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1ZSE 5492-115 en, Rev. 5
1 Introduction
1.5 Filter unit for continuous oil ltration
If the on-load tap-changer should have an oil lter unit for continuous oil ltration from ABB,
installation and commissioning instructions can be found in the manual for the oil lter unit,
”Oil Filter Unit for On-Load Tap-Changers, Manual” delivered with the oil lter unit.
1.6 Weights
Table 2 contains the approximate weights of all the models in the UZ range of on-load tap-
changers. The weight of the motor-drive mechanism is included in the overall weight.
Table 2. Weights for UZ on-load tap-changers in kg.
On-load tap-changer
Type designation
Tap-changer with tank
without oil
Insert without motor-drive
mechanism
UZE.N, UZE.T
200/... 700 220
250/... 700 220
380/... 930 270
550/... 1100 340
650/... 1100 340
UZF.N, UZF.T
200/... 720 220
250/... 720 220
380/... 900 270
550/... 1100 340
650/... 1100 340
The weight of the motor-drive mechanism is approximately 110 kg
1.7 Tightening torque
The following tightening torques are recommended:
M6, 10 Nm ±10 % (7.4 lbf x ft)
M8, 24.5 Nm ±10 % (18 lbf x ft)
M10, 49 Nm ±10 % (36 lbf x ft)
M12, 84 Nm ±10 % (62 lbf x ft)
Welded stud bolts
M12, 42 Nm (31 lbf x ft)
unless otherwise stated in this guide.
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