Page 189 - Electrician -1st Year - TT

CߧVôL £e¡s úTv UôߧûN ÅÓL°p £e¡s úTv ªu]ÝjReLú[
ªuÑtßdL°p LôQlTÓm SuÏ TVuTÓjRlTÓ¡u\]. L , L Utßm L þdÏ N
1 2 3
A±VlThP ùRôPo×Ls êuß úTv ªu B¡VûY Y¬ûN«p T¡oÜ ùNnVl
ÑtßdL°Ûm TVuTÓ¡u\]. ThÓs[]. (AÝjRm Ïû\kR ªuNôWm).
B«àm A§L A[Ü ùNVpTôh¥û]
ac
active tive pow P P
powerer
Cos s
Co ɐ ɐ = = = = ùTt±ÚdÏm. ùT¬V ÑûULÞdÏ (ERôWQm
appar pow S S AC 3 úTv úUôhPôoLs ûXu ªu]ÝjRm
powerer
apparent ent
reactive active
re pow Q Q (A§L AÝjRm ùLôiP ªuNôWm) YZeLl
powerer
Si
Sin n ɐ ɐ = = = =
appar pow S S TÓ¡u\]. B«àm úYßThP A[®Xô]
powerer
apparent ent
TVuTôh¥û]d ùLôiP ETLWQeLs R²
CûR Fig 3þXõ ÚkÕ LôQ Ø¥¡\Õ. úTvL°p CûQdLlThÓs[]. G]úY
AkR úTvLs ®j§VôNUôL TÞúYt\l
Cos GuTÕ §\u LôW¦ (Power factor) Guß
TÓ¡u\]. úUÛm CÕ SôuÏ Lm©, 3 úTv
AûUl× ªuÑt±p Es[ úTvLs
NU²PlTPôR ÑûU«û]úV ùTtß
CÚd¡u\] GuTûRÙm LôhÓ¡u\].
JÚ vPôo CûQl©p NU²PlThP
AûZdLlTÓ¡\ ùTôÝÕ sin Yô]Õ £X TÞ (Balanced load in a star connection) (Fig 5) :
úSWeL°p G§o ùNVpTôhÓ §\u LôW¦ JÚ vPôo CûQl©p JqùYôÚ úTv
(reactive power factor) Gu\ûZdLlTÓ¡\Õ. ªuú]ôhPØm úTv ªu]ÝjRm Utßm
Cm©Puv `Z' B¡VYt±u ®¡RjRôp
NU¨ûXVt\ TÞ (Unbalanced load)
¨oQVm ùNnVlTÓ¡u\].
(Fig 4) : ªu Bt\p YZeLÛdLô] ªL
YN§Vô] T¡oUô] Øû\Vô]Õ 415/240
úYôph SôuÏ Lm©, 3 úTv UôߧûN
ªuú]ôhP AûUlTôÏm.

CkR EiûUVô]Õ ClùTôÝÕ JÚ
ERôWQj§u êXUôL Eߧ
ùNnVlTh¥Úd¡\Õ.
CÕ ªuNôWjûR TVuTÓjÕTYoLÞdÏ JúW
JqùYôußm 10 KmLs ùUôjR ªuRûP
úSWj§p êuß úTv Utßm £e¡s úTv
ùLôiP JÚ vPôo CûQl× ÑûUVô]Õ
ªuNôWjûR YZeÏYRtLô] Nôj§Vd
ûXu ªu]ÝjRm V = 415V EPu á¥V JÚ
á±û]d ùLôÓd¡\Õ. (Fig 4) ERôWQj§p L
3 úTv AûUl× ªuÑt±p CûQdLlThÓ
ùL#ôÓdLlThÓs[ AûUl©u T¥
Es[Õ. (Fig 5)
Lh¥PeLÞdÏ ªuNôWm YZeLXôm.
vPôo CûQl©u AûUl×L°u LôWQUôL
úTv ªu]ÝjRm 240V (415/ 3 ) BL CÚd¡\Õ.

TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.5.52 - 56 169