21
d. Remove the fastening nuts (not the red area) on the flange (9 pieces of M8 nuts with spring washers,
13mm wrench). Pull out the oil suction pipe (See Figure-6-3).
e. Carefully lift out the switch insert vertically from the oil compartment (See Figure-6-4). Put the switch
insert on a horizontally flat table to avoid it from tipping. After the insert is lifted out, it is forbidden to
change the tap selector’s position during assembly.
6.2.2 Lifting out the mounting flange
a.
Remove the remaining fixing nuts (13 pieces of M8 nuts with butterfly washers, 13mm wrench) on
the mounting flange (see Figure-6-5). Lift the tap-changer’s mounting flange from the supporting
flange (see Figure-6-6)
Do not drop fasteners into the oil compartment and put them in a safe place.
Do not damage the O sealing ring on the pipe connection. Do not drop
fasteners into the oil compartment and keep them in safe places. When
doing tests with tap-changer in the transformer, the 9 pieces of M8
nuts must be securely fastened.
To Next Page
Loading...
