Siemens Solkor 7PG2113 Technical Manual page 201

2.11.1 Definite Time NPS Overcurrent
2.11.2 Inverse Time NPS Overcurrent (46IT) .................................................................................. 48
2.12 Undercurrent (37)................................................................................................................................ 50
2.13 Thermal Overload (49) .......................................................................................................................... 52
2.14 Over/Under Voltage .............................................................................................................................. 54
2.14.1 Phase Under/Over Voltage (27/59) ........................................................................................ 54
2.14.2 Undervoltage Guard (27/59UVG)............................................................................................ 56
2.15 NPS Overvoltage (47) ........................................................................................................................... 56
2.16 Neutral Overvoltage (59N) .................................................................................................................... 58
2.16.1 Definite Time (59NDT) ............................................................................................................ 58
2.16.2 Inverse Time (59NIT) .............................................................................................................. 59
Section 3: Supervision Functions........................................................................................................................... 60
3.1 CB Fail (50BF) ..................................................................................................................................... 60
3.1.1 Element Blocking .................................................................................................................... 61
3.2 Voltage Transformer Supervision (60VTS) ......................................................................................... 62
3.2.1 1 or 2 Phase VT fail ................................................................................................................ 62
3.2.2 3 Phase VT fail........................................................................................................................ 63
3.3 Current Transformer Supervision (60CTS) ......................................................................................... 64
3.3.1 7PG2113 & 7PG2115 ............................................................................................................. 64
3.3.2 7PG2114 & 7PG2116 ............................................................................................................. 65
3.4 Broken Conductor (46BC)................................................................................................................... 66
3.5 Trip/Close Circuit Supervision (74T/CCS)........................................................................................... 68
3.6 Magnetising Inrush Detector (81HBL) ................................................................................................. 69
Section 4: Control & Logic Functions ..................................................................................................................... 70
4.1 Autoreclose (79).................................................................................................................................... 70
4.2 Quick Logic ........................................................................................................................................... 70
Section 5: Testing and Maintenance...................................................................................................................... 71
5.1 Periodic Tests ....................................................................................................................................... 71
5.2 Maintenance ......................................................................................................................................... 71
5.3 Troubleshooting .................................................................................................................................... 71
Section 6: Pilot Supervision Equipment ................................................................................................................. 73
6.1 Introduction ........................................................................................................................................... 73
6.2 Description of equipment ...................................................................................................................... 73
6.3 Commissioning Tests............................................................................................................................ 73
6.3.1 Check of connections.............................................................................................................. 73
6.3.2 Secondary wiring insulation resistance tests........................................................................... 74
6.3.3 Pilot tests ................................................................................................................................ 74
6.3.4 C.T. ratio and polarity.............................................................................................................. 74
6.3.5 Overall fault setting tests......................................................................................................... 74
6.3.6 Check of pilots supervision receive relay ................................................................................ 74
6.3.7 Test of guard relays (where fitted) .......................................................................................... 74
6.3.8 Test of pilot supervision supply failure relay (where fitted)...................................................... 75
6.3.9 Overall tests of pilot supervision equipment............................................................................ 75
6.3.10 Stability tests........................................................................................................................... 76
6.3.11 Putting into service.................................................................................................................. 76
6.3.12 Notes ...................................................................................................................................... 76
©2012 Siemens Protection Devices Limited
7PG2113/4/5/6 Commissioning & Maintenance
(46DT)................................................................................ 48
Chapter 6 Page 3 of 77