Schweitzer Engineering SEL-351P - MET K - Instantaneous Metering

10-22 Serial Port Communications and Commands Date Code 990215
SEL-351P Manual Técnico
MET k – Instantaneous Metering
The MET k command displays instantaneous magnitudes (and angles if applicable) of the
following quantities:
Currents I
A,B,C,N
Input currents (A primary)
I
G
Residual ground current (A primary; I
G
=3I
0
= I
A
+ I
B
+ I
C
)
Voltages V
A,B,C,S
Wye-connected voltage inputs (kV primary)
Power MW
A,B,C
Single-phase megawatts (wye-connected voltage inputs only)
MW
3P
Three-phase megawatts
MVAR
A,B,C
Single- and three-phase megavars (wye-connected voltage inputs
only)
MVAR
3P
Three-phase megavars
Power Factor PF
A,B,C,3P
Single- and three-phase power factor; leading or lagging
Sequence I
1
, 3I
2
, 3I
0
Positive-, negative-, and zero-sequence currents (A primary)
V
1
, V
2
Positive- and negative-sequence voltages (kV primary)
3V
0
Zero-sequence voltage (kV primary, wye-connected voltage
inputs only)
Frequency FREQ (Hz) Instantaneous power system frequency (measured on voltage
channel VA)
The angles are referenced to the A-phase voltage if it is greater than 13 V secondary; otherwise,
the angles are referenced to A-phase current. The angles range from -179.99 to 180.00 degrees.
To view instantaneous metering values, enter the command:
=>MET k <ENTER>
where k is an optional parameter to specify the number of times (1 - 32767) to repeat the meter
display. If k is not specified, the meter report is displayed once. The output from an SEL-351P
with three-phase wye-connected voltage inputs is shown: