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What else can I help you with?
How is the power factor of an Electrodynamometer type wattmeter improved?
Power Factor of an electrodynamometer can be improved by connecting a large resistor in series with the current coil.
What is the line current of a 3 phase 63kw 277 480 vac trasformer?
If the load is balanced across all three phases, and the power factor is 1.0, the line current would be about 76 amps at full load. For a more typical power factor of 0.85, the current would be closer to 89 amps.
What is sag in trasformer?
new divide.
How is power factor improved in fluorescent lamps?
the old ones with transformers you can correct with capacitors incandescent lamps have unity power factor the newer florescent ballasts are closer to unity but tend more towards capacitance
What is the secondary current on a 1kva trasformer?
8.3 amp
How do you reduce power factor value?
No-one ever aims to reduce the power factor, the ideal power factor is equal to 1, and that is the maximum possible value. A load with a power factor of 0.7 draws 40% more current along the supply wires compared to a equal-power load with a power factor of 1. That means that the power loss in the resistance of the supply wires is doubled in the case of the poor power factor. Since the supply company receives no extra revenue for the lost power, it does not like this situation and sometimes penalises users with poor power factors with extra tariffs. The power factor can often be improved by placing a passive reactor in parallel with the load to draw off the reactive volt-amps (VAR or kVAR) so that the supply wiring sees a load with a good power factor. Normally a bad load like a motor draws inductive VARs and in this case it can be corrected with a parallel capacitor that draws an equal number of capacitive VARs. Looked at another way, the added capacitor 'tunes' the load to resonate at the supply frequency.
How you calculate load on trasformer?
P = I * E * Cos (theta)
What environmental factor has improved the height of Americans?
i dont not
How is the power factor improved in an AC system?
by adding the opposite type of reactance. as motors are a common industrial load and their reactance is inductive, add capacitive reactance.
How can Power Factor Correction help you?
An electrical load with a poor power factor draws more current than a load with an improved power factor for the same amount of useful power transferred and can put unnecessary strain on the electricity distribution network. By improving your power factor, you can reduce your electricity bills through lower monthly demand and capacity charges. Typically payback periods for power factor correction are between 1-3 years. Given the life expectancy of power factor correction equipment and the potential savings, it can be a very worthwhile investment. Poor power factor may cause power losses and voltage drops, which can contribute to overheating and failure of motors and other equipment. If your electrical system is near capacity, installation of power factor correction equipment may help avoid costly infrastructure upgrades by lowering the existing electrical demand on your system and improving efficiency stability.
What type of machine that use asynchronous motor?
Typically a synchronous motor is applied in constant speed applications where the higher cost of the motor is offset by the improved power factor realized
What is the power of a factor?
power factor means kw/kva
