Page 178 - Electrician -1st Year - TT

"0' ªu§\u LôW¦ (Zero power factor): ùTôÕYôL ªu NôR]eL°p TVuTÓjÕm
ªu]ÝjRj§tÏm, ªuú]ôhPj§tÏm §\u Utßm NWôN¬ §\u LôW¦
úTv úLôQm 90°p AûUYÕ "0' ªu§\u AhPYûQ þ1p Lôi©dLlThÓs[Õ.
LôW¦VôÏm. GkR®RUô] TVàs[
Ïû\kR §\u LôW¦dLô] LôWQeLs
úYûXLs SûPùTßY§pûX. ÑjRUô]
(Causes of low power factor)
CuPd¥q ApXÕ ÑjRUô] ùLlTô£h¥q
Es[ ªuÑt±p "0' ªu§\u LôW¦ ¸rLiPûYLs LôWQeL[ôÏm.
HtTÓ¡\Õ. (Fig 1d) 1 ùRô¯tNôûXL°Ûm, ÅÓL°Ûm
CuPdNu úUôhPôoLs A§LUôL
JÚ ªuÑt±p ªu§\u LôW¦
TVuTÓjRlTÓ¡u\]. CuPdNu
Juß ApXÕ JußdÏ Ïû\YôL
úUôhPôo GlùTôÝÕm ©uú]ôdÏ
CÚdÏm. B]ôp JußdÏm
ªuú]ôhPjûR HtTÓjÕYRôp Ïû\kR
A§LUôL GlúTôÕm CÚlT§pûX.
§\u LôW¦ûV HtTÓjÕ¡\Õ.

AhPYûQ 1
£e¡s úTv ªuNôR]eL°u §\u LôW¦ IS 7752 (Tϧ I) - 1975)

TYoAÜh×h NWôN¬Vô]
Y.Gi NôR]m/ CVk§Wm CVpTô]
Ïû\kR A§L TYo@úTdPo
Yôh (W) Yôh(W)

1 ¨Vôu ϱLs (Neon sign) 500 5000 0.5 ØRp 0.55

2 _u]p YûL Ho Lu¥`]o 750 2000 0.75 ØRp 0.85
0.68 ØRp 0.82
0.62 ØRp 0.65

3 ªd^o 150 450 0.8
4 Lô© ¡ûWiPo 200 400 0.75

5 Ï°oTR]l ùTh¥ 200 800 0.65
6 @lÃNo 600 1000 0.7

2 ùRô¯tNôûXL°Ûs[ CuPdNu úRûYlTÓ¡\Õ. AR]ôp úL©s,
@To]v Ïû\kR §\u LôW¦ûV ù_]úWhPoLs, ¥Wôuv@TôoUoLs,
ùLôiÓs[Õ. ¥v¥¬é^u ûXu Utßm ¥úWuvª^u
ûXu ØRXõVûYL°p A§L ÑûU
3 ÕûQ ªu¨ûXVeL°p ¥Wôuv@
HtTÓ¡\Õ.
TôoUoL[ôp CuPdNu TÞ Utßm
LôkRYôdLm (magnetising) ªuú]ôhPm b TVuTÓjÕm CPeL°p Ïû\kR
HtTÓYRôp ©u Re¡V §\u LôW¦ ªu]ÝjRm HtTÓ¡\Õ. ÖLoúYôÚdÏ
HtTÓ¡\Õ. ªu]ÝjR Årf£ Utßm YZe¸h¥p
§\u CZl× HtTÓ¡\Õ.
4 ÅÓL°p, ª°oùYô° ®[dÏLs, LXûY
CVk§WeLs, ªu ®£±Ls Utßm c ªuNôW LhPQj§p EVoÜ HtTÓ¡\Õ.
TXYt\ôp CuPdNu TÞ HtTÓ¡\Õ.
A§L §\u LôW¦Vôp HtTÓm
Ïû\Yô] §\u LôW¦Vôp HtTÓm SuûULs (The advantages of high power factor
¾ûULs (The disadvantages of low power factor are as follows)
are as follows)
A§L §\u LôW¦Vôp ÑûUdÏ
a Ïû\kR §\u LôW¦Vôp ùLôÓdLlThP ªuú]ôhPm Ïû\kR A[®p
EiûU §\àdÏ A§LUô] ªuú]ôhPm úRûYlTÓ¡\Õ.

158 TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.5.50 & 51