Sel 551 - Page 133

5.15
Date Code 20110408 Instruction Manual SEL-551 Relay
Serial Port Communications and Commands
Command Explanations
The SEL-551 reports the phase angles referenced to IA (IA phase angle = 0,
positive phase angles leading).
To view instantaneous metering values, enter the command:
=>MET n <Enter>
where n is an optional parameter to specify the number of times to repeat the
meter display. The value for n may range from 1 to 32767. If n is not specified,
the relay displays the meter report once:
FEEDER 1 Date: 03/05/96 Time: 10:29:42.609
STATION A
IA IB IC IN IG 3I2
A, pri 477 455 492 0 31 35
Degrees 0.00 239.95 120.28 110.18 88.24 275.83
=>
MET D Command (Demand Ammeter)
The MET D command displays the demand and peak demand values of the
following quantities:
To view demand ammetering values, enter the command:
=>MET D <Enter>
=>MET D <Enter>
FEEDER 1 Date: 02/01/97 Time: 15:08:05.615
STATION A
IA IB IC IN IG 3I2
DEMAND 188.6 186.6 191.8 0.2 4.5 4.7
PEAK 188.6 186.6 191.8 0.3 4.5 4.7
LAST DEMAND RESET 01/27/97 15:31:51.238 LAST PEAK RESET 01/27/97 15:31:56.239
=>
Reset the accumulated demand values using the MET RD command. Reset
the peak demand values using the MET RP command. For more information
on demand ammetering, see Demand Ammetering on page 3.41.
QUI Command (Quit)
The QUI command returns the relay to Access Level 0.
To return to Access Level 0, enter the command:
=>QUI <Enter>
Currents I
A,B,C,N
Input currents (A primary)
I
G
Residual ground current (A primary;
IG = 3I0 = IA + IB + IC)
3I
2
Negative-sequence current (A primary)
Reset Time Demand, Peak Last time the demands and peak demands were reset