Appendix A – ACS/ACC/ACP 601 Technical Data
A-4 ACS/ACC/ACP 601 Frequency Converters
Output Current
Temperature Derating
The output current is calculated by multiplying the current given in the
rating table by the derating factor.
Temperature derating factor for degree of protection IP 21/22:
•
General rule:
Above +40 °C / +104 °F (+35 °C / +95 °F for types
ACS 60x-0120-03 and ACS 60x-0140-5 with
I
2Nsq
rating), the rated
output current is decreased 3.5 % for every additional 1 °C / 1.8 °F
(up to +50 °C / +122 °F).
•
Example 1.
If the ambient temperature is 50 °C / +122 °F the
derating factor is
100 % - 3.5 · 10 °C = 65 % or 0.65.
The output current is then 0.65 ·
I
2N
, 0.65 ·
I
2hd
or 0.65 ·
I
2Nsq
.
Derating factor for ACx 601 with degree of protection IP 54:
• From +25 °C to +40 °C, the output current is calculated using the
table below.
• Above +40 °C, the output current is decreased 3.5 % for every
additional 1 °C (up to +50 °C).
•
Example 1
. If the ambient temperature is 38 °C, the derating factor
for ACx 601-0006-3 is 95 % or 0.95 (Curve 2). The output current is
then 0.95 ·
I
2N
.
•
Example 2.
If the ambient temperature is 50 °C, the output current
for ACx 601-0006-3 is first calculated at 40 °C (
I
2N
: derating factor
92 % or 0.92 from Curve 2) and the result is multiplied by factor 0.65
(See
Example 1
(IP 22)). The output current is then 0.92 · 0.65 ·
I
2N
.
For
I
2hd
the output current must be smaller or equal than
0.92 · 0.65 ·
I
2N
.
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