15EE4B
2 of 2
PART -B
10. (a! Explain firr fightung vsem n a suhstatinn
(b) Fxplun the cyupment ud in automatx ccntrai of substatn
Explan with ncat sketehes
Singlc bus bar arangcincn:
() Duticate hus ha atangemer:
12 Explain
(1) Tetnpralure nsc test on bus har
(n) Shrt time cuTet test on us
hat
13 Explain with a neat sketch parallel current injectien method of
testing circuit brraker 10
14. Explain the
followng tcsts on circust broaks
Line charging brcaking
(ü) Oul of phase curct test
swiiching tcst
15. Explain with ncat sketches
6) Prnary cutent injection test on relays
(ü) Secondary
curTent injecton test on relays
16
Explain tbe lest circuit usod or
)
Difereatial relays
(ü) Buchhotz relay
17. Explain the following routinc tests on
() D.C. esistance lest circuit becnkcrs
(iü) Diclectne tests
18. Explain lighting impulse tst circuit far
power trnsfores with aneat
19
Explain ih a ct sketch sketch
ransfommers utrasonic rncthod of locatson of
partial discharge in
Rrgister
Numher
VI Semester Diploma Examiaation, AprilNiay-2010
TESTING, MAINTENANCE &
CONTROL OF
SUBSTATION
Time :3 Hours | |Max. Marks : l00
Iastruction : (i) Answer any sts questions from PART - A. Aue to each questian carries
5 marks
(ü) Answer ny seven questions from PART -B Answer o cach questinn
carrics 10 marks.
PART - A
Explain the function af carhing scroen in a subattion.
2 () What is the fntion of lsolator ?
(b) List the inerlock arangsnent to prevent mal-operation of he isolator.
3. Explain mechanjcal tc on circuit brcaker.
Explain the maintcnance of ninimum oil circuit brcaker.
Explain ncoqptanoe iest nd instalation lests on retays.
6 List he scps involved in the aninlenance of relays.
7. Explain error mosurement test on curent ransformer.
Explain che typical tet cicuit genent for partinl discharge in power
trnformer.
9 Explain the functions of unit leved in asubstion.
1ef2
ISEEMH
PART -B
husbar arrangemehIs and also
lal Explan hdiagrams single and duplcate
mentin relative vantages anxi disadvantages.
(h Mentn different tyes of eletrical substutkons.
1 (al Explain tetnperalure risc lest on civuit hreakers
(h) List nutine tests on cicuit breakers
arangenent to
12. Define solatcr List the typnes uf laolaters and lst the interock
prevent mal-oporaton of lailatet.
Ihi Fplain small mductvc current hrcakes test on cireuit btcakcr.
ta) Explain with block daggam hasc rinciple uf static uver cuTCTnt rcloy
2
ib Lisi the four classes af tests on relays.
Fsplain with block diagram a digital rclay. Also, explain the twa lam1bes of
dig1tal relavs
tb) List the thrce final lests on transformers. 3
a) Explain eilng curren icst. polarity test and insulation test un transformcrs
(b) Lisi daily checks, monthly atd nual checks to be camed out for the
mainterancE uf transforner
a) Explain onlne mierupruces husod faull munitoring uf substation
th) List the fwo subsysiens of a substatiun. Explaun the desirable features of the
suhsystcms.
1 la Explain pnmary current injection test vet and socondary current Injcetion rest
Ser
tb) Stte the necesity of substation.
ta) Explain the Iayut of simple shart circuil testing station.
(h Esplan the ruks for typc tests of acircuit breakers.
19 (a) Definc partual discharge Explan the typical test circut arangement for partial
dischargc of transpeT 7
(b) Briell eplan nantetce olacuum Crcuit hrcakers.
Code : 1SEE63B
1318 Register
Numbr
VISemester Diploma Examinatlon, NovSDec.-2018
TESTING, MAINTENANCE & CONTROL OF
SUBSTATION
|Ma. Marks: 100
Time : 3 Hours |
Noe : t) Answer uny sx questions from PartA, Exh question carries 5 marks.
queston carrie 0 narks.
tii) Answer any even questons fon Part- B Eeh
PART - A
List the cSsential leatures of substalon
Define busbars Ist the types of busbars 5
Esplasn DC resistance test on eircuit brcaker.
List thc methods of indirect losting of circut breakers.
LIst the steps involved in naintenance of relays.
Explan the hasic pnnciple of directiunal uver cutrent relay
7 List the our prel1minary lent untansfomer. E:aplamrat ),polarts test
Iit the vanous types of tests 4 Ts nl eaplain er measuranen! lot n P
LINt the bas \anables relatcl with suslallon llomonng List two
clegorne of
pumrv conm an suhnlalion nd melon e cyuipments umd n uonals kntrel
uhlatun
Iof 2 Ilurn eer
Code : 15EE63B
1488 Register
Number
Exemination, AprilMay-20I8
M Semester Diploma OF
MAINTENANCE& CONTROL
TESTING, SUBSTATION
: 100
|Max. Marks
Time: 3 Hours |
5 marks.
Part-A. Esch qucstion cnris
questions from questioD carrics l0
Note : (i) Answer unyst1 questions from Part -B. Each ful
even full
(0) Answer any
marks.
PART -A
differcnt tycs of substation.
Definc subsuation. List the
and explin.
Draw the diagram of ring bus bar
expluin the layout of simple short circuiltesting station.
3 Draw and
Circutt Breake.
4 Explain maintenance of Airblast
relay.
List the various classes of test on
5
of testing af proloctive relay.
Explain primary current injection test sct
tests on trnsformer.
7 List the various preliminiry
List the vanvus typc lest on PTs.
nonitoring
List the basic variables relatcod with substation
PART -B
la) Explain duplicie bus bar arangemcrn.
(h) Explain transturmer waler spray system.
Iof 2 (Turn over
143
11 (a) Fplan temperature nse test on bus bar
har system
(b) Stale the dafference between fleshle bus and ngd bus
I2. (a) Deine isolator l the typs of tsolaor
(b) Explain Milivolt drup test on Ciruit Brcaker.
) Explmn short linc fault test on Circut Brealka.
(b) Explain capacttive current switching test on circuit brcakea.
14. (a) Fxplain Browcr Haveri's synhelic iesting circuit for testing of cincuit brcaker.
(b) Explan testing cIrcut fur diferential relay.
Is. (a) Explasn testng crcuit for Buchholz relay.
(b) Explain bastc pnnciple of statie diroctvnal over curTent relay
l6. (a) Draw the block diagram of digial relay
(b) Explan hghtening itpulse lest circuit for ransformer.
17. (a) Explatn switching impulsc lesi circuit for transformer
(b) Explain oore insulaton test and ratio polrity test on transkomer.
18 (a) Explain over voltage inter turm tet on CTs.
(b) Explain tuns ratio test on (Ts and PTs.
5
19. (o) Explan typical tost ircuit
arrangement for partial ischarge test on transforner. S
(b) Explaun on line
micro-prcesor basod faull monitory and fault locators.
Code : 15EE63B
416 Register
Number
Oct/Nov.-2019
VISemester Diploma Exnninstion,
CONTROL OF
TESTING, MAINTENANCEAND
SUBSTATION
|Maz. Marks:
l00
Time :3 Hours
question carris 5 marks
Aaswer any sis questians from PART - A. Fach question carTies
Note: (0) PART - B. Ech
full questians from
(1) Answer ny seven
I0 marks.
PART-A
components.
general subsiation and lahel the
1. Draw single line diagram of a
Lis the different types of substations. 2+3
bus bars.
Define bus bar, List the types of
maintenance ofs circuit breaker.
4 Liss the steps in general 5
Explain acceptance lests on relays. 2+3
with a ncat circuit diagram.
6 Explain errur measurement tests on CT
using CTs.
7 Explain the precautions to be aken while
of runsformer oil.
Explain the procedure for maintenance
L.ist the various tests gn PTs.
9.
PART-B
3+3
10. (a) Draw duplicate bus bar arrangement and explain.
(b) Fxplain the function of carth screen in a substation.
2+2
11. (a) Define isolator. List the types of isolators.
(b) List the tests on isulalurs.
Iof2 rTun er
15EEA3B 2 of 2
3+3
millivol1 drop test and emperature rise test on circuit brcakers.
12. (a) Expluin
brcakers.
(h) List the indirect lesting methods on circuit
S+5
circuit testing station and explain.
13. Draw the layout of a simple short
circuit nnd expluin.
14. Draw Hrown Boveri's synthetac testing
3+3
relay and explain.
IS. (a) Draw the testing circuit for Buchttolz 4
relays.
(b) List the four classcs of tess an
dugram. 3+4
Explain primury current injecion
test set with a neat circuit
16 (a)
(b) Explain repair tests on relays.
3+3
wilh circuit diagrams.
17. (a) Eplain ratin test und polurily tesl on CT
(b) List the desirable features af sub systems.
based fault monitoring with a neat block diagram. 5+5
18. Explain onlinc microprocessor
carried out for mainlenance of power
19. (a) Lit daily, monthly and annual checks 2+2+2
transforner.
(b) Explain routine lests on transformers.
