Technical data 349
EMC compatibility and motor cable length
To comply with the European EMC Directive (standard IEC/
EN 61800-3), use the following maximum motor cable lengths for
4 kHz switching frequency.
Note:
The internal EMC filter must be disconnected by removing the
EMC screw (see the figure on page
) while using the low leakage
current EMC filter (LRFI-XX).
Note:
Radiated emissions are according to C2 with and without an
external EMC filter.
Note:
Category C1 with conducted emissions only. Radiated
emissions are not compatible when measured with standard
emission measurement setup and should be checked or measured
on cabinet and machine installations case by case.
Note:
In multimotor systems, the calculated sum of all motor cable
lengths must not exceed the maximum motor cable length given in
the table.
Note:
The external EMC filter must be installed onto a metal plate to
ensure efficient cooling.
All frame
sizes
Maximum motor cable length, 4 kHz
m
ft
With internal EMC filter
Second environment
(category C3
1)
)
30
100
First environment
(category C2
1)
)
-
-
First environment
(category C1
1)
)
-
-
With optional external EMC filter
Second environment
(category C3
1)
)
30 (at least)
2)
100 (at least)
2)
First environment
(category C2
1)
)
30 (at least)
2)
100 (at least)
2)
First environment
(category C1
1)
)
10 (at least)
2)
30 (at least)
2)
1)
See the terms in section
2)
Maximum motor cable length is determined by the drive’s
operational factors. Contact your local ABB representative for the
exact maximum lengths when using external EMC filters.
Aotewell Ltd
www.aotewell.com
Industry Automation
HongKong|UK|China
+86-755-8660-6182
