Schneider Electric HRB1684301-01 Timer, Peak demand Input metering demand, Operating timer

Chapter 12—Measurements and calculations PowerLogic™ PM5500 series user manual

Peak demand

Input metering demand

Predicted demand example
Beginning
of interval	15-minute interval
Demand	Partial Interval	Predicted demand if load is
for last		added during interval;
completed	Demand	predicted demand increases
interval		to reflect increased demand
		Predicted demand if no load
		is added.
		Time
1:00	1:06	1:15
		Change in Load

The maximum values for the kWD, kVARD, and kVAD power (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

•See “Demand” on page 12 for a list of available peak demand readings.

•See “Single resets” on page 86 to reset peak demand values using the meter display.

The power meter supports up to 4 input metering channels, one for each digital input. The input metering channels can be used to measure water, air, gas, electric and steam utilities (WAGES).

Typical WAGES utility meters have no communications capabilities, but they usually have a pulse output. The utility meter sends a pulse to its output each time a preset quantity or amount of (WAGES) energy is consumed or delivered. This preset quantity or amount is referred to as the pulse weight.

To monitor the utility meter, connect its pulse output to the power meter’s digital input. Use ION Setup to associate the digital input for input metering and configure the input metering operation mode, pulse weight, consumption units and demand units.

Related topics

•See “Digital input setup” on page 72 for details on configuring the digital inputs.

•See “Input metering setup” on page 75 for details on configuring input metering.

Timer

The meter supports an active load timer and an operating timer. Use the meter display to navigate to the Timer screens.

Operating timer

The operating timer (Timer > Oper) keeps track of how long the meter has been powered up.

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