A.14
SEL-751 Relay Instruction Manual Date Code 20170927
Firmware, ICD, and Manual Versions
Instruction Manual
Section 4
➤
Updated Table 4.3: Voltage Configuration Settings, VNOM Range Check, and Fault Location.
➤ Updated Figure 4.2: Instantaneous Overcurrent Element Logic.
➤ Updated Table 4.12: A-, B-, and C-Phase Time-Overcurrent Settings, Table 4.13: Maximum Phase Time-
Overcurrent, Table 4.14: Negative-Sequence Time-Overcurrent Settings, Table 4.15: Neutral Time-Overcurrent
Settings, and Table 4.16: Residual Time-Overcurrent Settings.
➤ Added a note for Figure 4.38: Positive-Sequence Voltage-Polarized Directional Element for Phase Overcurrent
Elements.
➤ Updated HIF Detection Settings; updated Table 4.28: High-Impedance Fault (HIF) Detections Settings and
Table 4.29: HIF Relay Word Bits and added Example 4.12: HIFITUNE Operation.
➤ Updated Second- and Fifth-Harmonic Blocking Logic, including Figure 4.58: Three-Phase Second- and Fifth-
Harmonic Blocking Logic.
➤ Updated Table 4.51: Trip/Close Logic Settings.
➤ Updated Loss-of-Potential (LOP) Protection, including Figure 4.73: Loss-of-Potential (LOP) Logic, and added
Table 4.46: Loss-of-Potential (LOP) Setting.
➤ Updated 52A and 52B Breaker Status SELOGIC Control Equations and added a notes for disconnect switch
status SEL
OGIC and local/remote breaker control.
➤ Updated Global Settings (SET G Command), General Settings, including Table 4.65: General Global Settings
for METHRES.
➤ Updated Arc-Flash Time-Overlight Elements (TOL1 through TOL8), including Table 4.73: Arc-Flash Time-
Overlight Settings.
➤ Updated DC Mode Processing (DC Control Voltage), including Figure 4.109: DC Mode Processing.
➤ Added 89A and 89B Disconnect Switch Status SELOGIC Control Equations and Local/Remote Breaker Control.
➤ Updated Port Settings (SET P Command), including Table 4.83: Ethernet Port Settings.
➤ Added Port Numbers Must be Unique.
➤ Added a note on the Port 2 option to PORT 2.
➤ Updated Front-Panel Settings (SET F Command), General Settings.
➤ Updated Table 4.90: Display Point and Local Bit Default Settings, Table 4.91: LCD Display Settings,
Table 4.92: Settings That Always, Never, or Conditionally Hide a Display Point, Table 4.97: Example Settings
and Displays, Table 4.98: Target LED Settings, and Table 4.99: Pushbutton LED Settings.
➤ Updated Local Bits and Target LE Ds.
➤ Added Touchscreen Settings.
Section 5
➤
Updated Table 5.1: Measured Fundamental Meter Values, Table 5.4: Maximum/Minimum Meter Values,
Table 5. 5: RMS Meter Values, Table 5.6: Demand Values, and Table 5.7: Synchrophasor Measure Values.
➤ Updated Figure 5.2: METER Command Report With Voltage/Arc-Flash Detection 2 AVI/4 AFDI Card in Slot E
and 4 ACI/3 AVI Card in Slot Z.
➤ Updated Energy Metering, Synchrophasor Metering, and Small Signal Cutoff for Metering.
Section 6
➤
Updated Overview.
➤ Updated View/Change Settings With Two-Line Front Panel and added View/Change Settings With Touchscreen
Front Panel.
➤ Updated Settings Sheets.
Section 7
➤
Updated Table 7.1: Communications Port Interfaces.
➤ Updated Serial (EIA-232 and EIA-485) Port.
➤ Updated Fiber-Optic Serial Port and Option 3: Port 2 (Fiber-Optic Serial Port).
➤ Updated File Transfer Protocol (FTP) and MMS File Transfer.
➤ Updated CEV HIF (High-Impedance Fault Command) command response.
➤ Updated CLOSE Command (Close Breaker), OPEN Command (Open Breaker), and GOOSE Command.
➤ Updated Table 7.31: Meter Command, Table 7.32: Meter Class, Table 7.45: STATUS Command Report and
Definitions, Table 7.52: TIME Command (View/Change Time), Table 7.56: FTP and MMS Virtual File
Structure, and Table 7.60: Files Available for Ymodem Protocol.
➤ Updated SER Command (Sequential Events Recorder Report) and added HMI Directory (Read and Write).
Table A.8 Instruction Manual Revision History (Sheet 2 of 9)
Revision Date Summary of Revisions
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