Mitsubishi Electric MELSERVO-J3 Series Instruction Manual page 502

14. OPTIONS AND AUXILIARY EQUIPMENT
Table 14.4 Servo motor's leakage current example (Igm)
Servo motor output [kW]
0.05 to 1
2
3.5
5
7
11
15
22
(2) Selection example
Indicated below is an example of selecting an earth-leakage current breaker under the following conditions.
2mm × 5m
2
NV
Servo amplifier
Ig1
Use an earth-leakage current breaker generally available.
Find the terms of Equation (14.1) 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 (14.1).
Ig 10 {0.1 0 0.1 1 (0.1 0.1)}
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.
Leakage current [mA]
0.1
0.2
0.3
0.5
0.7
1.0
1.3
2.3
2mm × 5m
2
Servo motor
M
HF-KP43
0.4kW
Iga Ig2 Igm
Table 14.5 Servo amplifier's leakage current example (Iga)
Servo amplifier capacity [kW]
0.1 to 0.6
0.75 to 3.5 (Note)
5 7
11 15
22
Note. For the 3.5kW of 400V class, leakage current is 2mA,
which is the same as for 5kW and 7kW.
Table 14.6 Earth-leakage circuit breaker selection example
Servo amplifier
MR-J3-10T to MR-J3-350T
MR-J3-10T1 to MR-J3-40T1
MR-J3-60T4 to MR-J3-350T4
MR-J3-500T(4)
MR-J3-700T(4)
MR-J3-11KT(4) to MR-J3-22KT(4)
14 - 93
Leakage current [mA]
0.1
0.15
2
5.5
7
Rated sensitivity current of earth-
leakage circuit breaker [mA]
15
30
50
100