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Flux density Fig. 5.2. core loss for cold rolled steels No. of Turns in LV wdg (t2) = = 400 3 x 10.57 =24.03 24 ( Rounded off ) Phase Current in LV Wdg (I2) = KVAx 1000 3 xLV = 800 x 1000 3 x 440 = 1049.7 A Wattful Current (Iw) = Pix 1000 3 xLV = 1.4725 x 1000 3 x 440 =1.9322 A Magnetizing current (lm) = 1.15 x ATpPh 2 xT 2 = 1.15 x 168.87 2 x 24 =5.7218 A No load Current (I0) = Iw 2 +ℑ 2 = 1.9322 2 +5.7218 2 =6.0392 A Ratio of I0/I2 (I0byI2) = I0/I2 x 100 = 6.0392/1049.7 x 100 = 0.5753 (lies between 0.5 to 1 and hence OK ) 5.2.3 (a) Computer Program in "C" in MATLAB for Part-2 densidad de flujo Fig. 5.2. pérdida en el núcleo de los aceros laminados en frío No. de vueltas en wdg LV (t2) = ≈ = 400 / (√3 x 10,57) = 24,03 ≈24 (redondeada) Fase actual en LV wdg (I2) = (KVA x 1000) / (√3 x LV) = (800 x 1000) / (√3 x 440) = 1049,7 A Wattful actual (Iw) = (Pi x 1000) / (√3 x LV) = (1.4725 x 1000) / (√3 x 440) = 1.9322 A Corriente magnetizante (lm) = (1,15 x ATpPh) / (√2 x T2) = (1,15 x 168,87) / (√2 x 24) = 5.7218 A

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Flux densityFig. 5.2. core loss for cold rolled steels No. of Turns in LV wdg (t2) = Phase Current in LV Wdg (I2) = = 1049.7 AWattful Current (Iw) = Magnetizing current (lm) = No load Current (I0) = Ratio of I0/I2 (I0byI2) = I0/I2 x 100 = 6.0392/1049.7 x 100= 0.5753 (lies between 0.5 to 1 and hence OK )5.2.3 (a) Computer Program in "C" in MATLAB for Part-2densidad de flujoFig. 5.2. prdida en el ncleo de los aceros laminados en froNo. de vueltas en wdg LV (t2) = = 400 / (3 x 10,57) = 24,03 24 (redondeada)Fase actual en LV wdg (I2) = (KVA x 1000) / (3 x LV) = (800 x 1000) / (3 x 440) = 1049,7 AWattful actual (Iw) = (Pi x 1000) / (3 x LV) = (1.4725 x 1000) / (3 x 440) = 1.9322 ACorriente magnetizante (lm) = (1,15 x ATpPh) / (2 x T2) = (1,15 x 168,87) / (2 x 24) = 5.7218 ASin carga de corriente (I0) = ( Iw ^ 2 + Im ^ 2) = ( 1,9322 ^ 2 + 5,7218 ^ 2) = 6.0392 ARatio de I0 / I2 (I0byI2) = I0 / I2 x 100 = 6,0392 / 1049,7 x 100= 0,5753 (se encuentra entre 0,5 a 1 y por lo tanto OK)5.2.3 (a) Programa de ordenador en "C" en MATLAB para la Parte-2