Technical information

Cost Savings =
{
∑
t =0
t
(
Rated Motor Power ∗ Power Reference Factor
)
− Actual Power Consumption × Energy Cost
}
− Investment Cost
Break even (payback) occurs when the value read in the parameter turns from negative to positive.
It is not possible to reset the Energy Savings counter, but the counter can be stopped any time by setting 23-80 Power
Reference Factor to 0.
Parameter overview:
Parameter for settings Parameters for readout
Rated Motor Power
1-20 Motor Power [kW]
Energy Savings
23-83 Energy Savings
Power Reference Factor in %
23-80 Power Reference Factor
Actual Power
16-10 Power [kW], 16-11 Power
[hp]
Energy Cost per kWh
23-81 Energy Cost
Cost Savings
23-84 Cost Savings
Investment
23-82 Investment
23-80 Power Reference Factor
Range: Function:
100 %* [0 - 100
%]
Set the percentage of the rated motor size
(set in 1-20 Motor Power [kW] or 1-21 Motor
Power [HP]) which is supposed to represent
the average power yielded at the time
running with fixed speed (before upgrade
with variable speed control).
Must be set to a value different from zero to
start counting.
23-81 Energy Cost
Range: Function:
1.00 * [0.00 -
999999.99 ]
Set the actual cost for a kWh in local
currency. If the energy cost is changed
later on it will impact the calculation
for the entire period.
23-82 Investment
Range: Function:
0 * [0 - 999999999 ] Set the value of the investment spent on
upgrading the plant with speed control,
in same currency as used in 23-81 Energy
Cost.
23-83 Energy Savings
Range: Function:
0 kWh* [0 - 0
kWh]
This parameter allows a readout of the
accumulated difference between the
reference power and the actual output
power.
If motor size set in hp (1-21 Motor Power
[HP]), the equivalent kW value will be used
for the Energy Savings.
23-84 Cost Savings
Range: Function:
0 * [0 - 2147483647 ] This parameter allows a readout of the
calculation based on the above equation
(in local currency).
Parameter Description
VLT
®
HVAC Drive Programming Guide
168 MG11CD02 - VLT
®
is a registered Danfoss trademark
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