Lenze i550 Series - Page 42

Motor cable
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Only use low-capacitance and shielded motor cables with braid made of nned or nickel-
plated copper.
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The overlap rate of the braid must be at least 70 % with an overlap angle of 90 °.
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Shields made of steel braids are not suitable.
•
Shield the cable for motor temperature monitoring (PTC or thermal contact) and install it
separately from the motor cable.
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In Lenze system cables, the cable for brake control is integrated into the motor cable. If
this cable is not required for brake control, it can also be used to connect the motor
temperature monitoring up to a length of 50 m.
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Only certain inverters are provided with this connecon facility.
•
Connect the shield with a large surface and x it with metal cable binders or conducve
clamp. The following is suitable for the connecon of the shield:
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The mounng plate
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A central grounding rail
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A shielding plate, if necessary, oponal
•
This is opmal:
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The motor cable is separated from the mains cables and control cables.
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The motor cable only crosses mains cables and control cables at right angles.
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The motor cable is not interrupted.
•
If the motor cable must be opened all the same (e. g. by chokes, contactors, or terminals):
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The unshielded cable ends must not be longer than 100 mm (depending on the cable
cross-secon).
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Install chokes, contactors, terminals etc. spaally separated from other components
(with a minimum distance of 100 mm).
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Install the shield of the motor cable directly before and behind the point of separaon
to the mounng plate with a large surface.
•
Connect the shield with a large surface to PE in the terminal box of the motor at the motor
housing.
-
Metal EMC cable glands at the motor terminal box ensure a large surface connecon of
the shield with the motor housing.
Control cables
•
Install the cables so that no inducon-sensive loops arise.
•
Distance of shield connecons of control cables to shield connecons of motor cables and
DC cables:
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At least 50 mm
•
Control cables for analog signals:
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Must always be shielded
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Connect the shield on one side of the inverter
•
Control cables for digital signals:
Cable length
< ca. 5 m ca. 5 m ... ca. 30 m > ca. 30 m
Design unshielded opon unshielded twisted opon always shielded
connected on both sides
Network cables
•
Cables and wiring must comply with the specicaons and requirements of the used net-
work.
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Ensures the reliable operaon of the network in typical systems.
Informaon on project planning
Control cabinet structure
EMC-compliant installaon
42