Mitsubishi Electric MELSERVO-J3W Series, Instruction Manual

Page: 236 / 500

11. OPTIONS AND AUXILIARY EQUIPMENT
11 - 51
(2) Selection example
Indicated below is an example of selecting an earth-leakage current breaker under the following conditions.
2mm
2
5m
MCCB
Ig1 Iga
Servo amplifier
MR-J3W-44B
Cable
Ig2 Igm
M
Cable
Ig2 Igm
M
A-aixs servo motor
HF-KP43
B-aixs servo motor
HF-KP43
2mm
2
5m
Use an earth-leakage current breaker generally available.
Find the terms of Equation (11.1) from the diagram.
Ig1 20
1000
5
0.1 [mA]
Ig2 20
1000
5
0.1 [mA]
Ign 0 (not used)
Iga 0.1 [mA]
Igm 0.1 [mA]
Insert these values in Equation (11.1).
Ig 10 {0.1 0 0.1 1 (0.1 0.1 0.1 0.1)}
6.0 [mA]
According to the result of calculation, use an earth-leakage current breaker having the rated sensitivity
current (Ig) of 6.0 [mA] or more. An earth-leakage current breaker having Ig of 15 [mA] is used with the NV-
SP/SW/CP/CW/HW series.