Appendix B Troubleshooting Guide - GE Multilin 565 Instruction Manual

Troubleshooting guide.
The 565/575 Relay is fully tested before leaving the factory.
Should the relay seem not to function when power is applied,
first verify that the service LED on the front panel of the relay
is not illuminated. If the service LED is illuminated, contact
Multilin product support. If not, check that all wiring connec-
MALFUNCTION
1. Display does not light up.
2. Display lights but power
up message does not
appear.
3. No phase current
readings displayed.
4. Incorrect phase current
readings displayed.
5. No voltage readings
displayed.
6. Incorrect voltage
readings displayed.
7. Under or Overvoltage
trip relay not energized
by fault condition.
ACTION
1. Check control power voltage and connections at
terminals 62 to 64.
2. Verify that the control voltage is within the limits
indicated on the serial number label which is
found on the side of the relay chassis.
3. Check control power fuses.
4. Check that the relay is fully inserted into the
drawout case.
1. Verify that the control voltage is within the limits
indicated on the serial number which is found on
the side of the relay chassis.
1. Verify that the current readings are selected for
display. Press the ACTUAL VALUES key the LINE
DOWN key to view the messages in actual values
page 1.
2. Verify that the phase current wiring is correct.
3. Perform the phase current input function check.
1. Measure the current flowing into the 565 CT
terminals, using a clamp-on ammeter.
2. Check that the correct phase CT primar y rating
has been entered and stored in setpoints.
1. Verify that the voltage readings are selected for
display. Use the LINE DOWN key to view the
messages in actual values page 6.
2. Verify that the VT wiring connections have been
correctly made.
1. Check that the correct voltage is appearing at the
565 VT terminals.
2. Check that the correct voltage transformer sens-
ing system, nominal secondary voltage and feeder
primary voltage has been entered in setpoints.
1. Check that the under or overvoltage trip is ena-
bled in setpoints.
tions have been correctly made and that all tests are per-
formed in the order listed. If all tests fail to isolate the fault,
contact Multilin customer support. Note that before doing
any tests, the access jumper (or keyswitch if installed) must
be installed as described in section 2 of this manual, and the
access code must be entered in page 1 of setpoints. The
table below lists some of the more common reasons for
apparent malfunctions.
APPENDIX B
REFERENCE
Relay wiring diagram
Relay wiring diagram
Instruction manual installation
instructions, section 2.
Relay wiring diagram.
Actual values page 1.
Relay wiring diagram.
Instruction manual section 8.
Setpoints page 2.
Actual values page 6.
Relay wiring diagram.
Relay wiring diagram.
Setpoints page 9.
Setpoints page 9.
B-1