Danfoss VLT Programming Manual page 162

Parameter Description
Cost Savings =
{
t
(
Rated Motor Power ∗ Power Reference Factor
∑
t =0
Actual Power Consumption
−
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
Rated Motor Power
Power Reference Factor in %
Energy Cost per kWh
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 - Set the actual cost for a kWh in local
*
999999.99 ] 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 This parameter allows a readout of the
*
kWh] 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.
®
VLT HVAC Drive Programming Guide
)
}
Energy Cost
×
1-20 Motor Power [kW]
23-80 Power Reference Factor
23-81 Energy Cost
23-82 Investment
®
MG.11.CB.02 - VLT is a registered Danfoss trademark
Parameters for readout
Energy Savings
Actual Power
Cost 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).
23-83 Energy Savings
16-10 Power [kW], 16-11 Power [hp]
23-84 Cost Savings
161
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