P54x/EN MT/La4 Maintenance
(MT) 11-6
MiCOM P543, P544, P545 & P546
Note:
Only use a type ½AA Lithium battery with a nominal voltage of 3.6V
and safety approvals such as UL (Underwriters Laboratory), CSA
(Canadian Standards Association) or VDE (Vereinigung Deutscher
Elektrizitätswerke).
Ensure that the battery is securely held in its socket and that the battery terminals are
making good contact with the metal terminals of the socket.
Close the bottom access cover.
1.5.2 Post modification tests
To ensure that the replacement battery will maintai
n the time and status data if the auxiliary
supply fails, check cell [0806: DATE and TIME, Battery Status] reads ‘Healthy’.
Additionally, if further confirmation that the replacement battery is installed correctly is
required, the commissioning test described in section 5.2.3 of the Commissioning chapter
(P54x/EN CM), ‘Date and Time’, can be performed.
1.5.3 Battery disposal
The battery that has be
en removed should be disposed of in accordance with the disposal
procedure for Lithium batteries in the country in which the relay is installed.
1.6 Cleaning
Before cl
eaning the equipment ensure that all ac and dc supplies, current transformer and
voltage transformer connections are isolated to prevent any chance of an electric shock
whilst cleaning.
The equipment may be cleaned using a lint-free cloth moistened with clean water. The use
of detergents, solvents or abrasive cleaners is not recommended as they may damage the
relay’s surface and leave a conductive residue.
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