Omron OMNUC G Series User Manual page 233

 Leakage Breakers
 Select leakage breakers designed for protection against grounding faults.
 Because switching takes place inside the Servo Drives, high-frequency current leaks from the
switching elements of the Servo Drive, the armature of the motor, and the cables.
High-frequency breakers with surge withstand capability do not detect high-frequency current,
preventing the breaker from operating with high-frequency leakage current.
When using a general-purpose leakage breaker, use three times the sum of the leakage current
given in the following table as a reference value.
 When selecting leakage breakers, remember to add the leakage current from devices other than
the Servomotor, such as machines 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 ten
times the total of all leakage current values.
 The leakage breaker is activated at 50% of the rated current. Allow leeway when selecting a
leakage breaker.
 For details on leakage breakers, refer to the manufacturer's catalog.
 The following table shows the Servomotor leakage current for each Servo Drive model.
Servo Drive model Input power
R88D-GNA5L-ML2 Single-phase 100 V
R88D-GN01L-ML2 Single-phase 100 V
R88D-GN02L-ML2 Single-phase 100 V
R88D-GN04L-ML2 Single-phase 100 V
R88D-GN01H-ML2 Single-phase 200V
R88D-GN02H-ML2 Single-phase 200V
R88D-GN04H-ML2 Single-phase 200V
R88D-GN08H-ML2 Single-phase 200V
R88D-GN10H-ML2 Single-phase 200V
R88D-GN15H-ML2 Single-phase 200V
R88D-GN08H-ML2 Three-phase 200 V
R88D-GN10H-ML2 Three-phase 200 V
R88D-GN15H-ML2 Three-phase 200 V
R88D-GN20H-ML2 Three-phase 200 V
R88D-GN30H-ML2 Three-phase 200 V
R88D-GN50H-ML2 Three-phase 200 V
R88D-GN75H-ML2 Three-phase 200 V
Note1. The above leakage current is for cases when Servomotor power cable length is 3 meters or shorter.
(The leakage current depends on the power cable length and the insulation.)
Note2. The resistor plus capacitor method provides a yardstick to measure the leakage current that may flow
through the human body when the Servomotor or Servo Drive is not grounded correctly.
The above leakage current is for normal temperature and humidity. (The leakage current depends on the
temperature and humidity.)
4-3 Wiring Conforming to EMC Directives
Resistance method
Resistor plus capacitor
Motor cable length: 3 m Motor cable length: 3 m Per meter of motor cable
0.42 mA
0.45 mA
0.46 mA
0.48 mA
0.92 mA
0.94 mA
1.15 mA
1.27 mA
1.27 mA
1.51 mA
1.62 mA
1.77 mA
2.18 mA
2.88 mA
2.83 mA
3.07 mA
6.32 mA
Leakage current
Clamping method
(Measurement filter ON at H10K13283)
0.33 mA 0.003 mA
0.35 mA 0.002 mA
0.35 mA 0.002 mA
0.35 mA 0.002 mA
1.04 mA 0.016 mA
1.06 mA 0.013 mA
1.13 mA 0.013 mA
1.09 mA 0.014 mA
1.19 mA 0.015 mA
1.20 mA 0.015 mA
0.98 mA 0.009 mA
1.03 mA 0.008 mA
1.04 mA 0.003 mA
1.08 mA 0.008 mA
1.15 mA 0.011 mA
1.14 mA 0.011 mA
1.23 mA 0.013 mA
4
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