<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div><span></span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1460151934034_4118" dir="ltr">OK figured out what I am doing.</div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1460151934034_3932" dir="ltr">For this experimental stage I will just have a circuit breaker on the battery + side of the main switch</div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1460151934034_4080" dir="ltr">& pre-charge resistor. I will trip this breaker when finished to take current off the resistor.</div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1460151934034_4191" dir="ltr">When operational on the sub I will have a relay to a solenoid switch.</div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1460151934034_4081" dir="ltr">When the relay is turned on, the pre-charge resister will see current & charge the capacitors</div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1460151934034_4082" dir="ltr">but there will be a timer circuit with a delay of 1 second before power goes to the solenoid switch.</div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1460151934034_4083" dir="ltr">Cheers Alan<br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1460151934034_2596" style="display: block;"> <div id="yui_3_16_0_ym19_1_1460151934034_2595" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1460151934034_2594" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1460151934034_2593" dir="ltr"> <font id="yui_3_16_0_ym19_1_1460151934034_2592" face="Arial" size="2"> <hr size="1" id="yui_3_16_0_ym19_1_1460151934034_3463"> <b><span style="font-weight: bold;">From:</span></b> Alan James via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, April 9, 2016 4:26 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] Pre-Charge Resistor<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1460151934034_2612"><br><div id="yiv0480069697"><div id="yui_3_16_0_ym19_1_1460151934034_2614"><div id="yui_3_16_0_ym19_1_1460151934034_2613" style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);"><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2409"> Does anyone have any experience with pre-charge resistors.</div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2403">I am wiring up my Kelly controller & they provide a pre-charge resistor similar to this one.</div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2421" dir="ltr"><a id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2430" href="http://www.electricmotorsport.com/wirewound-pre-charge-resistor-5w-10k-ohms.html" target="_blank" rel="nofollow">http://www.electricmotorsport.com/wirewound-pre-charge-resistor-5w-10k-ohms.html</a></div><div id="yui_3_16_0_ym19_1_1460151934034_2636">They are put across the terminals on a main power switch so that they charge up the banks</div><div id="yui_3_16_0_ym19_1_1460151934034_2615" dir="ltr">of capacitors that motor controllers have. Without them there is a large inrush of current to </div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2553" dir="ltr">the capacitors that can cause arcing to switches & damage to controller components.</div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2552" dir="ltr">However if you wire it across the power switch there is always some current going to the</div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2564" dir="ltr">controller. It probably only drives the ON LED on the motor controller, but I am not sure</div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2594" dir="ltr">of this. I can have another switch or circuit breaker up stream of the main switch, but you</div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2618" dir="ltr">would have to turn them on in the right sequence. I have heard of circuits that have delays,</div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2667" dir="ltr">so that when the power switch is turned on, power runs through the pre-charge resistor first.</div><div id="yui_3_16_0_ym19_1_1460151934034_4085" dir="ltr">Are there marine switches with built in pre- charge circuits?</div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2657" dir="ltr">Regards Alan<br></div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2441"><br></div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2468" dir="ltr"><br></div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2415"><br></div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2401"><br></div><div id="yiv0480069697yui_3_16_0_ym19_1_1460131573856_2402"><br></div></div></div></div><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></div></body></html>