Reply to "Your Experien ce With PSX-1-AC ?"

rplst8OGR Forum Member

@Norton posted:
I don’t see any way the PSX AC can be any faster than a 180 watt brick. This is for AC not DC. AC passes through zero 120 times a second. You can’t sense a short circuit when there is no current. Only as it approaches max voltage can it sense a change in current.

There is no current flowing only during those zero crossings, the rest of the time, the current is proportional to the load and voltage. During a short, the resistance drops to near zero, and current will rise to infinity. Obviously, thats not possible, but it does rise well above the trip point.

My guess is that the PSX-AC can trip about as fast as the sample rate allows it. Assuming the device is sampling the current somehow.

6/23/218:23 PM

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