So, it is recommended to choose a capacitor with dielectric strength between 200 to 300 V.įor an AC circuit, select a capacitor that has no polarity. As the capacitor suppresses the discharge when the contacts are opened, the resistor arrests the current once the contacts are closed. You can verify the values for R and C by experimenting. As these values rely on many factors including the load properties and deviations in characteristics. You can choose a resistance value of 0.5 to 1 Ω per 1 V of contact voltage. How to Select the Resistor and Capacitor Values Let’ say the load if a motor or a Solenoid, the release time of the relay contacts will be increased. The moment the contacts open, current will flow to the inductive load through the snubber. However, the load impedance has to be lower than the RC circuit impedance when utilizing the relay for supplying the AC voltage. This type applies to both DC and AC circuits. Types of Surge Suppressors: CR type Snubber That said, in an AC circuit, a varistor or RC network happens to be the most effective.
Ideally, a diode snubber is generally preferred for relays controlling DC load, while the second best are the ones that work with resistor and capacitor networks or using RC components.
0 kommentar(er)
