1ZSE 5492-124 en, Rev. 6 | Maintenance guide UCG 13
The inspection mainly consists of a visual check of the motor-
drive mechanism and the conservator once a year while the
transformer is in service.
In the motor-drive mechanism the following points are to be
checked:
– Motor and counter
– Heater
– The counter’s value
– Visual check of the toothed belt
See the maintenance guide for motor-drive mechanisms
(1ZSC000498-ABH) for information about the procedure.
On the conservator the following are to be checked:
– Oil level
– Breather
WARNING
The breathers and the tube from the conservator
contains explosive gases. No open fire, hot surfaces
or sparks may be present when loosening the
breather.
CAUTION
Approval should be given for inspection as well as for
operating the on-load tap-changer.
1. Check the breathers according to the instructions for the
transformer.
2. Check the oil level in the conservator for the on-load
tap-changer. The oil level should be according to the
transformer documentation.
2. Inspection
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