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Transformers / Compact Sub-Station

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ABB

Oil Type

Medium and Large
Distribution Transformers

MDT and LDT are used to step down three phase high voltage to low voltage for power distribution, mainly in metropolitan areas and for industrial applications.

The transformers in standard versions are designed for use in tropical climates and can be installed both outdoors and indoors.

These transformers are manufactured and tested in accordance with IEC Publication 60076.
They are also in compliance with several national standards eg,BS 171,SS 404,ANSI C27 etc.

MDT/LDT can be hermetically sealed (the tank is completely filled with oil) or fitted with oil conservator. Both types are supplied with flexible corrugated tank walls enabling sufficient cooling of the transformers. They also compensate for the changes in the oil volume during operation. An advantage of the hermetically sealed transformers is that the oil is never in contact with the atmosphere thus avoiding periodic analysis of the oil.For the LDT, it can be manufactured either with off-circuit tap changer, or on-load tap changer.

Standard Features

1. Corrugated tank
2. Undercarriage
3. Oil filling plug on the cover
4. oil drain valve
5. Cable boxes (air-insulated)
6. Off-circuit tap changer (5 positions)
7. Magnetic oil-level indicator
8. Dial type thermometer
9. Compound gauge with two contacts
10.Pressure relief device
11.Rating plate
12.Earthing terminals
13.The Hermetically sealed

Compact Sub Station

11KV Compact Sub-station housing, cable, termination kit and 4 way LV feeder pillar

Type designation	Max. transformer	L All measurements in mm	W	H (above ground)
Compact
CSS-CC.1	1 x 400 kVA	3000	1360	1580
CSS-CC.2	1 x 1000 kVA	3000	2360	1780
CSS-CC.3	1 x 1000 kVA	3000	2360	1930
CSS-CC.4	2 x 1000 kVA	3000	3260	1930

Technical Data of Distribution Transformer 6.6/0.433 kV Dyn 11

kVA TYPE LOSSES (W) IMPEDANCE (%) TOTAL WEIGHT (KG) OIL QUANTITY (LITRE) OVERALL DIMENSION (MM) DIAGRAM

NO
LOAD LOAD LENGTH WIDTH HEIGHT

100 S 300 1500 4.75 663 151 918 622 1050 A

300 S 600 2800 4.75 1628 320 1237 787 1270 A

500 S 1000 4100 4.75 1967 452 1360 840 1418 A

750 S 1200 6000 4.75 2607 461 1649 986 1475 A

1000 S 1400 7000 4.75 3278 533 1700 920 1580 A

1500 C 1600 16300 6.00 3923 762 1829 1768 2001 A

Technical Data of Distribution Transformer 11/0.433 kV Dyn 11

kVA TYPE LOSSES (W) IMPEDANCE (%) TOTAL WEIGHT (KG) OIL QUANTITY (LITRE) OVERALL DIMENSION (MM) DIAGRAM

NO
LOAD LOAD LENGTH WIDTH HEIGHT

50 S 150 900 4.75 551 159 1035 855 1040 A

100 S 300 1500 4.75 620 140 918 697 1050 A

300 S 6000 2800 4.75 2323 326 1212 781 1288 A

500 S 1000 4100 4.75 2342 436 1370 850 1387 A

750 S 1200 6000 4.75 2676 507 1622 1002 1502 A

1000 C 1400 7000 4.75 3447 612 1679 930 1625 A

1250 C 1600 10000 5.00 4023 762 2009 2003 1983 B

1500 C 1600 14570 6.00 4246 926 2011 1765 2120 B

2000 C 25000 25000 6.00 5248 1233 2110 1810 2422 B

2500 C 25000 25000 7.00 5466 1244 2041 2986 2588 B

EWT Transformer

Distribution Transformers
25 kVA – 3000 kVA up to maximum voltage of 33 kV.

Earthing Transformers
Fault current 800 – 2100 Amp up to maximum voltage
Off 33 kV.

33 kV Power Transformers
5 MVA – 30 MVA

132 Kv Power Transformers
15MVA – 90 MVA

The plant is designed to have the annual capacity of producing up to 3000 MVA of distribution transformers, 4320 MVA of 33 kV power transformers and 3000 MVA of 132 kV & 275 kV power transformers

RATED POWER (Kva) 100 300 500 750 1000

OIL (LITRE) 265 284 375 468 547

MASS
(kg)
STANDARD

OPTION 1600 2045 3130

LENGTH
(mm)
L1 1023 1165 1255 1290 1350

WIDTH
(mm)
W1 868 870 940 950 1110

W2 1696 1698 1760 1770 1962

HEIGHT
(mm)
H1 1222 1309 1400 1595 1675

H2 1600 1660 1690 1880 1854

RATED POWER (Kva) 500 750 1000 1250 1500 2000 2500

OIL (LITRE) 381 488 791 730 1085 1861 2005

MASS
(kg)
STANDARD 1590 2110 2835 3135 3880 5265 6020

OPTION 1805 2325 3050 3355 4095 5480 6235

LENGTH
(mm)
L1 1508 1470 1693 1650 1706 1975 2166

WIDTH
(mm)
W1 1048 1025 1160 1130 1160 1380 1360

W2 1890 1845 1995 1960 2190 2411 2390

HEIGHT
(mm)
H1 1375 1610 1750 1685 2000 2133 2160

H2 1660 1865 1941 1890 2205 2300 2350