2.11.1
2.11.2
2.12 Undercurrent (37)................................................................................................................................ 50
2.13 Thermal Overload (49) .......................................................................................................................... 52
2.14 Over/Under Voltage .............................................................................................................................. 54
2.14.1
2.14.2
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
3.1 CB Fail (50BF) ..................................................................................................................................... 60
3.1.1
Element Blocking .................................................................................................................... 61
3.2.1
1 or 2 Phase VT fail ................................................................................................................ 62
3.2.2
3 Phase VT fail........................................................................................................................ 63
3.3.1
7PG2113 & 7PG2115 ............................................................................................................. 64
3.3.2
7PG2114 & 7PG2116 ............................................................................................................. 65
3.4 Broken Conductor (46BC)................................................................................................................... 66
4.1 Autoreclose (79).................................................................................................................................... 70
4.2 Quick Logic ........................................................................................................................................... 70
5.1 Periodic Tests ....................................................................................................................................... 71
5.2 Maintenance ......................................................................................................................................... 71
5.3 Troubleshooting .................................................................................................................................... 71
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
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
6.3.7
6.3.8
6.3.9
6.3.10
Stability tests........................................................................................................................... 76
6.3.11
Putting into service.................................................................................................................. 76
6.3.12
Notes ...................................................................................................................................... 76
©2010 Siemens Protection Devices Limited
7PG2113/4/5/6 Commissioning & Maintenance
(46DT)................................................................................ 48
Chapter 6 Page 3 of 77