Toshiba TOSVERT VF-nC3 Instruction Manual page 28

Industrial inverter for 3-phase induction motors
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Disposal
See chapter 16.
1.4.3
1
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
(2) Effects of leak current across ground
Power
supply
What to do about the leakage current
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.
For details, see "Leakage current" (E6580977) in the separate user manual.
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.
ELCB
ELCB
Leakage current path across ground
Caution
Inverter
Inverter
A-16
E6581595
IM
IM

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