UniSwitch (ABB Technology)

Medium voltage, Air-insulated, Compact switchgear for secondary distribution

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UniSwitch is air-insulated (AIS) and metal-enclosed.

UniSwitch provides long-term technical solutions for various applications. Safety, user-friendliness and environmental concerns have been the driving forces in the development of the switchgear. UniSwitch switchgear is a compact solution for a fully automated power distribution network. Supported by high technology and the latest in protection relays, it meets even the most demanding requirements in different applications.

UniSwitch can be used in various applications in the distribution network. UniSwitch offers a wide range of panels, making it possible to identify the most cost-efficient solution for all applications by combining the available panel types.

 

Ambient conditions
The switchboard ratings are guaranteed under the following ambient conditions:

Minimum ambient temperature   -5 °C
Maximum ambient temperature   +40 °C
Maximum relative humidity   95%
Maximum altitude   1000 m

 

Switchgear electrical characteristics

Rated voltage kV 12 17.5 24
Rated insulation voltage kV 12 17.5 50
Test voltage at power frequency kV 28 38 125
Impulse withstand voltage kV 75 95 50-60
Rated frequency Hz 50-60 50-60 50-60

Rated short-time withstand current

Rated duration of short circuit

kA

Sec.

25

1/2

20

1/3

20

1/3
Peak current kA 62.5 50 50
Internal arc withstand current kA 1s 20 20 20

Bus bar rated current

Feeder rated current
A

630/1250

630

630/1250

630

630

630