Commissioning P54x/EN CM/La4
MiCOM P543, P544, P545 & P546
CM) 10-65
CM
12. FINAL CHECKS
The tests are now complete.
Remove all test or temporary shorting leads, etc. If it has been necessary to
disconnect any of the external wiring from the relay in order to perform the wiring
verification tests, it should be ensured that all connections (wiring, fuses and links)
are replaced in accordance with the relevant external connection or scheme diagram.
Ensure that the relay has been restored to service by checking that cell
[0F0D: COMMISSION TESTS, Test Mode] and [0F12: COMMISSION TESTS, Static Test]
are set to ‘Disabled’.
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.
There are two methods of checking the settings:
Extract the settings from the relay using a portable PC running the appropriate software
via the front EIA(RS)232 port, located under the bottom access cover, or rear
communications port (with a KITZ protocol converter connected). Compare the settings
transferred from the relay with the original written application-specific setting record.
(For cases where the customer has only provided a printed copy of the required settings
but a portable PC is available).
Step through the settings using the relay’s operator interface and compare them with the
original application-specific setting record. Ensure that all protection elements required
have been ENABLED in the CONFIGURATION column.
If the relay 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 cell [0609: CB CONDITION, Reset All Values]. If the required access level is not
active, the relay will prompt for a password to be entered so that the setting change can be
made.
If the menu language has been changed to allow accurate testing it should be restored to the
customer’s preferred language.
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.
Ensure that all event records, fault records, disturbance records, alarms and LEDs and
communications statistics have been reset before leaving the relay.
If applicable, replace the secondary front cover on the relay.
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