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Re: [Development] Lights functions required
- To: ukha_d@xxxxxxx
- Subject: Re: [Development] Lights functions required
- From: "Dr John Tankard" <john@xxxxxxx>
- Date: Tue, 12 Jun 2001 21:44:57 -0000
- Delivered-to: rich@xxxxxxx
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
> I upgraded to 16A triacs but more inportantly used HI-SPEED CERAMIC
fuses.
> The fuses were actually more expensive than the triacs but I NEVER
blew a
> triac after that.
Way to go. since triac's tend to fail closed it is dificult to
explain to a user its the triac, the user just thinks you are talking
c...
Its also a lot easer to swap a expensive fuse than a cheap triac.
>
> The main reason for keeping the rating down is the cost of the
chokes. They
> will cost as much as the Relay+Triac+Opto. The higher the rating
the more
> the choke will cost. Also Isolated tab triacs >16A rating are VERY
> expensive.
>
> Some commercial controllers have the triac legs connected via
cageclamp
> terminal blocks. Self tapper into the heatsink. Triac change is a
two minute
> job involving 4 screws.
I can see in a comercial situation, but i dont think my mother - in -
law could swap a triac.
John
____________________________________
Automated Home UK
http://www.automatedhome.co.uk
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