posted 04-21-2002 06:47 PM                       

It is an EPRAD 47702 RECTIFIER. It is a model 3-phase, stating 414VAC input. It has a large 3-gang variable resistor, with the knob on the top at the right hand side, when viewed from the front. (I am in Australia with 240V power ... how does it arrive at 414 input?) The only other controls are a couple of fault reset button on the front panel. On the 3-phase input, it runs the 3 actives & an earth, but no neutral. (?) Also Gordon, is there a document you might suggest that fully explains the operation and theory of xenon lamps and there power supplies? Thanks again.

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posted 04-22-2002 04:47 AM                       

Matt
What is your problem? I have had some experience with this type of rectifier, 3 phase power here is around 415 volts between phases 240 from any phase to the nuetral.
The last one I worked on I had to replace the auto transformer,
I found one from a local supplier.
You can call me in Melb on 03 59683992 and I can assist you in real time with any questions you may want to ask.

ps.
I have a circuit for it also,

Regards.

------------------
KALEE FOREVER. CARBON ARC, THE ONLY LIGHT FOR THE STARS!
ALL PARTS FOR VICTOR AND KALART VICTOR 16MM PROJECTORS.SERVICE TO 35 AND 16MM PROJECTION EQUIPMENT.
35MM sprockets made to order.

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posted 04-22-2002 04:59 PM                       

Yes thats what I took out Gordon, but there were no spares down here, so the replacement off the shelf unit was fitted,this was some 18 months ago and is still performing A1.
Stan

------------------
KALEE FOREVER. CARBON ARC, THE ONLY LIGHT FOR THE STARS!
ALL PARTS FOR VICTOR AND KALART VICTOR 16MM PROJECTORS.SERVICE TO 35 AND 16MM PROJECTION EQUIPMENT.
35MM sprockets made to order.

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posted 04-23-2002 08:26 PM                       

Gordon or Stan ...... or anyone who can help .....

I have tested the outputs of the three-gang auto-transformer , and I get between 200 - 300 volts out of each onem measured between terminals 2(neutral) and 3(active).

Out of the the three-phase transformer, I get 20-30V from each one, and with the small boost supply wires dis-connected from the main DC output, I get around 80V un-loaded. Testing the boost supply output separately reads around 90V at switch-on, then ramps up to 180V and stays there. Someone has replaced the original relay/reed switch combo with just a resistor at some stage .... how does this work? Also, The lamp-house igniter seems to function fine .....

What I have on the indicators on the rectifier is a yellow fault light, marked IGNITER OR XENON LAMP...... BUT, I ran this lamphouse this morning on one of our IREM rectifiers, and it fired up fine ..... so, any ideas????? ***cries for help***

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