1. UPDATE ON ASSETS
IN CESC’S T&D NETWORK

2. CESC’S T&D NETWORK
567 Sq. Km. Area
T&D LINE (CKT. KM)
15 nos. 132 kV S/S
88 nos. 33 kV D/S
132 kV - 267
33 kV
6/11 kV

3. ASSETS IN CESC’S T&D NETWORK
YARD EQUIPMENT
CABLES & O/H LINES
CT PT LA
TRANSFORMERS
ISOLATOR
SWITCHGEAR
CAP. BANK
BATTERY

4. CABLES & O/H LINES

5. CABLES & O/H LINES CIRCUIT KM : KV CABLES O/H LINES TOTAL 132 186 81
267 33
1102 92
1194
6 & 11
4038 87
4125

6. TYPES & SIZES OF CABLES :KV
CABLE INSULATION
CONDUCTOR MATERIAL
CROSS-SECTION (SQ. MM)
6 & 11
PILC AL
50, 150, 225 & 300 CU
26, 48, 97, 161 & 645
XLPE
50, 150, 240 & 300
630 33
300 & 400
161, 194 & 645
240, 300, 400 & 1000
500 & 630
132
PILC GAS FILLED
225
150, 161 & 260
400, 630 & 800

7. TRANSFORMERS

8. DISTRIBUTION TRANSFORMER
POPULATION :
POWER TRANSFORMER
132/33 kV Class :
33 nos.
33/11-6 kV Class :
169 nos.
6/11 kV, 6/3.3 kV Class :
10 nos.
DISTRIBUTION TRANSFORMER
6/0.42 kV Class :
4721 nos.
11/0.42 kV Class :
998 nos.

9. DISTRIBUTION TRANSFORMER
CAPACITY :
POWER TRANSFORMER
132/33 kV Class :
50, 55, 75 MVA
33/11-6 kV Class :
7, 10, 15, 16, 20 MVA
6/11, 6/3.3 kV Class :
3, 5, 10, 12.5 MVA
DISTRIBUTION TRANSFORMER
6/0.42 kV Class :
100, 200, 315, 400, 600 kVA
11/0.42 kV Class :
315 kVA and 400 kVA

10. TRANSFORMER
AGGREGATE CAPACITY :
POWER TRANSFORMER
132 kV MVA
33 kV MVA
6/11 kV MVA
DISTRIBUTION TRANSFORMER
MVA

11. %Z, BIL AND VECTOR GROUP :
TRANSFORMER
%Z, BIL AND VECTOR GROUP :
POWER TRANSFORMER
132/33 kV Class :
15%, kVp, YNd1
33/11-6 kV Class :
8-11%, 170 kVp, Dyn11
6/11, 6/3.3 kV Class :
10%, kVp, YNyn0d1
DISTRIBUTION TRANSFORMER
6/0.42 kV Class :
4-5%, kVp, Dyn11
11/0.42 kV Class :

12. DISTRIBUTION TRANSFORMER
TAP CHANGER :
POWER TRANSFORMER
REACTOR TYPE
VARIETY
RESISTOR TYPE
TAP-LINK
132/33 kV 33 8
33/11-6 kV 45 1
121 3
6/11, 6/3.3 kV 10
DISTRIBUTION TRANSFORMER
ALL TAP-LINK

13. DISTRIBUTION TRANSFORMER
NEUTRAL EARTHING :
POWER TRANSFORMER
132/33 kV Class :
HV N – SOLIDLY EARTH
LV SIDE – EARTHED THRU ET
33/11-6 kV Class :
LV N – SOLIDLY EARTHED FOR 11KV
LV N – EARTHED THRU NER FOR 6KV
6/11, 6/3.3 kV Class :
HV/LV N – SOLIDLY EARTHED ON THE SECONDARY SIDE.
DISTRIBUTION TRANSFORMER
6/0.42 kV Class :
LV N SOLIDLY EARTHED
11/0.42 kV Class :

14. POWER TRANSFORMER AGE-GROUP WISE POPULATION (NOS.) : AGE-GROUP
132/33 kV
33/11-6 kV
6-11/0.4 kV
0 to 5 Yrs. 4 18
5 to 10 Yrs. 2
10 to 15 Yrs. 9 37
15 to 20 Yrs. 20
20 to 25 Yrs. 5 12
25 to 30 Yrs. 1 6
30 to 35 Yrs.
35 to 40 Yrs.
40 to 50 Yrs.
50 to 60 Yrs. 31
> 60 Yrs.

15. DISTRIBUTION TRANSFORMERS

16. DISTRIBUTION TRANSFORMERS
O/T : NOS.
T/H : NOS.
P/T : NOS.

17. DISTRIBUTION TRANSFORMERS
PROTECTION :
HT ISOLATOR
HT CABLE BOX
HRC FUSE ON HT
HRC FUSE ON LT

18. DISTRIBUTION TRANSFORMERS
AGE-GROUP WISE POPULATION :
TOTAL (nos.)
0-5 YRS (nos.)
5-10 YRS. (nos.)
10-15 YRS. (nos.)
15-20 YRS. (nos.)
> 20 YRS. (nos.)
5719
1514
1199
1275
600
1131

19. SWITCHGEAR

20. COMPOUND / OIL FILLED BUSBAR (nos.)
SWITCHGEAR
POPULATION :
kV Class
OUTDOOR CB (nos.)
INDOOR SWGR
GIS (nos.)
AIS (nos.)
COMPOUND / OIL FILLED BUSBAR (nos.)
132 80 15 33
115 27
214 66
6 & 11
1037
323

21. SWITCHGEAR INTERRUPTER : kV Class TOTAL (nos.) SF6 (nos.) 132 33
VAC. (nos.)
MOCB (nos.)
BOCB (nos.)
132 95 81 14 33
422 48
215 6
153
6 & 11
1360
458
463 50
389

22. SPRING-PNEU MATIC (nos.)
SWITCHGEAR
OPERATING MECHANISM :
kV Class
TOTAL (nos.)
SPRING (nos.)
HYDRAULIC (nos.)
PNEUMATIC (nos.)
SPRING-PNEU MATIC (nos.)
SOLENOID (nos.)
132 95 49 15 9 22 33
422
282
140
6 & 11
1360
1229
131

23. AGE-GROUP WISE POPULATION :
SWITCHGEAR
AGE-GROUP WISE POPULATION :
kV Class
TOTAL (nos.)
0-5 YRS (nos.)
5-10 YRS. (nos.)
10-15 YRS. (nos.)
15-20 YRS. (nos.)
> 20 YRS. (nos.)
132 95 11 26 40 8 10 33
422 84 54 72 53
159
6 & 11
1360
195
250
267
162
486

24. CAPACITOR BANK

25. CAPACITOR BANK POPULATION & CAPACITY: 132 kV 33 kV 11 kV 6 kV
NO. OF BANKS 2 13 6 56
COMMON RATING
50 MVAR
15 MVAR
4 MVAR
AGGREGATE CAPACITY
100 MVAR
205 MVAR
23 MVAR
192 MVAR

26. CAPACITOR BANK PROTECTION: PROTECTION 132 kV 33 kV 11 kV 6 kV ENCLOSED27
NON-ENCL. 2 13 29
INTERNAL FUSE 8 40
EXTERNAL FUSE 5 16

27. CAPACITOR BANK AGE-GROUP WISE POPULATION: AGE-GROUP 132 kV 33 kV 11 kV
0 - 5 YRS. 2 8 5 14
YRS. 6
YRS. 1 12
YRS.
YRS. 3
YRS.
YRS.
YRS.

28. BATTERY

29. BATTERY RATING : FOR 132 kV SUBSTATIONS 200 - 250 Ah; 220 Volts
FOR 33/11-6 kV DISTRIBUTION STNS.
40 Ah; 110 Volts

30. BATTERY AGE-GROUP WISE POPULATION : BATTERY 0 - 5 Yrs. 5 - 10 Yrs.
220 5 9 6 2
110 29 49 11

31. Thank you