4.4.3.1
Charging the stored energy spring system ........................................ 34
4.4.3.2
Opening and closing the VD4 type circuit-breaker ............................ 34
4.4.4
Circuit-breaker – type HD4 ............................................................................... 35
4.4.4.1
Manual operation for spring charging................................................. 35
4.4.4.2
Electrical operation for spring charging.............................................. 35
4.4.4.3
Circuit-breaker closing........................................................................ 35
4.4.4.4
Circuit-breaker opening ...................................................................... 36
4.4.5
Earthing switch - type EM ................................................................................. 37
4.4.5.1
General ............................................................................................... 37
4.4.5.2
Manual opening and closing............................................................... 38
4.5
Voltage presence indicating systems........................................................................... 39
4.5.1
Voltage presence indicating systems CL-497 and CL-498.............................. 39
5
Service and maintenance ...................................................................................................... 40
5.1
General warnings and cautions.................................................................................... 40
5.2
Maintenance intervals................................................................................................... 42
5.3
Inspection...................................................................................................................... 43
5.4
Servicing ....................................................................................................................... 44
5.5
Repair ........................................................................................................................... 45
5.5.1
Switchgear in general ....................................................................................... 45
5.5.2
Replacement of melted fuse links .................................................................... 46
5.5.2.1
Investigate and clear a fault ............................................................... 46
5.5.2.2
Removal of the fuse links. .................................................................. 47
5.5.2.3
Installing the fuse links ....................................................................... 47
5.6
Testing withdrawable parts........................................................................................... 48
5.6.1
Testing interlock conditions .............................................................................. 48
5.7
Spare parts, auxiliary materials and lubricants ............................................................ 51
5.7.1
Spare parts ....................................................................................................... 51
5.7.2
Auxiliary materials and lubricants..................................................................... 51
6
Troubleshooting ..................................................................................................................... 52
7
Product quality and environmental protection ....................................................................... 54
7.1
General ......................................................................................................................... 54
7.2
Packing materials ......................................................................................................... 55
7.3
Materials used in production ........................................................................................ 55
