Monitoring 220VAC
Posted: Mon Oct 09, 2017 12:27 pm
Well, I have taken the big step!!!! I have purchased a GEM System 2 (Donut version), and it should be arriving tomorrow. Just received my shipment of DS18B20 temperature sensors this morning and a few other electronics toys. The plastic case to protect the GEM from the elements, arrives on Thursday. Here in Florida, our panels are mounted outside.
So I was looking over the documentation and had a question. The PT that is used to measure the line voltage is only connected to one of the phases. We tend to get a lot of 1/2 power outages. Yes, we lose power on only one side of the service. Can play hell on some of the equipment, but lucky for me, the AC shuts down when it only sees one phase and does not start up until they are both back in service.
So, is there an option to install a second PT and be able to monitor both phase voltages? Probably not... Wait... how about a 220 VAC PT? I would see the voltage (1/2) and could determine which phase is out, by looking at the current on the mains. PT (220VAC) used in Europe... Forget that idea....
So I was looking over the documentation and had a question. The PT that is used to measure the line voltage is only connected to one of the phases. We tend to get a lot of 1/2 power outages. Yes, we lose power on only one side of the service. Can play hell on some of the equipment, but lucky for me, the AC shuts down when it only sees one phase and does not start up until they are both back in service.
So, is there an option to install a second PT and be able to monitor both phase voltages? Probably not... Wait... how about a 220 VAC PT? I would see the voltage (1/2) and could determine which phase is out, by looking at the current on the mains. PT (220VAC) used in Europe... Forget that idea....