/challenges-projects/project14/b/blog/posts/inrush-current-limiter-soft-starter-for-ac-dc-loadswww.youtube.com/watch Inrush current/Switch-ON surge is the maximal instantaneous input current drawn by an electrical device when first turned on. Inrush current is much higher than the load’s steady-state current and that’s the source of many ...en-USTelligent Community 12https://community.element14.com/challenges-projects/project14/b/blog/posts/inrush-current-limiter-soft-starter-for-ac-dc-loadsTue, 09 Jun 2020 19:36:27 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c9fc0e3b-cbca-4f3e-b8e8-e7008d2addf9three-phase0<p>It is an interesting solution for reducing inrush current, the one comment I would pass, is that your design would keep the load at its reduced running voltage in event of a failure in the circuit that prevented your relay from operating.</p><p>&nbsp;</p><p>For that 220V circuit, you have used a 22 Ohm, 5 Watt resistor, anything above a 0.5A load, which isn&#39;t much for mains power, is going to overheat that resistor should your relay circuit fail.</p><p>&nbsp;</p><p>You may want to look at your circuit so that under a failure, it just puts the supply straight onto the load without going through the resistor.</p><p>&nbsp;</p><p>Kind regards.</p><img src="https://community.element14.com/aggbug?PostID=9468&AppID=160&AppType=Weblog&ContentType=0" width="1" height="1">