I am being asked to create a Hassio based system to monitor an industrial 380VAC 3 phase compressor motor that uses up to 17kWh. The one part of this project I am stuck on is finding a device that can:
confirm all phases are active
measure power consumption when motor is active
provide an hour usage meter of the motor
I’ve been searching the web for 6 days and cannot find anything that can work with Hassio. Can anyone please point me in the right direction?
As I understand it, 380VAC three-phase means 220V from any phase to neutral; and the 120A per channel monitoring should cover your 17kW (not 17kWh) motor.
Thats pretty much the same as my suggestion, non intrusive cable clamp. But its very expensive compared to pzem… that can be realised around 30 euro for 3 phases… just a thought.
He’s using a 17kW 3p motor, the transients alone are going to vaporize that thing on the voltage measure entrance. Not even speaking of a loss of phase situation. Transients on motors of that power range can easily reach 1kV or more.
@Rocco, This is some serious motor. Maybe the Shelly 3EM, but make sure the module can manage inductive transients on the voltage measure inputs. If measuring equipment of that power range, I’d rather spend some more and go with something professional like the Legrand EMDX3 with modbus. Obviously, that’s a completely different price range.
Well yeah, that’s what they say on Ali And it’s not so much about the current (it’s using a clamp anyway), but about potentially very high voltage spikes on the voltage measure entrance. Inductive loads are complicated, especially loads in that power range. A 17kW 3p inductive load is waaay past the point I would use some cheap stuff from Ali on.
Resistive loads like lights or heating or so are much less complicated of course and using these kind of cheap modules is ‘safer’. That said, I would personally not use anything from Ali that goes on 230V anyway, but that’s just me.
The 17kW is a demo project with eventually pushing out to much larger 225kW. At the moment the client is looking at a proof of concept as he wants a web-based GUI with alerting.
I do appreciate the suggestion and at that price point I will use your recommendation for monitoring my pool pump. I live off-grid, and with IFTTT combined to weather forecasts, can shut off the pumps.
And it’s not so much about the current (it’s using a clamp anyway), but about potentially very high voltage spikes on the voltage measure entrance. Inductive loads are complicated, especially loads in that power range. A 17kW 3p inductive load is waaay past the point I would use some cheap stuff from Ali on.