Page 403 - Electrician -1st Year - TT

§\u '0' YôÏm. LQd¡Óm U§l×Ls GpXôm C§p, I , V Utßm P ÏßdÏf Ñt±u
sc SC SC
A§L ªu]ÝjRØs[ TdLjûR Øû\úV Bm©Vo, úYôph, Yôhvû^
ϱl©ÓYRôÏm. ϱl©Ó¡\Õ.
R equivalent ªuRûP R , Z Utßm X úTôu\ûYLs A§L
e eH eH eH
ªu]ÝjR TdLj§u equivalent ªuRûP,
X equivalent reactance
e
Cm©Puv RûP Utßm ¬VôdPuvû^
R equivalent ªuRûP A§L ªu]ÝjR
eH ϱl©Ó¡\Õ.
TdLj§p
ERôWQm (Example)
X A§L ªu]ÝjR TdLj§u equivalent
eH 20KVA , 2400V/ 240V 50Hz, ¥Wôuv@TôoU¬u
reactance
ÏßdÏfÑtß Bn®u ®YWm ¸úZ
Z A§L ªu]ÝjR TdLj§u equivalent
eH RWlThÓs[Õ.
Cm©Puv
V , = 72V, I = 8.33A, P = 268W.
SC SC SC
P ÏßdÏf Ñtß ªu§\u
SC
A[ÜLs A§L ªu]ÝjRØs[ TdLjûR
I ÏßdÏf Ñtß ªuú]ôhPm
sc A¥lT¥VôLd ùLôiPûY.
V ÏßdÏf Ñtß ªu]ÝjRm
SC ¾oÜ (Solution)
R =
eH R = =
eH

Z =
eH
Z =
eH
and X =
eH
and X =
eH
=

¥Wôuv@TôoU¬u TVàß §\u (Efficiency of transformer)

úSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• CZl×L°≠ÚkÕ TVàß §\u LQd¡ÓRp
• EVokR A[Ü TVàß §\u ¡ûPdL Es[ ¨TkRû]Lû[ á\p
• T¡oUô] ¥Wôuv@TôoU¬p ØÝ Sôs TVàß §\u Tt± YûWVßjÕd áßRp.
ªð£¶õ£è â‰î õ¬èò£ù I¡Qò™ ¥Wôuv@TôoU¬p ðòÂÁFø¡ èí‚A´‹
àðèóíƒèO™ Üî¬ìò ðòÂÁ Fø¡ «ð£¶ ªð£¶õ£è ¥Wôuv@TôoU¬u
Ýù¶, ÞöŠ¬ð Ü÷ŠðÕ Cø‰î º¬ø B°‹.
I芪ðKò ¥Wôuv@TôoUoèÀ‚° Fø¡ Iè
output power output power
η = = .....(1) ÜFè Ü÷M™ Þ¼Šð å¼ Cô
input power output power + losses ðK«ê£î¬ùè¬÷ âOò º¬øJ™ ªêŒ¶
ÞöŠ¹è¬÷ ÜPòô£‹.
ÞF™ â¡ø °Pf†¬ì ðòÂÁ Fø¬ù‚
°P‚è °PŠH´A«ø£‹. êñ¡ð£´ 1ä 100 å¼ ¥Wôuv@TôoU¬p Fø‰î ªu²ŸÁ
«ê£î¬ù Íô‹ Þ¼‹¹ îè´èO™ ãŸð´‹
Ý™ ªð¼‚Aù£™ ðòÂÁ Fø¡ êîiîˆF™
úLôo ÞöŠ¹ (core loss) ñŸÁ‹ °Á‚°„ ²ŸÁ
A¬ì‚°‹.
«ê£î¬ù Íô‹ ªê‹¹ ÞöŠ¹ (copper loss)
¥Wôuv@TôoU¬u ðòÂÁ Fø¡ Iè ÝAòõŸ¬ø è‡ìPòô£‹. Þšõ¬èò£è
ÜFèñ£è Þ¼‚°‹. Üî£õ¶ 95 ºî™ 98 ¥Wôuv@TôoUoL°p «ñŸªè£‡ì
êîiî‹ õ¬ó Þ¼‚°‹. ¥Wôuv@TôoU¬p MðóƒèOL¼‰¶ ꟫ø‚ °¬øò å¼
ãŸð´‹ ÞöŠ¹ ªè£´‚èŠð´‹ FøQ™ Iè‚ ¶™Lòñ£è ðòÂÁFø¬ù b˜ñ£Q‚èô£‹.
°¬ø‰î Ü÷õ£è 2 ºî™ 5 êîiî‹ Þ¼‚°‹.

TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.12.99 & 100 383