ABB RELION REX640 Installation Manual page 86

Section 6
Checking installation
78
1. Energize the power supply of the protection relay and the optional LHMI. This
can be done in a number of ways, from energizing a whole cubicle to energizing
a single protection relay.
The following sequence is expected when the protection relay is energized:
• The green Ready LED starts flashing instantly on the power supply
module of the protection relay.
• Within 90 seconds both the green Ready LED of the power supply module
and the Home button on the LHMI show a steady light which indicates a
successful start-up.
The start-up time depends on the size of the application
configuration. Application configurations with less
functionality have shorter start-up times.
2. Check the self-supervision function via the HMI path Monitoring/IED status
to verify that the protection relay operates properly.
If the green Ready LED of the power supply module and the
Home button on the LHMI continue to flash after the start-up,
the protection relay has detected an internal error. Navigate to
Monitoring/IED status to investigate the error description.
1MRS759115 A
REX640
Installation Manual