ABB ACS550 Series Podręcznik użytkownika - Strona 8

Przeglądaj online lub pobierz pdf Podręcznik użytkownika dla Kontroler ABB ACS550 Series. ABB ACS550 Series 14 stron. Drive it low voltage ac drives 150...550 hp
Również dla ABB ACS550 Series: Skrócona instrukcja obsługi (2 strony), Skrócona instrukcja obsługi (2 strony), Dodatkowa instrukcja instalacji (16 strony)

Operating profile

Economic Data

Results

Annual running time

In other words, this is the total operating time per year (h). Enter the estimated

number of hours that the pump is expected to run during a year's time. For 24

hour, 365-day operation, enter 8760 hours.

Operating Time at Different Flow Rates (%)

Enter the estimated time as a percentage of the total operating time for

operation at each of the listed flow rates from 100% to 20% of nominal volume

flow. Leave blank or enter zero for flow rates that are not used. The sum of the

entered percentages should be 100%. A figure under the white cells shows if

the sum equals 100. If it does not, a comment

100!" shows.

Currency

Specify here the currency to be used in calculations. The default unit is the

Euro (EUR).

Energy price (per kWh)

Enter the price of energy per kilowatt-hour (kWh). The PumpSave program

does not have provisions for calculating demand charges. To estimate energy

cost including demand charges, enter the average cost of energy per kWh

including average demand charges.

Investment cost

Enter the estimated additional cost of purchasing and installing a variable

speed AC drive as compared to the alternative method of flow control used in

the comparison. Use the same currency units as entered for energy cost. This

entry will be used to calculate the direct payback time.

Interest rate (%)

This is the compensation for capital in the net present value calculation.

Service Life (years)

The expected service life of the drive. Also this is required for the net present

value calculation.

The results of the calculations include the estimated annual energy

consumption for the existing control method and for AC drive control, the

difference of these two, which equals the annual energy saving achieved by

using a variable speed AC drive. PumpSave also estimates the reduction in

carbon dioxide (CO

) emissions due to the reduced electricity consumption.

is the most important of the greenhouse gases, which cause a global

environmental problem called the climate change.

Payback period is calculated for the investment in the drive as compared to the

alternative method of flow control. Net present value is also calculated

provided that the user enters an interest rate and service life.

"THIS SUM MUST EQUAL