ABB ACS550 Series 사용자 설명서 - 페이지 13

{카테고리_이름} ABB ACS550 Series에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. ABB ACS550 Series 14 페이지. Drive it low voltage ac drives 150...550 hp
ABB ACS550 Series에 대해서도 마찬가지입니다: 빠른 시작 매뉴얼 (2 페이지), 빠른 시작 매뉴얼 (2 페이지), 설치 보충 설명서 (16 페이지)

페이지 인쇄
ABB ACS550 Series 사용자 설명서
Q
H
n
P
In the calculation sheets, calculations are at single points for Q = 20% to 100%
of nominal pump flow Qn. Q is the actual flow. H is the total dynamic head at
flow Q. The efficiency figures are multiplied with k-factors witch take into
account operating conditions with some accuracy. These correcting factors are
defined based on experience.
Efficiency
100 %
DRIVE
95 %
80 %
Graph 2. Typical efficiencies.
This gives the following formulas for power calculations:
Frequency converter control
Pvsdi
p
kmi
Qi
Qn
kvsdi 
table
Throttling control, assuming constant motor efficiency
Qi
Pthi
p
kpi
Qi
2
4 .
ON/OFF control, assuming constant motor and pump efficiency
P
ON
OFF
_
avg
. 0
981
n
p
MOTOR
PUMP
Qi
Hsi
. 9
81
m
kmi
kvsdi
*
vsd
0
2 .
0
2 .
Hst
Hn
Hpi
. 9
81
, where
kpi
m
. 1
44
Qi
Qn
Qn
Qi
Hn
. 9
81
p
m
vsd
m
p
Flow
, where
13