Earth-Leakage Current Breaker; Selection Method - Mitsubishi Electric MELSERVO-J5 User Manual

Ac servo system

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Earth-leakage current breaker

High-frequency chopper currents controlled by pulse width modulation flow in the AC servo circuits. Leakage currents

containing harmonic contents are larger than those of the motor, which runs on AC power.

Select an earth-leakage current breaker according to the following formula, and ground the servo amplifier, servo motor, etc.

To minimize leakage currents, make the input and output wires as short as possible, and keep a distance of 30 cm or longer

between the wires and ground.

MR-J5-_G_ or MR-J5-_A_

Rated sensitivity current ≥ 10 • {Ig1 + Ign + Iga + K • (Ig2 + Igm)} [mA] . . . (6.1)

Noise filter

6 OPTIONS AND PERIPHERAL EQUIPMENT

6.15 Earth-leakage current breaker