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Figure 6-13
6.2.12
Connecting-up a converter
Selecting and connecting the cable
To connect the motor to a converter, use Motion-Connect cables or shielded connection
cables. The cable shielding, made up of as many strands as possible, must have a high
electrical conductivity. Braided shields made of copper or aluminum are well suited.
The shield must be connected at both ends to the motor and the converter; unshielded cable
ends must be kept as short as possible.
To ensure that high-frequency currents are effectively discharged, establish the shield
connection through the largest possible area, as 360° contact at the converter and at the
motor, e.g. using EMC glands at the cable entry points.
6.2.13
Converter operation on a grounded line supply
Parallel protective conductor
In the case of current-limited converters without ground fault monitoring, protective conductor
currents of up to 1.7 times the phase current can flow if there is a ground fault at the output.
Synchronous/induction motors 1PH813
Operating Instructions, 04/2009, 610.48000.22
Connecting the separately-driven fan by means of the connector
CAUTION
To protect the fan against improper use (block protection), a suitable motor circuit
breaker that supports all-pole disconnection must be installed. The fan must be
operated via this motor circuit breaker.
A protective circuit must be implemented that prevents the main machine from being
activated when the fan unit is not in operation.
Connection
6.2 Electrical connection
49
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