Sel 551 - Instruction Manual

A.3
Date Code 20110408 Instruction Manual SEL-551 Relay
Firmware and Manual Versions
Instruction Manual
Instruction Manual
The date code at the bottom of each page of this manual reflects the creation
or revision date.
Table A.2 lists the instruction manual release dates and a description of
modifications. The most recent instruction manual revisions are listed at the
top.
➤ Added serial port and front-panel commands to access demand
ammeter data [see MET D Command (Demand Ammeter) in
Section 5: Serial Port Communications and Commands].
➤ Added Fast Meter messages A5C2, A5D2, A5C3, A5D3 for
demand ammeter data.
➤ Increased the number of digital banks in the A5C1 message.
Added demand ammeter Relay Word bits to the Compressed
ASCII DNA command (see Appendix C: Configuration, Fast
Meter, and Fast Operate Commands).
Modified Recloser Logic:
Relay goes to the Lockout State for Open Command execution [see
OPE Command (Open) in Section 5: Serial Port Communications
and Commands].
SEL-551-R503-Vf-D961211
➤ Decreased power-up initialization time.
a
SEL-551-R502-Vf-D961012 ➤ Removed quotation marks from ID message Modbus ID field
(see Appendix C).
a
SEL-551-R104-Vr-D960528
SEL-551-R501-Vf-D960528
➤ Simplified operation of front panel functions under the {CNTRL}
pushbutton.
➤ Removed password requirement for local control switches.
a
SEL-551-R103-Vr-D960322 Corrected use of the “^” character in the SET command.
a
SEL-551-R101-Vr-D960322 Initial version.
a
a
Information about changes to earlier versions of the SEL-551 Instruction Manual is not available.
Table A.1 Firmware Revision History (Sheet 3 of 3)
Firmware Identification (FID) Number Summary of Revisions
Manual
Date Code
Table A.2 Instruction Manual Revision History (Sheet 1 of 8)
Revision Date Summary of Revisions
20110408
Section 3
➤ Corrected Figure 3.14: Close Logic.
➤ Added additional requirements to logic used to illuminate A, B, C, and N target LEDs in Front-Panel Target
LEDs.
Appendix A
➤ Updated for firmware version R514.
20100630
Section 1
➤ Updated timing accuracy information in Overcurrent Elements.