I got a pretty high idle power usage for the type apartment. So I did some investigation and noticed after pulling all plugs in my apartment that the Induction hob is using 60w while off.
I'm don't have a lot of knowledge about electricity. But I found out that the the induction hob is connected through a so called "perilex" plug which is being used in Netherland, Germany and Sweden. This plug is connected with two 16amps circuit breaker. Apparently this is not the "real" (rms) power (as i understand it) and won't be billed by the power company. Is this correct?
How can i fix this "wrong" measurement? Can I simple deduct the 60w in the EmonTX sketch? And is the measering (anywhere near) accurate when the cooking plate is in use? Should i hook up a AC-AC adapter? Or should i do something else. I'm a little bit lost here.
Re: How to fix Induction hob standby usage
If you look at An introduction to AC Power in the section "Partially reactive loads" you have what might be happening with your hob.
You have an emonTx but you are not measuring the voltage ( and you are using the emonTx_CT123 sketch? ) so you are measuring the average (rms) current and multiplying by the average (rms) voltage to give you "Apparent Power". But if in diagram 2 the current wave (blue) is shifted so that the peak lines up with the zero crossing of the voltage wave (red), The power wave (yellow) will have equal parts above and below the line, meaning that energy is flowing backwards and forwards between your house and the supply and the average energy transferred is zero.
If you connect an AC-AC adapter, and change to the emonTx_CT123_Voltage sketch, that sketch will multiply current x voltage to give the power at any instant - the yellow wave - then it calculates the average power which is the real power, and so give you the correct reading.
Re: How to fix Induction hob standby usage
A, I get it now. You're right with the assumption that I'm using the emonTX_CT123 sketch.
To bad I dind't order a AC-AC adapter with my iniatal purcharse. But I'm definilty going to order one ,since spending 12 euro extra to improve/correct the reading which is off more then 60w (in comparions to real-power) is a prety good deal.
I hope the emonTH will be released soon so i can average the shipping costs.
Thanks you so much. The thinks you learn are amazing during such a project.