Page 229 - Electrician -1st Year - TT

«ð£¶ ༰ެö à¼A, Fø‰î I¡²Ÿ¬ø
ãŸð´ˆ¶Aø¶. Þîù£™ ð¿F™ Þ¼‰¶
I¡²ŸÁ ð£¶è£‚èŠð´Aø¶.
°Pf´èœ (Symbols): I¡ªî£N™ ¸†ð
õ¬óðìƒèO™ à¼Aèœ ðìˆF™
裆®»œ÷ õ¬ó«è£†´ °Pf´èœ Íô‹
°P‚èŠð´A¡øù.
– à¼AJ¡ ªð£¶õ£ù °Pf´ (Fig 1)

܆ìõ¬í - 1

ªu úRôWô RLWl éfÑ éNl AÛ
ú]ô V U ô ThP ùNm× ª²V
h P ] EÚ JVo Lm©
A[Ü Ï ªu ®hPm ®hPm
à¼AèO¡ ܬñMì‹ (Placement of fuses): KhPm SWG ª.Á
ª.Á
I¡Qò™ G˜ñ£QŠ¹èO™ à¼Aèœ
1.5 3 40 .12192 --
⊫𣶋 àJ«ó£†ì‹ àœ÷
2.5 4 39 .13208 --
è‹HèO«ô«ò ªð£¼ˆî «õ‡´‹. 3.0 5 38 .1524 .195
(Fig 2) ñŸÁ‹ GΆóXõp ùTôÚjRd áPôÕ. 4.0 6 37 .17272 --
5.0 8 35 .21336 --
5.5 9 34 .23368 --
6.0 10 33 .254 .307
7.0 11 32 .27432 --
8.0 12 31 .29464 --
8.5 13 30 .31496 --
9.5 15 -- ---- .400
10.0 16 29 .34544 --
12.0 18 28 .37592 --
i†´ JV¬e¡p ðò¡ð´‹ @lëvèO¡
13.0 20 -- ---- .475
õ¬èèœ (Types of fuses used in domestic wiring)
13.5 25 -- ---- .560
– F¼‹ð Lm©ûV ªð£¼ˆîˆî‚è õ¬è (200 14.0 28 26 .4572 --
Ý‹Hò˜èœ õ¬ó)
15.0 30 25 .508 .630
– úLhúW_ó õ¬è (1250 Ý‹Hò˜èœ õ¬ó)
ñÁð®»‹ @lëvûV Þ¬í‚èdá¥V õö‚èñ£è 𣻋 I¡«ù£†ìˆF¡ Ü÷¾
Þó‡´ ñìƒè£°‹«ð£¶ @lëv^£ù¶ 2
õ¬è (Rewirable type fuse) (Fig 3): Þ‰î õ¬è
@lëv³p àœ÷ ༰‹ Þ¬öò£ù¶ GIìƒèO™ ༰Aø¶.
«î¬õŠð´‹ «ð£¶ ñ£ŸPò¬ñ‚èîò å¼ F¼‹ð Þ¬í‚èˆî‚è YûL @lë³u
è‹Hò£°‹. Þ‰î õ¬è @lëvèœ Ü¬ñŠH™ b¬ñèœ (Disadvantages of rewirable type fuse)
âO¬ñò£ù¬õò£°‹. ñŸÁ‹ Þî¡ Ýó‹ð – ܬø ªõŠðG¬ô ãŸø Þø‚èƒèOù£™
M¬ô ñŸÁ‹ ¹¶ŠHŠðîŸè£ù ªêô¾‹ ð£FŠ¹ HtTÓ¡\Õ.
I辋 °¬ø¾ Ý°‹. – ªõOJ™ Þ¼‰¶ F¯ªóù ãŸð´‹
Þ‰î õ¬èJ™ ðò¡ð´ˆîŠð´‹ ༰‹ åOŠHö‹¹ Ü™ô¶ bŠªð£PJù£™
Þ¬öò£ù¶ è£gò‹ èô‰î ªê‹¹, ªõœkò‹ C¬îõ¬ìAø¶.
ñŸÁ‹ è£gòˆF¡ à«ô£è‚ èô¬õJù£™ – I¡«ù£†ì ÜFèKŠ¬ð °¬ø‰î «ïó«ñ
Ýù¶. ð£F ÍìŠð†ì à¼AJ™ àœ÷ °‹ Fø¡ (°Á‚A¬íŠ¹ G¬ôJ™)
è£gò‹ èô‰î ªê‹¹ Ü™ô¶ ܽIQò‹ – ñQîoL[ôp îõø£è «î˜‰ªî´‚èŠð†ì
è‹HJ¡ «î£ó£òñ£ù î®ñ¡ Ü÷¾èœ I¡à¼° Þ¬öJ¡ õó‹¹.
܆ìõ¬í 1™ ªè£´‚èŠð†´œ÷ù.

TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.7.62 209