Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 429

Selection example
Indicated below is an example of selecting an earth-leakage current breaker under the following conditions.
2
2 mm × 5 m
NV
Servo amplifier
MR-J4-40GF
Ig1 Iga
Use an earth-leakage current breaker designed for suppressing harmonics/surges.
Find the terms of equation (11.1) from the diagram.
5
Ig1 = 20 • = 0.1 [mA]
1000
5
Ig2 = 20 • = 0.1 [mA]
1000
Ign = 0 (not used)
Iga = 0.1 [mA]
Igm = 0.1 [mA]
Insert these values in equation (11.1).
Ig  10 • {0.1 + 0 + 0.1 + 1 • (0.1 + 0.1)}
Ig  4 [mA]
According to the result of calculation, use an earth-leakage current breaker having the rated sensitivity current (Ig) of 4.0 mA
or more.
Use an earth-leakage current breaker having Ig of 15 mA with the NV-SP/SW/CP/CW/HW series.
2
2 mm × 5 m
Servo motor
M
HG-KR43
Ig2 Igm
11 OPTIONS AND PERIPHERAL EQUIPMENT
11.15 Earth-leakage current breaker
11
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