Mitsubishi Electric GOT SIMPLE Series Operation Manual page 94

■Countermeasure example 1
When any potential difference between the ground cable and the control panel having the GOT affects the GOT, also connect
the ground cable to the control panel.
When Countermeasure example 1-1 is difficult to be taken, such as the wiring is impossible, carry out wiring as shown in
Countermeasure example 1-2.
Measure example 1-1
Connection
cable
FG
Ground wires
Use as short
and thick a wire
as possible.
If noise further affects the GOT by taking Countermeasure example 1, Countermeasure example 2 may reduce the influence
of noise.
■Countermeasure example 2
If the noise from the control panel having the GOT adversely affects the GOT even after Countermeasure example 1 is taken,
attach the ferrite core (KITAGAWA INDUSTRIES CO.,LTD. RFC-H13 or equivalent).
When attaching a ferrite core, insert the cable through the ferrite core several times (approximately three times).
When Countermeasure example 2-1 is difficult to be taken, such as the wiring is impossible, carry out wiring as shown in
Countermeasure example 2-2.
Measure example 2-1
Connection
cable
FG
Ground wires
Use as short
and thick a wire
as possible.
8 WIRING OF POWER SUPPLY SECTION
92
8.3 Grounding
GOT
Grounding to
the panel
GOT
Ferrite core
Grounding to
the panel
Measure example 1-2
Connection
cable
FG
Ground wires
Grounding to
the panel
Measure example 2-2
Connection
cable
FG
Ground wires
Grounding to
the panel
GOT
GOT
Ferrite core