Measurements; Measured Currents; Sequence Voltages And Currents - GE MiCOM P40 Agile Technical Manual

P44x/EN MR/Hb6
(MR) 7-14
2

MEASUREMENTS

The relay produces a variety of both directly measured and calculated system quantities.
These measurement values are updated on a per second basis and can be viewed in the
"Measurements" columns (up to three) of the relay or via MiCOM S1 Agile Measurement
viewer.
The MiCOM P442 and P444 relays are able to measure and display the following quantities
as summarized.
2.1

Measured currents

The MiCOM P442 and P444 relays produce current values. They are produced directly from
the DFT (Discrete Fourier Transform) used by the relay protection functions and present
both magnitude and phase angle measurement.
2.2

Sequence voltages and currents

Sequence quantities are produced by P442 and P444 relays from the measured Fourier
values; these are displayed as magnitude and phase angle values.
2.3 Settings
The settings under the heading "Measurement setup" can be used to configure the relay
measurement function: see "Settings" section P44x/EN ST for more information.
2.4 Measurement display quantities
There are three "Measurement" columns available in the relay for viewing of measurement
quantities. These can also be viewed with MiCOM S1 Agile (see MiCOM Px40 – Monitoring
section of the MiCOM S1 Agile User Manual) and are shown below:
P442 P444
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MEASUREMENTS 1
IA Magnitude
IA phase Angle
IB Magnitude
IB Phase Angle
IV Magnitude
IC Phase Angle
IN Magnitude
IN Angle
I1 Magnitude
I2 Magnitude
I0 magnitude
VAB Magnitude
VAB Phase Angle
VBC Magnitude
VBC Phase Angle
VCA Magnitude
VCA Phase Angle
VAN Magnitude
VAN Phase Angle
VBN Magnitude
VBN Phase Angle
VCN Magnitude
Measurements and Recording
MiCOM P442 & P444