A.5
Date Code 20110408 Instruction Manual SEL-551 Relay
Firmware and Manual Versions
Instruction Manual
Section 4
➤ Removed the separate Relay Word bit table for the SEL-551C, showing Relay Word bits IN1–IN6 and OUT1–
OUT3 for the new digital I/O mix and latch bit outputs LT1–LT8.
➤ Removed programmable software and hardware alarm Relay Word bits SALARM and HALARM, respec-
tively, for the SEL-551C.
➤ Removed additional set and reset SELOGIC settings to the Setting Sheets for latch bits LT1–LT8 (SEL-551C
only).
➤ Removed additional settings to the Setting Sheets for the optional front-panel EIA-232 serial communications
port for the SEL-551C.
➤ Added example for a CT ration of 600/5, set CTR = 120.
➤ Added 0.1 increment information to Overcurrent Elements.
Section 5
➤ Removed details concerning the optional front-panel EIA-232 serial communications port for the SEL-551C.
➤ Removed explanation on the factory settings listed in SHO Command (Showset) that differ for the new
SEL-551C, compared to the SEL-551.
➤ Under TAR Command (Target), removed separate Relay Word bit table for the SEL-551C, showing Relay
Word bits IN1–IN6 and OUT1-OUT3 for the new digital I/O mix and latch bit outputs LT1–LT8.
➤ Removed programmable software and hardware alarm Relay Word bits SALARM and HALARM, respec-
tively, for the SEL-551C.
➤ Added TAR14 row to Table 5.6.
Section 7
➤ Removed the rearrangement of digital I/O columns in the event report for the new SEL-551C.
➤ Removed the number of rows available in the SER for the SEL-551C relay.
Section 8
➤ In Relay Self-Tests, removed the programmable alarm output contact feature in the SEL-551C.
Appendix A
➤ Updated Instruction Manual Revision History to note the splitting of the SEL-551 and the SEL-551C instruc-
tion manual.
Appendix B
➤ Added Firmware upgrade information to SEL-551R108/ SEL-551-R507 to include note 'Made internal
changes to support battery-backed clock hardware change'.
Appendix D
➤ Removed DNA message for the SEL-551C.
20070301
Appendix A
➤ Updated for firmware version R512 for the SEL-551.
➤ Updated for firmware version R503 for the SEL-551C.
20061005
Section 3
➤ Added additional phase pickup settings to the lists of phase pickup settings which cause the A, B, and C target
LEDs to illuminate in the Front-Panel Target LEDs subsection.
Appendix A
➤ Updated for firmware version R111 and R511 for the SEL-551.
➤ Updated for firmware version R502 for the SEL-551C.
20050725
Entire Manual
➤ Updated format of instruction manual.
Section 2
➤ Updated rear-panel drawing (Figure 2.8).
➤ Updated Output Contact OUT4 Control Jumper Location drawing (Figure 2.12).
➤ Updated Table 2.2: Required Position of Jumper JMP13 for Desired Output Contact OUT4 Operation.
Section 8
➤ Updated Figure 8.2: Relay Part Number and Hardware Identification Sticker.
Table A.2 Instruction Manual Revision History (Sheet 3 of 8)
Revision Date Summary of Revisions
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