A.2
SEL-751 Relay Instruction Manual Date Code 20170927
Firmware, ICD, and Manual Versions
Firmware
SEL-751-R200-V2-Z007003-D20170315 ➤ Added the touchscreen display front-panel option. 20170315
➤ Added the four-pushbutton front-panel option.
➤ Added support for an ac currents only (4 ACI) Slot Z card option.
➤ Increased the maximum number of GOOSE subscriptions to 64.
➤ Added a setting, METHRES, in the Global settings category that
allows for turning off the squelching of currents and voltages below a
certain level.
➤ Increased the maximum allowable value of the VNOM setting from
440Vrms to 480Vrms.
➤ Increased the TOL pickup setting to 80% for both the point- and bare-
fiber sensors.
➤ Revised the firmware to remove MAXACC front-panel setting for
relays with the touchscreen display.
➤ Resolved an issue with the Modbus registers for phase/phase-to-phase
max/min voltages that retained a previous value when the DELTA_Y
setting was changed.
➤ Revised the LOP threshold from 5 V to 10.5 V (higher than the
frequency tracking threshold of 10 V). Added LOPBLK SEL
OGIC that
is tied into seal-in logic to break the seal (reset LOP) under user-
defined conditions.
➤ Resolved an issue with LSENS1–LSENS8 analog quantities reading
bad values when assigned to math variables with over 50% light
applied.
➤ Expanded the range of the TOC element to include a time dial setting
of 0.01 for the C curves.
➤ Added support for communications cards without the fiber-optic serial
port in Slot B.
➤ Resolved an issue with changing phase angles even though the
magnitude/angles of the analog channels were squelched.
➤ Revised the breaker failure setting dependency to allow BFD to be set
to 0.0 when ATD := OFF.
➤ Resolved an issue with the analog quantity for frequency getting reset
to 0 after a settings change.
➤ Added a decimal point to CEV HIF current-related quantities.
➤ Added disconnect status logic with double point indication to monitor
the status of the disconnect switches.
➤ Resolved an issue where the relay does not detect a 4 DI/4 DO card
installed in a slot previously occupied by a 14 DI card.
➤ Added Modbus Master IP settings.
➤ Added new SELOGIC control equation HIFITUNE to reinitiate
24-hour tuning.
SEL-751-R200-V1
➤ SEL-751 R200-V1 was not released. R200-V2 follows R112-V1. —
SEL-751-R200-V0
➤ SEL-751 R200-V0 was not released. R200-V1 follows R112-V1. —
Table A.1 R200 Series Firmware Revision History (Sheet 2 of 2)
Firmware Identification (FID) Number Summary of Revisions
Manual
Date Code
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