ABB UCC Series, Installation And Commissioning Manual

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Contents
1 Introduction ____________________________________________ 9
1.1 Type Designation ________________________________________ 10
1.2 Required Tools __________________________________________ 13
1.3 Required Material _______________________________________ 13
1.4 Oil ___________________________________________________ 14
1.5Oil Conservator _________________________________________ 14
1.6 Oil Filter Unit for Continuous Oil Filtration ___________________ 15
1.7 Weights _______________________________________________ 15
1.8 Tightening Torque _______________________________________ 17
2 Receiving ______________________________________________ 17
2.1 Unpacking _____________________________________________ 17
2.2 Inspection on Receipt _____________________________________ 17
2.3 Temporary Storage before Assembly _________________________ 17
3 Installation in the Transformer ______________________________ 18
3.1 Cover-Mounting _________________________________________ 19
3.1.1 UCC with Tap Selector size IV _____________________________ 19
3.1.2 UCD with Tap Selector size III _____________________________ 23
3.1.3 UCD with Tap Selector size G _____________________________ 26
3.2 Yoke-Mounting _________________________________________ 33
3.2.1 Mounting when the Transformer Ratio Measurement
is carried out before Drying ________________________________ 34
3.2.2 Mounting when the Transformer Ratio Measurement
is carried out after Drying _________________________________ 36
3.2.3 Mounting on Transformer Cover ____________________________ 37
3.3 Connection to Terminals __________________________________ 40
3.4 Transformer Ratio Measurement ____________________________ 42
3.4.1 Transformer Ratio Measurement before Drying ________________ 43
3.4.2 Transformer Ratio Measurement after Drying__________________ 43
4 Drying ________________________________________________ 44
4.1 Observations before Processing _____________________________ 44
4.2 Observations after Processing ______________________________ 44
4.3 Installation of Diverter Switch ______________________________ 45
5Final Assembly _________________________________________ 49
5.1 Mounting of the Motor-Drive Mechanism _____________________ 49
5.2 Mounting of External Drive Shafts __________________________ 51
5.2.1 Mounting of Vertical Drive Shaft ___________________________ 53
5.2.2 Mounting of Horizontal Drive Shaft _________________________ 55
5.2.3 Before Operation ________________________________________ 57
5.3 Pressure Relay __________________________________________ 58
5.3.1 General ________________________________________________ 58
5.3.2 Installation _____________________________________________ 58
5.3.3 Checking at Commissioning of the Transformer ________________ 59
5.4 Assembly of Accessories __________________________________ 59
5.5 Connection to the Oil Conservator ___________________________ 60