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7.3 Grouding
7.3.2 Wiring-related malfunction causes and the measures examples
The malfunction occurred by the potential difference caused by the groundings in such a case, may be
prevented by reducing the voltage with the following measure example 1, where the voltage is reduced.
Measure example 1 (Refer to the measure examples 1-1 and 1-2 below.)
When any potential difference occurs between the ground cable and the panel having the GOT and the
GOT is influenced by the potential difference, connect another ground cable to the panel.
When taking of measure 1-1 is difficult since the wiring cannot be done for example, perform the wiring
as shown in 1-2.
.
If the GOT is affected by noise when measure example 1 is taken, the influence of noise may be
reduced with the following measure example 2.
Measure example 2 (Refer to the measure examples 2-1 and 2-2 below.)
When the noise generated from the panel affects the GOT even if measure example 1 is taken, attach
the ferrite core (KITAGAWA INDUSTRIES CO.,LTD. RFC-H13 or equivalent product).
When attaching a ferrite core, insert the wire into the hole of the ferrite core several times
(approximately three times).
When taking of measure 2-1 is difficult since the wiring cannot be done for example, perform the wiring
as shown in 2-2.
Measure example 1-1 Measure example 1-2
Measure example 2-1 Measure example 2-2
GOT
Ground to
the panel.
Ground cable
Use a short
and thick
wire as
possible.
FG
LG
Connection
cable
GOT
Ground to
the panel.
Ground cable
FG
LG
Connection
cable
GOT
Ground to
the panel.
Ferrite core
Ground cable
Use a short
and thick
wire as
possible.
FG
LG
Connection
cable
GOT
Ground to
the panel.
Ground cable
FG
LG
Connection
cable
Ferrite core
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