Miscellaneous functions
54
KW2M-A/X User's Manual
6.4 Demand function
You can select one of the demand calculation methods from the list below.
・
According to IEC61557-12
1. Sliding block interval demand
2. Fixed block interval demand
3. Current demand
The simple demand function calculates an estimate. The value is not guaranteed.
Caution
Definition of Demand: Demand is the max. power drawn from the power grid within a certain
interval (usually 15 or 30 minutes).
6.4.1 Block interval demand
The device calculates the demand for the interval you have set and displays it. The interval can be a
sliding block or a fixed block. The device outputs a demand alarm when the conditions you have set are
TRUE.
Sliding block
The interval can be set from 1 to 60 (min.) in 1-minute increments (the increment is
defined in “power
demand interval 2”)
. The device calculates the demand during the latest finished interval and displays
the value.
Ex.) Power demand interval: 15 min. Power demand interval 2: 1 min.
15 min. interval
Calculate demand during the 4th
to 19th minute
0
1
2
3
4
・・・
・・・
15
16
17
18
19
[min.]
Fixed block
The interval can be set from 1 to 60 (min.) The device calculates the demand during the latest finished
interval and displays the value. After one interval finishes, the next interval starts.
Calculate demand
during from minute 0 to
15
Calculate demand during
15 to 30 min.
15-min. interval
15-min. interval
0
15
30
[min.]
