4-31
4-3 Wiring Conforming to EMC Directives
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
4
System Design
Note: These values vary greatly depending on the installation conditions of the motor power cable and
the measurement conditions. Use them for reference only.
Surge Absorber
Use surge absorbers to absorb lightning surge voltage and abnormal voltage from power supply
input lines.
When selecting surge absorbers, take into account the varistor voltage, the surge immunity and
the energy tolerated dose.
For 200-VAC systems, use surge absorbers with a varistor voltage of 620 V.
The surge absorbers shown in the following table are recommended.
Note 1. Refer to the manufacturers' catalog for operating details.
Note 2. The surge immunity is for a standard impulse current of 8/20 s. If pulses are wide, either
decrease the current or change to a larger-capacity surge absorber.
R88D-KN20H-ML2 3-phase 200 V 1.53 mA
1.23 mAR88D-KN30H-ML2 3-phase 200 V 1.52 mA
R88D-KN50H-ML2 3-phase 200 V 1.39 mA
R88D-KN06F-ML2 3-phase 400 V 2.28 mA
1.8 mA
R88D-KN10F-ML2 3-phase 400 V 2.20 mA
R88D-KN15F-ML2 3-phase 400 V 2.55 mA 2.03 mA
R88D-KN20F-ML2 3-phase 400 V 2.92 mA 2.4 mA
R88D-KN30F-ML2 3-phase 400 V 3.92 mA 3.23 mA
R88D-KN50F-ML2 3-phase 400 V 3.54 mA 2.9 mA
Servo Drive model Input power supply
Leakage current
(Cable: 3 m)
Increase per 10 m
of cable
Manufacturer
Model Surge immunity Type Comment
Okaya Electric
Industries Co.,
Ltd.
R•A•V-781BWZ-4
700 V 20% 2500 A
Block
Single-phase 100/
200 VAC
Okaya Electric
Industries Co.,
Ltd.
R•A•V-781BXZ-4
700 V 20% 2500 A
3-phase 200 VAC
Okaya Electric
Industries Co.,
Ltd.
R•A•V-801BXZ-4
800 V 20% 2500 A
3-phase 400 VAC
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