Page 301 - Electrician 1st year - TP

TYo (Power) T«t£ 1.10.92
GXdh¬μVu (Electrician)þ JüõëhÓRp (Measuring Instruments)

£e¡s úTv G]o_õ ÁhP¬p HtTÓm ©ûZLÞdLôL úNôRû] ùNnRp
(Test single phase energy meter for its errors)
úSôdLeLs: ClT«t£«u Ø¥®p ¿eLs ùT\ úYi¥V §\uLs
• G]o_õ ÁhP¬p FoRp ©ûZûV LiP±Rp
• G]o_õ ÁhP¬u ÕYdL ªuú]ôhP ©ûZLû[ úNôRû] ùNnRp
• G]o_õ ÁhP¬p ©ûZLû[ ¾oUô²dL ùTôÚjRUô] ªu TÞûY úRoùRÓjRp
• G]o_õ ÁhP¬u NR®¡R ©ûZûV ¾oUô²jRp.
úRûYVô]ûYLs (Requirements)

LÚ®Ls/NôR]eLs/CVk§WeLs
(Tools / Equipment)

• ªuNôW T¦Vôs LÚ®Ls • £e¡s úTv ®[dÏ TÞ
ùTh¥ 1 No. 240V 50 Hz 1.25 KW 1 No.
• £e¡s úTv G]o_õ • BhúPô ¥Wôuv@TôoUo
ÁhPo 5A 240V 50 Hz 1 No. 240V 50 Hz 0-270V 8 Amp, 50 Hz 1 No.
• úYôph ÁhPo 0 - 300V M.I. 1 No. ùTôÚhLs (Materials)
• AmÁhPo 0 - 5A M.I. 1 No.
• §\u LôW¦ ÁhPo • ªu®[dÏ úaôpPÚPu
(Power factor meter 240V 5A 50 Hz) 1 No. 5W 240V 1 No.
• AmÁhPo M.I. 0-50 mA 1 No. • PVC Lôl©PlThP úL©s
• £e¡s úTv ùLlTô£hPo 1.5 sq. mm 250V ¡úWÓ 10 ÁhPo
úUôhPôo ©úWd TÞÜPu
240V 50 Hz AC 1/2 kW 1 No.

ùNnØû\
G]o_õ ÁhP¬u Esú[Üs[ ©ûZûV N¬ ùNnYÕ ClT«t£«u úSôdLUpX.
Hù]²p, CRtÏ ®ûXÙVokR NôR]eLs, ϱlTôL rotating sub-standard meter
ØRXõV] úRûYlTÓm. G]úY ÑXTUôL ©ûZûV LiÓ©¥dLlTÓm Øû\
CeúL RWlThÓs[Õ.

ùNnV úYi¥V úYûX1: FoRp ©ûZûV (creeping error) LiP±V ªuTÞ CpXôR
úSWj§p G]o_õ ÁhPûW úNôRû] ùNnRp
1 Fig 1þp Lôi©jÕs[T¥ BhúPô
¥Wôuv@TôoUo Y¯VôL G]o_õ ÁhPûW
CûQdLÜm.
2 G]o_õ ÁhPÚdLô] Cu×h
ªu]ÝjRjûR 80% ØRp 110% YûW
Uôt\m ùNnVÜm.
JÚ G]o_õ ÁhPo ªu]ÝjRm 240
V BL CÚkRôp Cu×h
ªu]ÝjRm B]Õ 192 V ØRp 264 V
YûW CÚdÏm. ÁhP¬u ¥vd
ÑZÛ¡\Rô ApXÕ CpûXVô G]
LY²dLÜm. LiLô¦dÏm úSWj§p
TÞûY CûQdLd áPôÕ. ApXÕ
TÞÜdLô] Ñ®hfûN ‘off’ ¨ûX«p
ûYj§ÚdL úYiÓm.

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