Mitsubishi Electric MELDASMAGIC64 Connection Manual page 118

(2) Surge protector installation example
Earth leakage
breaker for
From power
supply panel
Input
200/
230VAC
Grounding
<Caution>
(1) Thick wires will enhance the lighting surge absorption effect, so keep the wire as thick and short as
possible.
-Wire material-
Wire diameter:
Wire length:
(2) When carrying out an insulation voltage resistance test with an overvoltage (100VAC, 1500VAC)
applied on the power supply line, remove the serge protector (2) since it will function under the
applied voltage.
(3) A short-circuit accident will occur if a surge exceeding the tolerance is applied on the surge
protector. Thus, always insert a circuit protector to protect the power supply line.
The current does not flow constantly to surge protectors (1) and (2), so the circuit protector can
also be used for the other devices.
Appendix 3 Parts for EMC Measures
Appendix 3.3 Surge Protector
Transformer
No-fuse
MC
breaker
A
Surge protector (1)
Circuit
protector
Surge protector (2)
B
Grounding plate
Surge protector installation method
2
2mm or more
Connection length (A) to surge protector (1) is 2m or less.
Connection length (B) to surge protector (2) is 2m or less.
106
No-fuse
breaker
NC control
section
Other device
Power supply
for panel, etc.
Reactor
NC drive
section
Other device
Power supply
for panel, etc.
Control panel
(Relay panel,
etc.)