Motor Cable - Lenze MOBILE DCU Hardware Manual

5 Installation
EMC−compliant installation

Motor cable

5.4.4 Motor cable
Only use shielded motor cables with braids made of tinned or nickel−plated copper.
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Shields made of steel braids are not suitable.
– The overlap rate of the braid must be at least 70 % with an overlap angle of 90 °.
The cables used must correspond to the requirements at the location (e.g.
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EN 60204−1).
Use Lenze system cables.
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Extensively apply the shielding with the compressed cable gland and ensure
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electrical conductivity.
The motor cable is optimally installed if
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– it is separated from mains cables and control cables,
– it only crosses mains cables and control cables at right angles,
– it is not interrupted.
If the motor cable must be opened all the same (e.g. due to contactors, or terminals):
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– The unshielded cable ends may not be longer than 100 mm (depending on the
cable cross−section).
– Install contactors, terminals etc. spatially separated from other components (with
a min. distance of 100 mm).
– Install the shield of the motor cable directly before and behind the point of
separation to the conducting mounting plate with a large surface.
Connect the shield with a large surface to PE in the terminal box of the motor at the
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motor housing.
– Metal EMC cable glands at the motor terminal box ensure a large surface
connection of the shield with the motor housing.
Wiring on the motor side
(
Stop!
The motor cable is highly susceptible to interference. The following measures
enable you to achieve an optimum wiring on the motor side:
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46
Exclusively use shielded and low−capacitance motor cables.
If possible, integrate the equipotential bonding conductor inside the motor
cable shield or install it in parallel to the motor cable.
Do not integrate any further cables (e.g. for blowers etc.).
Shield the supply cable for temperature monitoring of the motor (PTC or
thermostat) and install it separately from the motor cable.
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EDSMDAG EN 2.0