I have an outdoor hot tub that is run off of a gfci protected 240 volt circuit.
I came out the other night to find the gfci was tripped with no obvious cause.
I'm looking to monitor the power status downstream of the gfci so that I can prevent a possible freeze up in the winter.
Does anyone know of a device similar to the Ring extender that will switch to internal battery power when mains is lost? It has to run on 240v, as there is no neutral at the tub, only 2 hots and a ground.
Connect the terminals of the current switch to any Hubitat-compatible contact sensor that supports external terminals. Such contact sensors are made by Ecolink and GoControl. As long as there is current, the contact sensor will register as closed. If the GFCI pops, the absence of current will make the contact sensor register as open.
Note: Don't run both the hots through the current sensor switch. Because they cancel each other out, so the contact sensor will always register as open.
This current switch won't work. I clamped it around one of the hots and had my meter on the outputs. I tested it and found my hot tub must not draw the required 0.35 amps at rest. When the heater or one of the pumps turn on, the solid state switch in this current switch closes, but it opens when the pump or heater turns off.
It's a great switch though. I think im going keep it and use it for monitoring my main sump pump.
I might have to resort to temperature monitoring for now.
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