Page 296 - Electrician -1st Year - TT
P. 296

I¡²ŸP¡ Mðó‹ ñŸÁ‹ Þò‚è‹ (Circuit
                                                            description and operation)
                                                            I¡ù¿ˆîˆ¬î àò˜ˆ¶‹  ¥Wôuv
                                                            @TôoUo  (Step-up transformer): ÜFè
                                                            I¡ù¿ˆîˆ¬îŠ ªðø I¡ù¿ˆîˆ¬î
                                                            àò˜ˆ¶‹ ¥Wôuv@TôoUo ðò¡ð´A¡øù.
                                                            Þî¡ ï´G¬ô ÌIÙPu ެ특
                                                            ªêŒòŠð†®¼‚°‹.  ÞRu  ùNLiP¬
                                                            AÜh×h I¡ù¿ˆî‹ Gò£¡ M÷‚°ì¡
       Þî¡  GXdhWôÓLs ༬÷ õ®õˆF™
                                                            Þ¬í‚èŠðÓ¡\Õ.
       àœ÷¶.   GXdhWôÓLs   ¸rLiPYtû\
       ùTtßs[Õ.                                             R.F.choke L:  Þ¶ èC¾  ¥Wôuv@TôoU¬u
                                                            ©ûWU¬ ûY«u¥e¡tÏ ªî£ì˜ Þ¬íŠH™
       – è‡í£® æ´ (glass shell)
                                                            Þ¬í‚èŠð†®¼‚°‹.  Þ¶ Gò£¡
       – ªô† õò˜ (lead wire)                                M÷‚°‚°„ ªê™½‹ surge I¡«ù£†ìˆ¬î
                                                            膴Šð´ˆ¶Aø¶. (Fig 4)
       – è‡í£® à¬ø Í® (glass jacket seal)

       – ªêó£I‚ è£ô˜ (ªõŠð I¡î¬ì ªð£¼œ)                       Fig 4
       Þ‰î  GXdhWôÓLs °ö£J¡ º®M™
       ªð£¼ˆîŠð†´  @lëv ùNnVlTÓAø¶.
       qLò‹ Ü™ô¶ Gò£¡ õ£» °ö£JÂœ
       GóŠ¹õ              º¡          °ö£ò£ù¶
       ªõŸPìñ£‚èŠð´Aø¶.  Üî¡ H¡ °ö£Œ
       ÍìŠð´Aø¶.  °ö£J¡ c÷ˆ¬îŠ ªð£¼ˆ¶
       Gò£¡ M÷‚°  2000 ºî™ 15000 «õ£™† õ¬ó                  ùLlTô£hPo (The capacitor C): Fø¡ è£óE
       «õ¬ô ªêŒAø¶.                                         (Power factor) ÜFèKŠðîŸè£è  ¥Wôuv
       ¨úVôu  (Neon)  M÷‚° «õ¬ô ªêŒ»‹                       @TôoU¬u ©ûWU¬ ûY«u¥e¡tÏ
       Mî‹ (Working of neon sign tube): CÕ «õ¬ô             Þ¬P«p ªð£¼ˆîŠð†´œ÷¶.
       ªêŒò ÜFèð†ê I¡ù¿ˆî‹ «î¬õŠ                            ðò˜«ñ¡ Ñ®hf ⇠2  (The fireman switch
       ð´Aø¶.  Þ¶ èC¾ ¥Wôuv@TôoU¬ù£™                        S2):  Þ¶  ©ûWU¬ Ñ®hf Eì‹
       îóŠð´Aø¶.  Ü«î êñò‹  I¡«ù£†ìˆ¬î„                     CûQdLlThÓs[Õ.  Üõêóˆ «î¬õ
       LhÓlTÓˆ¶Aø¶.                                         Ñ®hf  (emergency switch) BLÜm TVuTÓ¡\Õ.

       °ö£JÂœ àœ÷ õ£»¬õŠ ªð£¼ˆ¶ Gøº‹                        (Fig 4)
       ªõŠðG¬ô»‹ ܬñAø¶.  ªõš«õÁ                            ùU«u Ñ®hf (Main switches):  õö‚èñ£è
       õ¬èò£ù IO˜ªõ£Oˆ ¶èœ ªð£¼¬÷Š                          15A 250V  ICDP  àð«ò£AjÕ I¡²Ÿß
       ðò¡ð´ˆF ðôîóŠð†ì Gøƒè¬÷Š                             膴Šð´ˆ¶Aø¶.
       ªðøô£‹.  GXdhWôÓèÀ‚° ï´M™ ÜFè
                                                            â„.®.úL©s             (H.T.   cables):      Þ¶
       Ü÷¾ I¡ù¿ˆî‹ ªê½ˆîŠð´Aø¶.
                                                            ¥Wôuv@TôoU¬u ùNLiP¬ ûY«u¥e
       Þîù£™  +ve ions  þEm   GXdWôàm  þEm
                                                            ñŸÁ‹ Gò£¡ M÷‚°ì¡ Þ¬í‚èŠ
       +ve -‚°‹,  – ve -‚°‹ Þì‹ ªðò˜A¡øù.
                                                            ð†´œ÷¶. (IE ®§ Gi 71 T¥)
       ùTôPuμVp ÜFèKˆ¶ ÜFè Ü÷¾ ÞìŠ
       ªðò˜„C ܬìA¡øù.   GXdhWôuLs                          Gò£¡ M÷‚A¡ Gø ¸†ð‹  (Colour
       ïè˜õ ï´G¬ô Üμ‚èO™ «ñ£F                            mechanism of neon sign lamp): ÖIùv åO¬ò
       I¡ùμ‚è¬÷  ÜîQìI¼‰¶ HK‚Aø¶.                           à¼õ£‚°‹            õ£»       Ü™ô¶          ÝM
        I¡ùμ‚èœ Þ슪ðò˜„C è£óíñ£è                           I¡«ù£†ìˆî£™ õN ïìˆîŠð´Aø¶.
       åO¬ò ªõOJ´Aø¶.  Gò£¡ M÷‚A™                           Þ¬õ ªð£¶õ£è åO¬ò à¼õ£‚°‹.
       ªêò™ð´‹ I¡ù¿ˆîˆ¬î Mì  striking                       õ£»‚è÷£ù Gò£¡ Ü™ô¶  ùUodϬ
       I¡ù¿ˆî‹ 1.5 º¬ø ÜFè‹. (Fig 4)                        JüõûVl  ªðÁõŠ ðò¡ð´Aø¶.  Þ¬õ
                                                            ãŸð´ˆ¶‹ Gø‹ °ö£JÂœ àœ÷ ÝM¬òŠ
                                                            ªð£¼ˆî¶.  Gò£¡ M÷‹ðóƒèÀ‚°ˆ
       276                TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.9.80
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