EURONORM JI500, Руководство пользователя

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Hub van Doorneweg 8 • 2171 KZ Sassenheim – NL • T +31(0)252 228850 • F +31(0)252 228235 • E sales@euronorm.nl • I euronormdrives.com Hub van Doorneweg 8 • 2171 KZ Sassenheim – NL • T +31(0)252 228850 • F +31(0)252 228235 • E sales@euronorm.nl • I euronormdrives.com 70 71
NEURN030000_220_A NEURN030000_220_A
11 Options
11.1 Power cables
The dimension of input power cable and motor cable should meet the local provision:
Input power cable and motor cable should bear the related load current.
The maximum rated temperature margin conditions of the motor cable should not be sustained below 70 degrees.
Conductivity of the PE conductor and phase conductor capacity are the same(Same cross-sectional area),
About EMC requirements, see “EMC Guidance Content”
To meet the CE EMC requirements, a symmetrical shielded motor cable must be used (See figure below).
For input cables can use four-core cable, but still recommended to use shielded symmetrical cable.
Compared to a four-core cable, shielded symmetrical cables can not only reduce the loss and cost of the current flowing
through the motor cable, but also can reduce the electromagnetic radiation.
PE conductor
shield
conductor
Jacket
Insulation
shield
PE
Symmet ri cal shi el ded mot or cabl es
Four- core cabl e
PE conductor
conductor
Jacket
Jacket
Insulation
Insulation
Note: If conductivity of the cable shield can not meet the requirements, you must use a separate PE conductor.
To play a protective role of conductor, when the shield wire and phase conductors using the same material, the cross-
sectional area of the shield wire and phase conductors cross-sectional area must be the same, aims to reduce grounding
resistance, impedance continuity better.
To effectively suppress RFI transmission and conduction, the shield conductivity must be at least 1/10 of the phase
conductor conductivity. For copper or aluminum shield, this requirement is very easy to meet. Minimum requirements for
the drive motor cable as shown below. Cable comprising a layer of copper spiral. Shield tight as possible, that the more
tightly the more we can effectively suppress radiated electromagnetic interference.
Insulating layer Shield
Cable cross section