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hi guys. I'm installing my albright sw205 primary and secondary switches. The manual suggests installing a resistor in-line with the contactors to decrease arcing and wear on the contactors. I'm 120v dc, I don't know If I'm doing the math right but I come up with a 5watt, 250 ohm resistor. Interestingly enough, these are used items and I got the manual shipped with them ,and they were reportedly used for two years without resistors in place. . there is a small amount of arc residual on the primary side (+) and almost none on the secondary (-) side. Anyone with experience and advice on these switches? thanks
 

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hi guys. I'm installing my albright sw205 primary and secondary switches. The manual suggests installing a resistor in-line with the contactors to decrease arcing and wear on the contactors. I'm 120v dc, I don't know If I'm doing the math right but I come up with a 5watt, 250 ohm resistor. Interestingly enough, these are used items and I got the manual shipped with them ,and they were reportedly used for two years without resistors in place. . there is a small amount of arc residual on the primary side (+) and almost none on the secondary (-) side. Anyone with experience and advice on these switches? thanks
Hi -ace,

I have used these. Just looked at this http://www.tecknowledgey.com/pdf/sw200series.pdf I see no mention of "resistor in-line". Don't quite know what you're talkin' about. Can you post up a link or scan of that manual? Isn't the precharge resistor, is it?

major
 

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sorry Major, my EV-lingo sucks!! I'm at work and trying to wing it, actually I think the term IS precharge resistor. I will review the lit. this evening and RSVP thanks.
 

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Ok Major here is page 10 from the curtis manual. It seems pretty straight forward. I'm using the 1231c 88xx controller, It would appear that the coil diode is in place. thanks again.
 

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