nuckollsr(at)cox.net
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 Posted: Mon Aug 06, 2007 8:35 am Post subject: Intermittent vs. Continuous Duty Contactors (was batteries |
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At 09:32 AM 8/6/2007 -0600, you wrote:
| Quote: | Greg or Bob , I know that there is an electrical way of telling the two
apart in the Connection, but do you know if there is a way to tell them
apart visually? All mine as they came with the firewall from Lancair seem
to look alike, even to the stenciled numbers on them?
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No. Put an ohmmeter on them. A continuous duty contactor
will NEVER measure under 6 ohms while an intermittent
duty device is always under 6 ohms.
Or wire to battery and measure coil current. A tennis
ball sized contactor that dissipates more than 20 watts
is in deep doo-doo in a matter of minutes. 1.5 A draw
from a 12v battery is 18 watts . . . .
An intermittent duty device will draw 3-5 amps, 36 to
60 watts.
Bob . . .
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( "Physics is like sex: sure, it may )
( give some practical results, but )
( that's not why we do it." )
( )
( Richard P. Feynman )
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