Appendix 1.6.3 Surge Absorber - Mitsubishi Electric C70 Connection Manual

Appendix 1.6.3 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 CNC control unit and the peripheral devices. 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
50/60Hz Vrms
250V 3-phase
O utline drawing
(2) Part name: RAV-781BXZ-4
Manufacturer: OKAYA ELECTRIC INDUSTRIES
Circuit voltage
50/60Hz Vrms
250V 3-phase
Outline drawing
Clamp
Max. tolerable
voltage
circuit voltage
V±10%
300V 783V
Circ uit drawing
4 1 1
Clamp
Max. tolerable
voltage
circuit voltage
V±10%
300V 700V
Circuit drawing
41 1
Appendix 1.6 EMC Countermeasure Parts
Surge electrical
Surge
discharge start
withstand level
voltage
8/20μs
1.2/50μs
2500A 20kV
(a) Black (b) Black (c) Black
UL -1 015 A W G1 6
Un it: mm
Surge electrical
Surge
discharge start
withstand level
voltage
8/20μs
1.2/50μs
2500A 2kV
(a) Black (b) Black (c) Black
UL-1015 AWG1 6
C70 Connection Manual
Working
Static
temperature
capacity
range
75pF -20 to +70°C
Working
Static
temperature
capacity
range
75pF -20 to +70°C
Green
Unit: mm
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