WEG CFW900 - Derating Factor According to the Altitude of the Installation Site

English
TECHNICALSPECIFICATIONS
Frames A ... C
1,5
100%
100%
100%
2 10 0% 100% 100%
3 10 0% 100% 93%
4 10 0% 100% 87%
6 88% 83% 75%
8 75% 66% 64%
10 6 8% 62% -
12 6 0% 58% -
14 5 3% 51% -
16 4 5% 44% -
0%
20%
40%
60%
80%
100%
1,5 2 3 4 6 8 10 12 14 16
Io,nom (%)
fsw (kHz)
Frames A...C
Frame D
Frame E
fsw (kH z)
Frame D Frame E
Figure8.3:Currentderatingasafunctionoftheswitchingfrequencyintheinverterfactorysettingscondition
InsomemodelsoftheCFW900line,itisnotpossibletofollowthederatingcurveshownin
Figure8.3.Inthese
cases,thevaluesof
Table8.9.
Ifitisnotpossibletooperatewithaswitchingfrequencylowerthantheratedoneduringoverloads,thethermal
managementfunctionmustbedisabled,andinthesecases,onlyfortheindicatedmodels,thederatingvalueswill
betheonesshownin
Table8.9.
Table8.9:Currentderatingasafunctionoftheswitchingfrequency
fsw,nom
[kHz]
Thermal
management
CFW900B45P0T2 CFW900B26P0T4
CFW900C80P0T2 CFW900C50P0T4
CFW900D0150T2 CFW900D0146T4 CFW900E0203T4 CFW900E0242T4
1ID
(1)
NAL
(2)
NAL
(2)
NAL
(2)
100%
1,5ID
(1)
100%100%100%100%
Enabled100%100%100%100%
2
Disabled100%100%100%94%
Enabled100%100%100%87%
3
Disabled98%97%98%87%
Enabled100%100%100%80%
4
Disabled96%94%97%80%
6ID
(1)
84%84%83%65%
8ID
(1)
72%75%70%50%
10ID
(1)
65%67%63%NAL
(2)
12ID
(1)
58%60%57%NAL
(2)
14ID
(1)
50%53%50%NAL
(2)
16ID
(1)
43%46%43%NAL
(2)
(1)
Indifferent.
(2)
Notallowed.
8.2.4DeratingfactoraccordingtotheAltitudeoftheInstallationSite
Themaximumoperatingaltitudeis1000metersunderratedconditions.
From1000mto4000m:deratethecurrentby1%foreachincrementof100m(thisistheFDalfactor).
From2000mto4000m:inadditiontoapplyingthecurrentderatingfactorasmentionedabove,itisnecessaryto
reducethemaximumrmssupplyvoltageoftheinverter(240Vfor220...240Vmodelsand480Vfor380...480V
models)by1.1%foreach100mabove2000m.
Figure8.4graphicallyillustratestheoutputcurrentandsupplyvoltagederatingspecificationsaccordingtothe
altitude.
104|CFW900