ENA TS 41-15 PT9 : ISSUE 1 1989
Current
Current
The latest, up-to-date edition.
Specifies methods of connecting the protective relay a.c. and d.c. circuits, the automatic switching circuits, the supplies to the metering circuits, the control circuits local to the 132 kV substation and interconnections to the equipment in the British Rail 25 kV substation.
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