ABB ACH550 series Manual do utilizador - Página 7

Procurar online ou descarregar pdf Manual do utilizador para Controlador ABB ACH550 series. ABB ACH550 series 14 páginas. Pumpsave 4.1, energy savings calculator for pump drives
Também para ABB ACH550 series: Manual de instalação, operação e manutenção (18 páginas), Manual de início rápido (6 páginas)

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be determined from the pump curve and system curve intersection. One

assumption which PumpSave makes is that the system curve with existing

control and AC Drive control are the same. In reality this is seldom the case.

In DrivePump SW the two are separate values.

Maximum head H

Enter the discharge head pressure that will be developed by the pump at

full speed and zero flow. The value must be determined from the pump

curve. If the pump curves look complicated select a H

Efficiency, 

Enter the efficiency of the pump at volume flow Q

should be given with the impeller which will be used.

Existing control method

Existing Control Method

Pick the existing control method that you want to compare with ABB AC

Drive control. The control method is selected from the drop-down list on the

upper left part of the sheet. The options are throttling, on/off control, and

hydraulic control.

The smaller energy usage of frequency converter is compared to a large energy

required by:

• Throttling which means the liquid flow control is made by throttling valve

and motor and pump is running at full speed and pressure.

• ON/OFF which means ON/OFF duty is adjusted according to flow

requirements and a reservoir is available. The control can't be as good as with

speed control. When pump and motor is running they run at full speed.

• Hydraulic which is based on hydraulic drive or some other type of slipping

drive such as an eddy current magnetic coupling drive. The motor is running

with full speed but with slip the pump shaft is controlled.

Motor Data

PumpSave is computing from pump data the required motor output power

including 10% thermal margin. Based on this number you may enter the Motor

power.

Motor power (kW)

Enter the nameplate power rating of the motor. This is used to select the proper

drive rating. The program uses calculated power demand to determine energy

savings.

Supply voltage (V)

Enter the supply voltage used in application. The value should be between 115

(1-ph) to 690 V (3-ph). This is used to screen out some drive types.

Motor efficiency, 

Enter the motor efficiency from the motor nameplate or from other data

supplied by the motor manufacturer. Use the efficiency for full load operation

on fixed frequency utility power. The program will adjust the efficiency for

operation at reduced speeds and loads. If the motor is oversized for the

application, enter the efficiency for operation at the maximum applied load.

(m)

max

define a nice second order curve in the range 20....100% Q

(%)

which together with

max

. The efficiency value