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-   -   Circuit Breakers (http://www.diyaudio.com/forums/chip-amps/123694-circuit-breakers.html)

Puffin 25th May 2008 01:12 PM

Circuit Breakers
 
I was wondering if it would be possible to fit some protection to my chip amps.

I was looking at these. If they are suitable, where would you wire them in ? Between Live and tranny ?

http://www.maplin.co.uk/Search.aspx?...uit%20Breakers

http://www.maplin.co.uk/Media/product_pdfs/ak09.PDF

I also have some speaker protection thingys that use a relay, zener diodes and some caps. The only way (when testing) I could get the relay to trip was to apply DC current from the bridge rectifier. Presumably they are to stop DC. Is it worth using these ?

Puffin 26th May 2008 01:36 PM

Re: Circuit Breakers
 
Quote:

Originally posted by Puffin
I was wondering if it would be possible to fit some protection to my chip amps.

I was looking at these. If they are suitable, where would you wire them in ? Between Live and tranny ?

http://www.maplin.co.uk/Search.aspx?...uit%20Breakers

http://www.maplin.co.uk/Media/product_pdfs/ak09.PDF

I also have some speaker protection thingys that use a relay, zener diodes and some caps. The only way (when testing) I could get the relay to trip was to apply DC current from the bridge rectifier. Presumably they are to stop DC. Is it worth using these ?

Anyone ?

Nuuk 26th May 2008 03:09 PM

Puffin, some say that a circuit breaker is better than a fuse and some say not.

I originally used those circuit breakers that also act as a mains switch figuring less connections make for a better sound. I now use fuses and can't honestly say that I can tell the difference between one of the other.

Speaker protection is a personal choice. Slight degradation of sound quality against peace of mind. If you drive speakers directly, ie not through a passive crossover, it could be considered more of a good idea. ;)

Puffin 26th May 2008 04:01 PM

Nuuk. Thanks for that. I tried wiring the Circuit Breaker into the live ac (240v) feed. It didn't seem to do anything. I am not sure what I was expecting it to do to be honest. Where do you think is the best place to wire them in ?

Nuuk 26th May 2008 04:07 PM

They go in place of a mains fuse ie before the mains switch.

Nothing will happen until your amp draws to much current and causes the circuit breaker to trip. In other words, no news is good news! ;)

Puffin 26th May 2008 04:27 PM

Yea, thought so, that's where I had them. Thanks

mikje 31st May 2008 04:15 PM

Puffin,
I used this one. I wired it in series with the incoming AC; between the mains plug and the transformer.

http://www.partsexpress.com/pe/showd...number=074-022


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