the easiest way is to use a shunt resistor and measure the voltage across it, and for AC you could use a current transformer. But the advent of the Hall-effect sensor has provided us a much better ...

A power analyzer can be used to identify power guzzlers and provides valuable information for optimization by taking measurements under different operating conditions.

Additionally, the system provides real-time burden measurement and recording ... The system also automates the test current rundown process and offers a transformer demagnetization feature ...