Alstom MiCOM P846, Техническое руководство

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Commissioning P846/EN CM/D
MiCOM P846
(CM) 10-19
CM
Cell in MEASUREMENTS 1 column Voltage applied to
[021A: VAN Magnitude] D19 – D22
[021C: VBN Magnitude] D20 - D22
[021E: VCN Magnitude] D21 – D22
Table 9: Voltage input terminals
The measured voltage values on the relay LCD or a portable PC connected to the front
communication port will either be in primary or secondary volts. If cell [0D02: MEASURE’T
SETUP, Local Values] is set to ‘Primary’, the values displayed should be equal to the applied
voltage multiplied by the corresponding voltage transformer ratio set in the ‘VT and CT
RATIOS’ menu column (see Table 8). If cell [0D02: MEASURE’T SETUP, Local Values] is
set to ‘Secondary’, the value displayed should be equal to the applied voltage.
Note: If a PC connected to the relay via the rear communications port is
being used to display the measured voltage, the process will be
similar. However, the setting of cell [0D03: MEASURE’T SETUP,
Remote Values] will determine whether the displayed values are in
primary or secondary Volts.
The measurement accuracy of the relay is ±1%. However, an additional allowance must be
made for the accuracy of the test equipment being used.
Cell in MEASUREMENTS 1 column (02)
Corresponding CT Ratio
(in ‘CT and VT RATIO‘ column(0A) of
menu)
[021A: VAN Magnitude]
[021C: VBN Magnitude]
[021E: VCN Magnitude]
[0A01 : Main VT Primary]
[0A02 : Main VT Secondary]
Table 8: VT ratio settings