Protective Circuits for AC Actuators
Original instructions
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Overview
To reduce noise potentials and for EMC considerations you may need to equip the inductive actuators with noise suppressors, e.g., anti-interference capacitors, at the point of interference.
Protective Circuit Types
The following table provides generic selection guidelines.
Type of Load
Suppression Device
Minimum Component Rating
AC circuits
50 Ω resistor in series with a 0.47 μfd nonpolarized capacitor across the load
for 120 VAC-powered loads
200 VAC
for 220 VAC-powered loads
400 VAC
Consult relay and contactor manufacturers’ catalogs for commercial suppression devices matched to your particular products.
Example
An example of a protective circuit for inductive AC actuators is illustrated below: