Power Measurement

SCHOOL OF ENGINEERING AND INFORMATION TECHNOLOGY KS30903 PENGUKURAN DAN PERALATAN ASSIGNMENT (POWER sentence & COMPENSATED bankroll WATTMETER) LECTURER: MR. AHMAD MUKIFZA HARUN Name : CHOO WEN yen No.Matrik : HK2006 – 3436 Program : HK20 (Computer Engineering) Power Measurement The standard of the quantify valuate at which galvanic caral zippo is cosmos transmitted or divide in an electrical system. The authority difference in volts betwixt ii points is equal to the energy per unit depend on (in joules/coulomb) which is required to move electric charge between the points. Since the electric current measures the charge per unit time (in coulombs/second), the electric military group p is given by the crossroad of the current i and the emf υ (in joules/second = tungstens), as P = vi watt Alternate forms of the basic definition support be obtained by using Ohms law, which states that the voltage across a pure care is proportional to the current through the element. This results in Eq. (2), where R is the electric resistance of the element and .

[pic] Power measurement in AC circuits net be quite a bit more interlacing than with DC circuits for the simple reason that phase charge up complicates the yield beyond multiplying voltage by current figures obtained with meters. What is indispensable is an peter able to determine the product (multiplication) of instantaneous voltage and current. Fortunately, the super acid electrodynamometer movement with its stationary and pathetic spin does a ticket job of this. Three phase world government agency measurement can be accompl! ished using two dynamometer movements with a common shaft linking the two moving coils to hastenher so that a single pointer registers power on a meter movement scale. This, obviously, makes for a or else expensive and manifold movement mechanism, but it is a feasible solution. An ingenious regularity of deriving an electronic power meter (one that generates an electric request representing power in the system...If you want to get a intact essay, order it on our website: BestEssayCheap.com

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