ABB GSec/IB, Instructions For Installation, Operation And Maintenance

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Earthing switch ES 230
5.6. Earthing switches
There are three types of earthing switches:
– ST
– ES 230 with 1S operating mechanism
– EF 230 with 2S operating mechanism.
They can be integrated into the enclosure containing the
switch-disconnector (fig. 9) or positioned on the load side of
the fuses or circuit-breaker (figs. 13, 14 and 15).
Earthing switch ST
is integrated into the enclosure of the
switch-disconnector and has full making capacity.
Earthing switch ES 230 , used in conjunction with the 1S
operating mechanism, is positioned on the load side of the
safety circuit-breaker, associated with the IMS, is interlocked
by a transmission lever to earthing switch ST and has full
making capacity.
Earthing switch EF 230
, associated with operating
mechanism 2S,
is positioned on the load side of the fuses, is interlocked by a
transmission lever and has a reduced making capacity of
5 kAp.
ES 230 (12-17.5-24kV 16kA)
ES 230 (12-25kA) (17.5-24kV 21kA)
Fig. 9a
Fig. 9b
Pos. Description Q.ty
1 ES 230-N Disconnector assembly 1
2 Screw M8X20-8.8 ISO8678 6
3 M8 hex nut 6
4 Earthing jaws 3
5 ES 230-N 25kA Additional 25kV kit 1