Relay for soft start
I know this simple question might have been covered, but I just can't find a simple answer.
I am building a 5 channel UCD180 amp with total 100000uF and a 1000VA toroidal
Q1: What size of the relay should I go for in the soft start (when the soft start is bypassed by the relay, how much current does it have to be able to draw)?
Q2: What fuse size should I go for?
1000 VA/ 216V should give you 4.63 amp. I chose 216 volt because that would be 240V - 10%
But always keep a safety margin...go for a 10 amp relay.
For fuses, check the devices I2t curves, see a particular example:
Thanks for great and quick answer!
That was all I wanted to know... until now...
If I have a DPDT relay being able to handle 5A, can I use both of the poles in parallell to get 10A (can a 5A DPDT relay handle 5A per pole)?
Generally no. Contacts don't share current very well. One opens or closes first. But you could try it if you have one. If you're buying, go for 10A.
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