noahmercier wrote:what are contactors and relays for? I have seen them on higher power vehicles but I don't understand what they actually do in the circuit, they don't seem necessary.Contactors.. they are essentially switches.. BUT act differently.. When large amperage applications like a kelly controller are turned on , the massive amperage connection can cause a lot of problems, with connection points, and capacitors..It may also blow small items that run on the same circuit like bulbs lets say.. what the contactor does is start in the open position , with a wide gap , when excited by a 12 v source, the 2 magnetic coils head torward each other, as they head torward each other theres a an arc, a big one.. What the contactor does is THIN this arc and lessen the violence and heat from the arc.. Picture a bolt of lightning inside a main switch , the contactor ( like it sounds ) makes the electrical contact earlier and from further away ( like a taser) thinning that arc and the corresponding heat. Hope that makes sense, it basically makes a 400 amp connection turn on as smoothly as a 100 amp connection.
noahmercier wrote:Do I still have to hook up the disconnect switch? The #1 and #2 cables look like they are an on/off switch for the controller.yes, the small wires only turn on the motherboard, they dont power the caps.so its powered on like a regular controller./
noahmercier wrote:one side of the contactor says positive and the other negative. Do I connect the positive battery connector to the negative contactor side?depends.. if the contactor input is for the 12 v, neg to neg post to pos.. run off 1 battery directly.. thats the EXCITE powerr
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