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During service
WARNING
Small amounts of explosive gases may be emitted
from the breathing devices (dehydrating breather or
one-way breather). Make sure that no open fires, hot
surfaces or sparks occur in the immediate vicinity of
the breathing devices.
WARNING
If a power supply failure occurs during operation, the
operation will be completed when the power returns.
WARNING
The hand crank must not be inserted during electrical
operation.
WARNING
If the tap-changer is not at its exact position and the
hand crank is pulled out, the motor-drive mechanism
will start and go to the exact position if the power
supply is on.
CAUTION
After a pressure relay trip, follow the instructions in
the chapter "Trip or alarm from supervisory devices" in
the user's manual.
CAUTION
The pressure relay is a calibrated monitoring
instrument. It must be handled with care and
protected against careless handling or any kind of
mechanical damage. Do not open the pressure relay
package until just prior to installation on the tap-
changer.
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