LAmp's power supply question

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Hi there,

Three years ago I bought a lamp with the code HPR125 from Philips, in order to use it for making my own prototype boards. The manufacturer's spec says that the lamps power supply is 125V/125W. HEre the public network's voltage is 230Vac. Also a transformer with 125V/125W must be big enough. Is there any other way of easy connection?

Thank you.

Michael.

User of:
IAR Embedded Workbench C/C++ Compiler
Altium Designer

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Diode in series? Likely illegal but who cares :)

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If it is a discharge lamp (like fluorescent), then a diode will NOT do it. Discharge lamps are very sensitive to peak voltage, not RMS.

If you find a 220V primary center-tapped transformer, secondary anything, you can use the center-tap like an auto-transformer and step it down that way. No line isolation, of course, but you would not have any with a normal line connection, anyway.

Jim

 

Until Black Lives Matter, we do not have "All Lives Matter"!

 

 

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Michael.

User of:
IAR Embedded Workbench C/C++ Compiler
Altium Designer

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Google translates from Norwegian as:

Mercury light source with built -
reflector which emits radiation in the area 300 - 400 nm.
Used in the production of offset plates, UV-curing o. etc..

Type HPR 125 W
Watt (W) 125
UV-A-load (C-B-A) (W) 0-0,1-3
Lifetime (hours) 2000
Burn Position Universal
Socket E27
Weight (g) 200
Recommended reactor BHL 125L
Antal pr. packing 4 / 16
EAN-code 8711 500 - 192462
El no --

"mercury" usually implies gas discharge. I believe that the "reactor" referred to means "balast" (common for discharge tubes). I would strongly suggest NOT trying to use a diode to reduce the RMS. And, it looks like you will need a ballast of the recommended type, not just the right voltage. This "reactor" is specified for several of the bulbs.

Jim

 

Until Black Lives Matter, we do not have "All Lives Matter"!