10.23
Date Code 20080213 Instruction Manual SEL-351A Relay
Serial Port Communications and Commands
Command Explanations
Accumulated energy metering values function like those in an
electromechanical energy meter. When the energy meter reaches 99999 MWh
or 99999 MVARh, it starts over at zero. In firmware versions released prior to
November 2002, the SEL-351A energy meter registered dollar signs (
$$) after
reaching the upper metering limit.
MET M—Maximum/Minimum Metering
The MET M command displays the maximum and minimum values of the
following quantities:
To view maximum/minimum metering values, enter the command:
=>MET M <Enter>
The output from an SEL-351A with wye-connected voltage inputs is shown:
=>MET M <Enter>
FEEDER 1 Date: 08/10/99 Time: 15:16:00.239
STATION A
Max Date Time Min Date Time
IA(A) 196.8 02/01/99 15:00:42.574 30.0 02/01/99 14:51:02.391
IB(A) 195.0 02/01/99 15:05:19.558 31.8 02/01/99 14:50:55.536
IC(A) 200.4 02/01/99 15:00:42.578 52.2 02/01/99 14:51:02.332
IN(A) 42.6 02/01/99 14:51:02.328 42.6 02/01/99 14:51:02.328
IG(A) 42.0 02/01/99 14:50:55.294 42.0 02/01/99 14:50:55.294
VA(kV) 11.7 02/01/99 15:01:01.576 3.4 02/01/99 15:00:42.545
VB(kV) 11.7 02/01/99 15:00:42.937 2.4 02/01/99 15:00:42.541
VC(kV) 11.7 02/01/99 15:00:42.578 3.1 02/01/99 15:00:42.545
VS(kV) 11.7 02/01/99 15:01:01.576 3.4 02/01/99 15:00:42.545
MW3P 6.9 02/01/99 15:00:44.095 0.4 02/01/99 15:00:42.545
MVAR3P 1.0 02/01/99 15:00:42.578 0.1 02/01/99 15:00:42.545
LAST RESET 01/27/99 15:31:41.237
=>
Reset the maximum/minimum values using the MET RM command. All
values will display
RESET until new maximum/minimum values are recorded.
For more information on maximum/minimum metering, see Maximum/
Minimum Metering on page 8.29.
MET PM—Synchrophasor Metering
The MET PM command (available when TSOK = logical 1 and EPMU = Y)
displays the synchrophasor measurements. For more information, see View
Synchrophasors by Using the MET PM Command on page L.12.
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)
a
a
VS is not available in the SEL-351A-1.
V
AB,BC,CA,S
Delta-connected voltage inputs
(kV primary)
a
Power MW
3P
Three-phase megawatts
MVAR
3P
Three-phase megavars
Reset Time Last time the maximum/minimum
meter was reset
Courtesy of NationalSwitchgear.com
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