Sel 411L - Page 25

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Date Code 20151029 SEL-411L Relay
List of Figures
Figure 3.28 Providing Extra Security for Critical 87L Communications Bits Used for Unconditional
Tripping (a Combination of Delay and Disturbance Detection Supervision)........................ P.3.53
Figure 3.29 Providing Extra Security for Critical 87L Communications Bits Used for
Unconditional Tripping (Two Bits Used)...................................................................... P.3.53
Figure 3.30 External Fault Detection Logic—AC Path and Reset....................................................... P.3.56
Figure 3.31 External Fault Detection Logic—DC Path........................................................................ P.3.57
Figure 3.32 External Fault Detection Logic—Communications.......................................................... P.3.58
Figure 3.33 External Fault Detection Logic—Usage in the 87L Elements.......................................... P.3.59
Figure 3.34 Disturbance Detection Logic Responding to Local and Remote Signals, Stub Bus,
and Test Mode................................................................................................................ P.3.61
Figure 3.35 Disturbance Detection Logic Responding to Local Current and Voltage Signals ............ P.3.62
Figure 3.36 Disturbance Detection Logic Responding to Remote Currents........................................ P.3.63
Figure 3.37 Adaptive Disturbance Detection Algorithm...................................................................... P.3.64
Figure 3.38 Extended Security Switchover Logic for the Alpha Plane Settings.................................. P.3.67
Figure 3.39 Open CT Detection Logic ................................................................................................. P.3.70
Figure 3.40 Line Charging Current Compensation Control Logic....................................................... P.3.73
Figure 3.41 Line Charging Current Calculations and Removal ........................................................... P.3.74
Figure 3.42 Augmenting Restraint Terms for Finite Accuracy of Line Charging Current
Compensation at Higher Frequencies............................................................................ P.3.75
Figure 3.43 Sample Three-Terminal Relay Application....................................................................... P.3.78
Figure 3.44 Sample Three-Terminal Relay Application With In-Line Transformer............................ P.3.82
Figure 3.45 Harmonic Sensing Logic................................................................................................... P.3.87
Figure 3.46 Magnetizing Inrush and Overexcitation Blocking Logic.................................................. P.3.88
Figure 3.47 87LP Logic in Applications With In-Line Transformers.................................................. P.3.91
Figure 3.48 87LP Alpha Plane Concept With Harmonic Restraint...................................................... P.3.92
Figure 3.49 87LQ Logic In Applications With In-Line Transformers ................................................. P.3.94
Figure 3.50 Level 1 Watchdog Monitor Diagram................................................................................. P.3.98
Figure 3.51 Level 2 Watchdog Monitor Diagram................................................................................. P.3.99
Figure 3.52 Phase Elements Operating Times—Serial Communication............................................ P.3.100
Figure 3.53 Negative-Sequence Elements Operating Times—Serial Communication....................................P.3.100
Figure 3.54 Zero-Sequence Elements Operating Times—Serial Communication............................. P.3.101
Figure 3.55 Phase Elements Operating Times—Ethernet Communication ....................................... P.3.101
Figure 3.56 Negative-Sequence Elements Operating Times—Ethernet Communication.................. P.3.102
Figure 3.57 Zero-Sequence Elements Operating Times—Ethernet Communication......................................P.3.102
Figure 3.58 Power System Used for CT Selection Example.............................................................. P.3.103
Figure 3.59 Simulation of CT Transient Response on the 600:5 Tap................................................. P.3.106
Figure 3.60 Current and Voltage Source Connections for the Relay.................................................. P.3.107
Figure 3.61 Main and Alternate Line Current Source Assignments .................................................. P.3.107
Figure 3.62 Combined Currents for Line Current Source Assignment.............................................. P.3.108
Figure 3.63 Breaker Current Source Assignments ............................................................................. P.3.108
Figure 3.64 ESS := 1, Single Circuit Breaker Configuration ............................................................. P.3.113
Figure 3.65 ESS := 2, Single Circuit Breaker Configuration ............................................................. P.3.113
Figure 3.66 ESS := 3, Double Circuit Breaker Configuration............................................................ P.3.114
Figure 3.67 ESS := 4, Double Circuit Breaker Configuration............................................................ P.3.115
Figure 3.68 Tapped EHV Overhead Transmission Line..................................................................... P.3.116
Figure 3.69 ESS := Y, Tapped Line.................................................................................................... P.3.117
Figure 3.70 ESS := Y, Single Circuit Breaker With Current Polarizing Source Tapped
Power Transformer ...................................................................................................... P.3.118
Figure 3.71 SEL-411L Alpha Quantity Calculation........................................................................... P.3.121
Figure 3.72 Sample TEC Command Response .................................................................................. P.3.123
Figure 3.73 Sample TEC n Command Response ............................................................................... P.3.123
Figure 3.74 Relay Exchanging TW Peak Information Via 87L Communications Channel............... P.3.125
Figure 3.75 Summary Command Output Showing the TW Fault Location Result.........................................P.3.126
Figure 3.76 Simplified Equivalent Network for Fault Location in Two-Terminal Lines ................... P.3.127
Figure 3.77 Fault Location on Three-Terminal Lines......................................................................... P.3.128
Figure 3.78 Fault Location on Four-Terminal Lines .......................................................................... P.3.129
Figure 3.79 Line With Two TAP Points.............................................................................................. P.3.132
Figure 3.80 Pole Open Logic Diagram............................................................................................... P.3.136