1 DB1 device series
1.10 Performance reduction (derating)
DB1 variable frequency drive
11/20 MN040031EN
Eaton.com
23
Example based on figure 14
•
Mains voltage: 3~ 400 V, 50 Hz
•
Star-connected circuit (400 V)
•
Rated Current: 1.9 A (400 V)
•
Max. ambient temperature 60 °C
￫
variable frequency drive to be selected: DB1-342D2FN-N2CC
•
DB1-
34
…: three-phase mains connection, rated voltage: 400 V
•
DB1-…
2D2
…: 2.2 A – The variable frequency drive’s rated current
(output current) guarantees that the motor will be supplied with the
required rated current (1.9 A).
1.10 Performance reduction (derating)
A power reduction on the DB1 variable frequency drive or limitation of the
maximum permanent output current (I
2
) is generally required if the installa-
tion altitude is greater than 1000 m during operation.
Derating for the set-up altitude
Permissible set-up altitude
Reduction by
without
Derating
with
Derating
1,000 m
up to 2,000 m
1 % per 100 m above 1,000 m