4-12 Event Reporting Date Code 20011026
SEL-321/321-1 Instruction Manual
FIRMWARE IDENTIFICATION
The SEL-321 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],
Where:
[PN] = Product Name (e.g., SEL-321)
[RN] = Revision Number (e.g., 100)
[VS] = Version Specifications (e.g., 656112)
[RD] = Release Date (e.g., YYYYMMDD = 20000401)
For the SEL-321 Relay, version specifications are interpreted as follows:
V[VS] = V[ABCDEFG]
Option
Specifier Specifier Meaning Option Description
A 5, 6 50 Hz, 60 Hz Power System Frequency
B 1, 5 1 A, 5 A Nominal A per Phase
C 6 67 volts Nominal Volts per Phase
D 1 Standard 300 Front Panel Type
E 1, 2 1 bank, 2 banks Number of Banks of Digital Inputs
F 2, 4 2 banks, 4 banks Number of Banks of Contact Outputs
G p, n abc, acb Phase Rotation Sequence
Please contact Schweitzer Engineering Laboratories for more information concerning available
versions of the relay (see Factory Assistance in Section 7: Maintenance and Testing). Version
specifications provided above are not intended for ordering purposes but to help users identify
software installed in a relay.
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