9 FINAL CHECKS
1. Remove all test leads and temporary shorting leads.
2.
If you have had to disconnect any of the external wiring in order to perform the wiring verification tests,
replace all wiring, fuses and links in accordance with the relevant external connection or scheme
diagram.
3. The settings applied should be carefully checked against the required application-specific settings to
ensure that they are correct, and have not been mistakenly altered during testing.
4. Ensure that all protection elements required have been set to Enabled in the CONFIGURATION
column.
5. Ensure that the IED has been restored to service by checking that the Test Mode cell in the
COMMISSION TESTS column is set to ‘Disabled’.
6. If the IED is in a new installation or the circuit breaker has just been maintained, the circuit breaker
maintenance and current counters should be zero. These counters can be reset using the Reset All
Values cell. If the required access level is not active, the device will prompt for a password to be
entered so that the setting change can be made.
7. If the menu language has been changed to allow accurate testing it should be restored to the
customer’s preferred language.
8. If a P991/MMLG test block is installed, remove the P992/MMLB test plug and replace the cover so that
the protection is put into service.
9. Ensure that all event records, fault records, disturbance records, alarms and LEDs and
communications statistics have been reset.
Note:
Remember to restore the language setting to the customer’s preferred language on completion.
Chapter 14 - Commissioning Instructions MiCOM P747
364 P747-TM-EN-1
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