13-44
Testing and Troubleshooting
Date Code 20011205
SEL-311A Instruction Manual
Table 13.5: Relay Self-Tests
Self-Test
Condition
Limits
Protection
Disabled
ALARM
Output
Description
IA, IB, IC,
IP, VA, VB,
VC, Offset
Warning
30 mV
No
Pulsed
Measures the dc offset at
each of the input
channels every 10
seconds.
Master
Offset
Warning
20 mV
No
Pulsed
Measures the dc offset at
the A/D every 10
seconds.
Failure
30
mV
Yes
Latched
+5 V PS
Warning
+4.80 V
+5.20 V
No
Pulsed
Measures the +5 V power
supply every 10 seconds.
Failure
+4.65
V
+5.40 V
Yes Latched
+5 V REG
Warning
+4.75 V
+5.20 V,
-4.75 V
-5.25 V
No
Pulsed
Measures the regulated
5 V power supply every
10 seconds.
Failure
+4.50
V
+5.40 V,
-4.50 V
-5.50 V
Yes Latched
+12 V PS
Warning
+11.50 V
+12.50 V
No
Pulsed
Measures the 12 V power
supply every 10 seconds.
Failure
+11.20 V
+14.00 V
Yes Latched
+15 V PS
Warning
+14.40 V
+15.60 V
No
Pulsed
Measures the 15 V power
supply every 10 seconds.
Failure
+14.00 V
+16.00 V
Yes Latched
TEMP Warning
-40
°
C
+85
°
C
No
Measures the temperature
at the A/D voltage
reference every 10
seconds.
Failure
-50
°
C
+100
°
C
Yes Latched
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