Posted by Bill in IL on October 26, 2009 at 10:06:37 from (131.43.10.190):
The magnetic contactor for our bin fan has been acting up the last couple of years. Thinking I better get it figured out before we have a problem.
Its an axial type 10hp fan with a magnetic contactor for the starter. Last year it started with a buzzing noise coming from the contactor until the fan was up to speed and you have to hold down the momentary contact start button till the fan get up to speed. I am assuming that this is due to the current draw at startup and voltage and avaliable current too low to hold the contactor in during startup.
But why? I was wondering if the coil in the contactor is getting weak.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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