Dinverter
A
User Guide
Issue code: d2au9
16
4.3
Planning the installation
Temperature de-rating
1
Refer to Figure 4–1 to find the maximum ambient temperature that is
permissible at the required maximum output current. Make a note of
this value.
50
40
30
122
104
86
°C
°F
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
4.3A
25°C
77°F
Motor current (A)
Ambient
temperature
1.55A
20
68
10
50
0
32
1.85A
15°C
59°F
2.3A
2.1A
20°C
68°F
10°C
50°F
3kHz
6kHz
9kHz
12kHz
Figure 4–1
De-rating curves for all model sizes at 3kHz
PWM
switching
frequency (other frequencies shown for reference)
Length of motor cable
RFI-filter ground-leakage current
When compliance with EMC emissions standards is required, and the length
of the motor cable is to exceed 15 metres (50 feet), it is possible a
compromise will need to be made for the following:
•
Motor cable length
•
The ground-leakage current of the RFI filter
Note
When compliance with EMC emission standards is required,
the length of the motor cable must not exceed 100 metres
(330 feet).
