Siemens A1 Manual De Usuario
Electromagnetic Compatibility
International English
32
MICROMASTER Applications Handbook
4.
Suppress relay, contactor coils etc. using R-C, flywheel diode, or varistor
suppressers fitted at the coils.
suppressers fitted at the coils.
Diode (DC Coils only) -
Good
Varistor - Better
Resistor/Capacitor -
Best
Figure 6-5
Suppression of Contactor Coils
5.
Use screened or armoured cables for the power connections; ground the screen at
both ends.
both ends.
Filter (Optional)
MICROMASTER
Screened or Armoured Cable - Grounded at both ends
Motor
Figure 6-6
Use of Screened or Armoured Cables
6.
Consider using an RFI filter in the supply to the converter.
7
Consider connecting the 0V of the inverter to the protective earth. This can often
reduce noise in the 0V system.
reduce noise in the 0V system.