A.4
SEL-751 Relay Instruction Manual Date Code 20170927
Firmware, ICD, and Manual Versions
Firmware
➤ Added Second- and Fifth-Harmonic Current Blocking (Inrush Current
Blocking) functionality.
➤ Added fault impedance to the fault location information.
➤ Increased the number of settings groups from 3 to 4.
➤ Added Spanish language support on all communications ports. Also
added an ordering option for a relay with Spanish overlay and Spanish
front-panel HMI.
➤ Added an ordering option for a 14 digital input card in Slots C, D, and E.
➤ Added an ordering option for an 8 Arc-Flash Input card in Slot E.
➤ Added LOP blocking functionality with the default value for LOPBLK
set to 0.
➤ Added OFF to the 50 element, 50PnD, delay setting range.
➤ Added torque-control settings for the frequency (81) and rate-of-
change-of-frequency (81R) elements with the default value set to 1.
➤ Added COMTRADE Events support to the relay.
➤ Added a feature in the CEV report to show the part number and serial
number of the relay.
➤ Added unique reference numbering system for HIS, CHIS, SUM,
CSUM, EVE and CEV reports.
➤ Added OFF to the setting range of failover time setting FTIME to
support fast failover switching in dual Ethernet models.
➤ Added the enable port setting EPORT to all the communications ports
to enhance port security.
➤ Added the MAXACC setting to the front panel to control limited or
full access to the front panel HMI.
➤ Added fault location data to the IEC 61850 ICD file.
➤ Doubled the SELOGIC processing capacity in the relay.
➤ Revised the firmware to add the VSCONN setting allowing the user to
choose between VS input (synchronism check element) and external
3V0 input (broken-delta) for use with zero-sequence voltage polarized
directional elements and fault location.
➤ Revised the firmware to address an issue with Fast Message that did
not report the MIN/MAX analog quantity value correctly.
➤ Resolved an issue that involved phase identification logic where, in some
cases, the phase LEDs did not latch correctly when a trip occurred.
➤ Revised the firmware to remove option D from the NETPORT setting.
➤ Modified the firmware to make the MATHERR Relay Word bit visible.
➤ Resolved a synchrophasor voltage magnitude issue for applied voltages of
200 V or higher with the settings combination FNOM := 50,
MRATE := 25, PHCOMP := Y, and PMAPP := NARROW.
➤ Revised the firmware to address an issue where the oldest 180-cycle
event or HIF event was disappearing from the event history after the
relay was power cycled or restarted with STA C.
➤ Modified the prompt for DNP Master IP Address DNPIPn to
distinguish them from the device IP Address.
SEL-751-R111
➤ SEL-751 R111 was not released. R112 follows R110. —
Table A.2 R100 Series Firmware Revision History (Sheet 2 of 5)
Firmware Identification (FID) Number Summary of Revisions
Manual
Date Code
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