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Message from discussion Compact Fluorescent Lamp - switch on current ?
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Franc Zabkar  
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 More options Jul 25, 10:14 am
Newsgroups: sci.electronics.repair
From: Franc Zabkar <fzab...@iinternode.on.net>
Date: Fri, 25 Jul 2008 15:14:48 +1000
Local: Fri, Jul 25 2008 10:14 am
Subject: Re: Compact Fluorescent Lamp - switch on current ?
On Thu, 24 Jul 2008 16:23:51 +0100, "N_Cook" <dive...@tcp.co.uk> put
finger to keyboard and composed:

>15W filament lamp controlled by a tiny reed relay, on for a total of a
>couple of hours a day. Been in use for 20 years or so. Decided to replace
>the working 15 filament one with a 11W CFL but on first switch on, the
>contacts ,presumably only 0.5A rating or so, held on at switch off.

>A slight tap releases them but of course no good with continued CFL use
>unless uprating the relay. Previously stuck contacts occured 10 years or so
>back when the first 15W bulb blew, plasma arc current at failing switch-on
>presumably.

>What is the switch on current of CFLs compared to conventional just out of
>interest ?

Here are several reverse engineered CFL circuits:
 http://www.pavouk.org/hw/lamp/en_index.html

The author writes ...

"During start is peak collector current about 3 to 5 times bigger than
during normal operation."

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.


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