Please set aside on cost and complexity matter in this discussion, as this is probably just for one off personal project.
With topic Relay vs SSR, each as it's own pro & con, and I was thinking why not combine both.
Circuit concept attached below.
The objectives are :
1. Significantly increase the relay's contacts life, as the most tear & wear was happened during serving high current when the contacts close, and also when opened as it was arc-ing, reference ->
Contact protection2. No leakage current during off state exactly like relay does, as even the best SSR still have it.
The idea is, when turning on, energize the relay 1st, delay abit, and then turn on/close the mosfets switch, and also when turning off, open the Mosfets 1st, add delay and then power off the the relay to release the contacts.
Questions :
- Will this work ?
- If it works as I'm expecting, will it work at both either in AC or DC ?
- Appreciate any other insight/critics/after thought and etc.
TIA
Edit :
Typo in the illustration, Phovoltaic .. should be PhotoVoltaic.