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1ZSE 5492-118 en, Rev. 4

TC_00265

5 Final assembly

6. Connect the square shaft with the mounted coupling halves to the shaft of the bevel

gear. Mount two coupling halves SA14 to the square shaft perpendicular to the cou-

pling in the other end, and the shaft of the motor-drive mechanism. Tighten the screws

lightly and check that the shaft not can be moved more than 2 mm in axial direction

(axial play). Tighten the screws A rst and thereafter the other. See Fig. 28 and Fig. 19.

7. Mount the tube with the greater diameter, SA16, to the bevel gear with a hose clip

SA10. See Fig. 29.

SA14

Fig. 28.

SA10

SA14

SA16

Fig. 29.

8. Check that the motor-drive mechanism is in the EXACT position and that the position

indicator in the motor-drive mechanism shows the same position as the indicator inside

the top-cover of the on-load tap-changer.

EXACT position for the BUE is when the red indicator ag is in POSITION and the red

mark on the brake disc is aligned with the red mark on the brake pad. See Fig. 13.

EXACT position for the BUL is when the roller on the brake arm is in the notch of the

cam disc. See Fig. 14.

If out of position hand crank the motor drive mechanism to EXACT position according

to above.

9. Open the cover of the gear box on the top cover of the on-load tap-changer. Check

that the key on the vertical shaft in the bevel gear is facing the earthing symbol on the

ange of the on-load tap-changer. See Fig. 30. If not, the multiple hole coupling must

be adjusted. Turn the vertical shaft until the key is facing the earthing symbol. Mount the

two screws and the locking nuts in the two holes of the coupling halves which are clos-

est to each other and tighten.

CAUTION

If the key is not in position as described above, the tap-changer operation will be too early in

one direction and too late in the opposite direction.

The motor-drive mechanism and the on-load tap-changer shall have the same indicated

tap position and the key in the bevel gear onto the on-load tap-changer shall be facing the

earthing symbol according to Fig. 30.

WARNING

The bevel gear contains moving gears. Be cautious!

ABB UBBRT User Manual

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