Siemens Solkor 7PG2113 Technical Manual page 277

Contents
Section 1: Pilot Wire Current Differential Scheme.................................................................................................... 4
1.1 General ................................................................................................................................................... 4
1.2 Information required when ordering ........................................................................................................ 4
1.3 Equipment Options ................................................................................................................................. 5
1.3.1 Solkor Plain/Overcurrent Protection Schemes .......................................................................... 5
1.3.2 Pilot Supervision 5kV Schemes ................................................................................................ 5
1.3.3 15kV Schemes.......................................................................................................................... 5
1.4 Application Diagrams .............................................................................................................................. 6
1.5 Essential External Wiring and Settings ................................................................................................... 8
1.5.1 Description of Typical Setting file. ............................................................................................. 9
1.6 Application Considerations.................................................................................................................... 11
1.6.1 Overcurrent Guard .................................................................................................................. 11
1.6.2 5/15kV Isolation Voltage ......................................................................................................... 11
1.6.3 Pilot Cables............................................................................................................................. 11
1.6.4 Pilot Supervision ..................................................................................................................... 12
1.6.5 Injection Intertripping............................................................................................................... 12
1.6.6 Capacitive Charging Currents ................................................................................................. 13
1.6.7 N/N1 Setting............................................................................................................................ 13
1.6.8 In-Zone Tapped Load (Bleed-Off) ........................................................................................... 13
Section 2: Additional Functions.............................................................................................................................. 14
2.1 Multiple Settings Groups ....................................................................................................................... 14
2.2 Binary Inputs ......................................................................................................................................... 15
2.2.1 Alarm and Tripping Inputs ....................................................................................................... 15
2.2.2 The Effects of Capacitance Current ........................................................................................ 16
2.2.3 AC Rejection ........................................................................................................................... 16
2.3 Binary Outputs ...................................................................................................................................... 18
2.4 LEDs ..................................................................................................................................................... 18
Section 3: Protection Functions ............................................................................................................................. 19
3.1 Time delayed overcurrent (51/51G/51N)............................................................................................... 19
3.1.1 Selection of Overcurrent Characteristics................................................................................. 20
3.1.2 Reset Delay ............................................................................................................................ 21
3.2 Voltage dependent overcurrent (51V) ................................................................................................... 22
3.3 Cold Load Settings (51c)....................................................................................................................... 22
3.4 Instantaneous Overcurrent (50/50G/50N) ............................................................................................. 23
3.5 Directional Protection (67)..................................................................................................................... 24
3.5.1 2 Out of 3 Logic....................................................................................................................... 26
3.6 Directional Earth-Fault (50/51G, 50/51N, 51/51SEF)............................................................................ 27
3.7 High Impedance Restricted Earth Fault Protection (64H) ..................................................................... 28
3.8 Negative Phase Sequence Overcurrent (46NPS) ................................................................................. 29
3.9 Undercurrent (37).................................................................................................................................. 30
3.10 Thermal Overload (49) .......................................................................................................................... 30
3.11 Under/Over Voltage Protection (27/59) ................................................................................................. 31
3.12 Neutral Overvoltage (59N) .................................................................................................................... 32
3.12.1 Application with Capacitor Cone Units .................................................................................... 33
3.12.2 Derived NVD Voltage .............................................................................................................. 33
3.13 Negative Phase Sequence Overvoltage (47) ........................................................................................ 33
Section 4: CT Requirements .................................................................................................................................. 34
4.1 CT Requirements for Current Differential Protection............................................................................. 34
4.1.1 Example Fault Current Estimation .......................................................................................... 35
4.2 CT Requirements for Overcurrent and Earth Fault Protection .............................................................. 37
4.2.1 Overcurrent Protection CTs .................................................................................................... 37
4.2.2 Earth Fault Protection CTs...................................................................................................... 37
4.3 CT Requirements for High Impedance Restricted Earth Fault Protection ............................................. 37
Section 5: Control Functions .................................................................................................................................. 38
5.1 Auto-reclose Applications...................................................................................................................... 38
5.1.1 Auto-Reclose Example 1......................................................................................................... 39
5.1.2 Auto-Reclose Example 2 (Use of Quicklogic with AR) ............................................................ 40
5.2 Quick Logic Applications ....................................................................................................................... 41
5.2.1 Auto-Changeover Scheme Example ....................................................................................... 41
Section 6: Supervision Functions........................................................................................................................... 42
6.1 Circuit-Breaker Fail (50BF) ................................................................................................................... 42
6.1.1 Settings Guidelines ................................................................................................................. 42
6.2 Current Transformer Supervision .......................................................................................................... 44
6.3 Voltage Transformer Supervision (60VTS) ........................................................................................... 45
6.4 Trip/Close Circuit Supervision (74T/CCS)............................................................................................. 46
6.4.1 Trip Circuit Supervision Connections ...................................................................................... 46
©2010 Siemens Protection Devices Limited
7PG2113/4/5/6 Solkor Applications Guide
Chapter 7 Page 2 of 49