KYORITSU 6315 Instruction Manual - Manual (Page 64)

KEW6315 Outline of demand measurement concept
KEW6315 - 62 -
Outline of demand measurement concept
In such a contract the electricity tariff rates (i.e. for kWhr units) are based upon the consumer’s maximum
power demand. The maximum demand is the maximum of average powers recorded over a 30min interval.
Assuming the max target demand to be 500kW, the average power during Measurement cycle 1 is fine, but
the power consumption for the first 15 min of Measurement cycle 2 is 600kW. In such a case, the average
power during Measurement cycle can be maintained at 500kW (same as Measurement cycle 1) by reducing
the power of the last 15 min to 400kW. If the power consumption during the first half of cycle 2 is 1000kW
and the last 15min is 0kW, the average power is the same: 500kW. While “Inspection cycle” is set to “15 min”,
the buzzer sounds after 15 min at the start of Measurement cycle 2.
(kW)
600
600kW
500
500kW 500kW
400kW
0 15 30 15
(Buzzer)
30
(min)
Inspection
cycle
Meas. cycle 2 Meas. cycle 1
Inspection
cycle
Inspection
cycle
Inspection
cycle