Page 116 - Electrician -1st Year - TT

TfûN, BWgÑ Utßm ReLm Gu\ôp, PôXWuv A[Ü (Tolerance value): SôuLôYÕ
ThûP ªuRûPGpûX«u EiûUVô]
ªuRûP«u A[Ü 27,000 Kmv ±5 NR®¡Rl
U§l× ARtÏs APeÏm. úUtLiP
©ûZ.
ERôWQj§p PôXWuv ±5% BÏm. ±5% of
ØRp 2þYÕ 3þYÕ 4þYÕ
27000 = 1350 Kmv. G]úY ±5% GuTÕ 28350
¨\m ¨\m ¨\m ¨\m
Kmv ApXÕ 25650 Kmv CWi¥tÏm
£Ll× FRô BWgÑ ReLm CûPlThPRôÏm. Ïû\kR PôXWuv
3
2 7 1000(10 ) ±5% ùLôiP ªuRûP«u ®ûX NôRôWQ A[Ü
ùLôiP ªuRûPûV ®P ®ûX A§LUôL
CÚdÏm.
AhPYûQ 1

UôßThP YiQ ϱÂÓ Ï±l× TPj§u A[Ü Utßm PôXWuv
¨\m ØRp CWiPôm êu\ôm SôuLôm
ThûP/ ThûP/ ThûP/ ThûP/
×s° ×s° ×s° ×s°
ØRp CWiPôm ùTÚdLp Htß
Fig Fig LôW¦ ©ûZ

ùYs° — — 10 -2 ± 10%
ReLm — — 10 -1 ± 5 %

Lßl× — 0 1 —
TÝl× 1 1 10 ± 1 %
£Ll× 2 2 10 2 ± 2%

BWgÑ 3 3 10 3 —
UgNs 4 4 10 4 —
TfûN 5 5 10 5 —

¿Xm 6 6 10 6 —
FRô 7 7 10 7 —
NômTp 8 8 10 8 —

ùYiûU 9 9 10 9 —
GÕܪpûX — — — ± 20 %
Ïû\kR Utßm SÓjRW U§l×s[ ªuRûPLû[ A[jRp (Methods of
measurement of low and medium resistance)

úSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• ªuRûP«û] A[dÏm TpúYß Øû\Lû[ áßRp
• AmÁhPo Utßm úYôph ÁhPo êXm ªuRûPûV A[dÏm Øû\Lû[ ®[dÏRp.

ªuRûPLû[ A[dÏm Øû\Ls (Methods (Comparison of unknown with standard using potentio-
of measuring low resistance) : Ïû\kR[Ü meter)
ªuRûPLû[ A[lTRtÏ ¸rLiP SôuÏ • ùLp®u ©¬hw (Kelvin bridge)
Øû\Ls TVuTÓjRlTÓ¡u\]. • `uh YûL Km ÁhPo
• úYôph ÁhPo (Voltmeter) Utßm AmÁhPo Utßm úYôph ÁhPo Øû\
AmÁhPo (ammeter) Øû\. (Ammeter and voltmeter method) : Aû]jÕ
• ùR¬kR U§l× ùLôiP ªuRûPÙPu Øû\L°p CkR Øû\ ªLÜm G°V
ùR¬VôR Juû\ Jl©hÓ LiP±Rp Øû\VôÏm. CmØû\ Ïû\kR[Ü ªuRûP

96 TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.3.33