ABB UCL, Installation And Commissioning Manual

Content

1. Introduction ..........................................................................................................................9

1.1 Type designation ...........................................................................................................11
1.2 Required tools ..............................................................................................................12
1.3 Required material ..........................................................................................................12
1.4 Oil .................................................................................................................................12
1.5 Oil conservator ..............................................................................................................12

1.6 Oil filter unit for continuous oil filtration

...........................................................................13

1.7 Weights ........................................................................................................................13
1.8 Tightening torques ........................................................................................................13

2. Receiving ..............................................................................................................................14

2.1 Unpacking ....................................................................................................................14
2.2 Inspection on receipt .....................................................................................................14
2.3 Temporary storage before assembly..............................................................................14

3. Installation in the transformer ................................................................................................15

3.1 Cover-mounting ............................................................................................................16

3.1.1 UCL/VUCL with tap selector size III ........................................................................16

3.2 Yoke-mounting .............................................................................................................19

3.2.1 Mounting when the transformer ratio measurement is carried out before drying ......20
3.2.2 Mounting when the transformer ratio measurement is carried out after drying .........22

3.2.3 Mounting on transformer cover (after the drying process)

 .......................................23

3.3 Connection to terminals ................................................................................................25
3.4 Transformer ratio measurement .....................................................................................27

3.4.1 Transformer ratio measurement before drying .........................................................27
3.4.2 Transformer ratio measurement after drying ............................................................27

4. Drying ...................................................................................................................................28

4.1 Precautions before processing ......................................................................................28
4.2 Precautions after processing .........................................................................................28
4.3 Installation of diverter switch .........................................................................................28

5. Final assembly ......................................................................................................................30

5.1 Mounting of motor-drive mechanism .............................................................................30
5.2 Mounting of external drive shafts ...................................................................................34

5.2.1 Mounting of vertical drive shaft ...............................................................................34
5.2.2 Mounting of horizontal drive shaft for one unit .........................................................36
5.2.3 Mounting of horizontal drive shaft for two units .......................................................38
5.2.4 Mounting of horizontal drive shafts for three units ...................................................40
5.2.5 Before operation .....................................................................................................40

5.3 Supervisory equipment .................................................................................................40
5.4 Assembly of accessories ...............................................................................................40
5.5 Connection to the oil conservator ..................................................................................40
5.6. Connection of tube for oil sampling for VUC .................................................................41