Page 398 - Electrician -1st Year - TT

ªuú]ôhP ªuÑtß (ampere-turns) A§LUôL • CuÑúX`u ¨ûX (Insulation level)
Es[Rôp ©ûWU¬ ªuÑt±u A§L
• @l¬dÏYu£ (Frequency)
ªuú]ôhPjRôp CÚm× úLô¬p A§L
LôkRdúLôÓLs HtTÓj§d ùLôÓdÏm. CRu • ¥Wôuv@TôoUúW`u ®¡Rm (Transforma-
®û[Ü A§L ùYlTm HtThÓ tion ratio)
¥Wôuv@TôoUo G¬kÕúTôÏm ¨ûX • Õp≠Vj§u YûL (class of accuracy)
HtTÓm. úUÛm ùNLuP¬ §\kÕ CÚlTRôp
• ùYlT ªuú]ôhP Ïß¡V LôX A[Ü
A§p A§L ªu]ÝjRm HtTÓm. CÕ
Utßm ARu A[Ü úSWm. ERôWQUôL
BTjRô] ¨ûXVôÏm. AÓjÕ
ªuú]ôhP ¥Wôuv@TôoUo
ªuú]ôhPm TôVôR TϧLû[ ¨X
Lh¥Pj§tÏs CP ãr¨ûX, £\l× ¨ûX
CûQl× ùNnVlTP ªuú]ôhP
B® ùY°úVßm CPm, ×ûL, úYß
¥Wôuv@TôoU¬u HúRàm JÚ Øû]ûV
YûLVô] YôÙ RôdÏm ¨ûX, A§oÜ,
¨X CûQl× RW úYiÓm. CÕ §\kR Ñtß
A§L ÏlûT úNÚm CPm, ÕLsLs
HtTÓm úTôÕ A§L ¨ûX ªu]ÝjRjûR
T¥Ùm CPm B¡V ¨ûXûU«û]
(static potential) HtTPôRYôß TôÕLôdÏm. AÕ
ùLôiPûY.
UhÓUpX ªuLôl× TXÅ]UûPÙm úTôÕ
CÕ TôÕLôlûT HtTÓj§d ùLôÓdÏm. • Õp≠VjRuûU úYß áÓRp úRûY
JußdÏ úUtThP ªuú]ôhP TôÕLôl× RuûUdÏ úRûYVô]ûY.
¥Wôuv@TôoUoLû[ Ñt±p CûQdÏm • £\l× TVuTôÓLs, ϱl©hP A[Ü
úTôÕ JúW Øû]l×s[Ytû\ Juß EûPVûY.
úNojÕ TPj§p Lôh¥Ùs[Yôß ¨X
©ûWU¬«u rated ªuú]ôhP A[Ü
CûQl× ùNnRp úYiÓm.
(Standard values of rated primary current):
ªuú]ôhP ¥Wôuv@TôoUoLû[
ϱl©Óm ®Rm (Specification of a current trans- ϱl©hP rated A[Ü ùLôiP
former) : ªuú]ôhP ¥Wôuv@TôoUo (cur- ªuú]ôhP U§l× Utßm @l¬dÏYu£
U§l× B¡VûY 10, 15, 20, 30, 50, 75 Bm©Vo
rent transformer) LûPL°≠ÚkÕ YôeÏm úTôÕ
Utßm ARu RNU A[Ü ùTÚdLp Gi.
¸rLiP úRûYVô] ϱl×dLû[
T¬úNô§jÕ YôeL úYiÓm. ùNLuP¬«u rated ªuú]ôhP A[Ü
• ªu]ÝjR úWh¥e, ªu YZe¡L°u (Standard values of rated secondary current) : Rated
YûL Utßm ¨X CûQl× ¨ûX A[Ü ùLôiP ùNLuP¬«u ªuú]ôhP
(ERôWQUôL 7.2 kV ¡.úYôph, êuß úTv A[Ü 1 Bm©Vo ApXÕ 5 Bm©Vo
Utßm ªuRûP êXm ¨X CûQl× ùLôiPûYVôL CÚdÏm.
ApXÕ §P ¨X CûQl× GuTûR
ϱjÕd á\ úYiÓm)

ªu]ÝjR ¥Wôuv@TôoUo (Potential transformer)

úSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• ªu]ÝjR ¥Wôuv@TôoU¬u LhÓUô] AûUl× Utßm CûQl× B¡VûY Tt±
®Y¬jRp
• ªu]ÝjR ¥Wôuv@TôoU¬u A[®û] ϱl©Óm Øû\.

LhÓUô]m Utßm CûQl× (Construction A[Ü (VA) B]Õ ªLf £±V A[®û]d
and connection): §\u ¥Wôuv@TôoU¬u ùLôi¥ÚdÏm.
LhÓUô] AûUl× GlT¥ Es[úRô AúR
CRu ©ûZjRuûUûV Ïû\lTRtLôL CkR
úTôp CRu AûUl×m CÚdÏm. C§p Es[
¥Wôuv@TôoUo Ïß¡V LôkRdúLôÓ
£\l× úYtßûU Gu]ùY²p úYôph
AûUl× ùLôiPRôL CÚdÏm. SpX
Bm©Vo A[ÜLs Rôu ªu]ÝjR
RWØs[ úLôo CÚm×j RLÓL[ôp Ïû\kR
¥Wôuv@TôoU¬u ªu]ÝjR ªuú]ôhP
LôkR APoj§ Gi ùLôiPRôL CÚdL

378 TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.12.98