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12. OPTIONS AND AUXILIARY EQUIPMENT
(2) Selection example
Indicated below is an example of selecting a leakage current breaker under the following conditions.
M
Servo
amplifier
MR-J2S-60B
Servo motor
HC-MFS73
Ig1 Ig2
Iga Igm
NV
2mm2 5m 2mm2 5m
Use a leakage current breaker designed for suppressing harmonics/surges.
Find the terms of Equation (12.1) from the diagram.
Ig1 20 1000
50.1 [mA]
Ig2 20 1000
50.1 [mA]
Ign 0 (not used)
Iga 0.1 [mA]
Igm 0.1 [mA]
Insert these values in Equation (12.1).
Ig 10 {0.1 00.1 1(0.1 0.1)}
4 [mA]
According to the result of calculation, use a leakage current breaker having the rated sensitivity
current (Ig) of 4[mA] or more. A leakage current breaker having Ig of 15[mA] is used with the NV-
SP/CP/SW/CW/HW series.