Chapter 3 Installation and Wiring GK600E User Manual
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Signal lines should be provided w ith shielded layer and reliably grounded. Alternatively, signal
cable could be put into metallic conduits betw een w hich the distance shall be no less than
20cm, and shall be kept as far aw ay from the drive, its peripheral devices, and cables as
possible. Never make signal lines in parallel w ith pow er lines or bundle them up.
Signal lines must orthogonally cross pow er lines if this cross is inevitable. Motor cables shall be
placed in thick protective screen like more than 2mm-thick pipelines or buried in cement groove,
also, pow er lines can be put into metallic conduit and grounded w ell w ith shielded cables.
Use 4-core motor cables of w hich one is grounded at close side of the drive and the other side
is connected to motor enclosure.
Input and output terminals of the drive are respectively equipped w ith radio noise filter and
linear noise filter. For example, ferrite common mode choke can restrain radiation noise of
pow er lines.
3.11.2 Grounding
Recommended ground electrode is show n in the figure below :
Drive
Other
Devices
PE
PE
Fig. 3-23 Grounding
Use to the fullest extent the maximum standard size of grounding cables to reduce the impedance
of grounding system.
Grounding w ires should be as short as possible. Grounding point shall be as close to the drive as
possible.
One w ire of 4-core motor cables shall be grounded at the drive side and connected to grounding
terminal of motor at the other side. Better effect w ill be achieved if motor and drive are provided
w ith dedicated ground electrodes.
When grounding terminals of various parts of system are linked together, leakage current turns
into a noise source that may influence other equipment in the system, thus, grounding terminals of
the drive and other vulnerable equipment should be separ ated. Grounding cable shall be kept
aw ay from inlet & output of noise-sensitive equipment.
