Sel 411L - Figure 9.18 Rolling Demand Metering

P.9.34
SEL-411L Relay Protection Manual Date Code 20151029
Monitoring and Metering
Metering
Figure 9.18 Rolling Demand Metering
Demand Metering Settings
Use the demand metering enable setting EDEM to select the demand metering
type (thermal or rolling) appropriate to your needs. Use demand pickup
settings PDEMP, QDEMP, and GDEMP to set alarm thresholds to notify you
when demand currents exceed preset operational points. Table 9.20 shows the
demand metering settings.
Step
Current
Input
Rolling
Demand
Meter
Response
(EDEM := ROL)
1.0
1.0
.67
.33
0
0.5
0
DMTC Period
(a)
0
5
10
15
Time
(minutes)
0
5
10
15
Time
(minutes)
Step
Current
Input
Rolling
Demand
Meter
Response
(EDEM := ROL)
1.0
1.0
.67
.33
0
0.5
0
DMTC Period
(b)
0
5
10
15
Time
(minutes)
0
5
10
15
Time
(minutes)
Step
Current
Input
Rolling
Demand
Meter
Response
(EDEM := ROL)
1.0
1.0
.67
.33
0
0.5
0
DMTC Period
(c)
0
5
10
15
Time
(minutes)
0
5
10
15
Time
(minutes)
Step
Current
Input
Rolling
Demand
Meter
Response
(EDEM := ROL)
1.0
1.0
.67
.33
0
0.5
0
DMTC Period
0
5
10
15
Time
(minutes)
0
5
10
15
Time
(minutes)
(d)