Page 147 - Electrician - 1st Year - TP - Urdu
P. 147

125 1.5.51 ‫( ﻣﺷﻖ‬2022 - ‫ ﻧظر ﺛﺎﻧﯽ ﺷده‬NSQF) ‫ اﻟﯾﮑﮢرﯾﺷن‬:‫طﺎﻗت‬                                                                                        1 ‫ﮢﯾﺑل‬

                                                                       Ammeter Voltmeter      3-phase Wattmeter                       Wattmeter    3-phase   P.F. Calculated 1        P.F.    P.F. Percentage
                                                                       reading reading       apparent reading                         reading    true power                     Calculated 2  measured of error
                                                                                             power in W1 watts                        W2 watts                    Cos ϕ (P.F)
                                                                       I      EPH                                                                 W +W            = W1 + W2
                                                                          PH              volt amperes                                                  12
                                                                                                                                                                    3EPH IPH
                                                            Condition                     3  x  EPH  x  I
                                                                                                           PH
                                                           Motor with
                                                           load                                                                                                                                                        ‫اﭘﻧﺎ ﮢﯾﺑل اور وﺟوﮨﺎت ﻟﮑﮭﯾں اﮔر ﮐوﺋﯽ ﮨﮯ۔‬
                                                                                                                                                                                                                 ‫ اﺳﮯ اﭘﻧﮯ اﻧﺳﮢرﮐﮢر ﺳﮯ ﭼﯾﮏ ﮐرواﺋﯾں۔‬9
                                                           Motor with

                                                           load and
                                                           capacitor
                                                           bank

                                                                                                                               :‫ﮢﯾﺑل‬                                                                                         ‫ ﻣﯾں اﻗدار درج ﮐرﯾں۔ ﻏﻠطﯽ ﮐﯽ ﻓﯾﺻد ﮐﺎ ﺗﻌﯾن ﮐرﯾں۔‬1 ‫ ﮢﯾﺑل‬8

                                                           ________ ‫ ﮐﯽ ﻗدر ﻣﯾں اﺛر ﮨﮯ‬P.F ،‫ﮐﭘﯾﺳﯾﮢر ﺑﯾﻧﮏ ﮐو ﺟوڑﻧﮯ ﮐﮯ ﺑﻌد‬                                                                                                 (Calculated P.F. - Measured P.F.) x 100
                                                                            _______________________________                                                                                                         % error= -------------------------------------------------------

                                                                                                                                                                                                                 Calculated P.F
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