P341/EN O/B11 Operation Guide
CHAPTER 3 Commissioning and
Page 6/80 Maintenance
MiCOM P341
Removing the secondary front cover allows access to all keys so that settings can be
changed, LEDs and alarms reset, and fault and event records cleared. However,
menu cells that have access levels higher than the default level will require the
appropriate password to be entered before changes can be made.
Alternatively, if a portable PC is available together with suitable setting software (such
as MiCOM S1), the menu can be viewed a page at a time to display a full column of
data and text. This PC software also allows settings to be entered more easily, saved
to a file on disk for future reference or printed to produce a setting record. Refer to
the PC software user manual for details. If the software is being used for the first
time, allow sufficient time to become familiar with its operation.
3. EQUIPMENT REQUIRED FOR COMMISSIONING
3.1 Minimum equipment required
Overcurrent test set with interval timer
110V ac voltage supply (if stage 1 of the overcurrent function is set directional)
Multimeter with suitable ac current range, and ac and dc voltage ranges of
0 – 440V and 0 – 250V respectively
Continuity tester (if not included in multimeter)
Phase angle meter
Phase rotation meter
100ý precision wirewound or metal film resistor, 0.1% tolerance (0ºC±2ºC)
Note: Modern test equipment may contain many of the above features in one unit.
3.2 Optional equipment
Multi-finger test plug type MMLB01 (if test block type MMLG installed)
An electronic or brushless insulation tester with a dc output not exceeding 500V (For
insulation resistance testing when required).
A portable PC, with appropriate software (This enables the rear communications port
to be tested if this is to be used and will also save considerable time during
commissioning).
KITZ K-Bus to RS232 protocol convertor (if RS485 K-Bus port is being tested and one
is not already installed).
RS485 to RS232 convertor (if RS485 Modbus port is being tested).
A printer (for printing a setting record from the portable PC).
4. PRODUCT CHECKS
These product checks cover all aspects of the relay which should be checked to
ensure that it has not been physically damaged prior to commissioning, is functioning
correctly and all input quantity measurements are within the stated tolerances.
If the application-specific settings have been applied to the relay prior to
commissioning, it is advisable to make a copy of the settings so as to allow their
restoration later. If programmable scheme logic other than the default settings with
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