University of Mumbai 2007-8th Sem B.E Electrical and Electronics Engineering Design & Estimation of Electrical System - Question Paper
Con/2746-07.
4- i g/xd -
a c
N.B.: (1) Question No. 1 is compulsory.
(2) Attempt any four questions from remaining six questions.
(3) Assuma suitable data wherever required.
(4) Figures to the right indicate full marks.
|
1. (a) Following are the details of connected electrical load for a particular plant: | |||||||||||||||||||||||||
|
For the above system:
(i) Draw the single line diagram showing location of loads metering devices and various protecting devices and their ratings.
(ii) Calculate KVA rating of transformer required for loads.
(iii) Suggest KVAR compensation required for any load and calculate the KVAR required for the compensation.
10
10
(a) Explain the tendering process in detail.
(b) Write a short notes on -
(i) Energy efficient motor
(ii) Cable Installation.
State the design considerations for lighting a reading room with dimension (50m (t) + 20 m(b) + 5 m (h)).
3.
8
4
10
10
10
6
4
Calculate the no. of lamps required.
Draw the lighting layout.
(a) Explain different drawings in Electrical system.
4.
5.
(b) Discuss the discrimination and coordination in protection.
(a) Write a detail note on type of batteries, sizing and selection criterian.
(b) Discuss the terms QAP, WBS and logistic with respect to project planning.
(c) Define the terms -
(i) Load factor and
(ii) Diversity (actor.
10
10
20
(a) What are the different types of distribution system and their selection criteria.
6.
7.
(b) Explain the need of Energy Audit and its different types.
Write short notes on (any three):
(a) SCADA
(b) Security system
(c) VPS
(d) Eleveters.
********
_ T>ata for Iflmnination Design problems fy*' *
|
Coefficient of Utilization Chart | |||||||||
|
K. |
Rc0.7 |
Ro-0.5 |
Rc*0.3 | ||||||
|
*w=0.5 |
Rw*0.3 1 Rw0.l |
Rw-0.5 |
RwOJ |
Rw0.l |
Rw-OJ |
Rw-0.3 |
Rw-0;1 | ||
|
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 . . |
0 % |
|
0.6 |
0.43 |
0.39 |
0.36 |
0.42 |
0.38 |
0.36 |
0.41 |
0.38 |
0.36 |
|
0.8 |
0.45 |
0.41 |
0.38 |
0.44 |
0.40 |
0.38 |
0.43 |
0.40 |
0.38 |
|
1.00 |
0.51 |
0.47 |
0.44 |
0.55 |
0.47 |
0.44 |
0,49 |
0.46 |
0*40 |
|
1.25. |
0.55 |
0.51 |
0:49 |
0.53 |
0.50 |
0.48 |
0.52 |
0.50 |
0M |
|
1.50 |
0.57 |
0.54 |
0.52 |
0.56 |
0.53 |
o.5| |
0.54 |
0.52 |
0.50 |
|
2.00 |
0.61 |
0.58 |
0.56 |
0.59 |
0.57 |
0.55 |
0.57 |
0.56 |
0.54 |
|
2.50 |
0.63 |
0.61 |
0.59 |
0.61 |
0.59 |
0.57 |
0.59 |
0.58 |
0.56 |
|
3.00 |
0.65 |
0.63 |
0.61 |
0.63 |
0.61 |
0.59 |
0.61 |
0.59 |
0.58 |
|
4.00 |
0.67 |
0.65 |
0.63 |
0.64 |
0,63 |
0.62 |
0.62 |
0.6! |
0.59 |
|
5.00 |
0.68 |
0.67 |
0.65 |
0.65 |
0.64 |
0.63 |
.0.63 |
0.62 |
0.61 |
|
Lamp Data | |||
|
Sr.No |
Tvr* of Lamp |
Wattage |
Lumen output |
|
1 |
CLS |
25 |
230 |
|
t |
40 |
415 | |
|
. |
60 |
710 | |
|
IQ0 |
1340 | ||
|
200 |
3000 | ||
|
% |
Tungsten Halogen |
50{Miniature Dichroic) |
900 |
|
300 |
5100 | ||
|
500 |
9000 | ||
|
1000 |
22000 | ||
|
3 |
Fluorcsccnt (T8/T5) |
18(Hafo phosphate) |
1015 |
|
36(Halo phosphate) |
2450 | ||
|
18 (82/84/86) |
1300 | ||
|
36(82/84/86) |
3250 | ||
|
280*5) |
2800 | ||
|
4' |
CFL |
9 |
600 |
|
1! |
760 | ||
|
13 |
920 | ||
|
18 |
1200 | ||
|
DSfrVi- f3->4>' t\}C?OS ISVI&N MUiUsN m fO*_ -non3 |  |
Sis
m
*11 S 5J o m
00090 OOOOOOj
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s'tfcss
5$
ci
 |
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|
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|
S | |
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afefcig g&28 382 225J2
ooooooooo ooooooop
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ssis'ss ante's sss5 aaai
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hfcSS2i2ai3SSSS': 1
xf
> 1EH-Table 9D2 , . , ,
luteflailon melhod K of Fig. 1 (Oellnad condUoDi) >
O
installation mathod* E to H ol Fig. I (Clipped direct')
' installation methocs A to C tof Fig. 1 CEftClosetf).
.-ass*
......ifprol#clH
cpnoucuw
Qrto Tivin,cable With. or wiUvoul
.....TjQtpr
Ona ttirop-cora C*We with or witfiovt pioKKiw* conductor or oai Jour<or# catU. truaa pha*
;*$S
10*10/
One Twin cabU With or withpyi ixowctiv* conou<
iaSX1
Ooo lhup-C c*bo with wilTxut p<oifr conductor or one loufco'# caWe,
;ora
or
tv>%n ceti* or
tVJUC
u
Co'idudot C<9> , MCtlMl
via
wt
pfOl
lor
Ao>tdwe eo>v9< inQlo*pn*s< *.. or c.c.
touf'Cor# cat. thraa phi**
"*-w~
IS?
ampere
nfiSa
13
[yctorof' w.-tCf8 C3l .
three phass
Curffrvl Vofi ca/rvmo urop
ar&era
9
Cofffnl JJ* canning d'op
A,
JSi.
6 7_
Cwffnl
j>aP Curraw j8?r# SJn&i?
moire 11
mV
/ywg rap *
Currant car. cep
carrying
capacity
8
spg jsr
Curront
carrying
capiciy
arffpera
nSSa
5
|
pe/o pr awtra 3 | ||||||||||||||||||||||||||||||||||||||||||||||||
|
|
12 | ||||||||||||||||||||||||||||
|
il
A
1
mm1
ID
ii
|
n>V | |||||||||||||||||||||||||||||||||||||||
|
mV
42
20
17
II
7.1
4.2
2.7
II
8:11 0.40 0.32 0.29 0.25 0.23 JL2L
|
!W m |
1:? 0.92 | |
|
m |
m | |
|
306 |
0.40 |
0-36 |
|
34ft |
0.32 |
0.25 |
|
400 |
0.29 |
03 |
|
474 |
0.25 |
0.18 |
|
546 |
0.23 |
' .0.14 |
|
632 |
9,?2 |
0.11 |
$
120
150
185
240
XO
M.
CORRECTIOM FACTORS
2S*C WC I.M 0.94
6SC $0*C 65*C 0.61 0.S0 0.35
<0*C 45*G 50*0 0.87 0.79 0,71
FOR AMBIENT TEMPERATURE AmbtaiU (anporiuro Correction toctor
TABLE IS lEE-Tablo 9D3 * . ,
curfeni.carrvinn capacities and associated voltage drop# for twin and
muUicoro armoured p.. -plated c,b,., (copp.r conduo.cr
InslaCitkwi matficd K ofTaWa 11 fOaflned coftdMoni*)
Ins aftetfon method E, F end G t ofTaUe 11 fClbpod djrocf)
Ona thraa * or* Jour core cabla threephasa
One twin cable alngla phasa b.c. or dc.
Ona thro or* four core caWa throo-phasa
One iwin wb!o singto ptoso a.c. or d.c.
CofwJucW
CfOll
WClional
a/aa
Currant Volt drop
carrying parampere
capacity permelra , 8 9
Vol tdrop perampeia permotra 7
C'irrant
ccr.Tinj
capacily
6
Nfoltdrop-pbr ampere pof maira 6
Current
carrying
capacity
4
Volt drop
peramporo
per rrwUe 0
Cu/ront
cerryinfl
capacity
2
mV
mV
mV
2$
16
9.0 6.3
3.8
f:i
1.1 0.61
| ||||||||||||||||
|
fOfl AMOiENT TfMPERATUnE Ambiont lemporaluro Corfocbon faOor |
A 18 24 31 41
56
73
97
119
147
6.3
3.8
2.3 1.6 1.1 0.61
42
56
77
102
125
155
|
SO > | |
|
69 | |
|
90 | |
|
121 | |
|
149 | |
|
180 | |
|
a.e. | |
|
220 |
0.65 |
|
270 |
0.48 |
|
310 |
0.40 |
|
355 |
0.32 |
|
410 |
0.29 |
|
485 |
0.25 |
|
550 |
0,23 |
|
620 |
022 |
7.3
4.3
2.7
1.8
1.3 0.92
d.c.
0.64
0.46
0.36
0.25
0.23
0.18
0.14
0.11
0.57
0.42
0.34
0.23
0.24
a2o
0.18
0.17
190
230
270
310
350
420
475
550
0,57
042
0.34
0.29
0.24
0.20
0.10
0.17
160 219 257 ' 295
333
S23
CORRECTION FACTORS
5S#C 60*C 65'C
0.61 . 0.00. 0.35
60*C
0.71
4$*C
0.70
40*C
QjQ7
<7 iKE.Ttbtc 9H2
I.I Aclatod voM*drop?*w M'C or 1S0*C rubbor*lnuUV>d ffcxlblo eabloa . CurranVcarrylnu eapacllto* and a*oclotoa von crop Oonduew opoiaUng tampMauii*: 75*C
UoUs drop par impcrapy metre
Cu/runl<oyino cjppcny
d.c. SAQl*pha*o*re, Tbrea-phaw a.c.
WjWfTU.TI
oia#\oi(W of wlies torivrj eo(v>j*lnr 2
NomtnA)
CfOM
tclions>
araaaf
conduct
1
Th/oo*phaso n.c. (ono Huee.tour. or hvoeorscaWa
S
mV 41.5 72 4 2 2.6-1.7 1.2 035 0.61 0.47 ass
0.31
0.27
0.22
0.-19
mV
13.0
7.9 4.6.
2.9
1.9 1.3
0.95
0.63
0.53
0.43
0.36
0.32
0.27
0.24
0.21
oio
aid
mV
13.0
7.9 4.6
2.9
1.9 1.3
0.93
065
0.49
0.36
0.3!
026
0.20
0.16
0.12
0.10
0.08
A
34
44
60
61
105.
125
160
195
235
270
305
350
405
470
A
40
51
70
93
120
145
185
225
270
DOS
355
405
465
530
630
720
630
mm
C.3I
C3i
C-41 C.41 C.41 C.41 <.41 Ml 0.51 0.51 0.51 0.51 0.51 0.51 0.51 0.6% 0.61
65C 70C 0.44 0.3*
60C
0.54
|
35*0 |
40*C | |
|
0.93 |
0.66 | |
|
35C |
100*0 |
106*C |
|
lo 95C 1.0 |
0.94 |
0.66 |
65*C
0.63
6CfC
0.72
45C
0.80
110*C 115*C 120C 125*0 130*0 Wt*,140*0 0.02 0.77 ,.0.71 , 0.84,. 0.56 0,4.6 03?
WV ",,r
CORRECTION FACTOR FOR AMUIENT TEMPERATURE 61*0 rvbboMnsilod cablos Ambiortl lempawtjro CcrrccUOM factor J5CPC iut?bor.lnsUa'.fid cabUw Ambiont wmpeiatura
Corractton factor _ .....
0.C. 01
a.c. (on* IwM coble, with of wiincul earth* con*.im)jly conductor, or l'vo aingiacof* cpbitf bunchad)
3
mm*
4
5 10 16
SI
50
70
IS
120
153
189
249
900
400
900
630
TABLE 19
|
|
|
-rtd isjociatod volt urops JhodumlnaraMn.ulatod cable. (eop;> condufiiora.and ahaath) Curnl-c*rry(nB capaclU.. IpoMd t0 louch w Klng .n ov.r.U cov.rtn, t MlhoMra,lno.PW,to.:70-C |
 |
I4>h. 3/pru t.ewor ae.* d.t
;.:60*C
a4*
0.51
s&cy
>0X8,-
07?.
40c
045
0.94
35*0
1.0
1.1
2S*C
1.06
1.19
for AMBIENT TWPfUTURE
Ambi*nll*fWaui k
&[ EE ESSE SSJJ-i3?. ~*Q
vr A>*oi in
Con/2746-ND-8228-07.
ft fc-sb'ta.1 wT
'hj >0-
1PP.T*h1n 9K1 .....
u j-anftrliloi and nssoclalocfwlliflo drop* fo; slnglo-coro P.v:?}pa$nted cablaa, Currant-carrying ourod. wllh thth <Atumlnium co/KtoctgnJ lampBfB,ufe ; 70y
InataMon methods 6 lo H of Table 11 fCtiooeddrecti
Inslalatlon method J otW>la t \ (Oalined condili&AS >
Uuia Ration methods A to C to< _Table 11 fndosod')_
|
9 riMn ilnsle* 3 of 4 cable* ttwwpliaM u 2 CobUu, slngla-phase *.c.s of d.c. Fll of! vrticsl (2cabte*. alngja- Kgfe 4 &SS& VW drop per mpere* ' d.c. ~~ |
 |
|
9(0 0.38 0.23 s'0.39 435 0.25 564 045 0.19 0.37 4&0 0.22 677 0.32'* 0.15, 0.34. ; 570 0.20 776 030 Q.12,.0.33 ; ft4B s |
3 or 4 cables UtffiO'phSM o-c.
CfOM *eclion*J area ol conduct**
carrying wnpwa
p.dV hJ*
|
2 |
a.c. 3 |
dx. 4 |
5 |
|
A |
mV |
mV |
A |
|
60 |
4.5 |
4.5 |
52 |
|
78 |
2.9 |
2.8 |
67 |
|
96 |
2.1 |
2.0 |
63 |
|
120 |
1.6 |
1.5 |
100 |
|
150 |
1.2 |
1.0 |
125 |
|
175 |
0.03 |
0.75 |
t50 |
|
205 |
0.00 |
0.60 |
175 |
|
235 |
0.73 |
0.49 |
2W |
|
- | |||
|
* | |||
|
. | |||
|
- | |||
|
.* |
B
47$ 0.29 0.23 419 0.30
564 0.26 0.19 465 Wl
643 0)23 atS 641 0.26
737 0.21 0.12 616 024
CORRECTION FACTORS
40*C 45*C 5C*C 55*0-6057 WC 0J$7 0.79 0.71 051. it00.0J5
FOfl **5USR5S1B5.
Correction f*ckw
25*C 35 1.06 0.94
TABLE 21 lEE-Tabla 0K2 ,
Currenlrrving capaclo3 Dnd a3SOC|Mod vHago dro|(arJwtn
multlcora armoured p.v.c. -Insulated caoios, non armou i. Conductof 0p0,atlng lemparaluro
70*C
tnslaflalion mtlhod K b! Ta&8 11
fCWfirwd con Scons') _'
1
One three * or- four coreoatte, three-phase"r
Irslaflalion motfwd E, to H t of Table 11 (C#p?o<J direct)
Conduc
ts
erca
8ocuonai
area
On twin catto, single phase a.e.ord.e.
One throo - or* Four core caSlfl, Ihroo-phaae_
Ooo twin cabto single phase a.?, or ilc_
Volt drop par ampere por metre 8
Currant'
carrying
capacity
a
\Aplt drop por ampen par melra 7
>' Curront tarrying' capacity 6
Volt drop por ampere por metre 5
Current
carrying
capacity
4
VtoS drop per ampere par moire 3
Current carrying capacity 2
|
mV |
A. |
.v |
|
4.5 |
55* |
9.9 |
|
2.9 |
74 |
2Jb |
|
2.1 |
91 |
t* |
|
1.5 |
110 |
fr3 |
|
1.1 |
139 |
1 0.93 |
|
0.79 |
172 |
0.66 |
|
, 200 |
0.54 | |
|
227 |
0.45 | |
|
..260 | ||
|
. |
31* |
" .059 |
|
- |
359 |
I ':(U5 |
|
|
..V .9. | |
|
-- |
* | |
|
S0C |
65'C ' |
GCfiC 65*C |
|
. 0.71 |
OJ&t/r |
*0,59' ,C>J5 |
mV A
53 3.9 5
70 23 86
06 t. 10*
106 1.3 123
133 0.83 13*
163 0.66 195
190 0.54
217 0.45
247 0.37
206 0.29
340 0.25
CORRECTION FACTORS
mV
4.5
2.9
2.1
1.5
1.1
0.78
mot* A
IB 62
. 25 62
35 102
50 120
70 150
05 - 105 120 150 185 240 300
FOR AMBiENT TEMPERATURE Am&loni lamp) retard Correction tactor
25*C
1.06
35 *C
0.94
|
Attachment: |
| Earning: Approval pending. |
