Shielding; Hv On−Board Cable - Lenze MOBILE DCU Hardware Manual

5.4.2

Shielding

The effectiveness of a shielded cable is reached by:
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– Providing a good shield connection through large−surface shield contact.
– Using only braided shields with low shield resistance made of tin−plated or
nickel−plated copper braid.
– Using braided shields with an overlap rate > 70 % and an overlap angle of 90 °.
– Keeping unshielded cable ends as short as possible.
Use system cables or shielded cables for these connections:
Motor
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HV on−board supply system
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The following connections need not be shielded:
LV on−board supply system (only PSU)
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24−V supply
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Digital signals (inputs and outputs).
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– We recommend to use shielded cables for a cable length from approximately 5 m
on or in environments with strong interferences.
Connection system
Prefabricated cables for the motor connection and the connection to the HV on−board
supply system are provided with cable glands and ensure an optimum connection of the
shield to the vehicle mass. This guarantees an optimum EMC−compliant installation and
the required environmental conditions are met.
When installing the motor cable and the HV on−board cable, slide the cable gland
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into the respective holders and fix it by tightening the mounting bracket.
5.4.3 HV on−board cable
The descriptions in the next chapter regarding shielded motor cables analogously also
apply to the HV mains cables (see next chapter).
EDSMDAG EN 2.0
EMC−compliant installation
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Installation
Shielding
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