Installation
3.5 EMC installation guidelines
Getting Started
24 Getting Started, FW V4.5, A5E03404762A AB
The line supply cable of the inverter can be unshielded. The converter has to be grounded
by this cable.
The shielded motor cable provides high-frequency equipotential bonding between the
converter and the motor terminal box. The shield of the motor cable has to be connected to
the motor connector body
③. On the motor side the shield has to be connected to the
terminal box using an electrically conductive PG gland
④.
The connection
② provides solid bonding for high-frequency currents between the metal
body of the converter and the unpainted metal mounting frame. This connection should be
made with short, finely stranded, braided copper wires.
Additional measures
Finely stranded, braided copper cables have to be routed in parallel with the cable shields in
the following cases:
● Old installations with already existing unscreened cables
● Cables with poor high-frequency properties
● Installations with bad grounding systems
The connections in the figure below provide a solid, high-frequency bonding between the
motor housing, the motor terminal box, the driven machine and the converter.
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Figure 3-6 Additional high-frequency bonding of the drive system
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