Ok, in my quest of trying to understand knee point voltage I came to a dead end. I do understand that this is a saturation point, I do understand that to test CT for knee point voltage you apply voltage to its secondary until you see a higher change in current (that is where you get Vkp and Im)...
I have a Class X CT with a ratio of 1200/600/1A and on the nameplate it says I.EX.V.K.P. 0.018 614. I assume Im<18ma and Vkp>614. Now the testing performed on this CT goes up to 280V reaching Im of 18 mA (and says Vkp>280). I am a bit confused with this as I need to match existing set of CT's...
Dear waross,
I should have indicated that this question came up when I was specifying synchronous generator in SKM power tools. I've put voltage as 690V and got the following results:
1) 100kVA 0.8pf = 83.7A
2) 100kVA 1pf (or any pf) = 83.7A
3) 80kW 0.8pf = 83.7A
4) 80kW...
Dear Skogsgurra
I just feel like a lot of people misunderstand electricity just because of the fact that we explain it in a way that does not seem logical.
Capacitors store potential energy (electric field), inductors kinetic (magnetic field) and when we supply that first portion of energy...
I am trying to wrap my head around FACTS, reactive power and voltage control. But when I read explanations like this:
Synchronous generators, SVC and various types of other DER (Distributed energy resource) equipment are used to maintain voltages throughout the transmission system. Injecting...
Why do we need to specify PF of a generator? I mean if we indicate kW then we should indicate the worst power factor so that not to exceed the total current generator can handle. But if we specify kVA, PF shouldn't be important (I mean it will be important when we start looking at the load, but...
