Today's Message Index:
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1. 04:32 AM - Re: B-lead relay for IR Alternator (bob noffs)
2. 08:29 AM - Re: B-lead relay for IR Alternator (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: B-lead relay for IR Alternator |
i ordered that relay and just got it installed for my b lead ovm. glad to
hear your report, bob. i was a little worried about the plastic mounting
point breaking so mine is mounted with the mounting point flat down against
a surface.
bob noffs
On Sun, Sep 9, 2018 at 5:04 PM Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 10:07 AM 8/23/2018, you wrote:
>
> At 05:36 AM 8/23/2018, you wrote:
>
> i started wiring my ovm and i have a question about auto relays. the
> contactor i have for the lead off my alternator really bugs me that i am
> adding 14 ounces just for this ''switch''. my alternator is rated at 37
> amps but the 40 and even 50 amp auto relays look like that have a ''fasto
n
> tab'' for their terminal. are these terminals up to carrying the load fro
m
> the alternator?
> =C3=82 bob
>
>
> You might consider this product:
>
> https://goo.gl/UAVJMw
>
> I have no experience with these . . . I'm
> going to order one to peek and poke at . . .
> but the specs are right.
>
> I'd wire the b-lead up with 6AWG welding
> cable.
>
> https://goo.gl/BxAj1V
>
>
> I ordered one of those relays in to look at:
> Here are the 'tear down' photos.
>
> https://tinyurl.com/y7aw646a
>
> This critter seems nicely built. The resting
> current for the coil at 14v is about 0.3 amps
> for an internal dissipation of about 4.5 watts.
> Not seriously pushing it for this size package.
> I think I would mount it with the terminals facing
> down. This would cause any drips or condensate to
> collect on the closeout panel . . . and
> facilitate expulsion during the next
> flight cycle.
>
> At 4.5 watts it's too hot to keep your
> hand on it . . . but battery contactors
> do that too.
>
> Internal 'werks' seem robust enough. The
> stationary and moveable contacts both
> feature precious alloy crowns. I think
> it's worth trying as the b-lead disconnect
> relay in an ov management system on an
> internally regulated alternator.
>
>
> Bob . . .
>
Message 2
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| Subject: | Re: B-lead relay for IR Alternator |
At 06:31 AM 9/11/2018, you wrote:
>i ordered that relay and just got it installed
>for my b lead ovm. glad to hear your report,
>bob. i was a little worried about the plastic
>mounting point breaking so mine is mounted with
>the mounting point flat down against a surface.
>=C2 bob noffs
Yeah . . . I supecdt the housing is glass-filled
nylon . . . pretty robust. But that's also why
I suggested 'soft' fat-wires like welding cable.
Bob . . .
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