Control Techniques DIN1220075A

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 4.50
4.3A
25°C
77°F
Motor current (A)
Ambient
temperature
1.55A
20 68
10 50
032
1.85A
15°C
59°F
2.3A2.1A
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).