Page 100 - Electrician -1st Year - TT

ii Centimetre Gram Second (C.G.S) £vPj§p EtTj§VôÏm ªuNd§dÏ Cu¥úLhPo
"Gram Centimetre (gm.cm)” BÏm. ApXÕ aôovTYo Guß ùTVo (IHP).
1 gm.cm = 1 dyne ©úWd aôovTYo (Brake Horse Power) (BHP)
7
1 dyne = 10 ergs
Gg_õu ApXÕ úUôhPôo ApXÕ Tml
Jod¡u ªLd Ïû\kR AXÏ “Erg” BÏm.
B¡VYt±u úNl¥p (shaft ) ¡ûPdÏm
iii Metre - Kilogram - Second (M.K.S.) £vPj§p
ETúVôLUô] ªuNd§dÏ ©úWd aôovTYo
CRu AXÏ “Kilogram Metre (Kg-M)’ BÏm. (BHP) Guß ùTVo.
1 Kilogram = 9.81Newton
iv NoYúRN ë²h £vPj§p (S.I. Unit) CRu BLúY,
AXÏ ‘Joule’ BÏm. EWônYôp HtTÓm CZl©u LôWQUôL BHP
1 Joule = 1 Newton Metre (Nw-M) ûV ®P IHP GlùTôÝÕm A§LUôL CÚdÏm.
TYo (P) (Power) (P) : JÚ Ï±l©hP úSWj§p
IHP > BHP
ùNnVlTÓm úYûXûV TYo Guß
AûZdLlTÓ¡\Õ. CVk§W Nd§dÏm Utßm ªuNd§dÏm
CûPúVÙs[ ùRôPo×
TYo (P) = úYûX / GÓjÕd ùLôsÞm úSWm
1 HP (©¬h¥x) = 746 Yôh
Power (P) = work done / time taken
1 HP (ùUh¬d) = 735.5 Yôh
P = F x S JÚ HP (ùUh¬d) (One HP) (Metric)
t
FPS £vPj§p CRu AXÏ Lb.ft/sec 75 ¡.¡ GûPÙs[ ùTôÚû[ JÚ ®Sô¥«p
JÚ ÁhPo çWm SLojRúYô/ CPlùTVof£
C.G.S. £vPj§p CRu AXÏ gm-cm/sec ùNnVúYô úRûYlTÓm CVk§W Nd§dÏ JÚ
ApXÕ aôov TYo (ùUh¬d) Guß ùTVo.

Dyne/sec HP (ùUh¬d) = 75kg - M/Sec
ApXÕ JÚ HP (©¬h¥x) One HP (British)

M.K.S £vPj§p CRu AXÏ Kg-M/sec 550Ib GûPÙs[ ùTôÚû[ JÚ ®Sô¥«p
JÚ A¥ çWm SLojRúYô/ CPl ùTVof£
ApXÕ
ùNnVúYô úRûYlTÓm CVk§WNd§dÏ JÚ
NW - M/ sec aôovTYo (©¬h¥x) Guß ùTVo.
(1kg = 9.81 Newton)
HP (©¬h¥x) = 550 Ib.ft/sec
Joule/sec in (S.I)
ªu]ôt\p (Energy)
1 Joule/Sec = 1 watt
úYûX ùNnÙm §\ûUûV ªu]ôt\p
ªuNd§ = VI Yôh (electrical Energy) Guß AûZdLlTÓ¡\Õ.
CVk§W Nd§«u AXÏ Ï§ûW Nd§ “Horse ApXÕ
Power” (H.P)
ªuNd§ Utßm úSWm B¡VYt±u ùTÚdÏj
aôov TYo (H.P) CWiÓ YûLL[ôL ùRôûL ªu]ôt\p (electrical Energy) Guß
©¬dLlTÓ¡\Õ. AûZdLlTÓ¡\Õ.
AûY: ARôYÕ ªu]ôt\p = ªuNd§ x úSWm
i Cu¥úLhPh aôov TYo Indicated Energy = Power x time
Horse Power - (IHP)
= VI x t
ii ©úWd aôov TYo (Brake Horse Power -
(BHP)) ªu]ôt\Xõu S.I unit “Joule” BÏm.
ARôYÕ ªu]ôt\p = (Joule/sec) x sec
Cu¥úLhPh aôov TYo (Indicated Horse
Power) (IHP) : Gg_õu ApXÕ Tml ApXÕ
Joulle
úUôhPôo B¡VYt±u Esú[ = × Sec = joule
Sec
80 TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.3.27