PowerLogic™ PM5500 / PM5600 / PM5700 series – User manual PDF
HRB1684301-18

Block interval demand

For block interval demand method types, you specify a period interval (or block) that the meter uses for the demand calculation.

Select/configure how the meter handles that interval from one of these different methods:

Type Description
Timed Sliding Block Select an interval from 1 to 60 minutes (in 1-minute increments). If the interval is between 1 and 15 minutes, the demand calculation updates every 15 seconds. If the interval is between 16 and 60 minutes, the demand calculation updates every 60 seconds. The meter displays the demand value for the last completed interval.
Timed Block Select an interval from 1 to 60 minutes (in 1-minute increments). The meter calculates and updates the demand at the end of each interval.
Timed Rolling Block Select an interval and a subinterval. The subinterval must divide evenly into the interval (for example, three 5-minute subintervals for a 15-minute interval). Demand is updated at the end of each subinterval. The meter displays the demand value for the last completed interval.

Block interval demand example

The following illustration shows the different ways power demand is calculated using the block interval method. In this example, the interval is set to 15 minutes.

Timed sliding block

The image illustrates how demand calculations are updated every 15 seconds using a sliding window approach. It features a timeline marked in seconds (15, 30, 45, 60, etc.) with overlapping blocks representing consecutive 15-minute intervals. Each block shifts forward in time every 15 seconds, and the demand value is calculated as the average for the most recently completed interval.

Timed block

The image illustrates a timeline segmented into consecutive 15-minute intervals, beginning at 15 minutes and extending beyond 45 minutes. Each interval is labeled "15-minute interval," with a highlighted blue section representing the second interval (30 to 45 minutes). An arrow indicates that calculations update at the end of each interval, and another arrow points to the demand value, which is defined as the average for the last completed interval. The x-axis is labeled "Time (min)."

Timed rolling block

The image illustrates how demand values are calculated using overlapping 15-minute intervals that update every 5 minutes. The x-axis represents time in minutes, ranging from 15 to 45. Three rolling blocks are shown: the first spans from 20 to 35 minutes, the second from 25 to 40 minutes, and the third from 30 to 45 minutes. Each block shifts forward in 5-minute increments, with calculations updating at the end of each subinterval. The demand value is defined as the average for the last completed 15-minute interval.

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