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Chapter 8—Measurements and calculations PowerLogic™ PM5100 series user guide
Peak demand
The maximum values for the kWD, kVARD, kVAD power, and amps (or peak demand)
is maintained in the meter’s non-volatile memory. The peak for each value is the
highest average reading since the meter was last reset. The power meter also stores
the date and time when the peak demand occurred. In addition to the peak demand, the
power meter also stores the coinciding average 3-phase power factor. The average 3-
phase power factor is defined as “demand kW/demand kVA” for the peak demand
interval.
Related topics
• To reset peak demand values from the power meter display, see “Single resets” on
page 78.
Predicted demand example
1:00 1:06 1:15
15-minute interval
Predicted demand if load is
added during interval;
predicted demand increases
to reflect increased demand
Predicted demand if no load
is added.
Time
Change in Load
Demand
for last
completed
interval
Beginning
of interval
Partial Interval
Demand