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MITSUBISHI CNC
Appendix 2 EMC Installation Guidelines
Appendix 2.6.3 Surge Absorber
Make sure that the surge does not directly enter the AC line of the general-purpose stabilized power supply (user-
prepared) supplying power to the control unit and DIO. Select the following product or equivalent for the surge absorber.
Refer to the manufacturer catalog for detailed characteristics, outline and connection methods of the surge absorber.
(1) Part name: RAV-781BYZ-2
Manufacturer: OKAYA ELECTRIC INDUSTRIES
Circuit voltage
Max. tolerable
50/60Hz Vrms
circuit voltage
300V
250V 3φ
Outline drawing
41 ± 1
(2) Part name: RAV-781BXZ-4
Manufacturer: OKAYA ELECTRIC INDUSTRIES
Circuit voltage
Max. tolerable
50/60Hz Vrms
circuit voltage
300V
250V 3φ
Outline drawing
41 ± 1
204
Clamp voltage V
Surge withstand
± 10%
level 8/20μs
783V
2,500A
Circuit drawing
(a)
Black
(b)
UL-1015 AWG16
Unit
mm
Clamp voltage V
Surge withstand
± 10%
level 8/20μs
700V
2,500A
Circuit drawing
(a) Black (b) Black (c) Black
UL-1015 AWG16
Unit :
mm
Surge electrical
discharge start
Static capacity
voltage 1.2/50μs
20kV
75pF
Black
(c)
Black
Surge electrical
discharge start
Static capacity
voltage 1.2/50μs
2kV
75pF
Green
Working
temperature
range
-20 to +70°C
Working
temperature
range
-20 to +70°C
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