Mitsubishi Electric MELSERVO-JN Series Instruction Manual page 298

11. OPTIONS AND PERIPHERAL EQUIPMENT
(2) Selection example
Indicated below is an example of selecting an earth-leakage current breaker under the following conditions.
2mm 5m
2
NV
Ig1
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
4.0 [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. An earth-leakage current breaker having Ig of 15[mA] is used with the NV-
SP/SW/CP/CW/HW series.
Table 11.4 Servo motor's leakage current example (Igm)
Servo motor power [kW]
Table 11.5 Servo amplifier's leakage current example (Iga)
Servo amplifier capacity [kW]
Table 11.6 Earth-leakage current breaker selection example
MR-JN-10A(1)/20A(1)/40A
2mm 5m
2
Servo amplifier
M
MR-JN-40A
Iga Ig2 Igm
(0.1 0.1)}
0.05 to 0.4
0.1 to 0.4
Rated sensitivity current of the earth-
Servo amplifier
Servo motor
HF-KN43
11 - 41
Leakage current [mA]
0.1
Leakage current [mA]
0.1
leakage current breaker [mA]
15