Table Of Contents - Siemens 7PG2113 Technical Manual

Contents
Section 1: Common Functions ................................................................................................................................. 6
1.1 Overview ................................................................................................................................................. 6
1.2 Before Testing......................................................................................................................................... 6
1.2.1 Safety........................................................................................................................................ 6
1.2.2 Sequence of Tests .................................................................................................................... 6
1.2.3 Test Equipment......................................................................................................................... 7
1.2.4 Use of PC to facilitate testing .................................................................................................... 7
1.2.5 Precautions ............................................................................................................................... 7
1.2.6 Inspection.................................................................................................................................. 8
1.2.7 Applying Settings ...................................................................................................................... 8
1.3 Tests ....................................................................................................................................................... 8
1.3.1 Secondary Injection Tests......................................................................................................... 8
1.3.2 Primary Injection Tests.............................................................................................................. 8
1.3.3 Secondary wiring insulation-resistance test .............................................................................. 9
1.3.4 Current-transformer ratio and polarity tests............................................................................... 9
1.3.5 Pilot Insulation-resistance test ................................................................................................ 10
1.3.6 Pilot-loop resistance tests ....................................................................................................... 10
1.3.7 Pilot connection check ............................................................................................................ 11
1.3.8 Putting into Service ................................................................................................................. 12
1.4 Current Differential (87)......................................................................................................................... 12
1.4.1 Stability Tests.......................................................................................................................... 13
1.4.2 Alternative tests if primary injection equipment is not available .............................................. 15
1.4.3 Check of fault settings by secondary injection ........................................................................ 15
1.4.4 Current transformer ratio and polarity tests............................................................................. 16
1.4.5 Check of secondary connections ............................................................................................ 17
1.5 AC Energising Quantities ...................................................................................................................... 17
1.6 Binary Inputs ......................................................................................................................................... 18
1.6.1 Connections for use in Solkor R Mode.................................................................................... 19
1.7 Binary Outputs ...................................................................................................................................... 20
1.8 Relay Case Shorting Contacts .............................................................................................................. 20
Section 2: Protection Functions ............................................................................................................................. 21
2.1 Current Differential (87)......................................................................................................................... 22
2.2 Phase Directional Polarity Check .......................................................................................................... 22
2.2.1 2 out of 3 logic......................................................................................................................... 24
2.3 Phase Overcurrent (67/50,67/51).......................................................................................................... 24
2.3.1 Definite Time Overcurrent
2.3.2 Inverse Time Overcurrent (51) .............................................................................................. 25
2.4 Voltage Controlled Overcurrent (51V) ................................................................................................... 27
2.5 Cold Load (51C).................................................................................................................................... 29
2.5.1 Inverse Time Overcurrent (51C) ........................................................................................... 30
2.6 Directional Earth Fault Polarity Check (67N)......................................................................................... 32
2.7 Derived Earth Fault (67/50N, 67/51N)................................................................................................... 33
2.7.1 Directional Polarity .................................................................................................................. 34
2.7.2 Definite Time Overcurrent
2.7.3 Inverse Time Overcurrent (51N) ........................................................................................... 34
2.8 Measured Earth fault (67/50G,67/51G) ................................................................................................. 37
2.8.1 Directional Polarity .................................................................................................................. 38
2.8.2 Definite Time Overcurrent
2.8.3 Inverse Time Overcurrent (67/51G) ...................................................................................... 38
2.9 Sensitive Earth fault (67/50S,67/51S) ................................................................................................... 41
2.9.1 Directional Polarity .................................................................................................................. 42
2.9.2 Definite Time Overcurrent
2.9.3 Inverse Time Overcurrent (51SEF) ....................................................................................... 42
2.10 Restricted Earth fault (64H)................................................................................................................. 45
2.11 Negative Phase Sequence Overcurrent (46NPS) ................................................................................. 47
©2010 Siemens Protection Devices Limited
7PG2113/4/5/6 Commissioning & Maintenance
(50)............................................................................................. 25
(50N) .......................................................................................... 34
(67/50G) ..................................................................................... 38
(50SEF)...................................................................................... 42
Chapter 6 Page 2 of 77