Seg WIC1-W3 - Page 4

SEG Electronics GmbH Technical Manual WIC1
4 DOK-TD-WIC1E, Rev. M
5.11 Selection of the CT transformation voltage ratio ........................................................................................ 40
5.12 Adjustment instruction for inverse characteristic ........................................................................................ 41
6. Commissioning and Maintenance ................................................................................. 43
6.1.1 Important note ......................................................................................................................................... 43
6.2 Accessories for commissioning work .......................................................................................................... 43
6.3 Criteria to be taken into account for protection devices fed by CTs ........................................................... 44
6.4 Special features for the WIC1 test .............................................................................................................. 44
6.5 Selection of the secondary test system ...................................................................................................... 45
6.6 Checks during commissioning .................................................................................................................... 45
6.6.1 Wiring checks .......................................................................................................................................... 45
6.6.2 WIC1 adjustment .................................................................................................................................... 46
6.7 Functional Test ........................................................................................................................................... 46
6.7.1 Test Currents .......................................................................................................................................... 47
6.7.2 Switching points for the overcurrent steps .............................................................................................. 47
6.7.3 Switching points for the short-circuit step ............................................................................................... 48
6.8 Special features for earth current tests ....................................................................................................... 49
6.8.1 Switching points for the earth current step ............................................................................................. 49
6.9 Test procedure by way of example ............................................................................................................. 50
6.10 Maintenance ............................................................................................................................................... 52
6.10.1 Faults .................................................................................................................................................. 52
6.10.2 Repair work ......................................................................................................................................... 52
7. Product-Specific Features .............................................................................................. 53
7.1 Assignment of terminals ............................................................................................................................. 53
7.1.1 Earthing ................................................................................................................................................... 53
7.2 Current transformer..................................................................................................................................... 54
8. Annex ............................................................................................................................... 55
8.1 Dimensional drawing relay .......................................................................................................................... 55
8.2 Dimensional drawing flag indicator ............................................................................................................. 55
8.3 Order form ................................................................................................................................................... 56
8.4 Commissioning form ................................................................................................................................... 57