substation layout
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Substation layoutTRANSCRIPT
SUBSTATION LAYOUT, SWITCHING SCHEMES AND GENERAL ARRANGEMENT
16.02.2009 (15:45 TO 17:15)
MANOJ KUMAR, MANAGER (S/S), MOGA
Mob. : 09417215560
General ArrangementA Designer perspective, but fine
tuned at site Placement of switchyard Control Room placement Fire fighting pump house placement DG set placement LT station placement
(ACDB, DCDB, Battery Bank & Battery Charges)
Identification of roads & rail tracks Identification of boundary wall and
fencing Identification of approach roads Space for colony and other
infrastructures
Switchyard Layout
Single Line Diagram Bus Switching Scheme Normal rating with temperature
rise, Short time current rating Rating & insulation levels of the
equipments Bay numbering
General Arrangement
LAYOUT (PLAN & SECTION) OF SWITCHYARD
PLANNING ASPECTS:
• Switching scheme to be adopted.• Type of Layout (D or I)• Details of feeders requirements. • Future/anticipated expansion of the substation .• Available size of plot .
Major factors deciding a layout …
Standard factors Electrical clearances Heights of different levels & electric field
Variable factors Shape of land & feeder orientation
Bus bar arrangement Type of isolator used Arrangement of lightning protection
Location of control room building, FFPH
Roads and rail tracks
General Arrangement Following factors determine the switchyard area
Conventional (AIS) OR GIS
D Type OR I Type Layout
Automation (SAS) OR without Automation
GA:- Area occupied by one Dia in D & I Layout
8662.5 sqm=2.14 acre (27m bay width)
7969.5sqm=1.969 acre (24m bay width)
3504 sqm = 0.865 acre (24m bay width)
Layout (Plan & Sections)…
Selection of conductor for main bus, Transfer bus, Jack bus, equipment interconnection
AAC conductorACSR conductorAAAC conductorAluminium pipe
Space for a bay (bay width)Phase to phase clearancePhase to earth clearanceSection Clearance
….under worst condition
Minimum Clearances for Layout (at altitude <1000m above mean sea
level)…Voltage Level
(Rated)Ph-Ph
(mm)
Ph-E
(mm)
Sectional
Clearance (mm)
765 kV 7600 4900 10300
400 kV 4000 3500 6500
220 kV 2100 2100 5000
132 kV 1300 1300 4000
110 kV 1100 1100 3800
66 kV 630 630 3500
33 kV 320 320 2800
Altitude corrections w.r.t clearances, insulation levels, creepage and oil temperature rise of the equipment shall be considered for altitudes more than 1000 m above mean sea level.
Design Calculation for Layout …
Sag tension calculation & Sag tension Chart w.r.t initial static tension, maximum temperature rise etc.
Short circuit force calculation and determination of spacer span as per IEC:865
Direct Stroke Lightning Protection (DSLP) CalculationBy Lightning MastsBy Overhead earthwires
Design of earthing systemTouch & step potential controlGrid resistance as low as possibleLocation of fencing
Bay widths & levels…
Voltage Level
Bay width
First Level
Second Level
Third level
BIL
kVp
SIL
kVp
765 kV 38m 14m 27m 39m 2100 1550
400 kV 27/24m 8m 15m 22m 1550 1050
220 kV 18/16m 5.9m 11.7m 16.2m 1050 650
132 kV 12m 4.6m 7.5m 10.8m 650 NA
66 kV 7.6m 4m 6m 9.5m 325 NA
Ligtning Impulse : 1.2/50 micro secSwitching Impulse: 250/2500 micro sec
To understand Single Line diagram & Layout plan drawing…
To understand Layout Section drawing…
STANDARD CLASSIFICATION OF TOWERS
Tower Type
Height First Level
Height Second Level
Peak Angle of Deviation
End /Middle
TA 15 m NIL 7.5m ±30 deg End
TB 15 m NIL 7.5m ±30 deg Middle
TC 15 m NIL NIL 0 deg End
TD 15 m NIL NIL 0 deg Middle
TE 15 m NIL 7.5m 0 deg End
TF 15 m NIL 7.5m 0 deg Middle
TG 22 m NIL 7.5 m ±30 deg End
TH 22 m NIL 7.5 m ±30 deg Middle
TI 22 m NIL 7.5 m 0 deg End
TJ 22 m NIL 7.5 m 0 deg Middle
TK 15 m 7 m 7.5 m 0 deg Corner/ 2beams
TL 15 m 7 m 7.5 m 0 deg Middle/ 3beams
TM 15 m 7 m 7.5 m ±30 deg Corner/ 2beams
TN 15 m 7 m 7.5 m ±30 deg Middle/ 3beams
Wind Zone : 47m/Sec 400kV
NON-STANDARD TOWERS (MOGA)
Tower Type Description
400kVTG Beam at 15 m with peak 23m
TSP Beam at 23m with peak 30 m
G5 Beam at 15m (Twin Moose)
GSP Beam at 23m
220kVTA Beam at 11m
TB Beam at 11m & 17.5m
TC Beam at 11m & 17.5m with peak 22m
G1 Beam at 11m (Single Moose)
G2 Beam at 11m (Twin Moose)
G3 Beam at 17.5m (Single Moose)
Typical dimensions between equipments…
400 kV 220 kV 132 kV 66 kV
CB&ISO 10.5 m 6.5 m 3.75m 3 m
ISO&CT 7 m 4 m 2.5 m 2 m
CB&CT 7 m 3m+road+5 m 2.5 m 2 m
Gantry Tower &ISO
6 m 3.5 m 1.8 m 1.8 m
SA &PI& CVT 6 m 3.5 m 2.5 m 2 m
LA & SR 7 m - - -
Road & SR 15 m - - -
Control Room Building
Placement of Control, Relay & Protection
Panels PLCC Panels AC Distribution Board DC Distribution Board Batteries (220V, 48V) Battery Chargers Lighting Transformers Lighting Distribution Boards Rooms of Station-in Charge &
staff Miscellaneous
Fire Fighting Pump House
Placement of AC driven main pump DG driven stand-by pump Jockey Pump Air Vessels AC Distribution Board cum pump control panels Fire Water Tank
Miscellaneous
Placement of LT Station (ACDB, DCDB, Battery Bank &
Battery Chargers) Diesel Generator Set with AMF Panel Security hut Office Buildings Other residential buildings
Gas Insulated Substation (GIS)
GIS in POWERGRID POWERGRID is constructing 132kV, 220 kV
& 400 kV GIS substation Construction of 800 kV GIS is under
considerationTechnical Advantage of GIS All equipments are compact in size and
enclosed in SF6 gas with metallic enclosure
Area requirement of GIS is approx. 20% of conventional AIS
Lesser structures & foundation works; Hence less execution time
Costlier than AIS
Bus Bar Switching SchemesBus Bar Switching Schemes……Factors dictating choice of bus switching scheme
1) Reliability
No Power interruption during Bus fault
2) CB Maintenance
No Power interruption during CB maintenance. Taking out CB for maintenance shall be easy
3) Bus Bar Maintenance
No Power interruption during Bus bar maintenance
Bus Bar Switching SchemesBus Bar Switching Schemes……4) Simplicity of protection arrangements
Protection arrangements shall be simple for easy commissioning and regular checking
5) Ease of Extension
Extension of Bus bar necessary to take care of future expansion. Power interruption during such extension works.
6) Cost
Optimal techno-economic solution
Bus Switching SchemesBus Switching Schemes……
Single Main Bus Scheme Single Main Bus Scheme
– – with sectionaliser & without with sectionaliser & without sectionalisersectionaliser
Single Main & Transfer Bus Scheme Single Main & Transfer Bus Scheme Double Main Bus Scheme Double Main Bus Scheme Double Main with by-pass isolator Double Main with by-pass isolator
Bus schemeBus scheme Double Main & Transfer Bus SchemeDouble Main & Transfer Bus Scheme One & Half Breaker Bus SchemeOne & Half Breaker Bus Scheme Double bus two breaker SchemeDouble bus two breaker Scheme Ring Bus Scheme Ring Bus Scheme
Simplest and Simplest and cheapest bus bar cheapest bus bar schemescheme
Maintenance and Maintenance and extensions of bus extensions of bus bars are not bars are not possible without possible without shutdown of the shutdown of the substation.substation.
Operation & Operation & maintenance of bus maintenance of bus bar is easybar is easy.
SINGLE BUS SCHEMESINGLE BUS SCHEME
Similar to the single bus Similar to the single bus scheme except the scheme except the sectionalising breaker or sectionalising breaker or isolator.isolator.
By keeping the By keeping the sectionaliser open one sectionaliser open one section can be in service section can be in service and the other can be taken and the other can be taken for maintenance or for maintenance or extension.extension.
If a bus section breaker is If a bus section breaker is provided busbar protection provided busbar protection can detect fault on any can detect fault on any section and trip the section and trip the breakers connected to that breakers connected to that section and isolate it.section and isolate it.
SINGLE BUS WITH SECTIONALISERSINGLE BUS WITH SECTIONALISER
Individual CB can be taken Individual CB can be taken out for maintenance on-load out for maintenance on-load at a time.at a time.
The transfer bus coupler The transfer bus coupler acts as the breaker for the acts as the breaker for the circuit under by pass.circuit under by pass.
Individual circuits have a Individual circuits have a bypass isolator to connect bypass isolator to connect to the transfer bus and this to the transfer bus and this isolator will be closed isolator will be closed during bypass operation of during bypass operation of that particular circuit.that particular circuit.
SINGLE MAIN AND TRANSFER SINGLE MAIN AND TRANSFER SCHEMESCHEME
Load will be distributed on both the Load will be distributed on both the buses and the bus coupler shall be buses and the bus coupler shall be normally closed.normally closed.
For maintenance & extension of For maintenance & extension of any one of the buses the entire any one of the buses the entire load will be transferred to the load will be transferred to the other bus.other bus.
On load transfer of a circuit from On load transfer of a circuit from one bus to the other bus is possible one bus to the other bus is possible through bus isolators provided the through bus isolators provided the bus coupler is closed and thereby bus coupler is closed and thereby two buses are at the same two buses are at the same potential.potential.
On load bypassing of any circuit for On load bypassing of any circuit for breaker maintenance is not breaker maintenance is not possiblepossible.
DOUBLE BUS SCHEMEDOUBLE BUS SCHEME
DOUBLE BUS WITH BY-PASS SCHEMEDOUBLE BUS WITH BY-PASS SCHEME
This bus arrangement provides the facilities This bus arrangement provides the facilities of a double bus arrangement & a main and of a double bus arrangement & a main and transfer bus arrangement.transfer bus arrangement.
The bus to which the transfer bus isolator is The bus to which the transfer bus isolator is connected can be used as a transfer bus connected can be used as a transfer bus also.also.
During the time a circuit is under bypass, the During the time a circuit is under bypass, the bus coupler will act as the breaker for the bus coupler will act as the breaker for the bypassed circuit.bypassed circuit.
DOUBLE BUS WITH BY-PASS SCHEMEDOUBLE BUS WITH BY-PASS SCHEME
In this bus scheme, in In this bus scheme, in addition to the two main addition to the two main buses there will be a buses there will be a separate transfer bus also. separate transfer bus also.
Since separate transfer bus Since separate transfer bus is available there will be no is available there will be no need of transferring the need of transferring the load from one bus to the load from one bus to the other bus unlike in a double other bus unlike in a double main cum transfer bus main cum transfer bus arrangement.arrangement.
Other features are similar Other features are similar to the one described in to the one described in double bus with by pass double bus with by pass arrangement.arrangement.
DOUBLE MAIN AND TRANSFER DOUBLE MAIN AND TRANSFER SCHEMESCHEME
In this scheme, two circuit In this scheme, two circuit have three breakers, the have three breakers, the middle breaker ties the two middle breaker ties the two circuits and hence is called the circuits and hence is called the tie breaker. tie breaker.
Breaker or bus maintenance is Breaker or bus maintenance is possible without any shut possible without any shut down of the feederdown of the feeder
Even if both the buses are out Even if both the buses are out of service, power can be of service, power can be transferred from one feeder to transferred from one feeder to another feeder through tie another feeder through tie breakerbreaker
BREAKER AND HALF SCHEMEBREAKER AND HALF SCHEME
Each feeder is controlled Each feeder is controlled by two breakers.by two breakers.
This arrangement is This arrangement is comparatively costlier comparatively costlier than other scheme and than other scheme and hence followed in very hence followed in very important circuit only. important circuit only.
In this arrangement In this arrangement breaker maintenance for breaker maintenance for any feeder circuit is easily any feeder circuit is easily possible without any possible without any shutdownshutdown..
DOUBLE BUS TWO BREAKER SCHEMEDOUBLE BUS TWO BREAKER SCHEME
As long as the ring is As long as the ring is closed load has two closed load has two sources of supply and any sources of supply and any circuit breaker can be circuit breaker can be taken out of service taken out of service without affecting the without affecting the supply.supply.
Extension of ring scheme Extension of ring scheme is difficult.is difficult.
No bus bar protection No bus bar protection requiredrequired..
RING BUS SCHEMERING BUS SCHEME
Bus Switching Selection Bus Switching Selection considerations…considerations…
ReliabilityReliability Operation Flexibility Operation Flexibility Ease of MaintenanceEase of Maintenance Short Circuit Level LimitationShort Circuit Level Limitation Simplicity of Protection Simplicity of Protection
ArrangementArrangement Ease of Future expansionEase of Future expansion Land availabilityLand availability Cost Cost
A Case Study
Of
MOGA SUBSTATION
800 / 400 / 220 KV MOGA SUBSTATION
1065 MVA(4 ICTs & 3 Reactors)
800 KV KMTL-249.212 km
(Loc 602-730)
800 KV KMTL-151.343 km
(Loc 581-710)
400 KV D/C JMTL52.232 km
(Loc 510-647)
400 KV D/C MHTL & MFTL120.465 km(Loc 1- 321)
TRANSMISSION NETWORK OF MOGA SUBSTATION
220 KV D/C PSEB Jagraon-I&II
(35km)
400 KV D/C MOGA -Bhiwadi 352 km (under const.)
NRSSS-V
+ under const : 2 Nos. 63 MVAR Bhiwadi Line
React(NRSSS-V)+ Proposed : 765/400kV
System and LILO of PSEB Nakodar Line
220 KV D/C PSEB MOGA-I&II(400mtr)
220 KV D/C PSEB MOGA-III &IV
(400 mtr)
765 KV S/C Bhiwani - MOGA
Layout of Moga Substation A Case Study
D Type Layout (Residential area is more than switchyard area)
DE Tower of 400kV D/C Hisar Line located in 220 kV Switchyard obstructing future expansion of 220 kV S/Y
Location of Dead End Tower from Take off Gantry: Dead End Tower of 220kV Jagraon Line of PSEB was shifted from 30m to 100m outside boundary wall
Gantry is designed for 200m span with angle deviation ±30 deg both in vertical & horizontal plane
LAYOUT OF COLONY & SUBSTATION COMPLEX
Layout of Moga Substation: A Case Study
Bhiwadi Bays Extn works at Moga: Problems identified and changes proposed as per site conditions
Take-off gantry of Bhiwadi Line shifted by 9m to reduce angle on gantry from 15 deg to 9 deg
Matching of towers TG (Standard vs Non-standard)
Dead End Tower of 400kV Moga-Bhiwadi Line was shifted as per site condition facilitating 765kV interconnection
Foundation for CT in Tie Bay falling over already constructed cable trench
No scope kept for Stone spreading, construction of approach roads for bays, incl old KMTL bays
Re-orientation of rail track in reactor foundation
LM marked in the engg. drawing but not existing
Layout of Moga Substation A Case Study
Re-locating 50 MVAR Bus Reactor Bay numbering in random order including Tie
Bay T1 & T2 Isolators 400kV D/C Moga -Jalandhar Line in one Dia Provision of SVC 33kV, 25 MVAR Tertiary Reactors Shifting of Bus CVTs Conversion of 5 CT to 3 CT protection scheme Re-locating 245kV CT to enhance availability
B. ADDITIONAL LAND ACQUIRED : 33 Acers
FOR 800 KV SWITCHYARD
C. ADDITIONAL LAND BEING : 32.3 Acres
ACQUIRED FOR 765KV SUBSTATION (2X1500 MVA, 765/400KV ICT, 2x240MVAR BUS REACTOR,
1X240 MVAR LINE REACTOR & TSS OF TALWANDI SABO OF PSEB)
A. TOTAL AREA : 70.25 Acers1. 400 KV SWITCHYARD : 31.60 Acres
2. TOWNSHIP BUILT-UP AREA : 13.77 Acres
3. TOWNSHIP OPEN AREA : 24.88 Acres
ICT-I BAY220 kV PSEB-I I I
220 kV PSEB-IV
220 kV PSEB-I
220 kV PSEB-I I
400 KV BUS-I
400 KV BUS-I I
220 KV BUS-I
220 KV BUS-I I
220 KV TRANSFER BUS
ICT-I I BAY
ICT-I I I BAY
250 MVAICT-I
250 MVAICT-I I
250 MVAICT-I I I
400 KV KISHENPUR-I I
400 KV JALANDHAR-I I
400 KV JALANDHAR-I
400 KV KISHENPUR-I
400 KV
FATEHABAD
400 KV
HISAR
BUS COUPLER
220 kV TBC BAY Switchyard Fencing
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SINGLE LINE DIAGRAM OF 400 / 220 KV MOGA SUBSTATION (WITH FUTURE PLAN)
63 MVARLINE
REACTOR
63 MVARLINE
REACTO
R
25 MVARTer. Reactor-I
25 MVARTer. Reactor-I I
1 MVA33/0.433 kV
Bhiwadi-I
41489A
41489AE
41389T2
41389T2E
41352
41389T1E
41389T1
1000-500/1A
41289BE
41289B
41289A
41289AE
41252
41289L
41289LE
41289R
41289RE
4189LE
4189L
4389T14189B
4189BE
4152
4189AE1
4189A
4389T1E
4352
4389T2
4389T2E 4289BE
4289B
4252
4289A
4289AE1
4289L
4289LE
41589R
41589RE 41652
41552
41589B
41589BE
41589AE
41589A
41589L
41589LE
41689T1
41689T1E
41689T2E
41689T2
4989A
4189AE2
4289AE2
4989AE
4989B
4989BE
4952 41052
411524989C
4989CE
41189T1
41189T1E 41189T2E
41089BE
41089B
41089A41089AE
41089C41089C
E
41889A 41889AE
41852
41889B
41889BE
48524889T2
4889T2E
4889T1
4889T1E
4552
4589A
4589AE
4589BE
4589B
4589L
4589LE41889CE
41889C
4689A
4689B
4689C
2152
2252
2752 2352 2852 2452 2552 2652 2952
2189A
2189B
2189C
2289A 2289B 2789A
2789B
2789C
2789L
2389A
2389B
2389T
2889A
2389C
2889B
2889C
2889L
2489A
2489B
2489C
2489L
2589A
2589B
2589C
2589L
2689A
2689B
2689T
2689C
2989A
2989B
2989C
2989T
2189E1
2189E2
2289E1 2789E1
2789E2
2789E3
2389E1
2389E2
2389E3
2889E1
2889E2
2889E3
2489E1
2489E2
2489E3
2589E1
2589E2
2589E3
2689E1
2689E2
2689E3
2989E1
2989E2
2989E3
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A 1000-
500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
4489A
4489AE
4452
4489BE
4489B4789T2 4752
4652
4789T2E
4789T1E
4789T1
4689AE
4689BE
4689CE
1000-500/1A
1000-500/1A
1000-500/1A
Bhiwadi-II
220 kV Jagraon-I
ICT-I V BAY
41452
1000-500/1A
41489BE
41489B
50 MVAR BUS
REACTOR
41489RE
41489R
315 MVA ICT-IV
Spare
220 kV Jagraon-II
41789A
41789AE
63 MVARLINE
REACTO
R
63 MVARLINE
REACTO
R
41952
42052
42189A
42189AE41989A
E41989A
41989BE
41989B
42089T1
42089T2
42089T2E42089T1E
41989L
41989LE
42089R
42089RE
41789B
41789BE
41752
41789L
41789LE
41789R
41789RE
21052 21152 21252
21089A
21089B
21089C
21089T
21089E1
21089E2
21089E3
1000-500/1A
1000-500/1A
1000-500/1A21189C
21189E3
21189E2
21189A
21189B21189E
1
21289A
21289B21289E
1
21289C
21289E3
21289T
21289E2
21189T
Small Scale industry
Small Scale industry
House
TO BE DI SMENTELED
Small Scale industry
Small Scale industry
House
TO BE DISMENTELED
Small Scale industry
Small Scale industry
House
TO BE DISMENTELED
ICT-I BAY220 kV PSEB-III
220 kV PSEB-IV
220 kV PSEB-I
220 kV PSEB-II
220 KVICT- IV
400 KV BUS-I
400 KV BUS-II
220 KV BUS-I
220 KV BUS-II
220 KV TRANSFER BUS
ICT-II BAY ICT-III BAY
250 MVAICT-I
250 MVAICT-II
250 MVAICT-III
50 MVAR BUS
REACTOR
400 KV KISHENPUR-II
400 KV BHIWADI-I
400 KV BHIWADI-II
400 KV JALANDHAR-II
400 KV JALANDHAR-I
400 KV KISHENPUR-I
SPARE
220 kV PSEB-VI
400 KV HISAR-II
400 KV HISAR-I
250 MVAICT-IV
220 kV PSEB-V
BUS COUPLER
220 kV TBC BAY
Existing 400 kV
D/C Dead End
Tower
Switchyard Fencing
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MOGA SUBSTATION AUGMENTATION OF EXISTING TRANSFORMATION CAPACITY - INSTALLATION OF ICT-IV AND ASSOCIATED BAYS
LOCATION OF
BHIWADI – I & II
( PROPOSED )
220
kV
SH
OR
T L
INE
63 MVARLINE
REACTOR
63 MVARLINE
REACTOR
220
kV
SH
OR
T L
INEA
C D
B
IPS Al BUS on BPIs
220 KV BUS-I
220 KV BUS-II
Existing Conductor Bus
Conductor BusApprox. length 50 m
ICT-I BAY
220 kV PSEB-III
220 kV PSEB-IV
220 kV PSEB-I
220 kV PSEB-II
220 KV
ICT- IV
400 KV BUS-I
400 KV BUS-II
Existing 220 KV Conductor BUS-I
Existing 220 KV Conductor BUS-II
220 KV TRANSFER BUS
ICT-II BAY ICT-III BAY
250 MVAICT-I
250 MVAICT-II
250 MVAICT-III
400 KV KISHENPUR-II
400 KV BHIWADI-I
400 KV BHIWADI-II
400 KV JALANDHAR-I
400 KV KISHENPUR-I
50 MVAR
BUS REACTORE
220 kV PSEB-VI
400 KV HISAR-II 400 KV
HISAR-I
220 kV PSEB-V
BUS COUPLER
220 kV TBC BAY
Existing 400 kV
D/C Dead End
Tower
Switchyard Fencing
MOGA SUBSTATION AUGMENTATION : ICT-IV & ASSOCIATED 220 KV BAYS, 400 KV BHIWADI-I&II LINES
LOCATION OF
BHIWADI – I & II
( PROPOSED )
63 MVARLINE
REACTOR
63 MVARLINE
REACTOR
A
C D
B
IPS Al pipe on BPIs
Proposed 220 KV Conductor BUS-I
Proposed 220 KV Conductor BUS-II
400 KV JALANDHAR-II
SPARE
25 MVARTer.
Reactor-I
25 MVARTer. Reactor-
II
1 MVA33/0.433
kV
Approx. 50m
CGL
ISOL:KEP
41152
41352
41252
4352
42524152 41552
41652
4952 41052 41852
4852
4552
4452
4752
4652
21522252
27522352
24522552 2652 2952
414
52
41752
42052
41952
42189A
212522115221052
250 MVAICT-IV
13
1412
3
1 2
9
11
10
15
18
8
5
17 19
20
4
7
6
91
27 3 4 5 6
2852
8
2189A 2189B2189E1
2289A2189B
2189E1
2789A 2789B
2789E1
2189E2
2189C
2789L
2789C
2789E2
2789E3
2389A2389B
2389T
2389E2
2389E1
2389C
2389E3
2889A2889B
2889E1
2/889E2
2889L2889E3
2889C
2489A2489B
2489E1
2489E22489L
2489E3
2489C
2589A 2589B
2589E1
2589E2
2589L
2589C
268
9A
268
9B
2689E1
2689E22689T
2689E3
2689C 2989C
2989T
298
9A
298
9B
2989E1
2989E2
2989E3
4989A4989AE
4989BE
4989B
411
89T
1E
41189T1
4989C
4989CE
41189T2
41189T2E
41089C41089CE
41089B
41089BE
41089A
41089AE41889A
41889AE
41189BE
41889BE
418
89C
41889CE4889T2
4889T2E4889T1E
4889T1
458
9L
4589LE
458
9A4589AE
4589A
4589AE
4489A
4489AE
448
9B
4489BE
448
9L
4489LE
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4789T1
41489A41489AE
41489BE
414
89B
414
89R 41489RE
41389T1
41389T1E 41389T2E
41389T2
41289BE
41289B
41289AE41289A
4189AE1
4189AE24189A
4189BE14189B
4389T1E
4389T1
4389T2E
4189LE14189L
4189T24289L
4289LE
41289R
412
89R
E
41289LE41289L
4289AE2
4289AE24289A
4289BE1
4289B
41589A41589AE
41589BE41589B
41589R 415
89R
E 41589L
41589LE
41689T141589R
416
89T
1E
41689T2
41689T2E41789BE
41789AE41789A
41789B
41789L41789LE
41989A41989AE
41989BE41989B
41989LE
41989L
42089T2E
42089T1
42089T1E
42089T2
42189AE
4689A4689AE
4689BE
4689B
4689C4689CE
21089C
21089E3
21089L21089E2
21089E121089B
21089A
21189C
21189E3
21189L
21189E2
21189E1
21189A21189B
21289C
21289E321289T
21289E2
21289E1
21289A 21289B
CO
NT
RO
L
RO
OM
16
SINGLE LINE DIAGRAM OF 220kV DMT SCHEME
ICT-I BAY220 kV PSEB-I
400 KV BUS-I
400 KV BUS-II
220 KV BUS-I
220 KV BUS-I I
220 KV TRANSFER BUS
ICT-I I BAY
250 MVAICT-I
250 MVAICT-I I
BUS COUPLER
4989A4989AE
4989B
4989BE
4952 41052
411524989C
4989CE
41189T1
41189T1E 41189T2E
41089BE
41089B
41089A41089AE
41089C
41089CE
2152
2252
2352 2452 2652
2189A
2189B
2189C
2289A 2289B 2389A2389B
2389T
2389C
2489A
2489B
2489C
2489L
2689A
2689B
2689T
2689C
2189E1
2189E2
2289E1 2389E1
2389E2
2389E3
2489E1
2489E2
2489E3
2689E1
2689E2
2689E3
1000-500/1A
1000-500/1A 1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
SINGLE LINE DIAGRAM OF 220kV DMT SCHEME WITH 245kV CT RELOCATED
ICT-I BAY220 kV PSEB-I
400 KV BUS-I
400 KV BUS-II
220 KV BUS-I
220 KV BUS-I I
220 KV TRANSFER BUS
ICT-I I BAY
250 MVAICT-I
250 MVAICT-I I
BUS COUPLER
4989A4989AE
4989B
4989BE
4952 41052
411524989C
4989CE
41189T1
41189T1E 41189T2E
41089BE
41089B
41089A41089AE
41089C
41089CE
2152
2252
2352 2452 2652
2189A
2189B
2189C
2289A 2289B 2389A2389B
2389T
2389C
2489A
2489B
2489C
2489L
2689A
2689B
2689T
2689C
2189E1
2189E2
2289E1 2389E1
2389E2
2389E3
2489E1
2489E2
2489E3
2689E1
2689E2
2689E3
1000-500/1A
1000-500/1A 1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A
1000-500/1A1000-500/1A
CABLE TRENCH
Section Inner Dim Racks
Section 1 - 1 1.95 m 5 both sides
Section 2 - 2 1.05 m 3 one side
Section 3 – 3 0.75 m 2 one side
Section 4 – 4 0.40 m 1 one side
ERECTION, TESTING & COMMISSIONING OF
CT & CVT (UP TO PRE-COMMISSIONING CHECKS)
17.02.2009 (11:30 TO 12:30)
MANOJ KUMAR, MANAGER (S/S), MOGA
ERECTION OF CVTERECTION OF CVT
INTRODUCTIONINTRODUCTION Devices used to get the replica of primary
voltage which shall be suitable for measuring instruments and protective relays.
No. of cores as per requirement CVTs used generally above 220kV for
economic reasons - also obviates need for separate coupling capacitor for PLCC
Pre Commissioning Tests of CT
Polarity TestMagnetization Curve TestRatio TestPrimary Current Injection TestSecondary Current Injection Test