- Dead Electrical - 7 Updates
- lovato contactor - 4 Updates
- Lovato DPMC9 Contactor - 1 Update
| "Ian Field" <gangprobing.alien@ntlworld.com>: Apr 06 10:19PM +0100 "Ralph Mowery" <rmowery28146@earthlink.net> wrote in message news:srSdnVvl29Pa6pnKnZ2dnUU7-anNnZ2d@earthlink.com... >>> sounds like to me. >> So when is grease on the terminals bad ?? > When it gets between the battery post and the clamp. Most user/workshop manuals I've seen, advise a smear of petroleum jelly on the battery posts to prevent a buildup of corrosion under the clamps. Over the years, I've had various vehicles that seemed incapable of containing their engine oil - once or twice the battery also got drenched, apparently without any adverse effects. |
| "Ian Field" <gangprobing.alien@ntlworld.com>: Apr 06 10:25PM +0100 "Snuffy "Hub Cap" McKinney" <Snuffy-Hub-Cap@Livebait-McKinney.com> wrote in message news:S7GdnZ9Ef_o5bp7KnZ2dnUU7-WvNnZ2d@earthlink.com... > show them but do not tell where to look for them. I assume close to the > battery -- will spend some time now looking and TS with a meter. > Any other suggestions? Thanks in advance. Sounds like corrosion wherever the big earth cable from the battery gets bolted to the chassis. All the fuses are low current circuits (compared to the starter motor). A common location for the fuse panel was on the bulkhead behind the engine - nowadays more likely to be somewhere in or around the glove compartment. Sometimes behind a removable panel beside the driver's footwell. |
| Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Apr 06 07:43PM -0400 On 04/06/2016 08:42 AM, Tim R wrote: >> If it is on the outside it is fine. > Conventional wisdom says when you tighten it down the grease gets squeezed out and there is direct metal to metal contact. > Whether that's based on data or not I don't know. But that's the way mechanics do it successfully. Of course air is a better insulator than grease. ;) The actual metal-to-metal contact area is surprisingly small--it's roughly equal to the total preload divided by the yield strength of the weaker material. As long as the grease can get out of the way of the high spots that actually do the conducting, it won't hurt the conductance. What it will do is keep acid out of the joint, which is a win. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net |
| Cursitor Doom <curd@notformail.com>: Apr 07 09:43AM On Tue, 05 Apr 2016 17:51:18 -0500, amdx wrote: > a battery/starter circuit and the starter tries to draw 200 amps, there > is 12 volts dropped across your battery connection.* > You won't be able to measure 0.06 ohms. At 200A, even one miliohm of connection resistance is going to waste 40W of battery power. |
| "Snuffy \"Hub Cap\" McKinney" <Snuffy-Hub-Cap@Livebait-McKinney.com>: Apr 07 09:17AM -0700 On Tue, 05 Apr 2016 17:51:18 -0500, amdx wrote: > a battery/starter circuit and the starter tries to draw 200 amps, there > is 12 volts dropped across your battery connection.* > You won't be able to measure 0.06 ohms. Before and after cleaning all the connections in the starting circuit the voltage drop during starting is about the same - less than 3V. |
| "Snuffy \"Hub Cap\" McKinney" <Snuffy-Hub-Cap@Livebait-McKinney.com>: Apr 07 09:22AM -0700 "Snuffy "Hub Cap" McKinney" <Snuffy-Hub-Cap@Livebait-McKinney.com> wrote in message news:3KCdnSZgK6giGpvKnZ2dnUU7-N3NnZ2d@earthlink.com... On Tue, 05 Apr 2016 17:51:18 -0500, amdx wrote: > a battery/starter circuit and the starter tries to draw 200 amps, there > is 12 volts dropped across your battery connection.* > You won't be able to measure 0.06 ohms. Before and after cleaning all the connections in the starting circuit the voltage drop during starting is about the same - less than 3V. I meant to add that all the connections were tight but several had various levels of corrosion. After cleaning the overall resistance from pos or neg battery post to starter or block block went from around 1.9 to 1.4 ohms. That's not enough to prevent starting, but I suspect that one of the connections was intermittent. |
| "Snuffy \"Hub Cap\" McKinney" <Snuffy-Hub-Cap@Livebait-McKinney.com>: Apr 07 09:37AM -0700 "Phil Hobbs" <pcdhSpamMeSenseless@electrooptical.net> wrote in message news:uIOdnd1oj4-SApjKnZ2dnUU7-UednZ2d@supernews.com... > high spots that actually do the conducting, it won't hurt the conductance. > What it will do is keep acid out of the joint, which is a win. > Cheers If there any chance of liquid getting in a connection and the leak can't be prevented, I would move the connection, or solder and shrink wrap it. I'm not a big fan of greasing electrical connections. |
| Peter Easthope <petereasthope@gmail.com>: Apr 06 04:58PM -0700 On Wednesday, April 24, 1996 at 12:00:00 AM UTC-7, Tim Warner wrote: > Relay/Contactor? > Thanks... > ---Tim eBay. If nothing appropriate is current, save a search. ... Peter E. |
| Geo <nhhu-o3hu@dea.spamcon.org>: Apr 07 02:17PM +0100 On Wed, 6 Apr 2016 16:58:02 -0700 (PDT), Peter Easthope >> ---Tim >eBay. If nothing appropriate is current, save a search. > ... Peter E. Current?? Ho ho ho... 2016-1996=10 |
| Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Apr 07 09:53AM -0400 On 04/07/2016 09:17 AM, Geo wrote: >> eBay. If nothing appropriate is current, save a search. >> ... Peter E. > Current?? Ho ho ho... 2016-1996=10 Well, in base 20 arithmetic ;) Of course then the original post would be from the year 11786 AD. Devilish up-to-date, to be sure. Cheers Phil Hobbs |
| Geo <nhhu-o3hu@dea.spamcon.org>: Apr 07 03:31PM +0100 On Thu, 7 Apr 2016 09:53:29 -0400, Phil Hobbs >Well, in base 20 arithmetic ;) I use my toes too... |
| Peter Easthope <petereasthope@gmail.com>: Apr 06 05:05PM -0700 Hi, I want to test a Lovato DPMC9 connected to a motor here. Is anyone familiar with this device? Anyone have a catalog? What voltage should activate the coil? AC or DC? Thanks, ... Peter E. |
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