Mitsubishi Electric GOT1000 General Description Manual page 64

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.
.
Ground
cable
Use a thick wire as
possible.
Measure example 1-1
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.
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.
Ground cable
Use a thick wire as
possible.
Measure example 2-1
Connection
cable
GOT
FG
LG
Ground to
the panel.
Connection
cable
GOT
FG
LG
Ferrite core
Ground to
the panel.
Ground cable
Measure example 1-2
Ground cable
Measure example 2-2
49
Connection
cable
GOT
FG
LG
Ground to
the panel.
Connection
cable
GOT
FG
LG
Ferrite core
Ground to
the panel.