 16 kA / 1 s
- Degree of protection
- IP3X
- Insulation
- air · no fluorinated gas
Values common to the range. The specifications of this product depend on the plant diagram.
Other QMT products
Back to SF6-free medium-voltage switchgear
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