Schweitzer Engineering Laboratories SEL-701 - Page 236

701 Motor Protection Relay Date Code 20010719
Maintenance & Troubleshooting
Self-Testing
10.4
Table 10.2 Relay Self-Tests (Continued)
Self-Test Description Limits
Protection
Disabled
on Failure
ALARM
Output
on Failure
Front-Panel
Message
on Failure
–5 V PS
Measures the
–5 V power
supply.
–4.65 V
–5.40 V
Yes Latched –5V FAILURE
+15 V PS
Measures the
+15 V power
supply.
+14.00 V
+16.00 V
Yes Latched +15V FAILURE
+28 V PS
Measures the
+28 V power
supply.
+24.00 V Yes Latched +28V FAILURE
TEMP Measures the
temperature at
the A/D voltage
reference.
–50ºC
+100ºC
Yes Latched TEMPERATURE
FAILURE
RAM Performs a
read/write test
on system RAM.
Yes Latched RAM FAILURE
ROM Performs a
checksum test
on the relay
program
memory.
Checksum Yes Latched ROM FAILURE
CR_RAM Performs a
checksum test
on the active
copy of the relay
settings.
Checksum Yes Latched CR_RAM
FAILURE
EEPROM Performs a
checksum test
on the
nonvolatile copy
of the relay
settings.
Checksum Yes Latched EEPROM
FAILURE
(Continued)