41
Index
1. Warning ......................... 42
2. Frequency of maintenance ........... 43
3. Preparatory work ................. 45
4. Maintenance procedures ............. 46
4.1 MCH - Mechanism .............. 46
4.1.1 MCH-I - Correct working
and lubricating.............. 46
4.1.2 MCH-II - The seals ........... 48
4.1.3 MCH-III - The position ......... 50
4.2 SCK - Shock-absorbing system......... 51
4.3 CTS - Arc chutes .................. 52
4.4 MNC - Main contacts .............. 53
4.4.1 MNC-I - Visual.............. 53
4.4.2 MNC-II - Sequence........... 54
4.5 DWT - Draw-out system ............. 55
4.5.1 DWT-I - Right working
of draw-out system ........... 55
4.5.2 DWT-II Insulation shutter........ 56
4.5.3 DWT-III Cluster contacts........ 57
4.5.4 DWT-IV Sliding aux contacts..... 58
4.5.5 DWT-V Clean and Lubricant
draw-out chassis............. 59
4.5.6 DWT-VI Draw-out mechanism .... 59
4 .6 TRM - Power terminals .............. 60
4.7 AXL - Auxiliary ................... 62
4.7.1 AXL-I - Visual and wiring check ... 62
4.7.2 AXL-II - Functional Test ......... 62
4.8 ECSR - Motor, UVR, CC, ST .......... 64
4.8.1 ECSR-I - Functional tests ........ 64
4.8.2 ECSR-II - Lubricating of motor gear. 64
4.9 MCSR - Mechanical Accessories ....... 65
4.9.1 MCSR-I - Open position lock .... 65
4.9.2 MCSR-II - Draw-out shutter key lock 65
4.10 NTK - Mechanical interlock........... 67
4.11 PRT - Trip Unit.................... 69
4.12 TSD - Functional test with Test device .... 70
5. Troubleshooting.................... 71
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