Sujet : Re: Philips TL-S bulbs
De : liz (at) *nospam* poppyrecords.invalid.invalid (Liz Tuddenham)
Groupes : sci.electronics.designDate : 10. Apr 2024, 09:44:52
Autres entêtes
Organisation : Poppy Records
Message-ID : <1qrsilx.5w68h73o0kh2N%liz@poppyrecords.invalid.invalid>
References : 1
User-Agent : MacSOUP/2.4.6
Mike Mocha <
mocha@mailexcite.com> wrote:
Hey all,
I have an old rail car design that used ballast-free florescent tubes in a
600 VDC circuit; bulbs used in series with power resistors, the circuit
basically put 100 VDC or 60 VDC over each bulb. There's no AC source on
the car.
I think those tubes needed special switches to reverse the polarity each
time they were switched on. This was to prevent darkening of one end of
the tube after a few hours, caused by migration of the mercury. You may
have to replace the switchgear if you fit inverter-powered lamps.
If you contact a tramcar manufacturer, they should be able to put you in
touch with some companies that supply modern lighting equipment for 600
VDC.
-- ~ Liz Tuddenham ~(Remove the ".invalid"s and add ".co.uk" to reply)www.poppyrecords.co.uk