1 Device series DC1-S…
1.8 Output reduction (derating)
DC1-S…20…, DC1-S…OE1 Variable Frequency Drives
05/21 MN040058EN
www.eaton.com
21
1.8 Output reduction (derating)
Derating the DC1-S… variable frequency drive / limiting the maximum
continuous output current (I
2
) will generally be necessary if, during operation:
•
The ambient air temperature is higher than 40 °C
•
An installation altitude of 1.000 m is exceeded
•
The effective switching frequency is higher than the minimum value
The following tables specify the factors that need to be applied when
selecting a DC1-S… variable frequency drive if the drive will be run outside
these conditions:
Derating for ambient temperature
Derating for installation altitude
Derating for switching frequency
Enclosure degree
of protection
Maximum permissible ambient air temperature
Derate
without derating
with derating
IP20
50 °C
50 °C
none
IP66
40 °C
50 °C
2.5 % per K
Enclosure degree
of protection
Permissible altitude
Derate
without derating
with derating
IP20, IP66
1000 m
2000 m – with UL Certification
4000 m maximum – without UL
Certification
1 % per 100 m
Enclosure degree
of protection
Switching frequency (P-17), setting (audible)
1)
4 kHz
8 kHz
12 kHz
16 kHz
24 kHz
32 kHz
IP20
none
none
20 %
30 %
40 %
50 %
IP66
none
10 %
25 %
35 %
50 %
50 %
1) The switching frequency’s effective rms value will be approximately half the value set with parameter P-17
(double modulation).
Summary of Contents for DC1-S1011NB-A20CE1 1
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