Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 170

Parameter Description
23-65 Minimum Bin Value
Range:
Size [ 0 -
related 100
*
%]
3 3
23-66 Reset Continuous Bin Data
Option:
[0] Do not
*
reset
3.19.5 23-8* Payback Counter
The frequency converter includes a feature which can give a rough calculation on payback in cases where the frequency
converter has been installed in an existing plant to ensure energy savings. Reference for the savings is a set value to
represent the average power yielded before the upgrade with variable speed control.
P
Illustration 3.63 Variable Speed Control
The difference between the reference power at fixed speed and the actual power yielded with speed control represent the
actual saving.
As value for the fixed speed case, the rated motor size (kW) is multiplied with a factor (set in %) representing the power
produced at fixed speed. The difference between this reference power and the actual power is accumulated and stored. The
difference in energy can be read in parameter 23-83 Energy Savings.
The accumulated value for the difference in power consumption is multiplied with the energy cost in local currency and the
investment is subtracted. This calculation for cost savings can also be read in parameter 23-84 Cost Savings.
Cost Savings =
t
∑ Rated Motor Power ∗ Power Reference Factor
t = 0
− Actual Power Consumption × Energy Cost
− Investment Cost
Breakeven (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
parameter 23-80 Power Reference Factor to 0.
168
VLT
Function:
Array with 10 elements ([0]–[9] below
parameter number in display). Press [OK] and
▲
step between elements with [ ] and [
Set the minimum limit for each interval in
parameter 23-61 Continuous Bin Data and
parameter 23-62 Timed Bin Data. Example: If
selecting [1] counter and changing setting from
10% to 12%, [0] counter is based on the
interval 0 to <12% and [1] counter on interval
12 to <20%.
Function:
Select [1] Do reset to reset all values in
parameter 23-61 Continuous Bin Data. After
pressing [OK], the setting of the parameter
value automatically changes to [0] Do not reset.
Rated power for the
motor size used
(P 1-20/21)
Reference power
(at xed speed)
(P 23-80)
Actual power yielded
with variable
speed control
(read P 16-10/11)
Danfoss A/S © 05/2016 All rights reserved.
®
Refrigeration Drive FC 103
23-66 Reset Continuous Bin Data
Option:
[1] Do reset
23-67 Reset Timed Bin Data
▼
].
Option:
[0] Do not
*
reset
[1] Do reset
Function:
Function:
Select [1] Do reset to reset all counters in
parameter 23-62 Timed Bin Data.
After pressing [OK], the setting of the
parameter value automatically changes to [0]
Do not reset.
MG16H202