Abstract

Methodology, equipment, precision, immunity to electromagnetic emissions and reliable measurement results are important questions for electrical energy measurements. Widely used smart energy meters show good results under laboratory tests and in ordinary applications, but are not very suitable for industrial digital electrical energy supply environment. A different method and inexpensive equipment are used to overcome the above mentioned. The measured power balance between 15 robotized manufacturing cell measurement points (only power losses not measured are the ones in cables) varies in a range of 1,8% (measurement data rate- 20ms), despite the high level of electromagnetic emissions inside and outside of electric cabinets created by power converters.

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