my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Rebuild IREM rectifier (Page 2)

This topic comprises 2 pages: 1  2

Author Topic: Rebuild IREM rectifier Jonathan Wood Expert Film Handler Posts: 206 From: Oxfordshire, United kingdom Registered: Jan 2008 posted 02-13-2014 04:04 AM                     Hi Mark, most European motors are dual voltage 3 phase types , I've just changed one on a Vic 5 that was running off 3x400 to 3/230 via an inverter. The straps are usually in the term box. The D series kinoton machines are dual voltage too but changing them is as you say quite tricky as there is no terminal box as such . I've also done it on a century motor - no straps just a terminal strip but same idea. Seems rectifiers are strictly 230 or 400 though Jon  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 02-13-2014 07:24 AM                        Buck/boost transformers are not too expensive. In this application, you MAY only need two of them. IREM rectifiers, by their design, are not too picky and may well tolerate some variations. Since you are going DOWN in voltage, you may well try it as is and see if you get enough open circuit voltage and are able to adjust to the right range. That has worked for me. (I wonder if the contactor will pull in?) Louis  |  IP: Logged Sigurd Wik Film Handler Posts: 37 From: Bergen, Hordaland, Norway Registered: Feb 2011 posted 02-13-2014 09:22 AM                     Hi Mark, I sent Irem an email a couple of days ago but no reply yet. Yes, I believe the 400V range is the most common in Europe. In Norway both 400V and 230V seems to be equally common, don't really know why. Hi Louis, Thanks, never thought of that. Will check tomorrow.  |  IP: Logged Jonathan Wood Expert Film Handler Posts: 206 From: Oxfordshire, United kingdom Registered: Jan 2008 posted 02-13-2014 11:15 AM                     As I'm interested in doing the same thing I emailed them yesterday and here's the reply I received from irem this morning , looks like it's a no go unless you try the transformer ? Dear Mr.Wood, I'm sorry but a three phase rectifier 400V version can't works with a three phase mains voltage of 230V and it is not possible to make a single phase rectifier. In case you are interested for a three phase 220V rectifier we can send you a quotation for the model N3-50E 220V50/60HZ (xenon lamp range 700W-1000W). Awaiting to receive your kind reply, Best regards Roberto BRANDO Professional Lighting Product Manager IREM SpA – a socio unico Via Abegg 75 10050 Borgone di Susa (TO) - ITALY Tel. +39 011 9648211 Fax +39 011 9648222  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-13-2014 12:02 PM                     The FP-56 motor although has the windings internally seperable it doesn't come from the factory with accessable taps. ONe has to rewire the internal windings. But it works out fine and runs well off a solid state motor controller. 230 volt three phase is not quite as lethal as 400 volt 3 phase would be. I've gotten bit by 230 volts once or twice over the years. Getting bit by 400 volts would certainly mean death. Mark  |  IP: Logged Sigurd Wik Film Handler Posts: 37 From: Bergen, Hordaland, Norway Registered: Feb 2011 posted 02-17-2014 06:04 PM                     Hi Jonathan, Thanks a bunch for info, seems like you have a hotline to Irem that is missed by me Think I will be looking for a couple of other rectifiers then.  |  IP: Logged Marin Zorica Jedi Master Film Handler Posts: 671 From: Biograd na Moru, Croatia Registered: May 2003 posted 02-20-2014 04:12 PM                     Hmm....what exact voltages you have? this rectifiers, smps to be more precise as i see are made for three phase 400V mains, so there is 400V between each phase.....and what are you have at you're cinema, single phase 230V or 230V between each phase, because I assume you have single phase? Even, they told is not possible, i think there is a bit possibility to do it, since when you rectify 400V of three phase current you got around 500V DC and other is done by IGBT switching, you could try to rewire input rectifier bridge circuit to work like 230V grectifier in doubler way, so that would get you around 550V....but to do that you need to have a good knowledge of rectifier circuits and electronics. I remember few years ago i bought couple ORC recitifier, which were irem just branded orc. They all were for 110V ac and 1000W xenon, even irem told me it can't be made to work on 230V european main i did it and rewire a few of them.... i did that because it was cheaper to buy them in USA and ship here along with my rebuilding, than to buy new at irem.  |  IP: Logged Oscar Naveiras Calvo Film Handler Posts: 1 From: Lalin, Pontevedra, Spain Registered: Jun 2014 posted 06-19-2014 03:20 AM                     Hi: I supposed it to late for the answer ... but we have a similar problem, with one difference. The difference is ... we are in Spain (Europe) and we have a couple of Irem EX-1500/3 but for US power supplies, 3 phases 208v. We tried to solve the problem, but nothing works ... So, maybe you will be interested in a change ...  |  IP: Logged

All times are Central (GMT -6:00)

This topic comprises 2 pages: 1  2

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.