GE Power Management
745 Transformer Management Relay
6-21
6 ACTUAL VALUES
6.7 SELF-TEST ERRORS
6
6.7 SELF-TEST ERRORS
6.7.1 DESCRIPTION
The 745 performs self-diagnostics at initialization (after power-up), and continuously thereafter (in a back-
ground task). The tests ensure that every testable unit of the hardware is functioning correctly.
ANY SELF-TEST ERROR INDICATES A SERIOUS PROBLEM REQUIRING SERVICE.
6.7.2 MAJOR SELF-TEST ERRORS
Upon detection of a major self-test error, the 745:
•
disables all protection functionality
•
turns on the front panel SELF-TEST ERROR indicator
•
turns off the front panel IN SERVICE indicator
•
de-energizes all output relays, including the SELF-TEST relay
•
indicates the failure by inserting an appropriate message in the target message queue
•
records the failure in the EVENT RECORDER
6.7.3 MINOR SELF-TEST ERRORS
Upon detection of a minor self-test error, the 745:
•
turns on the front panel SELF-TEST ERROR indicator
•
de-energizes the SELF-TEST relay
•
indicates the failure by inserting an appropriate message in the target message queue
•
records the failure in the EVENT RECORDER
All conditions listed in Table 6–3: SELF-TEST ERROR INTERPRETATION cause a target message to be gen-
erated.
CAUTION
Summary of Contents for 745 TRANSFORMER MANAGEMENT RELAY
Page 30: ...2 8 745 Transformer Management Relay GE Power Management 2 3 SECURITY 2 GETTING STARTED 2 ...
Page 210: ...7 36 745 Transformer Management Relay GE Power Management 7 2 BLOCK DIAGRAMS 7 SCHEME LOGIC 7 ...
Page 322: ...9 12 745 Transformer Management Relay GE Power Management 9 3 USING 745PC 9 745 PC SOFTWARE 9 ...
Page 396: ...A 4 745 Transformer Management Relay GE Power Management A 1 FIGURES AND TABLES APPENDIXA A ...
Page 400: ...C 2 745 Transformer Management Relay GE Power Management C 1 WARRANTY INFORMATION APPENDIXC C ...
Page 406: ...vi 745 Transformer Management Relay GE Power Management ...
Page 407: ...GE Power Management 745 Transformer Management Relay NOTES ...
