Schweitzer Engineering Laboratories SEL-311C - Page 384

10.22
SEL-311C Relay Instruction Manual Date Code 20060320
Serial Port Communications and Commands
Command Explanations
MET D—Demand Metering
The MET D command displays the demand and peak demand values of the
following quantities:
To view demand metering values, enter the command:
=>MET D <Enter>
The output from an SEL-311C is shown:
=>MET D <Enter>
SEL-311C POTT Date: 10/12/99 Time: 16:22:04.372
EXAMPLE: BUS B, BREAKER 3
IA IB IC IG 3I2
DEMAND 188.6 186.6 191.8 4.5 4.7
PEAK 188.6 186.6 191.8 4.5 4.7
MWA MWB MWC MW3P MVARA MVARB MVARC MVAR3P
DEMAND IN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
PEAK IN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
DEMAND OUT 2.2 2.2 2.2 6.6 0.3 0.3 0.3 0.9
PEAK OUT 3.1 3.1 3.1 9.3 0.4 0.4 0.4 1.2
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 metering, see Demand Metering on page 8.20.
MET E—Energy Metering
The MET E command displays the following quantities:
To view energy metering values, enter the command:
=>MET E <Enter>
Currents I
A,B,C
I
G
3I
2
Input currents (A primary)
Residual ground current (A primary;
I
G
= 3I
0
= I
A
+ I
B
+ I
C
)
Negative-sequence current (A primary)
Power MW
A,B,C
MW
3P
MVAR
A,B,C
MVAR
3P
Single-phase megawatts
Three-phase megawatts
Single-phase megavars
Three-phase megavars
Reset Time Demand, Peak Last time the demands and peak
demands were reset
Energy MWh
A,B,C
MWh
3P
MVARh
A,B,C
MVARh
3P
Single-phase megawatt hours (in and out)
Three-phase megawatt hours (in and out)
Single-phase megavar hours (in and out)
Three-phase megavar hours (in and out)
Reset Time Last time the energy meter was reset