I need a circuit that is 120VAC/60Hz line triggered that can be adjustable or fixed angles that will allow me to energize 24VDC contactor at peak voltage whether I am using 120VAC, 277 or 480VAC. So the circuit needs to be from 0 degrees to almost 360 to start until I can dial in appropriate angles based on contactor contact closure delay time. Once I have a good concept, I can make necessary component changes to get it to work, unless the contactor on delay time variance is too wide. I had thought about sine to sawtooth circuit to a adjustable reference comparator and latch/reset circuit, but a simple sine to sawtooth would only give 180 degrees range.
Currently using scope to capture random inrush using current probe on driver input while switching input power. Must repeat several times to capture highest inrush. Planning on building inrush fixture and would like to be able to capture peaks based on timing. I can pick the 277 line that is in phase with the 120VAC line voltage so those two tests would use the same delay, but the 480VAC test would require a different phase angle.
I've attached a typical inrush screen capture and a quick look at my temporary setup.
Thanks for any help offered in advance!!
Currently using scope to capture random inrush using current probe on driver input while switching input power. Must repeat several times to capture highest inrush. Planning on building inrush fixture and would like to be able to capture peaks based on timing. I can pick the 277 line that is in phase with the 120VAC line voltage so those two tests would use the same delay, but the 480VAC test would require a different phase angle.
I've attached a typical inrush screen capture and a quick look at my temporary setup.
Thanks for any help offered in advance!!
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