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6.2.4 Install tap changer into bell-type transformer tank
First, place the tap changer on the temporary support frame inside the transformer. To realize this, the tap
changer is equipped with a support flange on the oil compartment.
The assembly steps are as follows:
a. Lift the tap changer into the support frame and connect it with the voltage regulating winding. The tap
changer shall be stably placed on the support frame and shall not be moved at will.
b. Use the mounting hole on the support flange to temporarily fix the tap changer on the bracket. If necessary,
put a temporary adjusting pad between the temporary support frame and the support flange. Adjust the
installation height of the tap changer to the final installation position. The adjusting pad must be removed
before the installation of the transformer’s bell-type tank cover.
6.2.5
Assembly of bell-type transformer tank cover
a. Before assembling the bell-type transformer tank cover, clean the sealing surface of the oil compartment’s
support flange. Place the sealing ring on the support flange (Figure-6-13). Pull out the adjusting pad.
b. Lift the bell-type transformer tank cover over the transformer body and assemble it.
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