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1ZSE 5492-115 en, Rev. 5
9 Commissioning
9. Commissioning
This section describes tasks to be carried out when the transformer is being installed and
tested on site.
CAUTION
The motor-drive mechanism must be protected against condensation.
Energize the heater when power is available. When not available, put drying agent inside the
motor-drive cabinet and seal the vents.
9.1 Reassembly
Reassemble the conservator and all other accessories which may have been dismantled for
the transport. Remember the O-rings in the anges.
9.2 Oil lling
See chapter 6.
9.2.1 Dehydrating breather
If the breather has an oil trap, ll oil to the marked level.
9.3 Electrical connection and testing
Do all wiring work and perform the appropriate tests as described in chapter 7.
9.3.1 Motor protection
The function of the protective motor switch should be checked. For three-phase AC motors,
remove one of the phase fuses and check the function time of the protective motor switch
by a RAISE or LOWER operation. The protective motor switch should release within 60 sec-
onds at a current setting equal to the rated current of the motor at the actual voltage.
If the protective motor switch do not trip within 60 seconds, adjust the current setting. Re-
peat the test when the motor is cold.
WARNING
The motor power voltage is dangerous.
Protective motor switches for DC motors or single-phase AC motors are not necessary to
test.
9.3.2 Counter
Check that the counter functions upon RAISE and LOWER operations.
9.3.3 Position transmitter and other multi-position switches
Check the function of the position transmitter and other multi-position switches.
9.3.4 Light
Check that the light is switched on when the door is opened and goes out when the door is
closed.
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