ABB
5
Uniswitch Operation and
Maintenance Manual
UNIS14GB 05-02
2 Technical data
2.1 Electrical data
Table 2.1 Electrical data
Rated voltage U
r
kV 12 17.5 24
Rated lightning impulse withstand voltage U
p
kV
Common value 75 95 125
Across the isolating distance 85 110 145
Rated power-frequency withstand voltage U
d
kV
Common value 28
1
38
1
50
Across the isolating distance 32
1
45
1
60
Rated frequency Hz 50/60 50/60 50/60
Rated current I
r
A
Busbar 630/1250 630/1250 630/1250
Feeder 630/1250 630/1250 630/1250
Rated short-time withstand current
2
kA
Main circuit 25 20 20
Earthing circuit 25 20 20
Rated duration of short circuit s 2 3 3
Rated peak withstand current kA 62,5 50 50
Degree of protection (IP-code)
For the enclosure IP 2XC IP 2XC IP 2XC
For the partitions IP 2X IP 2X IP 2X
Mechanical endurance of switch-disconnector Times
Closed/Open 1000 1000 1000
Open/Earthed 1000 1000 1000
SF6-gas in switch-disconnector Bar
Rated filling pressure 1,4 1,4 1,4
Minimum operating pressure 1,3 1,3 1,3
1
Higher values are possible if required by other national standards.
2
The short-circuit withstand capacity of the instrument transformers must be taken into account
separately.
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