Справочник Пользователя для Mitsubishi Electronics C6/C64

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APPENDIX 9    EMC INSTALLATION GUIDELINES 
Appendix 9.6    Parts for EMC Countermeasures 
 
 
I - 118 
(2)  Example of surge absorber installation 
 
 
Example of surge absorber installation 
Control panel 
(Relay panel, 
etc.) 
Surge absorber (2) 
Surge absorber (1) 
Earth 
leakage 
breaker 
for panel 
Input 
200V/ 
230VAC 
No-fuse 
breaker 
No-fuse 
breaker 
MC
Reactor
Transformer 
Circuit 
protector 
Grounding 
Grounding 
From power 
supply 
C
B
A
NC drive 
section 
Other devices 
(power supply   
for panel, etc.) 
Other devices 
(panel power 
supply, etc.) 
NC control   
section 
 
 
Precautions 
(1)  Thick wiring enhances the lightning surge absorption effect, so make the wiring se as thick and 
short as possible. 
Wire material  :  Wire diameter 2mm
2
 or more 
Wire length 
:  Connection to surge absorber (1): Wire length (A) is 2m or less 
Connection to surge absorber (2): Wire length (B) is 2m or less 
Grounding to surge absorber (2) : Wire length (C) is 2m or less   
(2)  When carrying out a withstand voltage test by applying an overvoltage on the power line, 
remove surge absorber (2) as it will activate with the applied voltage. 
(3)  A short-circuit fault will occur if a surge exceeding the tolerance is applied on the surge 
absorber. Thus, always insert a circuit protector to protect the power supply line. 
 
A current does not flow to surge absorber (1) and (2) during normal use, so the circuit protector 
can be shared with other devices.