Date Code 20010731
Metering and Monitoring
6-11
SEL-352-1, -2 Instruction Manual
Self-Testing Alarms
Table 6.2 summarizes all of the self-test warning and failure limits. Each self-test is described in
Section 11: Testing and Troubleshooting
.
Table 6.2: Self-Test Summary
Self-Test
Warning Limits
Failure Limits
Channel Offset
30 mVdc
NA
Master Offset
20 mVdc
30 mVdc
+5 V Power Supply
4.80/5.20 Vdc
4.65/5.40 Vdc
+5 V Regulated
4.75/5.20 Vdc
4.50/5.40 Vdc
–5 V Regulated
–4.75/–5.25 Vdc
–4.50/–5.40 Vdc
+12 V Power Supply
11.50/12.50 Vdc
11.20/14.00 Vdc
–12 V Power Supply
–11.50/–12.50 Vdc
–11.20/–14.00 Vdc
+15 V Power Supply
14.40/15.60 Vdc
14.00/16.00 Vdc
–15 V Power Supply
–14.40/–15.60 Vdc
–14.00/–16.00 Vdc
Temperature
–40/85
C
–50/100
C
RAM NA
Cannot
READ/WRITE
Flash ROM
NA
Bad Checksum
A/D NA
Slow
Conversion
Critical RAM
NA
Bad Checksum
EEPROM NA
Bad
Checksum
IO_BRD
NA
Incorrect I/O Board Value
The relay continuously runs a variety of self-tests. Some tests have warning and failure states;
others only have failure states. Warnings and failures are identified by the following:
Warnings
Represented by a “W” in the status report
Generate an automatic serial-port message
Pulse the ALARM output contact for five seconds
Failures
Represented by an “F” in the status report
Generate an automatic serial-port message
Displays a front-panel message
Closes and latches the ALARM output contact
Disables relay, freezes in current state
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