4-30
4-3 Wiring Conforming to EMC Directives
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
4
System Design
Leakage Breaker
Select leakage breakers designed for protection against ground faults.
When selecting leakage breakers, remember to add the leakage current from devices other than
the motor, such as devices using a switching power supply, noise filters, inverters, and so on.
To prevent malfunction due to inrush current, we recommend using a leakage breaker of 10 times
the total of all leakage current values.
The leakage breaker is activated at 50% of the rated current. Select a leakage breaker with
enough capacity.
For details on leakage breakers selection method, refer to the manufacturer's catalog.
Because switching takes place inside the Servo Drives, high-frequency current leaks from the SW
elements of the Servo Drive, the armature of the motor, and the cables.
High-frequency, surge-resistant leakage breakers, because they do not detect high-frequency
current, can prevent operation with high-frequency leakage current.
When using a general leakage breaker, use 3 times the total of the leakage current given in the
following table as a reference value.
Drive model
Inrush current (A0-p)
Main circuit
power supply
Control circuit
power supply
R88D-KN06F-ML2 28 48
R88D-KN10F-ML2 28 48
R88D-KN15F-ML2 28 48
R88D-KN20F-ML2 32 48
R88D-KN30F-ML2 32 48
R88D-KN50F-ML2 32 48
Servo Drive model Input power supply
Leakage current
(Cable: 3 m)
Increase per 10 m
of cable
R88D-KNA5L-ML2 Single-phase 100 V 0.38 mA
0.1 mAR88D-KN01L-ML2 Single-phase 100 V 0.39 mA
R88D-KN02L-ML2 Single-phase 100 V 0.41 mA
R88D-KN04L-ML2 Single-phase 100 V 0.46 mA 0.12 mA
R88D-KN01H-ML2
Single-phase 200 V 0.83 mA
0.23 mA
3-phase 200 V 1.03 mA
R88D-KN02H-ML2
Single-phase 200 V 0.84 mA
3-phase 200 V 1.02 mA
R88D-KN04H-ML2
Single-phase 200 V 0.96 mA
0.3 mA
3-phase 200 V 1.27 mA
R88D-KN08H-ML2
Single-phase 200 V 1.01 mA
1.1 mA
3-phase 200 V 1.39 mA
R88D-KN10H-ML2
Single-phase 200 V 0.88 mA
0.93 mA
3-phase 200 V 1.14 mA
R88D-KN15H-ML2
Single-phase 200 V 0.96 mA
3-phase 200 V 1.18 mA
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