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3.5.
Notes for Wiring and Electrical Wire Size
3.5.1.
Notes for Wiring
(1) Input the specified voltage into the converter terminals [L1/R], [L2/S], [L3/T], [+] and [-].
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If you input the voltage specified for the 400 V class into the 200 V class converter,
the converter will be damaged.
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If you input the voltage specified for the 200 V class into the 400 V class converter,
it may lead to malfunction or damage to the converter.
(2) IGBT is used in the converter, and the converter operates at a high frequency. Therefore, noise is emitted.
Consider the following points for wiring:
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Keep main circuit wires away from a control signal wire. When placing them in parallel, keep a distance
of 30 cm or longer between them.
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When crossing them, ensure that they are crossed at right angles.
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It is recommended that the main circuit wire should be contained into a metal pipe as a measure against
noise for other facilities.
(3) To prevent noise contamination, use a shielded wire or a shielded twisted pair wire for the control signal
wire.
(4) When the wiring of the 400 V class converter is 100 m or longer in length
Due to the wiring, surge voltage may be generated in the device connected to the output terminal.
Take the following measure:
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Connect a surge voltage suppression filter on the converter side.
Paralleled case
Intersected case
Control signal wire
30 cm or more
Control signal wire
Crossed at right angles
Main circuit
wires
Main circuit
wires
