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6.3 Installation of tap changer on standard type transformer
6.3.1 Remove the mounting flange of tap changer head and lift out the diverter switch insert
6.3.2
Lift out the installation flange.
6.3.3 Assembly of oil compartment of tap changer and tap selector.
6.3.4 Assembly and installation of flange transformer box cover
a. Before installing the mounting flange of the tap changer, clean the sealing surface, place the gasket on the
mounting flange of the transformer, and fix the mounting flange of the tap changer on the mounting flange of
the transformer (24 pieces of M10 bolts, torque of 100 to 110 N.m.) (see Figure-6-12).
b. Lift the transformer box cover over the transformer body and assemble it.
6.3.5 Use lifting equipment to lift SHZV to the mounting surface of bell flange support flange for
connection.
6.3.6 The installation of on load diverter switch insert, oil suction pipe and top cover is the same as bell
type.
6.4 The installation of plate SHZV
Type plate SHZV is special design, please contact with Huaming for further information on installation
manual.
6.5 Connection between tap of voltage regulating winding and terminal of tap changer
The tap of the voltage regulating winding must be connected according to the wiring schematic diagram. The
terminal of the tap changer shall be marked with the contact position mark on the insulating rod of the tap
selector. The tap of the voltage regulating winding and the terminal of the tap changer shall be connected
correctly according to the marking code on the tap changer.
6.5.1 The tap of voltage regulating winding is fixed with the terminal of tap changer, and the tap selector
terminal is provided with a through hole for the M10 bolt, which is convenient for the connection and
fixation between the tap of voltage regulating winding and the terminal of tap changer.
Make sure not to damage the tap-changer’s wiring terminal and the
diverter switch’s shield cap and grading ring (grading ring is applied only
when the voltage is 170kV and above).
The wiring of all tapping leads connected to the tap-changer must be reliable
and tight. The assembly of tap lead shall be such that the lead connected to the
tap selector does not pull the terminal.
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