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13. OPTIONS AND AUXILIARY EQUIPMENT
(2) Selection example
Indicated below is an example of selecting a leakage current breaker under the following conditions:
M
NV
Ig1 Iga Ig2 Igm
Servo
amplifier
MR-J2S-60A
2mm
2
5m 2mm
2
5m
Servo motor
HC-MFS73
Use a leakage current breaker generally available.
Find the terms of Equation (13.2) 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 (13.2):
Ig
10 {0.1 0 0.1 1 (0.1 0.1)}
4.0 [mA]
According to the result of calculation, use a leakage current breaker having the rated sensitivity
current (Ig) of 4.0[mA] or more. A leakage current breaker having Ig of 15[mA] is used with the NV-
SP/SW/CP/CW/HW series.