yung capacitor(na nabangit) katumbas ba nung filter capacitor sa dc(rectified)?
Hi friends, maganda yan topic na power factor, minus the latter part. May I add a little more but more on what it is for the lay man.In carriers like airplanes, they use the term "load factor" which is simply the number of occupied seats divided by the capacity in seats.So, ano available at ano ginamit. Sa power generation, gingamit din itong term. When a genset is run, a capacity is generated but they are not all used. The trick is how to save the unused energy to be sold later(not practical actually like charging batteries to use the unused capacity). mas lalo na sa airplane, di na ma saved to be used later.In my province years ago, the voltage dropped to 180 volts in the evening and our flourescent light will not start. I remember, we took them to the electrical store to make them "high power". and what it was, was an installation of low microfrad but high voltage capacitor, AC type. this is quite different from the DC capacitors for filtering ripples in a DC P.S. When i think of what it was doing, I realized that when the starter flicks, it draws current and when off, the current used was dropped. that is when the capacitor gets charged up and in the next flicker, bang, the energy is released.Let's perhaps say that an equiptment does not really use energy uniformly and so waste is introduced. |A capacitor picks up the unused energy and supply it at the next need. Come to think of it, that is what the filter cap is doing in a DC supply. When energy is high, it stores it and when low, it compensates. I used to explain that the filter capacitor is like the water tank. When there is water,it stores and when when there is none, it supplies. Is the power saver effective, like the one sold at ACE? Yes. In industrial plants where they use lots of motors, a huge bank of capacitors is used to correct the power factor or I should say increase it. The proof is in the pudding. Use an AC current clamp meter to check. Ideal is a PF of unity or 1.I used "energy" instead of volts and amps to keep it general.Hope this can be appreciated.BK/09197726274
may penalty sa mga industrial consumers for low power factor, kaya naglalagay ng capacitor banks to correct the power factor, to get bonus. industrial consumers have many motor loads, which are inductive loads, kaya bumababa ang power factor. but just the same, industries are charges also in the Energy they consumed, in kWh, aside from other charges, including the power factor.
...Tell you what, the more I read about the power factor thing, the more I wish a better electric meter be invented because it seems that plants do not really use all the energy read by the meter.Maybe I shouldn't have mention about the one sold in Ace. But it is interesting to note that the clamp meter actually dropped its reading. The only way that I think for the benefit not to be true, is if the Meralco meter is a bit different than a clamp meter. One has to be wrong. I worked for the Meralco group for many years but that does not make me an expert. I have no intention to argue with you guys. I posted something after reading questions like what is really this power factor thing and that is the reason why I simplified it. After all this section is meant for nubies. Thanks for the comments on my post!BK