---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 11/26/19: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:33 AM - Re: OVM-14 question (Robert L. Nuckolls, III) 2. 12:43 PM - Re: OVM-14 question (Robert L. Nuckolls, III) 3. 07:38 PM - Re: OVM-14 question (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 09:33:16 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Re: OVM-14 question At 01:30 PM 11/25/2019, you wrote: >Sorry to bother you off the list but I couldn't >get logged in. I know you prefer questions to be >posted so everybody can learn. feel free to post >this if you like. Hope you have an great Thanks giving week! Thank you sir. >I'm doing 2 electrical energized field >alternators (small frame 53A), one adjustable >regulator,=C2 one non adjustable regulator, 2 >OVM-14 modules, one battery off the Z13/8 dwg. If you have two, hefty alternators then Z12 is the better option. >I have two 5 amp Klixon circuit breakers for the fields. Okay >My question is about the OVM-14. If both >alternators were in output mode due to low >voltage then one went into over voltage, how do >I get the OVM-14s to only trip the circuit for >the one that is over voltage? It seems like both >field circuits would trip the CB. You don't run both alternators at the same time. Run only the main alternator until you get a low volts warning then turn main alternator OFF, aux alternator ON> >Second question is about eBus. > >I have Circuit breakers for many things. Instead >of a second bus, I was thinking of a momentary >switch connected to the load side of all things >that could be shut off in battery saving mode. >Pressing the switch would trip the breakers for >unnecessary items which could be individually >turned back on if required. would a switch be >adequate or should a 704-1 relay be used to handle the shorting load. I'm curious as to why Z12 is un-attractive as-published? What shortcomings in Z12 beg rectification? Also, aside from crow-bar field breakers, why not fuse blocks? Breakers take up space, add a lot of fabrication/installation labor, don't work any better than a fuse. 99.9% of all breakers installed at the factory go to the scrap yard never having been required to keep a wire from smoking. Why so much investment in a feature that adds nothing to the utility/reliability of your airplane? Bob . . . ________________________________ Message 2 _____________________________________ Time: 12:43:59 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Re: OVM-14 question At 01:30 PM 11/25/2019, you wrote: >Sorry to bother you off the list but I couldn't >get logged in. I know you prefer questions to be >posted so everybody can learn. feel free to post >this if you like. Hope you have an great Thanks giving week! Thank you sir. >I'm doing 2 electrical energized field >alternators (small frame 53A), one adjustable >regulator,=C2 one non adjustable regulator, 2 >OVM-14 modules, one battery off the Z13/8 dwg. If you have two, hefty alternators then Z12 is the better option. >I have two 5 amp Klixon circuit breakers for the fields. Okay >My question is about the OVM-14. If both >alternators were in output mode due to low >voltage then one went into over voltage, how do >I get the OVM-14s to only trip the circuit for >the one that is over voltage? It seems like both >field circuits would trip the CB. You don't run both alternators at the same time. Run only the main alternator until you get a low volts warning then turn main alternator OFF, aux alternator ON> >Second question is about eBus. > >I have Circuit breakers for many things. Instead >of a second bus, I was thinking of a momentary >switch connected to the load side of all things >that could be shut off in battery saving mode. >Pressing the switch would trip the breakers for >unnecessary items which could be individually >turned back on if required. would a switch be >adequate or should a 704-1 relay be used to handle the shorting load. I'm curious as to why Z12 is un-attractive as-published? What shortcomings in Z12 beg rectification? Also, aside from crow-bar field breakers, why not fuse blocks? Breakers take up space, add a lot of fabrication/installation labor, don't work any better than a fuse. 99.9% of all breakers installed at the factory go to the scrap yard never having been required to keep a wire from smoking. Why so much investment in a feature that adds nothing to the utility/reliability of your airplane? Bob . . . ________________________________ Message 3 _____________________________________ Time: 07:38:57 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Re: OVM-14 question At 01:30 PM 11/25/2019, you wrote: >Sorry to bother you off the list but I couldn't >get logged in. I know you prefer questions to be >posted so everybody can learn. feel free to post >this if you like. Hope you have an great Thanks giving week! Thank you sir. >I'm doing 2 electrical energized field >alternators (small frame 53A), one adjustable >regulator,=C2 one non adjustable regulator, 2 >OVM-14 modules, one battery off the Z13/8 dwg. If you have two, hefty alternators then Z12 is the better option. >I have two 5 amp Klixon circuit breakers for the fields. Okay >My question is about the OVM-14. If both >alternators were in output mode due to low >voltage then one went into over voltage, how do >I get the OVM-14s to only trip the circuit for >the one that is over voltage? It seems like both >field circuits would trip the CB. You don't run both alternators at the same time. Run only the main alternator until you get a low volts warning then turn main alternator OFF, aux alternator ON> >Second question is about eBus. > >I have Circuit breakers for many things. Instead >of a second bus, I was thinking of a momentary >switch connected to the load side of all things >that could be shut off in battery saving mode. >Pressing the switch would trip the breakers for >unnecessary items which could be individually >turned back on if required. would a switch be >adequate or should a 704-1 relay be used to handle the shorting load. I'm curious as to why Z12 is un-attractive as-published? What shortcomings in Z12 beg rectification? Also, aside from crow-bar field breakers, why not fuse blocks? Breakers take up space, add a lot of fabrication/installation labor, don't work any better than a fuse. 99.9% of all breakers installed at the factory go to the scrap yard never having been required to keep a wire from smoking. Why so much investment in a feature that adds nothing to the utility/reliability of your airplane? Bob . . . ------------------------------------------------------------------------------------- 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.