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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
2mm
2
5m
2mm
2
5m
Use a leakage current breaker designed for suppressing harmonics/surges.
Find the terms of Equation (12.1) from the diagram.
Ig1
20
1000
5
0.1
[mA]
Ig2
20
1000
5
0.1
[mA]
Ign
0 (not used)
Iga
0.1 [mA]
Igm
0.1 [mA]
Insert these values in Equation (12.1).
Ig
10 {0.1 0 0.1 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.