Orientalmotor FE100 Operating Manual page 13

Countermeasure against harmonic leak current
Stray capacitance exists between the inverter's power lines and other power lines,
the ground or the connected motor. Harmonic leak current may flow from the
inverter to the motor or peripherals through this stray capacitance, giving unwanted
effects to the motor/peripherals. Since leak current is determined by the wiring
distance between the inverter and motor and also by the inverter's carrier frequency,
provide the following measures to minimize leak current.
• Use an earth-leakage breaker incorporating harmonic elimination measures (refer
to "Recommended peripherals" on p.58).
• Set the carrier frequency to 10 kHz using the carrier-frequency selector switch
provided on the rear of the inverter.
• Connect a zero-phase reactor (p.58).
A zero-phase reactor can be connected to either the output or input side of the
inverter. It also has the effect of reducing noise.
Zero-phase reactor
R
Power S
supply
T
Wrap R/S/T and U/V/W lines around cores three times each.
FE inverter
Zero-phase reactor
L1 U
L2 V
L3 W
3 Precautions for use
M
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