Figure 3-7. Tap changer

ME 6120-250-12/3-7

Cap

Drive mechanism

Slot in indicator cam

Bolts, hex head

Figure 3-7. Tap changer.

With the cover removed check or change terminal

WARNING

connections according to the tables on the name plate

Before removing a terminal board cover,

for high and low voltage terminal connections and

vent the transformer to atmospheric

voltages.

pressure. See following subparagraph h.

g. To replace the covers perform removal steps

f. Terminal boards for the high voltage and low

in reverse order. The gasket can be reused many times

voltage connections are located under the oval shaped

if not damaged. Thoroughly clean the gasket surfaces.

covers on the top. (fig. 3-8). These covers must be

Although no stickers are required, the compound

removed to make connection changes on the terminal

furnished with or for the gaskets may be used to hold

boards. To remove these covers loosen and remove

them in place during assembly. After replacing gasket,

the 12 nuts securing it to the top. Then remove the

cover and nuts, tighten the nuts to coin press the gasket

cover taking care not to damage gasket.

approximately one-third, or to

3-12