Schweitzer Engineering Laboratories SEL-251 - Firmware Identification

4-10 Event Reporting Date Code 970103
SEL-251, -2, -3 Instruction Manual
FIRMWARE IDENTIFICATION
The SEL-251 Relay provides a means of interpreting Firmware Identification Data (FID). The
FID string is included near the top of each long event report. The string format is as follows:
FID = [PN] - R[RN] - V[VS] - D[RD] - E[ER],
Where:
[PN] = Product Name (e.g., SEL-251)
[RN] = Revision Number (e.g., 408)
[VS] = Version Specifications (e.g., 656rp1rqys)
[RD] = Release Date (e.g., YYMMDD = 930719)
[ER] = Version Specification: EEPROM
For the SEL-251 relay family, version specifications are interpreted as follows:
V[VS] = V[ABCDEFGHIJ]
Option Specifier Specifier Meaning Option Description
A 5, 6 50 Hz, 60 Hz Power System Frequency
B 1, 5 1 amp, 5 amps Nominal Amps per Phase
C 6 120 & 67 volts Nominal Volts Phase-Phase
D r radial Fault Locator type
E p, n positive, negative Phase-Sequence of Power System
F 1 standard Recloser
G r recloser Target LEDs
H q standard Neg.-Seq. OC Elements
I y wye Voltage Connection
J s, e, b standard, extended, Fast Meter Commands
extended w/fast operate
EEPROM version specifications are interpreted as follows:
E[ER] = E[Z]
Option Specifier Specifier Meaning Option Description
Z 1, 2 1 stop bit, 2 stop bits Communications Protocol Stop Bits
Please contact Schweitzer Engineering Laboratories, Inc. for information concerning available
versions of the SEL-251 Relay. Version specifications provided above are not intended for
ordering purposes but to aid in identification of the software installed in a relay.