Page 315 - Electrician -1st Year - TT

ªu A[dÏm LÚ®L°u YûLLs þ Cu±VûUVôR ®ûNLs MC Utßm
MI ÁhPoLs (Classification of electrical instruments - Essential forces, MC and MI
meter)
úSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• I¡«ù£†ìˆFù£™ è¼Mèœ Þòƒ°‹ Ü®Šð¬ì õ‹, ÜõŸP¡ ܬñŠ¹
ñŸÁ‹ I¡«ù£†ì‹ ð£ŒõFù£™ ãŸð´‹ M¬÷¾è¬÷ ÜPî™.
• I¡ Ü÷‚°‹ è¼Mèœ Þòƒ°õ «î¬õò£ù M¬êèÀ‹ ÜõŸP¡ õ¬èè¬÷
ÜPî™.
I¡ Ü÷‚°‹ è¼Mèû[ W›‚è‡ìõ£Á Ü÷MìŠð†®¼‚°‹ è¼MèÀì¡ åŠd´
HK‚èô£‹. ªêŒòŠð†´ Ü÷¾èœ °P‚èŠð†®¼‚°‹.
– îò£KŠ¹ º¬ø ñŸÁ‹ îó‹ ðEèœ (Functions) : ùNLiP¬ è¼Mèœ
– ªêò™ð´‹ Mî‹ ªêò™ð´º¬ø¬ò‚ ªè£‡´ Í¡Á
– I¡«ù£†ì‹ ð£ŒõFù£™ ãŸð´‹ õ¬èè÷£™ HK‚èŠð´A¡øù. ܬõ 裆´‹
M¬÷¾ è¼Mèœ, ðF¾ è¼Mèœ ñŸÁ‹
îò£KŠ¹ º¬ø«u RWm (Manufacturing JÚe¡ûQl× è¼MLs.
standards): I¡ Ü÷‚°‹ è¼Mèœ ðó‰î 裆´‹ è¼Mèœ (Indicating instruments):
«ï£‚°ì¡ îò£KŠ¹ º¬ø¬ò‚ ªè£‡´ îó‹ Þšõ¬è‚ è¼Mèœ Fig 2-™
HK‚èŠð†´œ÷ù. ܬõ ØÝûUVô] 裆ìŠð†´œ÷¶. Þ¬õ Ü÷‚°‹ I¡
è¼Mèœ ñŸÁ‹ Þó‡ì£‹ õ¬è è¼Mèœ. Ü¿ˆî‹, I¡ æ†ì‹, Fø¡ ÝAòõŸ¬ø
ØÝûUVô] A[dÏm LÚ®Ls (Absolute ñFŠ¬ð Ü‹e†ì˜, «õ£™† e†ì˜ ñŸÁ‹
instruments): Þ‚è¼Mèœ Ü÷‚èŠðì õ£† e†ì˜èO™ Ü÷‚èô£‹. 裆´‹
«õ‡®ò Ü÷¬õ Mô‚般î (deflection) è¼M‚° Þ¬õèœ àî£óíñ£°‹.
ªð£Úˆ¶ Ü÷M´Aø¶. à.‹. «ì¡ü¡† Fig 2
裙õ«ù£ e†ì˜ ðìˆF™ è£íô£‹.
Þšõ¬è‚ è¼Mèœ îóºœ÷ ðK«ê£î¬ù„
꣬ôèO™ ðò¡ð´A¡øù. (Fig 1)

Fig 1

JÚe¡ûQl× è¼Mèœ (Intergrating
instruments): Þšõ¬è‚ è¼Mèœ å¼
°PŠH†ì «ïóˆFŸ° ñ†´‹ I¡²ŸP™
𣌉¶ ªè£‡´ Þ¼‚°‹. I¡ê£óˆ¬î
ùNLiP¬ è¼Mèœ (Secondary instruments): ñFŠH´‹, Ý‹Hò˜ ýõ˜ e†ì˜, A«ô£
Þšõ¬è‚ è¼Mèœ Ü÷‚èŠTì «õ‡®ò õ£† ýõ˜ e†ì˜ Þ àî£óí‹.
I¡ Ü÷¬õ I¡ Ü¿ˆî‹, I¡ æ†ì‹ Fig 3-™ A«ô£õ£† Üõ˜ e†ì˜
Fø¡ B¡VYtû\ Mô‚è º¬øJ™ LÚ®J™ 裆ìŠð†´œ÷¶.
裇H‚°‹. Þ‚è¼MèO¡ Ü÷¾
ðF¾ è¼Mèœ (Recording instruments):
ØÝûUVô] è¼M Ü™ô¶ ãŸèù«õ
Þšõ¬è‚ è¼Mèœ ñFŠH´‹ Ü÷¬õ ðF‰¶
TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.10.83 295