GE PHI 530.1425.2500 Operating And Maintenance Instructions Manual page 16

Lift the bushing in horizontal position
•
up to 2 m from the floor.
Start inclining the bushing by acting on
•
the Tirfor (Item 2).
Continuously check
•
inclining operation that the bottom part
of the bushing will not hit the floor or
any other part.
Check the correct inclination on the
•
transformer side of the bushing flange
angle by a Quadranfix inclinometer or
by an electronic inclination gauge (not
supplied by GE RPV).
Control with the same instrument the
•
effective inclination angle of the
transformer turret flange and adjust
the bushing
accordingly by acting on the Tirfor
(Item 2).
When the bushing axis will coincide to
•
the turret axis and the inclination angle
is OK, slowly proceed with the bushing
insertion inside the turret.
By continuously controlling that the
•
turret and the bushings are aligned,
gradually insert the bushing inside the
transformer turret.
NOTE: During this
mandatory to continuously check that the
bushing cone will remain centred respect
the turret flange and the CT coils
arrangement, normally placed inside the
turret.
Check that there are no interferences and
that no damages or scratches occur on the
cone and the metal parts of the oil side of
the bushing. In case
immediately contact
Connections RPV Supervisor and the
Foreman and stop the operation.
Complete the installation of the other
•
bushings and after the completion of
the transformer preparation, install the
electrostatic top
bushings.
Fill the bushing with SF6 (see Chapter
•
8).
Complete all relevant activities for the
•
transformer preparation.
WARNING: Before proceeding with the
gas filling operation,
Transport pressure
Paragraph 3.1 and Figure 1).
HVDC TRANSFORMER BUSHINGS
during the
inclination angle
operation, it is
of damages,
GE Energy
shields on the
remove the
gauge (see
PHI 530.1425.2500
PHI 265.850.1500
Kepco project
IS 2664 GB
Page 16 of 70
Quadranfix
inclinometer