Content
1. Safety ............................................................................................................................... 5
1.1 General ..................................................................................................................... 5
1.2 Safety warnings ........................................................................................................ 5
1.3 Safety precautions .................................................................................................... 5
1.3.1 Personal safety ................................................................................................... 5
1.3.2 Environmental safety ........................................................................................... 5
1.3.3 First aid .............................................................................................................. 5
1.3.4 In the event of fire
............................................................................................... 5
2. Introduction ...................................................................................................................... 6
2.1 General ..................................................................................................................... 6
2.2 Functional description ............................................................................................... 6
2.2.1 Switching sequence, operation with resistor side first
......................................... 7
2.2.2 Switching sequence, operation with main contact first
........................................ 9
2.3 System overview ....................................................................................................... 11
2.3.1 Types of switching .............................................................................................. 12
2.3.2 Types of connection ........................................................................................... 13
2.3.3 Housing .............................................................................................................. 14
2.3.4 Selector switch ................................................................................................... 14
2.3.5 Change-over selector ......................................................................................... 14
2.4 Contacts ................................................................................................................... 14
2.5 Vacuum interrupters .................................................................................................. 14
2.6 Transition resistors .................................................................................................... 14
2.7 Spring-loaded mechanism ........................................................................................ 14
2.8 Motor-drive mechanism ............................................................................................ 14
2.9 Accessories and protection devices .......................................................................... 14
2.10 Rating plate ............................................................................................................ 16
3. Commissioning ................................................................................................................. 17
3.1 General ..................................................................................................................... 17
3.2 Reassembly .............................................................................................................. 17
3.3 Required tools and materials ..................................................................................... 17
3.4 Tightening torques .................................................................................................... 18
3.5 Oil filling
.................................................................................................................... 18
3.5.1 Oil quality ............................................................................................................ 18
3.5.2 Filling methods and restrictions ........................................................................... 18
3.5.3 Correct oil level ................................................................................................... 18
3.5.4 Filling at atmospheric pressure............................................................................ 18
3.5.5 Filling under vacuum ........................................................................................... 19
3.6 Mounting of external drive shafts ............................................................................... 20
3.6.1 Mounting of horizontal drive shaft ....................................................................... 20
3.6.2 Mounting of vertical drive shaft ........................................................................... 23
3.7 Testing ...................................................................................................................... 27
3.8 Energizing ................................................................................................................. 28
3.9 Putting into operation ................................................................................................ 28
