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Electrical note for mechanical students
module 3
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Byllabus :- Moving coll, mowing en , chy nanometer. ype
Modute
a
Ze
Power meanacmernt vin 2p AC aysler hg -lewo-
Waihmetes. method
Neat produchen sfrem electue peaves., nduchor heating,
otelectare heceleney , mdusbiol applrenben of elcebue
icaling | meluchin feomoee , ase zferworee -
Flecfareal amnca% usu es
DS vestous eleclucel quantitees ike corvrend, vollage, pews,
eueagis, ete - ore classified av (6) inclicod vig
(i Inleqiakng ~“& (© Rewrihigy wsbuments |
Endicalvg Wisthuments diredGy velicale Value af electsicad
_ qyantity “et the tune ef © measurement |
f Q Ammeters Greasure current , Connected i seared | |
woumpeders Comeasive voltage, Comnected in -peureiel) | |
Tey propey operatien of wodicoreg webuments , 3 -loreies
7 ORL red :— |
cw Deflectng [Joperching Awxque - (Ta)
“this courses rrevement af povrler fron xenrw |
‘position de undieale vale af electsical Qquanbty bec
treasured. + ; a |
(i) Combating [reatoming ~tosque > CT) .
uf only Ta &xisks pater will move tdefenitely
+lo rnciening degtected -youitin = So Te prowded.
oppese, Ta & pointer vest at -posihon ofere
Ta= Te -
2 — spong contiol
pes — Spring
i Gravy covloct «
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(ap) ‘Dawoprg ereqne :- \
pie — peroley — Cacillates ala
Due do weata
rfiral pesthon hs makes ib obiffiealt lo fake accu \
reacting To wedece acillatins 2 bye porter to
Vest Wnmedialety learn pig rleaqua us provided
= types — aly frichen, fbuich pric & ected current
dermpig
Teomererc Megnet Mowia Cot (pone) mabument :
> Stulable fey De -measuremend onl.
> rls, prmeple :-
A current caw na ceil plaed wy a
neta zyeld Cx perames a Aeoque- This 4eque
ack ag Cael ceaane- “Teague dep ends ow
sla density BR Current Aha ouge Ke col af
_oe Geux is Constant , clorque oll be, prop otek
current . boagen We current beuy measured "
ws Aas lechrig torque. & Large cil) he he
hefQefon ef peunier- i
> Cusbuchor :- .
Kh manent magmel ides the equi
eer i aes
A welanquias 60 & wound or an eleminiinn
“fren rinse chive an Woon core placed i
We cote _ placef belucan poles of permanent megnob i
& & fPivelee] Upm Jeirel beanies Spe provides |]
Corll teagre Pampuiq teroye ix provided by scaly 1
Cenrents wodlucceel tn aluminum ~feomer. _ £
“The spool) in atatched -to Ihe cott &
oven a sak -
a
a
ce moves i
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porta - “ @
Prime inshument us connected tm a cireit bo
measure e1iRen voltage 9% current lin case of ammoler,
current lo be measured passes “hse
a cou &
tr care of volhmekr , 2 cuTrenk prepzohencs e volhage
flows thacug® col
Sne wit wb com
current & uw ploced mM
ragnehé patel, a mechanical fone ole on tb. Se
he Cet (moving aye) along ait poisler — eroves
oves gpcctucsted écale & ndheotes value of
a beng measured +
dime Aeffeeling aque oc cussent Hhscugh cid
Tad , Cama fx & cemsdaa
& for peng Conbut Te x 0,
Powrtes, wail tome +o vest when |
Tay Te
de Ext.
vot
worker
]
Pdvarteye _
> Unrform slo =
> love prwer Consumption.
> Exensin of range of he
ammela & volhmeles is
poceible* lay use | series
ZH pasallel resutevnce
- Exllanetr
Disadvantage wer
> Useps for DC only:
D> Htyb cost Han Moennig wen
Vishurnent -
Romanevd
magnet
Movie, Cock
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> Woke m He piinaple sf magnabc effect .
> Hh comsalé of a coil exedled by Voy ZT ander
meauacment® We coil & -tamasy . “the moni
ebiment va a aff (sen plate or vane
Bl iw of 2 types — Attrachas \ype & Reputsin hgpe
Misachin Tyee MZ inshuneent :-
Cousluchien +
Ho Govset of a fed CyBinclericad col An eval
shuped actt van prece is athateled fo a
Apredte 40 et Uk can move mie & aut of om
Be pewter cis cutatchad le he spindle se eRe?
soft am Pece moves ,-povnley also meves.
Aprig conbul “@ prevded & ain Pichon arp
% PRovicded: py, Alumna yan attedehed 4p
a Spendie hitch moves an a clered ae chamber.
“Thee proces cata frichon clamping.
woeakud :
Yohen Re rhument is Counedad to ~ie cryeuié,
CHrrent Alooos Hacuats Re coil Producing a 5
Mgemrelie zeit Shenalh, of ragmais etd ig
preporberct Le current Pacugh wd. “Pe
Cou athrels fo aoft Wen “pace & Povnlea,
attched 5 ScH tom Pece Moves Yoon xcre
Pee 2 cUrechin vewsrses | leech af
magnates etd rreuesstes Jou Aivrecha. of Aete torg
clexque wemane 4h, dame
Se he webumant Gam be wee! on ne Rte.
MM thud Wasdbumend Tae rt
5 K Tex 8 (sme Shang. corhoe
Romten ternes Jo ret hin ye Te soe
Sxirz
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a)
it efector a priler-e & square of current “
So sale 4s unifi Yvornten
wT 7 aie
charley oft otlatehod)
: ous vare-
Bley pad yi
q (as
Mov
a
~ a mens Repalaion ope —
pulsion Wyre Ma -tusdumenb :-
Conshucher -—
Se Aspalsin 19 Aol tor pacer / vanes ove
woe Prmunee) with ti spiced corrinb Corsi Gil
LL cybnceniat shellow cel cassug current undlen
easurement -
Out of the 2 soft irom peoos one us ered &
offen = is. mmovelle - Fixed vane 15 wedge shaped
A attatched -t0 sterbmany eit» Movi vane ws
cylindeneal & Imaunted on a repndle -lo whieb
Pomier iw alledeled- Sprig coubul & an fiicbor
damprg 48 used .
boeofena
Wher I under measusement oy LT due to V
cinder -measwament Yflouss vcugh “Ie coil &
ud a et up “his vnagnetce peut
mogredises Re Q vanes same lurch. Go Me
A vanes repel each othon. Movabie vane AegCecks:
& Causes porter ‘lo move
When TyeTe, Power cons to -vesb .
Ub ao be wed or bol ac veo MLAs Usemenbe.
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ae poner
} 1 - aniefom:
Cx i?
dine sale &
Adluumtages of wulument
c
> Cheap & oe bus
2 crwtead we (bolh he SPC measurement )
~ tlgh tosque jo wey roto
baadveumleg ¢
> Nen = eundeern scale
> dan cored ctl us So edcly current &
lyse resu Upes occu 6
usec
Dynarmomeler Tyre Tshuments 1
ane commomly used -to
i cacae “ype ansburents
dn pe Citeuit Pwr quer 4 PeVz
Measure put
Pe vIoos
% Bn ac cea pores U quer by
where Vo vollage aersss Dood, I ts cervent acu? Leos
&@d v Re arg. belweens Lottlage & cursant -
Lasbument ured fo nneasuare. power, te cxarttmelen SO
caver ; of epeichmn us that a, amechemdal force
‘ ween 2 Curent « ev
=a nrent caasyengy Conductors cr cudt
> Ik consis of 0 Fuad coil & Wevind coil. Fixed coil
es connected un Acree wilh Qoacd QB carses Load
ousaontt Uo is Called current ew
Mowwy Gott 48 connected acres: load trough
denes mulbplien R “3 *
QR ame coment ¢ fs
Ta preposbanal to
Lod vou Vu a
4k Called
5 Heae. ; qolerhad cow .
Conbsl erqve is Provided by 2 Spiel kpaings
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~feenchin. of ead oe
cow “
‘4 U3 week
te moving cott
th
| ;
5
calle
N
[4 —fixed coill
j— Mowng wil
iM gg
2 = {i
y
Uoealeena :-
When comredted to a chet to mnicate peer
Conaumed by a Wwod, curren ceil Grows Lewcl current
& retook Coit Carnes current prpohonet No Qed)
Vollege Due -lo Tin bad ~Ie Coby, a ~prce exicls
hehwen hem & movie, Col moves povoky ever a
stale. ‘a
When Te= TL ,poirter comes Jo resi Collen 1 Yewrses,
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C1) Beth ac & de an be cmecsred, 4
current tis both dhe coils meverse - So clirechen of
defteclog Aexque Romans 4eame - Be bolh acl ad
bower aun be moaswed:
We Pe cweee ST a a dy
Ty av .
TAX VE, ue Lewd power
In Ac ewctuk t- Ty vacas & ood power
AL Sealy slate © Wee
where Te © Humic pow coubul,
se © x lead power
Hones clewee Ras une{par / meat Beale
a) Me Cored Coie ane used Bo mm edly current
os tuyskreses Qos
Dieduchage \
Chow seaque ste weigh Fado .
Gi) Expensive Than Pmmc & mt inshunment -
Oo
Rewer Measurement vo Ac Ayslers by D-coatine (ey
Melhock :-
Fewer in ap De sigilern ie geben by
Actwe powen, P- VB VD costp
Reactive power, Be YAY, sing.
Cohee VAT dre Lue voltage & current
Crespectvety & fe i the angle Rie phase vollage &
Currel
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ein Sb AC ayplen am be measvawd by
Q wattmaler melfed «Ik uses 2 wethnelor’.
coils
_
Guide, a balanced ap aystem he cirnont
of 2 ante ae wserled in any o§ the lwo
Dinos & pressae cous a2 comnecled +e Line
Cotta cument coil
Veckrr am fow balariad stor conned Load |
Cwiduelve Qead) 4s ARown below
Mis Ma, Vg cae place vollages Vz ,Va3 & Vig ane
oF Qe volleges- Ug = Vas= Vas W..
Prstuming Sead is Unduchve , phase counts 7), 1 22,
lag lachind VV, & Va ky anagtes ob, , by &
espectwely. Fer balanced Dead, dye dye ¥se >.
We have, ‘
Wee Vg f, cos'(30-4) = VT Ws Go- 4)
@ °
“= Veg Ty cos (20th) _ WIL ws(s0+d)
Sum of coadtmeles. vreadings :
BFW, = VT, Cos (30-p) + VET COR (30 +>)
2 NE. [cos (0-4) + Cos Gord]
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Pe Wty,
Also wba = Vode [c8Go~ -4) — (08(204 9) [asinasinb
v3 vase = B (W~ 42).
@-
We Save
Se pruwer factor, cost = aula (acest
ay
¢ = 4an? ereor |
avd a cord Ccos3c? = fo)
= Vay TGesp = Netve fewer,
———— <
2ee3a cosh oy
( Afwsa (a-b)-+ Counts)
P. (cuads?
= Cet (ach) —
— oO LT sie2o sunt Costasy) |
= VWI_sind C303 =
(Bly) _ av, Tesi
Wy Wo oe
Vay ticosd |
Gepley
oF Wy
fe a
S ange bo Va
x, 860-9) :
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