Mitsubishi Electric Melservo MR-J3-A Instruction Manual page 348

12. OPTIONS AND AUXILIARY EQUIPMENT
Table 12.4 Servo motor's leakage current example (Igm)
Servo motor power
[kW]
0.05 to 1
2
3.5
5
7
11
15
22
(2) Selection example
Indicated below is an example of selecting a leakage current breaker under the following conditions:
2mm 5m
2
NV
Ig1
Use a leakage current breaker generally available.
Find the terms of Equation (12.2) 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 (12.2):
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.
Leakage current
[mA]
0.1
0.2
0.3
0.5
0.7
1.0
1.3
2.3
2mm 5m
2
Servo
M
amplifier
MR-J3-40A
Iga Ig2 Igm
Table 12.5 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 12.6 Leakage circuit breaker selection example
Servo amplifier
MR-J3-10A to MR-J3-350A
MR-J3-10A1 to MR-J3-40A1
MR-J3-500A(4)
MR-J3-700A(4)
MR-J3-11KA(4) to MR-J3-22KA(4)
Servo motor
HF-KP43
12 - 75
Leakage current
[mA]
0.1
0.15
2
5.5
7
Rated sensitivity current of leakage
circuit breaker [mA]
15
30
50
100