Table of Contents
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6. Oil filling and draining ............................................................................................................42
6.1 Filling methods and restrictions .....................................................................................42
6.2 Before filling ..................................................................................................................42
6.3 Filling at atmospheric pressure ......................................................................................42
6.4 Filling under vacuum .....................................................................................................42
6.4.1 Oil conservator filled under vacuum ........................................................................42
7. Electrical connection and testing ..........................................................................................44
7.1 General .........................................................................................................................44
7.2 Connecting and testing the motor-drive mechanism and the tap-changer ..........................44
7.3 Electrical tests on the transformer .................................................................................44
7.4 After energizing .............................................................................................................44
8. Transport ..............................................................................................................................45
8.1 Dismantling before transport .........................................................................................45
8.1.1 Dismantling preparations ........................................................................................45
8.1.2 Removal of the vertical drive shaft...........................................................................45
8.1.3 Removal of horizontal drive shaft for one unit ..........................................................45
8.1.4 Removal of horizontal drive shafts for two units ....................................................... 45
8.1.5 Removal of horizontal drive shafts for three units ....................................................45
8.1.6 Accessories ............................................................................................................46
8.2 Oil level during transport ...............................................................................................46
8.2.1 Transformer filled with oil .........................................................................................46
8.2.1.1 Conservator mounted .....................................................................................46
8.2.1.2 Conservator unmounted .................................................................................46
8.2.2 Transformer drained ...............................................................................................46
8.2.2.1 Conservator mounted .....................................................................................46
8.2.2.2 Conservator unmounted .................................................................................46
9. Commissioning .....................................................................................................................47
9.1 Connection to the oil conservator ..................................................................................47
9.2 Mounting the motor-drive mechanism and the drive shafts............................................47
9.2.1 Mounting of the motor-drive mechanism .................................................................47
9.2.2 Mounting of the external drive shafts ......................................................................47
9.2.3 Mounting of the vertical drive shaft .........................................................................48
9.2.4 Mounting of horizontal drive shaft for one unit .........................................................49
9.2.5 Mounting of horizontal drive shafts for two units .....................................................50
9.2.6 Mounting of horizontal drive shafts for three units ..................................................51
9.2.7 Before operation .....................................................................................................51
9.3 Supervisory equipment .................................................................................................51
9.4 Accessories ..................................................................................................................51
9.5 Oil filling ........................................................................................................................51
9.6 Electrical connection and testing ...................................................................................51
9.6.1 Motor protection .....................................................................................................51
9.6.2 Disk brake ..............................................................................................................52
9.6.3 Counter ..................................................................................................................52
9.6.4 Position transmitter and other position switches .....................................................52
9.6.5 Light .......................................................................................................................52
9.6.6 Heater ....................................................................................................................52
9.7 Putting into operation ....................................................................................................52
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