Schweitzer Engineering SEL-351P, Quick Start Manual

Page: 395 / 674

Date Code 990215 Breaker/Recloser Monitor, Battery System Monitor, 8-25
Metering, and Load Profile Functions
SEL-351P Manual Técnico
Time = 10 Minutes
The three 5-minute intervals in the sliding time-window at “Time = 10 minutes” each integrate
into the following 5-minute totals:
5-Minute Totals
Corresponding
5-Minute Interval
0.0 per unit -5 to 0 minutes
1.0 per unit 0 to 5 minutes
1.0 per unit 5 to 10 minutes
2.0 per unit
Rolling demand meter response at “Time = 10 minutes” = 2.0/3 = 0.67 per unit
Time = 15 Minutes
The three 5-minute intervals in the sliding time-window at “Time = 15 minutes” each integrate
into the following 5-minute totals:
5-Minute Totals
Corresponding
5-Minute Interval
1.0 per unit 0 to 5 minutes
1.0 per unit 5 to 10 minutes
1.0 per unit 10 to 15 minutes
3.0 per unit
Rolling demand meter response at “Time = 15 minutes” = 3.0/3 = 1.0 per unit
Demand Meter Settings
Table SECTION 8: .5: Demand Meter Settings and Settings Range
Setting Definition Range
EDEM Demand meter type THM = thermal
ROL = rolling
DMTC Demand meter time constant 5, 10, 15, 30, or 60 minutes
PDEMP Phase demand current pickup OFF
NDEMP* Neutral ground demand current pickup 0.20 - 6.40 A (1 A nominal)
GDEMP Residual ground demand current pickup in 0.01 A steps
QDEMP Negative-sequence demand current pickup
*0.005 - 0.20A (0.05 A nominal channel IN current input)
Note : Changing setting EDEM or DMTC resets the demand meter values to zero. This also
applies to changing the active setting group, and setting EDEM or DMTC is different in