Author Topic: Self ballesting Mercury discharge lamps  (Read 923 times)
riverlights
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Self ballesting Mercury discharge lamps « on: November 04, 2019, 10:59:22 PM » Author: riverlights
How can I know if a lamp is self ballesting from the item specifications on the lamp itself?
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GE101R
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Re: Self ballesting Mercury discharge lamps « Reply #1 on: November 05, 2019, 07:29:31 AM » Author: GE101R
How can I know if a lamp is self ballesting from the item specifications on the lamp itself?

Look the number up online maybe? Many times this will work.
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WestinghouseCeramalux
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Re: Self ballesting Mercury discharge lamps « Reply #2 on: November 11, 2019, 06:32:48 PM » Author: WestinghouseCeramalux
How can I know if a lamp is self ballesting from the item specifications on the lamp itself?
SBMV's always have the voltage given on the etch. For example: 160W/120V; 450W/277V etc. Standard mercury vapor lamps have no voltage given, just an ANSI code number. Why?...because the secondary voltage from the ballast is standardized.
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Mandolin Girl
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Re: Self ballesting Mercury discharge lamps « Reply #3 on: November 28, 2019, 11:23:30 AM » Author: Mandolin Girl
Here is an example of what you need to look for.  Smiley
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GE101R
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Re: Self ballesting Mercury discharge lamps « Reply #4 on: November 28, 2019, 01:18:39 PM » Author: GE101R
Yea, look for the number on the lamp.
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Medved
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Re: Self ballesting Mercury discharge lamps « Reply #5 on: December 01, 2019, 01:34:48 AM » Author: Medved
Unfortunately I've seen regular MV and some fluorescent lamps having "230V" printed on them, yet these were really the standard lamps needing the ballast to operate (well, the "logic" behind probably was the series choke ballast input voltage to be the stated 230V; what is really nonsense for a lamp spec, it is the ballast business to specify its input voltage). So the presence of the "voltage rating" is not 100% reliable indicator of a selfballasted lamp either.
But it happened so far only on very cheepeese products...
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GE101R
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Re: Self ballesting Mercury discharge lamps « Reply #6 on: December 01, 2019, 03:02:09 AM » Author: GE101R
Lamp catalogue number. Totally different on a self ballast.
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WestinghouseCeramalux
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Re: Self ballesting Mercury discharge lamps « Reply #7 on: December 02, 2019, 09:03:44 AM » Author: WestinghouseCeramalux
Unfortunately I've seen regular MV and some fluorescent lamps having "230V" printed on them, yet these were really the standard lamps needing the ballast to operate (well, the "logic" behind probably was the series choke ballast input voltage to be the stated 230V; what is really nonsense for a lamp spec, it is the ballast business to specify its input voltage). So the presence of the "voltage rating" is not 100% reliable indicator of a selfballasted lamp either.
But it happened so far only on very cheepeese products...

Anytime I see the voltage given on a lamp that requires a ballast, I just laugh and put the lamp back on the shelf.  Roll Eyes
« Last Edit: February 12, 2020, 10:34:43 PM by WestinghouseCeramalux » Logged

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migette1
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Re: Self ballesting Mercury discharge lamps « Reply #8 on: February 12, 2020, 02:46:31 PM » Author: migette1
Take a little look, self ballasted lamps will have a filament near the arc tube, if coated try shining a light from torch and try to make the filament out.Just a thought putting a multi meter across the base you should get an ohms reading where as normal it would show as  open circuit, correct me if wrong?
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AngryHorse
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Re: Self ballesting Mercury discharge lamps « Reply #9 on: February 16, 2020, 03:04:22 AM » Author: AngryHorse
Interesting idea Peter, but it would still show an open circuit would it not?, as the filament forms no part of the circuit until the arc had struck an current flow can get back to neutral? Wink
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