Page 280 - Electrician -1st Year - TT

TYo (Power) T«t£ 1.8.75 - 77dLô] ùRôPo× LÚj§Vp
GXdh¬μVu (Electrician) þ ªuLm© AûUjRp Utßm Goj§e (Wiring
Installation and Earthing)

Goj§e þ YûLLs þ TReLs þ ùUdLo þ Goj ùW£vPuv ùPvPo (Earthing
- Types - Terms - Megger - Earth resistance Tester)

úSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• £vPm Utßm LÚ®Ls Goj§eÏdLô] LôWQeLû[ ®[dÏRp
• Goj§e ùRôPoTô] TReLû[ YûWVßjRp
• Ck§V RWdLhÓlTôhÓ ûUVm T¬kÕûWjR Øû\lT¥ RVô¬dLlTÓm ûTl Goj§e
Utßm ©ú[h Goj§e Øû\ûV ®[dÏRp
• RûW RûPûV HtLj RÏkR A[®p Ïû\lTRtLô] ùNVpØû\ûV ®[dÏRp.

Goj§e (Earthing) : I¡ G˜ñ£íˆFŸè£ù °Pf†´Š ðîƒèœ (Terminology)
Goj§e º¬ø Þ¼ªð¼‹ HK¾è÷£°‹.
W›è‡ì ðîƒèœ I¡ G˜ñ£íƒèO¡
ܬõ:
Goj§e¡tÏ ê‹ñ‰îŠð†ì¬õ.
– £vPm Goj§e
ªêò™ ÜŸøG¬ô (Dead): ‘ªêò™ ÜŸø G¬ô’
– è¼M Goj§e º¬ø Ý°‹.
â¡ð¶ Gô Nôj§VdÑßLs ñŸÁ‹
£vPm Goj§e (System earthing): I¡
àJ«ó£†ì ܬñŠHL¼‰¶ ¶‡®‚èŠð†ì
æ†ìˆ¬î ²ñ‰¶ ªê™½‹ èìˆFÙPu
G¬ôò£°‹.
Goj§e º¬ø¬ò ꣘‰¶œ÷¶. Þ¶
ªð£¶õ£ù ð£¶è£ŠHŸ° «î¬õŠð´‹ Gô‹ (Earth): å¼ ªð£¼œ î¬óJìŠð†ì¶
å¡ø£°‹. Þ¶ ªð£¶õ£è £vPm Goj§e â¡Á ⊪𣿶 ªê£™ôŠð´Aøªî¡ø£™
âù ÜPòŠð´Aø¶. ܶ Goj GXdhWôÓPu I¡ ެ특
Goj§e £vPm, I¡àŸðˆF G¬ôòˆF½‹, ªêŒòŠð´‹ ªð£¿¶ . ñŸÁ‹ å¼
ÕûQ I¡ G¬ôòˆF½‹ è¬ìH®‚èŠ ªuèìˆFò£ù¶ ܶ â‰îMîñ£ù ôî™
ð´Aø¶. I¡î¬ì ã¶I¡P Goj GXdhWôÓPu
£vPm Goj§e º¬øJ¡ «ï£‚èm (The ެ특 ªêŒòŠð†ì£™ ܶ ‘Fìñ£è
purpose of system earthing) GojùNnVlThPÕ’ âù ÃøŠð´Aø¶.
– î¬óJ¡ ùTôhPuμVp '0' BL TWôU¬jÕ Goj ªu ùRôPof£ ªuLPj§ (Earth
ARu êXm JqùYôÚ LPj§«u continuity conductor): ªuLPjRô EúXôL Tϧ/
ªu]ÝjRm 骫u ùTôÕ §\û] ªu NôR]eLû[ Goj GXdWô¥p
ùTôÚjÕ AjRûLV U§l©tÏ CûQdÏm ªu LPj§ûV Goj Luh¥àh¥
LhÓlTÓjÕYûR Eߧ ùNn¡\Õ. LuPdPo ECC G] áßYôoLs.
– Goj§e ùNnYRôp 𿶠ã«î‹ Goj GùXdhWôÓ (Earth electrode): Goj
ãŸð®¡ º¿ ð£èƒè¬÷»‹ â‰îMî GXdhWôÓ â¡ð¶ å¼ à«ô£è îè´, å¼
ÞöŠ¹‹ Þ¡P ð£¶è£‚Aø¶.
°ö£Œ Ü™ô¶ èìˆFò£™ î¬ó»ì¡
ªuNôR]eLû[ Goj§e ùNnRp ªu²VXôp Þ¬í‚èŠð†PRôÏm.
(Equipment earthing): I¡«ù£†ìˆ¬î A„
Goj§p 𿶠(Earth fault):
ªê™ô£î à«ô£è «õ¬ô ñŸÁ‹ èìˆFèO¡
I¡«ù£†ìºœ÷ ð°Fò£ù¶ îõÁîô£è
Goj§e ñQî àJo ð£¶è£ŠHŸ°‹
âF˜ð£ó£î Mîñ£è î¬ó»ì¡
Môƒ°èO¡ ð£¶è£ŠHŸ°‹ M¬ô ñFŠðŸø
Þ¬í‚èŠð†ì£™ ܶ«õ Goj ð¿¶
ªð£¼œèO¡ ð£¶è£ŠHŸ°‹
âùŠð´Aø¶.
º‚Aòñ£Aø¶. Þ¶ ªu NôR]eL°u
Goj§e âùŠð´Aø¶. èC¾ I¡«ù£†ì‹ (Leakage current):
Goj§e ¨ßYp ϱjR TôÕLôl× LPjÕm TôLeL°u CuÑúX`u Y¯VôL
®§Lû[ (IEC 60364-5-54) Gu\ CûQ ùNpÛm £±V U§l×ûPV ªuú]ôhPm
R[jûR TôodL T«t£Vô[oLû[ L£Ü ªuú]ôhPm BÏm.
A±ÜßjR úYiÓm.

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