Selection Example - Mitsubishi Electric Melservo-Jet MR-JET Series User Manual

Selection example

This section shows examples of selecting an earth-leakage current breaker under the following conditions.
2
2 mm × 5 m
NV
Ig1
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.
6 OPTIONS AND PERIPHERAL EQUIPMENT
82
6.10 Earth-leakage current breaker
2
2 mm × 5 m
Servo amplifier
M
MR-JET-40G
Iga Ig2 Igm
Servo motor
HK-KT43