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Low amp draw battery master contactor..pulse interference

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jrichard(at)ccser.com
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Posted: Sun Jan 22, 2006 8:48 pm Post subject: Low amp draw battery master contactor..pulse interference

Eric and Others..



The EV200 uses a pulsed coil energizer scheme to enable a low average

current draw to hold the coil in place.  Normal aircraft contactors use DC

to close the coil then the same DC to hold the coil in place.  I talked to

the Kilovac rep about the pulse circuit and he said they have had a few

complaints about interference from the pulsing.  I'm not sure what kind of

interference, but I suspect conducted interference on the coil energizing

line spreading into other sensitive audio circuits.  



Here's a web link to the EV200 PDF datasheet

	

	http://relays.tycoelectronics.com/datasheets/ev200.pdf



Has anyone experienced this interference and does the normal filter scheme

for noisy loads published by 'lectric Bob take care of it?  



John Richardson

jrichard(at)ccser.com

Spokane WA



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