Three phase power - the theory Dr Chris Horne 29 October 2021 19:45 Updated Article to follow. Related articles Three phase systems The zappi phase rotation setting Supply phase allocation / connection on a three phase zappi ECO/ECO+ charge rates in a three phase zappi zappi 2 - Firmware Version 3.171 Comments 1 comment Sort by Date Votes MW_eUP 03 August 2022 07:33 Please explain, maybe in this article? Easy to understand even for non-electricians why it is so important for the Myenergy products that not only a right rotating field is required, but also that swapping the phases within the right rotating field leads to incorrect behavior of the Zappi! The electrician with me was sure that he had done everything right if he only observed the right rotating field. Unfortunately, the Zappi didn't see it that way. And I couldn't explain to the electrician why it was "not" right! 0 Please sign in to leave a comment.