ACS 300 User’s Manual 11
Chapter 2 - Mechanical Installation
Cooling
Cooling of the ACS 300 is based on natural air circulation or by
fan, depending on the type.
The maximum allowable ambient operating temperature is 50°C
when the load current is lower than or equal to the continuous
maximum load current I
N
and switching frequency is lower than
or equal to 8 kHz (3 kHz for model ACS 3_1-016-3). See figure
2-1 below for power derating curves.
The cooling air must be clean and free from corrosive materials.
If the cooling air contains dust, clean the cooling surfaces of the
unit regularly using compressed air and a brush.
ACS 300 frequency converters are to be used in a heated,
indoor, controlled environment that is free of moisture and
conductive contaminates such as condensation, carbon dust and
the like.
Figure 2-1 Power derating curves by switching frequency.
1P6-3 - 012-3
016-3
162 4 6 8 10 12 14
0
0.2
0.4
0.6
0.8
1.0
P
OUT
/P
N
f [kHz]
ACS 3_1-1P6-3 to 016-3
(400 V series)
ACS 3_1-1P1-1 to 4P1-1
16
2
468
10
12
14
0
0.2
0.4
0.6
0.8
1.0
P
OUT
/P
N
f [kHz]
1P1-1, 2P1-1
1P6-1, 4P1-1
(200 V series)
2P7-1
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