One of the application im working on needs three phase power measurement to be done through micro-controller. The power measurement is in the range of 90kVA. Is there any way to noninvasively/invasively measure the current/voltage to get actual power consumed by load(compressor in this case).
I want to understand a way to measure a Power consumption with a sensor and update data to server with IoT to remote server. micro-controller aspect here is peripheral and any WiFi module can be used to update data to server.
While referring to some material I did came across some methods as Abraham electrostatic voltmeter or Transformer ratio method and some other for voltage measurement.
But need to understand which method is used in commercial measuring instruments. Also is it practically possible to keep any WiFi or RF node for data collection at its vicinity?
Note:I clearly understand the risk at these Power levels. Im here to understand the technology so that i can concentrate on my part of design.