Recommended connection
Connect the separately driven fan via the terminal box of the separately driven fan or optionally
via a power connector. Implement operation of the fans via the motor circuit breaker. A simple
conductor protection is sucient for the EC fans.
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Figure9-24 Recommended connection
Note
Single-phase fan connection
If you use a 3-pole circuit breaker for a 1-phase fan connection for shaft height 80, then you must
connect the 3 current paths in series (see the diagram).
If only one current path would be used, many circuit breakers would trip too early because they
often also monitor balanced load or voltage on the 3 line conductors. You must determine
whether this circuit is permissible with electronic motor circuit breakers on a case-by-case basis
from the product data sheets of the specic manufacturer.
Electrical connection
9.3System integration
1PH8 SIMOTICS M main motors
244 Conguration Manual, 12/2022, A5E51895839A
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