Selection Example - Mitsubishi Electric MELSERVO-J5 User Manual
Ac servo system
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Also See for MELSERVO-J5:
- User manual (580 pages) ,
- Sample screen manual (128 pages) ,
- Introduction manual (112 pages)
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■Earth-leakage current breaker selection example
Servo amplifier
MR-J5-10_ to MR-J5-350_
MR-J5-500_
MR-J5-700_
MR-J5W2-_G_
MR-J5W3-_G_
MR-J5-60_4_ to MR-J5-350_4_
Selection example
This section shows examples of selecting an earth-leakage current breaker under the following conditions.
MR-J5-_G_ or MR-J5-_A_
2
2 mm
× 5 m
NV
Servo amplifier
MR-J5-40G
Ig1
Iga
Use an earth-leakage current breaker designed for suppressing harmonics/surges.
Find each term of formula (6.1) 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 formula (6.1).
Ig ≥ 10 • {0.1 + 0 + 0.1 + 1 • (0.1 + 0.1)}
Ig ≥ 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.
Use an earth-leakage current breaker having Ig of 15 mA for the NV-SP/SW/CP/CW/HW series.
2
2 mm
× 5 m
Servo motor
M
HK-KT43
Ig2
Igm
Rated sensitivity current of earth-leakage current breaker [mA]
15
30
50
15
30
15
6 OPTIONS AND PERIPHERAL EQUIPMENT
6.15 Earth-leakage current breaker
6
251
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