Thank you very much for your attention. I don’t know anything about Blondel’s theorem, I like to learn about it and appreciate you for this reminder. According to electrical measuring principles the three wattmeter and two wattmeter methods will have equal result in measuring of power consumption in three wire and three phase systems in ideal conditions. But we have not measuring device without any inhere errors. As you know amount of errors can be related to circuit, accuracy of measurement equipments and special measuring conditions. For example in that mentioned test, the power factor of circuit is very low because the generator winding inductance property is very high in compare its resistant and so on. I think we must focus on our special condition of circuit.