Installation
4.2 Electrical Installation
Converter with control units CU250D-2
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Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
4.2.16
Equipotential bonding
Grounding and high-frequency equipotential bonding measures
Equipotential bonding within the drive system has to be established by connecting all
electrical and mechanical drive components (transformer, motor and driven machine) to the
grounding system. These connections are established by means of standard heavy-power
PE cables, which do not need to have any special high-frequency properties.
In addition to these connections, the inverter (as the source of the high-frequency
interference) and the motor must be interconnected with respect to the high-frequency point
of view:
1.
Use a shielded motor cable.
2.
Connect the cable shield both to the motor connector on the inverter and to the motor
terminal box.
3.
Use a short grounding connection from the PE terminal on the inverter to the metal frame.
The following figure illustrates all grounding and high-frequency equipotential bonding
measures using an example.