12
1ZSE 5492-118 en, Rev. 4
1 Introduction
1.5
Oil lter 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
Motor-drive mechanism BUE, weight: 130 kg
Motor-drive mechanism BUL, weight: 75 kg
Drive shaft system weight: about 10 kg
The weights of the motor-drive mechanism and drive shaft system are not included in the
weights given in table 1.
Table 1. Weights of on-load tap-changer, type UBB.
On-load tap-changer
Type designation
Approx. weight in kg
Tap-changer without oil Required oil Total weight
UBBLN XXX/YYY 140 100 240
UBBRN XXX/YYY
UBBDN XXX/YYY
UBBLT XXX/YYY 155 125 280
UBBRT XXX/YYY
UBBDT XXX/YYY
1.7 Tightening torque
The following tightening torques are recommended: M6, 10 Nm ±10 %
M8, 24.5 Nm ±10 %
M10, 49 Nm ±10 %
M12, 84 Nm ±10 %
unless otherwise stated in this guide.
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