5. OPERATION 87
5.8.2. Operation of the isolating device for
voltage transformers in panels with outer cones
Hazard warning
Isolate the relevant switchgear section
before connecting or disconnecting
voltage transformers.
• Comply with the safety regulations to
• Check the switchgear section for the
off-circuit condition as described in
section 5.1. Ground the switchgear
section and secure the working area in
accordance with section 4. and
• Switch the mcbs (
1
operating mechanisms off in order to
prevent the switchgear section being
energized by remote control.
The operating mechanism for the voltage
transformer isolating device is located in the
cable termination compartment on the right-
hand side wall (fig. 5.8.2.1).
Dismantle the cover on the cable termination
compartment. This is done by removing the two
screws above the cover and pulling the cover
upwards.
The controls and indicators for the voltage
transformer isolating device are shown in
fig. 5.8.2.1. Check the switch position indicator (
5
and
6
). The isolating device can be secured
with a padlock
3
. Remove the padlock before
operating the device.
—
Fig. 5.8.2.1:
Controls and displays
for the voltage trans-
former isolating device
1
Bar for padlock
2
Flap
3
Padlock (optional)
4
Latching slot
5
Switch position indicator, “voltage
transformer grounded”
6
Opening for switch position indicator,
“voltage transformer connected”
7
Warning sign
1
3
4
2
7
5
6
1. mcb: miniature circuit breaker.
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