Page 108 - Electrician -1st Year - TT

TYo (Power) T«t£ 1.3.31 & 32 dLô] ùRôPo× LÚj§Vp
GXdh¬μVu (Electrician) þ A¥lTûP ªu²Vp T«t£ (Basic Electrical
Practice)

ùRôPo Utßm TdL CûQl×L°p §\kR Utßm ÏßdÏ ªuÑtßLs
(Open and short circuit in series and parallel network)

úSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• ÏßdÏ ªuÑtß (short circuit) GuTRu ùTôÚs Gu] GuTûR ®[dÏRp
• Nôoh Nodëh¥]ôp HtTÓm ®û[ÜLû[ ®[dÏRp
• Nôoh Nodëh¥XõÚkÕ JÚ NodëhûPl TôÕLôlTRtLô] Y¯Øû\Lû[l ùTV¬ÓRp
• §\kR ªuÑtß (open circuit) GuTRu ùTôÚs Gu] GuTûR ®[dÏRp.

ÏßdÏ ªuÑtß (Short circuits) : ÏßdÏ Nôoh Nodëh¥u LôWQUôL Nodëh¥p
ªuÑtß (short circuit) GuTÕ NôRôWQ LWih ªLÜm A§L¬lTRu LôWQUôL
¨ûX«p Es[ ùW³vhPuvû^ Jl©Óm Nodëh úNRUûPV Yônl×s[Õ.
ùTôÝÕ éwVm (zero) ApXÕ ªL ªLd
Nôoh Nodëh¥]ôp HtTÓm ®û[ÜLs
Ïû\kR A[Ü ùW³vhPuv EûPVRôL
(Effects due to short circuit) : ªuÑt±p úRûYdÏ
CÚdÏm.
A§LUô] LWih, Nôoh Nodëh¥p
JÚ ùRôPo ªuÑt±p (series circuit) Nôoh ®û[®]ôp ùNpÛYRôp Nodëh¥p Es[
Nodëh JÚ TϧVô]RôLúYô (partial) ETLWQeLû[ ARôYÕ ªuNd§ YZeÏm
ØÝYÕUôLúYô (dead short) HtTÓYûR (Figs êXd áßLû[ ApXÕ CûQdÏm
1 Utßm 2) Øû\VôLd LôhPlThÓs[Õ. YVoL°u CuÑúXNu G¬kÕ ®ÓYÕ
úTôu\ûYLs HtTÓ¡\Õ.
CRu ®û[Yôp LPj§L°p EiPôÏm
A§LUô] ùYlTj§u LôWQUôL ¾Tt±d
ùLôsÞm Yônl×m HtTPXôm.
ªu ÏßdÏ Ñt±]ôp HtTPdá¥V
ATôVeL°XõÚkÕ TôÕLôjRp (Protec-
tion against dangers of short circuit) : Nôoh
Nodëh¥]ôp HtTPdá¥V ATôVeLû[
@lëv Utßm Nod¡ëh ©úWdLo (circuit break-
ers) B¡VûYLû[ Nodëh¥tÏ ùRôPo
CûQl©p CûQlTRôp RÓdL CVÛm.
Nôoh Nodëh-I LiP±Rp (Detecting short
circuit) : JÚ ªuÑt±p AmÁhPWô]Õ
A[ÜdL§LUô] LWihûP Lôi©jRôp
ªuÑt±p Nôoh Nodëh HtTh¥ÚlTûR
A±kÕdùLôs[Xôm. Nôoh Nodëh
HtThÓs[ CPjûR ªuÑt±p
LiP±YRtÏ Nodëh¥p Es[ JqùYôÚ
GXõùUuh¥tÏ (ªuRûPLs) CûP«Ûm
úYôph ÁhPûW Nodëh¥u êXjÕPu
(circuit source) CûQdL úYiÓm. úYôph
ÁhPWô]Õ éwVm (0) úYôph ApXÕ
ªLÜm Ïû\kR[ûYd Lôh¥]ôp, AkR
ªuRûP (elements) Nôoh Nodëh B¡Ùs[Õ
G] A±VXôm. CÕ (Fig 3)-p
LôhPlThÓs[Õ.

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