ABB ACS 800 Series Руководство пользователя - Страница 6
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Input data
System data
Pump data
The required data includes EQUIPMENT DATA, system data, pump data,
existing flow control method, motor and supply voltage data and operating
profile.
Economic data such as energy price and investment cost is required in order to
get figures for investment appraisal.
Liquid density, (kg/m 3 )
Enter the density of the liquid at the pump inlet in kilograms per cubic meter.
The density of water is 1000 kg/m 3 at 20 C.
PUMP
H
max
H
N
H
st
Graph.1. Typical pump and system curves.
Static head, H
st
The static head is the difference between the static pressure at the pump
discharge and the static pressure at the pump inlet but converted to head. It is
the net distance that the pumped fluid is lifted, but additionally the pressure
(liquid and gas) in the container has to be taken into account while determining
the static head.
Nominal volume flow, Q
Enter the maximum system flow in cubic meters per hour, which the existing
system will deliver and the pump must reach with existing control. PumpSave
will assume that exactly the same flow has to be delivered also with AC drive.
The energy saving calculation is based on flow rates that are equal to or less
than Q
.
n
The entered value is also shown in liters per second. (1 l/s = 3.6 m
Nominal head H
Enter the head in meters that must be generated by the pump to produce the
given nominal volume flow Q
system curve, H
SYSTEM
Q
N
(m)
(m 3 /h)
n
(m)
n
considering the system curve. The value must
n
2.
=H
+(Q
/Q
)
(H
si
st
i
n
pump curve, H
=H
-(Q
/Q
pi
max
i
-H
)
n
st
2 .
)
(H
-H
)
n
max
n
3
/h)
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