Oil Filter Unit For Continuous Oil Filtration; Weights; Tightening Torque - ABB UBB Series Installation And Commissioning Manual

1 Introduction

1.5 Oil filter unit for continuous oil filtration

If the on-load tap-changer should have an oil filter unit for continuous oil filtration from ABB,
installation and commissioning instructions can be found in the manual for the oil filter unit,
"Oil Filter Unit for On-Load Tap-Changers, Manual" delivered with the oil filter unit.

1.6 Weights

Motor-drive mechanism BUE, weight: 130 kg
Motor-drive mechanism BUL, weight: 75 kg
Drive shaft system weight:
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
UBBLN
UBBRN
UBBDN
UBBLT
UBBRT
UBBDT

1.7 Tightening torque

The following tightening torques are recommended:
unless otherwise stated in this guide.
12
Approx. weight in kg
Tap-changer without oil Required oil
XXX/YYY 140
XXX/YYY
XXX/YYY
XXX/YYY 155
XXX/YYY
XXX/YYY
about 10 kg
100
125
M6,
M8,
M10, 49 Nm
M12, 84 Nm
Total weight
240
280
10 Nm ±10 %
24.5 Nm ±10 %
±10 %
±10 %
1ZSE 5492-118 en, Rev. 4