Page 355 - Electrician -1st Year - TT

Ïû\Yô] ªuRûP AkR LÚ®«u
Øû]LÞdÏ CûP«p (Fig 1) I R = I R GuTÕ BL Uôßm
SH
SH
M
M
CûQdLlTÓ¡\Õ.
CkR NUuTôh¥XõÚkÕ AmÁhP¬u
GpûXûV GkR A[®tÏ úYiÓUô]ôÛm
®¬YôdLm ùNnVj úRûYlTÓm CûQ
ªuRûP (shunt) LQd¡PXôm.
C§p,
R = CûQ ªuRûP (shunt resistance)
SH
BLúY, CûQ ªuRûPL[ôp LÚ®Vôp I = ÁhPo ªuú]ôhPm (meter current)
M
A[dLdá¥V ªuú]ôhPj§û] ®P R = SLÚm Lô«Xu ªuRûP (resistance of
M
A§LUô] ªuú]ôhPjûR A¥lTûP moving coil instrument)
LÚ®«úX A[dL Ø¥Ùm.
I = CûQ ªuRûP«p TôÙm
SH
JÚ Nuh (shunt) GpûXûV ®¬YôdL ªuú]ôhPm (current flow through shunt).
GqYôß TVuTÓ¡\Õ GuTûR ׬kÕ
CûQ ªuRûP«p TôÙm
ùLôs[ 2 ªuRûPLû[ CûQVôL
ªuú]ôhPj§u U§l× (I ) NôRôWQUôL
CûQjRôp A§p ùNpÛm SH
ªuú]ôhPj§u úYûX ùNnÙm ®Rj§û] A[dLlTÓm ùUôjR ªuú]ôhPm Utßm
A±kÕ ùLôs[ úYiÓm. EiûUVô] ÁhP¬u ØÝ A[ÜúLôp
®XLXõu ®j§VôNm BÏm.
CûQ ªuRûP NUuTôÓ (The shunt equa-
tion): JÚ ÁhPo Utßm CûQ ªuRûP«u I SH = I – I C§p I = GuTÕ ùUôjR
M
(shunt) úNodûL CûQVô] ªuÑtû\ ªuú]ôhPUôÏm.
úTôu\Õ. úUÛm ªuRûP R G] ÁhPo Utßm CûQ ªuRûP R Utßm R
2 1 2
ùTV¬ÓYRtÏ T§XôL SLÚm Lô«Xõu CûQVô]Õ (parallel) úTôX ùNVpTÓm.
ªuRûPûV ϱdÏm R G] ùTV¬PXôm.
M
ªuRûP R þI R Guß ùTV¬PXôm. R
1 SH SH B]ôp,
`uh ªuRûPûV ϱd¡\Õ. ©\Ï,
ªuú]ôhPm I Utßm I , I Utßm I G]
R1 R2 SH M CûQ ªuRûP (`uh) LQd¡ÓRp
Uôßm BLúY CkR NUuTôÓ I R = I R
R1 1 R2 2 (Calculating shunt resistance): JÚ ªpXõ
GuTûR I R = I R G] ϱl©PXôm.
SH SH M M Bm©Vo ÁhP¬u GpûX 10 ªpXõ
(Fig 2) Bm©VWôL A§LlTÓjÕYRôL ûYjÕd
ùLôsúYôm. SLÚm Lô«Xõu ùW£vPuv
Fig 2
27 Kmv G]Üm ùLôsúYôm. ÁhP¬u
GpûXûV 10 Bm©VWôL A§LlTÓjÕRp
Gu\ôp ØÝ A[ÜúLôXõp 10 ªpXõ
Bm©VoLs Aû]jÕ Y¯jRPj§Ûm
ªuÑt±Ûm Tôn¡u\Õ GuTRôÏm. (Fig 3)
I = 1 mA (0.001 A)
M
I = A[dLlTP úYi¥V ªuú]ôhPm
= 10mA
R = ÁhP¬u ªuRûP 27 Ohms
M
BLúY C§p êu±u U§l× ùR¬k§ÚkRôp I = I – I = 10 mA – 1 mA
SôuLôYÕ U§l©û] LQd¡PXôm. R SH M
SH = 9 mA (0.009 A)
CûQ ªuRûP GlùTôÝÕm A±VôR
T¬UôQUôL CÚlTRôp A¥lTûP
NUuTôÓ

TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.10.90 - 92 335