How to select a filter
vacon •
21
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
4
Other than default cable
In general, the allowed cable length can be calculated as a ratio between the default
cable and actual cable capacitances. As an example, if filter 130B2836 has cable
MCMK 3 x 25 + 16 (45 nF/100 m) instead of the default MCMK 3 x 10 +10, the max
cable length is calculated as follows:
40 nF / 45 nF x 150 m = 133 m
Parallel cables
In case of parallel connected cables, the actual capacitance is the sum of the cable
capacitances. That is, if filter 130B2836 has 2 x MCMK 3 x 10 + 10 cables in parallel,
50 m long each, the total length is considered to be 2 x 50 m = 100 m. In that case, the
safe operating curve gives the max switching frequency: Fs = 2.8 kHz.
Summary of Contents for 100 INDUSTRIAL
Page 2: ......