Mitsubishi Electronics MR-J3- B, MR-J3-B - page 289

11 - 84
11. OPTIONS AND AUXILIARY EQUIPMENT
Table 11.4 Servo motor's leakage current example (Igm) Table 11.5 Servo amplifier's leakage current example (Iga)
Servo motor power
[kW]
Leakage current
[mA] Servo amplifier capacity [kW]
Leakage current
[mA]
0.05 to 1 0.1 0.1 to 0.6 0.1
2 0.2
0.75 to 3.5 (Note) 0.15
3.5 0.3
57 2
5 0.5
11 15 5.5
7 0.7
22 7
11 1.0
15 1.3
Note. For the 3.5kW of 400V class, leakage current is 2mA,
which is the same as for 5kW and 7kW.
22 2.3
Table 11.6 Leakage circuit breaker selection example
Servo amplifier Rated sensitivity current of leak age
circuit breaker [mA]
MR-J3-10B to MR-J3-350B
MR-J3-10B1 to MR-J3-40B1
MR-J3-60B4 to MR-J3-350B4
15
MR-J3-500B(4) 30
MR-J3-700B(4) 50
MR-J3-11KB(4) to MR-J3-22KB(4) 100
(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-J3-40B
2mm2 5m 2mm2 5m
Servo motor
HF-KP43
Use a leakage current breaker generally available.
Find the terms of Equation (11.1) from the diagr am.
Ig1 20 1000
50.1 [mA]
Ig2 20 1000
50.1 [mA]
Ign 0 (not used)
Iga 0.1 [mA]
Igm 0.1 [mA]
Insert these values in Equation (11.1).
Ig 10 {0.1 00.1 1(0.1 0.1)}
4.0 [mA]
According to the result of calculation, use a leakage current breaker having the rated sensitivity curr ent (Ig)
of 4.0[mA] or more. A leakage current breaker ha ving Ig of 15[mA] is used with the NV-SP/SW/CP/CW/HW
series.