Leak Current And Countermeasure; Installation Demand For Electromagnetic On-Off Electronic Device - toscano TDS600 Serie Manual De Usuario

4.3. Leak current and countermeasure
The leak current fl ows through inverter input and output terminal for wire capacitance
and motor capacitance, and its size decided by the distributed capacitance and carrier
frequency. There are two kinds of leak current: leak current to earth and wire-to-wire.
Restraining methods as below:
01. Diminish the cable length between inverter and motor.
02. Install ferrite magnetic ring or output reactor at the inverter output
terminal.
When reactor installed with rated voltage drop more 5% and long wiring
to U, V, W terminal, it would reduce motor's voltage apparently. When
motor run at full load, it is possible to fl ash motor, and it should be used
by derating or boosting input and output voltage.
03. As carrier frequency low, the motor noise would increase accordingly.
4.4. Installation demand for electromagnetic on-off electronic device
It should pay attention that surge absorber must be installed when
electromagnetic on-off electronic device like relay, electromagnetic contactor
and electromagnetic iron generating noise easily and largely installed near to
inverter or in the same control cabinet, show as Fig. 4-3
4. EMC (Electromagnetic Compatibility)Explanation
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