---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 12/10/14: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:04 AM - Re: regulator-rectifier questions (user9253) 2. 07:10 AM - Re: Bad overvoltage module? (user9253) 3. 07:22 AM - Re: Bad overvoltage module? (user9253) 4. 08:09 AM - Re: Bad overvoltage module? (Charles Brame) 5. 08:48 AM - Re: Re: regulator-rectifier questions (Ken Ryan) 6. 11:10 AM - Re: Bad overvoltage module? (user9253) ________________________________ Message 1 _____________________________________ Time: 07:04:25 AM PST US Subject: AeroElectric-List: Re: regulator-rectifier questions From: "user9253" Yes, you have correctly identified the function of C, L and B+ The R terminal is connected to the B+ terminal. Why, I do not know, either for increased ampacity or redundancy. According to a schematic of the regulator that I have seen, terminals R and B+ are also connected together inside of the regulator. On page 18-3 of this document, http://www.vansaircraft.com/pdf/revisions/RV-12/User_Manuals/MM.pdf is a wiring diagram of the regulator in Van's RV-12. The warning light is not needed if an EFIS indicates a low voltage condition. The regulator should be mounted in a cool location. It is notoriously prone to failure from overheating. Heat conductive grease should be applied to the mounting base. Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=435556#435556 ________________________________ Message 2 _____________________________________ Time: 07:10:58 AM PST US Subject: AeroElectric-List: Re: Bad overvoltage module? From: "user9253" I agree with others that not having over-voltage protection is a bad idea. High voltage can damage expensive avionics in much less time than a human can react to shut it off. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=435558#435558 ________________________________ Message 3 _____________________________________ Time: 07:22:22 AM PST US Subject: AeroElectric-List: Re: Bad overvoltage module? From: "user9253" > when I turned on the backup PM alternator with engine off, my 5 amp circuit breaker instantly tripped. With the over-voltage module removed from the circuit, does the relay energize (click) when the aux alt switch is turned on? And does the circuit breaker not trip? If both true, then the fault must be the O.V. module. Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=435559#435559 ________________________________ Message 4 _____________________________________ Time: 08:09:28 AM PST US From: Charles Brame Subject: Re: AeroElectric-List: Bad overvoltage module? I noted the recommendation that the OVM be checked annually. I have not done that in the nearly eight years my RV has been flying. Nor has the OVM ever shut down the alternator. Nor have I had any voltage surge that damaged anything. Just lucky? What is the best (easiest) method to check the OVM operation? Charlie Brame RV-6A N11CB San Antonio ________________________________ Message 5 _____________________________________ Time: 08:48:19 AM PST US From: Ken Ryan Subject: Re: AeroElectric-List: Re: regulator-rectifier questions Thanks Joe. On Wed, Dec 10, 2014 at 6:03 AM, user9253 wrote: > > Yes, you have correctly identified the function of C, L and B+ > The R terminal is connected to the B+ terminal. Why, I do not know, > either for increased ampacity or redundancy. According to a schematic of > the regulator that I have seen, terminals R and B+ are also connected > together inside of the regulator. > On page 18-3 of this document, > http://www.vansaircraft.com/pdf/revisions/RV-12/User_Manuals/MM.pdf > is a wiring diagram of the regulator in Van's RV-12. > The warning light is not needed if an EFIS indicates a low voltage > condition. > The regulator should be mounted in a cool location. It is notoriously > prone to failure from overheating. Heat conductive grease should be > applied to the mounting base. > Joe > > -------- > Joe Gores > > ________________________________ Message 6 _____________________________________ Time: 11:10:42 AM PST US Subject: AeroElectric-List: Re: Bad overvoltage module? From: "user9253" > What is the best (easiest) method to check the OVM operation? Page 1 of his document http://www.aeroelectric.com/DIY/DIY_Crowbar_OVP_F.pdf shows how to test an over-voltage module. The best way is on a workbench using an adjustable DC power supply. The easy way is in the aircraft using alligator clips and a battery. Bob says to use a 6 volt lantern battery, but 4 D cells in series might work too. Notice that the negative alligator clip is attached to the aircraft power bus. I recommend that all avionics and any polarity sensitive devices be shut off prior to doing this test. Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=435567#435567 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.