GE P444 User Manual

P
44x/EN MR/Hb6
Measurements and Recording
(MR) 7
-14
MiCOM P442 & P444
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 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

GE P444 Specifications

General

Brand	GE
Model	P444
Category	Protection Device
Language	English