Schweitzer Engineering Laboratories SEL-351-5, Instruction Manual

Page: 457 / 706

10.21
Date Code 20070117
Instruction Manual SEL-351-5, -6, -7 Relay
Serial Port Communications and Commands
Command Explanations
=> MET <Enter>
FEEDER 1 Date: 02/01/01 Time: 15:00:52.615
STATION A
A B C N G
I MAG (A) 195.146 192.614 198.090 0.302 4.880
I ANG (DEG) -8.03 -128.02 111.89 52.98 81.22
A B C S
V MAG (KV) 11.691 11.686 11.669 11.695
V ANG (DEG) 0.00 -119.79 120.15 0.05
A B C 3P
MW 2.259 2.228 2.288 6.774
MVAR 0.319 0.322 0.332 0.973
PF 0.990 0.990 0.990 0.990
LAG LAG LAG LAG
I1 3I2 3I0 V1 V2 3V0
MAG 195.283 4.630 4.880 11.682 0.007 0.056
ANG (DEG) -8.06 -103.93 81.22 0.12 -80.25 -65.83
FREQ (Hz) 60.00 VDC (V) 129.5
=>
MET X k—Extended Instantaneous Metering
The MET X k command displays the same data as the MET k command with
the addition of calculated phase-to-phase voltage quantities V
AB
, V
BC
, V
CA
,
and the Vbase quantity used by the Voltage Sag/Swell/Interruption Recorder.
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
Phase-to-neutral voltage inputs
(kV primary) (wye-connected)
V
AB,BC,CA,S
Phase-to-phase voltages
(kV primary) (delta-connected)
V
AB,BC,CA
Calculated phase-to-phase voltages
(kV primary) (wye-connected)
Vbase Demand average value based on V1,
subject to the operating logic of the
SSI Elements (see
Section 3:
Overcurrent, Voltage, Synchronism
Check, Frequency, and Power
Elements
) when setting ESSI = Y in
the active setting group. Vbase only
registers a value after valid three-
phase voltage signals have been
present since the last Vbase
initializing. The Vbase quantity is
used in SEL-351-7 relay model.
Vbase is always shown as 0.00 kV in
SEL-351-5, -6 relay models.
Power MW
A,B,C
Single-phase megawatts (wye-
connected voltage inputs only)
MW
3P
Three-phase megawatts
MVAR
A,B,C
Single-phase megavars (wye-
connected voltage inputs only)
MVAR
3P
Three-phase megavars
Power Factor PF
A,B,C
Single-phase power factor; leading or
lagging (wye-connected
voltage inputs only)