ABB BIO-Tester Relion REX640 Quick Operation Manual page 12

12 B I O -T E S T E R R E X 6 4 0 Q U I C K O P E R AT I O N G U I D E
After successful testing:
• Switch off the power supply. Ensure the de-energized
state of both REX640 protection relay under testing and
the BIO-Tester.
• Remove all test connector cables and put them back inside
the BIO-Tester case.
• Connect all secondary wiring connector terminals back to
the protection relay. Ensure the correctness and tightness
of connectors.
• Switch on the auxiliary supply voltages of the protection
relay and the LHMI.
• Restore all the settings according to recommended set-
tings chart and follow the site testing and commissioning
guidlines before energizing the feeder.