Shielding And Emc - Deif IMD 100 Series Integration Manual

IMD 100 Integration manual 4189360015 Rev. G

5.1 Shielding and EMC

If the IMD is used in a wind turbine or any other environment where EMC (ElectroMagnetic
Compatibility) protection is required, shielding from cabinet to cabinet (or cabinet to unit) is required. In
such cases the cable shielding is connected directly to PE and cabinet earthing, and may not be used
for anything else (such as CAN GND). The EMC protection shielding is though also effective as
shielding against interference to the signal wires. In essence, any cable from outside the cabinet is
shielded, and the shield needs to connected to PE. It is important that these cable shields are
connected to both cabinet (through EMC glands) and the IMD (through the connector housing or any
other means).
Requirements for cables: any cables going through the cabinet walls must be shielded and the
shields must be connected to PE.
The following illustration illustrates the principle of the protection:
Cabinet 1
Pitch
motion/Main
controller
PE
EMC
gland
Connection point: Shield to PE
Figure 16 Cable shielding example
The following figure illustrates how the two types of connections are realized in a connector. Since
there are different types of connectors and cables, this illustration is an example only.
www.deif.com/wind-power
Cabinet 2
IMD
PE
EMC
glands
resolver
Electrical HW connections and requirements
CANopen
connected
unit
To another cabinet
Motor
PE
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