xii List of Figures
SEL-351A Relay Instruction Manual Date Code 20080213
Figure 7.18 SCADA Contact Pulses Input IN105 to Switch Active Setting Group Between
Setting Groups 1 and 4......................................................................................................7.20
Figure 7.19 SEL
OGIC Control Equation Variable Timer SV8T Used in Setting Group Switching .........7.20
Figure 7.20 Active Setting Group Switching (With Single Input) Time Line .........................................7.22
Figure 7.21 Rotating Selector Switch Connected to Inputs IN101, IN102, and IN103 for
Active Setting Group Switching .......................................................................................7.23
Figure 7.22 Active Setting Group Switching (With Rotating Selector Switch) Time Line.....................7.25
Figure 7.23 SEL
OGIC Control Equation Variables/Timers SV1/SV1T–SV6/SV6T................................7.27
Figure 7.24 SEL
OGIC Control Equation Variables/Timers SV7/SV7T–SV16/SV16T............................7.28
Figure 7.25 Dedicated Breaker Failure Scheme Created With SEL
OGIC
Control Equation Variables/Timers...................................................................................7.29
Figure 7.26 Logic Flow for Example Output Contact Operation ............................................................7.33
Figure 7.27 Traditional Panel Light Installations.....................................................................................7.34
Figure 7.28 Rotating Default Display Replaces Traditional Panel Light Installations............................7.35
Figure 8.1 Plotted Breaker Maintenance Points for a 25 kV Circuit Breaker..........................................8.3
Figure 8.2 SEL-351A Breaker Maintenance Curve for a 25 kV Circuit Breaker....................................8.5
Figure 8.3 Operation of SEL
OGIC Control Equation Breaker Monitor Initiation Setting........................8.6
Figure 8.4 Breaker Monitor Accumulates 10 Percent Wear ....................................................................8.8
Figure 8.5 Breaker Monitor Accumulates 25 Percent Wear ....................................................................8.9
Figure 8.6 Breaker Monitor Accumulates 50 Percent Wear ..................................................................8.10
Figure 8.7 Breaker Monitor Accumulates 100 Percent Wear ................................................................8.11
Figure 8.8 Input IN106 Connected to Trip Bus for Breaker Monitor Initiation ....................................8.14
Figure 8.9 DC Under- and Overvoltage Elements .................................................................................8.15
Figure 8.10 Create DC Voltage Elements With SEL
OGIC Control Equations .........................................8.16
Figure 8.11 Response of Thermal and Rolling Demand Meters to a Step Input
(setting DMTC = 15 minutes)...........................................................................................8.21
Figure 8.12 Voltage V
S
Applied to Series RC Circuit .............................................................................8.22
Figure 8.13 Demand Current Logic Outputs ...........................................................................................8.25
Figure 8.14 Raise Pickup of Residual-Ground Time-Overcurrent Element for Unbalance Current .......8.25
Figure 9.1 U.S. Moderately Inverse Curve: U1 .......................................................................................9.6
Figure 9.2 U.S. Inverse Curve: U2...........................................................................................................9.7
Figure 9.3 U.S. Very Inverse Curve: U3 ..................................................................................................9.8
Figure 9.4 U.S. Extremely Inverse Curve: U4 .........................................................................................9.9
Figure 9.5 U.S. Short-Time Inverse Curve: U5......................................................................................9.10
Figure 9.6 I.E.C. Class A Curve (Standard Inverse): C1 .......................................................................9.11
Figure 9.7 I.E.C. Class B Curve (Very Inverse): C2 ..............................................................................9.12
Figure 9.8 I.E.C. Class C Curve (Extremely Inverse): C3 .....................................................................9.13
Figure 9.9 I.E.C. Long-Time Inverse Curve: C4....................................................................................9.14
Figure 9.10 I.E.C. Short-Time Inverse Curve: C5 ...................................................................................9.15
Figure 9.11 Operation of DELTA and 3V0 Relay Word Bits ..................................................................9.38
Figure 9.12 Hybrid Power System With Neutral-Ground Resistor..........................................................9.40
Figure 10.1 DB-9 Connector Pinout for EIA-232 Serial Ports ................................................................10.2
Figure 11.1 Front-Panel Pushbuttons—Overview ...................................................................................11.2
Figure 11.2 Front-Panel Pushbuttons—Primary Functions .....................................................................11.3
Figure 11.3 Front-Panel Pushbuttons—Primary Functions (continued)..................................................11.4
Figure 11.4 Front-Panel Pushbuttons—Secondary Functions .................................................................11.5
Figure 11.5 Local Control Switch Configured as an ON/OFF Switch ....................................................11.8
Figure 11.6 Local Control Switch Configured as an OFF/MOMENTARY Switch ................................11.8
Figure 11.7 Local Control Switch Configured as an ON/OFF/MOMENTARY Switch..........................11.8
Figure 12.1 Example Event Summary .....................................................................................................12.4
Figure 12.2 Example Synchrophasor-Level Precise Event Report 1/16-Cycle Resolution.....................12.8
Figure 12.3 Example Standard 15-Cycle Event Report 1/4-Cycle Resolution (Wye-Connected PTs) .12.26
Figure 12.4 Example Partial Event Report with Delta-Connected PTs .................................................12.27
Figure 12.5 Derivation of Event Report Current Values and RMS Current Values From
Sampled Current Waveform............................................................................................12.28
Figure 12.6 Derivation of Phasor RMS Current Values From Event Report Current Values ................12.29
Figure 12.7 Example Sequential Events Recorder (SER) Event Report................................................12.30
Figure 13.1 Low-Level Test Interface (J1 or J10) Connector ..................................................................13.6
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