E6582233
A-17
1
ï‚¢ Disposal
Refer to chapter 15.
1.4.3 What to do about the leakage current
Caution
Mandatory
action
Current may leak through the inverter's input/output wires because of insufficient electrostatic capacity on
the motor with bad effects on peripheral equipment.
The leakage current’s value is affected by the carrier frequency and the length of the input/output wires.
Test and adopt the following remedies against leak current.
(1) Leakage current from the inverter main unit
Some of these inverters are equipped with a ground capacitor compliant with the EMC directive which
gives them a comparatively higher value than a normal inverter. Take this into consideration when
selecting a leakage breaker.
Refer to "Leakage current" (E6581181 (English)) in the separate user manual for details.
(2) Influence of leakage current across ground
Leakage current may flow not just through the inverter system but also through ground wires to other
systems. Leakage current will cause earth leakage breakers, leakage current relays, ground relays, fire
alarms and sensors to operate improperly, and it will cause superimposed noise on the TV screen or
display of incorrect current detection with the CT.
Power
supply
ELCB
Inverter
Inverter
IM
IM
ELCB
Leakage current path across ground
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