Power demand

Power demand is a measure of average power consumption over a fixed time interval.

Only one demand parameter can be set at a given time. You can set it using the meter’s display, through communication using ION setup, or by using any Modbus tool that supports FC16.

The list of demand parameters that can be configured are :

VA demand
VAR demand
W demand

Last demand: This demand updates in the NVRAM of the meter at the end of a demand interval. The present value at the end of the demand interval updates to last demand.

Present demand: The demand calculated by dividing energy accumulated during a specified period by length of that period.

Peak demand: Peak Demand is the highest recorded demand value in NVRAM. It is not dependent on any interval or cycle. Unless there is no value recorded higher than the current value of the peak demand, the peak demand value will not update. The meter displays the peak demand occurrence time. The meter takes a snapshot of meter On hours at which the peak demand occurred.

NOTE: This value gets cleared or reset when demand configuration is changed to other configuration parameter or when the demand parameter is reset in the meter.

The meter measures instantaneous consumption and can calculate demand using various methods.