Mitsubishi MR-JE-10B Instruction Manual page 257

11. OPTIONS AND PERIPHERAL EQUIPMENT
(2) Selection example
Indicated below is an example of selecting an earth-leakage current breaker under the following
conditions.
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 • (0.1 + 0.1)}
≥ 4 [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 11.2 Servo motor leakage current example (lgm)
Servo motor power [kW]
0.1 to 1
1.5 to 2
3
Table 11.3 Servo amplifier leakage current example (Iga)
Servo amplifier capacity [kW]
0.1 to 0.4
0.75 to 3
Table 11.4 Earth-leakage current breaker selection example
Servo amplifier capacity [kW]
MR-JE-10B to MR-JE-300B
2 mm 2 × 5 m
NV
Servo amplifier
MR-JE-40B
Ig1
11 - 44
Leakage current [mA]
0.1
0.2
0.3
Leakage current [mA]
0.1
0.15
Rated sensitivity current of earth-
leakage current breaker [mA]
15
2 mm 2 × 5 m
Servo motor
M
Iga Ig2 Igm
HG-KN43