SIEMENS 8DJH Ring Main Operator Guide Circuit Breaker Panel
1
WARNING
Check that the Ready For Service (gas) Gauge indicates GREEN before operation
DO NOT OPERATE switchgear if the pointer is in the RED region
1
Slide the Isolator/Earth Switch Control Gate down to
open the Earth Shutter. 2
Insert the Operating Lever and rotate anti- clockwise
to open the Earth Switch. 3
Remove the Operating Lever. Check the
Control Gate has returned to the mid position.
A
Feeder Earthed u
Feeder Isolated u
1
Slide the right-hand Control Gate up to open the
Isolator Shutter.
4
(a) Remove the Operating Lever. Check the
Control Gate has returned to the mid position.
(b) Slide the left-hand Control Gate up to open the
Circuit Breaker Spring Charge Shutter.
2
Insert the Operating Lever and rotate clockwise
to close the Isolator Switch.
5
Insert the Operating Lever and rotate clockwise to
charge the Circuit Breaker Spring. It will click and hold
when rotated enough (70°).
Note: The aperture is sprung to eject the handle automatically.
It must be pushed in firmly and held to rotate.
3
For panels where the Circuit Breaker Spring Charge
mechanism is motorised, the spring is automatically
recharged immediately after the Circuit Breaker is
opened. In this case, steps 4 and 5 can be omitted.
6
Remove the Operating Lever. Press the CLOSE
button VERY HARD.
B
Feeder Isolated u
Feeder Connected u
These instructions detail mechanical operation of standard designs only
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