Effect of harmonics and magnetic influence on watthour meters

The paper is dealing with power formulations of non-sinusoidal systems. Furthermore the novel IEC recommendation of digital energy meters to measure the active energy should be revised. There are different digital energy meters on the market. Results of laboratory tests are given on the accuracy of energy meters from different mafacturers. Some customers attempt to manipulate the meter to cause it to under-register or even run backwards, effectively using power without paying for it. They excuse this by referring to the increasing costs of energy, perceived corrupt profits or actions of the electricity company, etc. Here we give some results infighting against the meter's manipulation too.