Just when you thought it couldnt get any worse

[Isetech]

Time to throw away your current clamp meter.


https://www.youtube.com/watch?v=i6IN...hannel=Sunsynk

[Isetech]

A nice little test for all the smart people.

The inverter is drawing 16 watts.

The current clamp indicates 80 watts.

Lets see some calculations.

[Isetech]

By the way KW= KVA X PF

5000 VA inverter with a 0.8 PF = 4000 watt inverter

Some inverters claim they have a PF of 1, that means a 5000 VA (5 KVA) x 1 = 5000 watts (5 KW)



This was a discussion had many years ago when LED became the next best thing since sliced bread.

Some LED had a PF of 0.2. Install 2000 of them in a commercial building it could get interesting.

Led lamps have improved since then, I do believe the PF factor has improved to at least 0.5 and better.

[Dylboy]

Very keen to watch this later.

I see on those small voltronkcs it gives Watts and VA... VA always more.

Where this to me is interesting is that the battery needs to discharge all the power so the KVA. So using watts is not accurate.

I see it draw 1000 watts, but actually it could be 1200 VA (depending on all the loads PF) so the battery then will not run to calculations

Sent from my CPH2197 using Tapatalk

[Justloadit]

The reason why ESKOM wants you to be close to unity in your load, as the generators have to generate amps as opposed to KVA.

Another reason to understand that there is equipment out there which has a specification as "PFC" also known as power Factor Correction.
This is done electronically, in which the electronics by doing boost switching, ensures that the same current is drawn from the supply all the way from the zero crossing to the peak of the cycle, and rectifying it into a DC, which is then fed into the equipment that consumes the energy.

Effectively an inductive load such as a motor on a VSD drive now draws power from the grid with a unity power factor.