GE 745 Instruction Manual page 298

PLACING THE RELAY INTO SERVICE
7.7 Placing the Relay into Service
7.7.1 Precautions
7.7.2 Procedure
7–60
The procedure outlined in this section is explicitly concerned with the 745 relay and does
not include the operation/commissioning or placing into service of any equipment external
to the 745. Users should have already performed such tests as phasing of CTs, ratio
measurement, verification of saturation curve, insulation test, continuity and resistance
measurements.
 Restore all settings and logic to the desired in-service values.
 Verify against the check list prepared while testing the relay.
 Upload all the 745 setpoints to a computer file and print for a final
inspection to confirm that all setpoints are correct.
 Set the 745 clock (date and time).
 Clear all historical values stored in the relay by entering "Yes" at
EVENT RECORDER
RECORDER.
 Remove all test connections, supplies, monitoring equipment from the
relay terminals and relay panels except for equipment to be used to
monitor first transformer energization.
 Restore all panel wiring to normal except for those changes made
intentionally for the first energization (blocking of some tripping
functions for example).
 Perform a complete visual inspection to confirm that the 745 is ready to
be placed into service.
 Ensure that the relay is properly inserted in its case.
 Energize the relay power supply and verify that the Relay In Service
LED is ON, and that the Self-Test Error LED is OFF, establishing that
the relay is operating normally.
CHAPTER 7: COMMISSIONING
EVENT DATA CLEAR
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745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
A3
CLEAR EVENT
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