| ??? 10/25/07 21:37 Read: times |
#146227 - Surges Responding to: ???'s previous message |
Erik Malund said:
Would a properly designed SCR circuit to replace the relay fix this problem?
there are oodles and bunches of zero crossing switch modules out there, I doubt you can do better (technically or economically) than buying one. Be mindful of the startup inrush current, and the highly inductive load will be a bitch to commutate properly - put a decent RC snubber (Try 100 Ohm resistor and a 100nF Polyester cap 400V rated)across the switch on your relay and see what happens. Steve |
| Topic | Author | Date |
| AC Motor Start/Run Cap Sizing | 01/01/70 00:00 | |
| More details required | 01/01/70 00:00 | |
| heres what i know | 01/01/70 00:00 | |
| Three wires .. | 01/01/70 00:00 | |
| thank you | 01/01/70 00:00 | |
| I'll bet you 10 to 1 it is relay arching | 01/01/70 00:00 | |
| how would i fix that? | 01/01/70 00:00 | |
| zero crossing switch | 01/01/70 00:00 | |
Surges | 01/01/70 00:00 | |
| Motor type | 01/01/70 00:00 | |
| Capacitor on mains wires | 01/01/70 00:00 | |
| Parallel ? | 01/01/70 00:00 | |
| decent supply? | 01/01/70 00:00 | |
| As I said... | 01/01/70 00:00 | |
| DISASTER!!! | 01/01/70 00:00 | |
| Interesting timing | 01/01/70 00:00 |