Schweitzer Engineering Laboratories SEL-311L, Instruction Manual, Page: 568 / 734

13-14 Testing, Troubleshooting, and Commissioning Date Code 20010625
SEL-311L Instruction Manual
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Line Current Differential Protection Disabled: The relay disables 87L protection and
deenergizes outputs OUT201–OUT206. Relay Word bit 87LPE deasserts and Relay
Word bit 87HWAL asserts.
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The relay generates automatic STATUS reports at the serial port for warnings and
failures.
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The relay displays failure messages on the relay LCD display for failures.
Use the serial port STATUS command or front-panel STATUS pushbutton to view relay self-test
status.
Table 13.5: Relay Self-Tests
Self-Test Condition Limits
Protection
Disabled
ALARM
Output Description
IA, IB, IC,
IP, VA,
VB, VC,
VS 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