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Oil Immersed Distribution Transformer 2

Quantity:

11kV 1000kVA Distribution Transformer

Features:

1. The transformer connection group uses Dyn11 to reduce the impact of harmonics on the power grid and improve the quality of power supply.

2. The transformer core is laminated with quality cold-rolled silicon steel sheets, which greatly reduces the no-load loss and no-load current. The core is bound to ensure the tightness of the core and reduce noise.

3. Fully sealed structure, which prolongs the service life. A positioning mechanism is added to the body to prevent displacement during transportation. All fasteners are equipped with fastening nuts to ensure that the fasteners are not loose during long-term operation.

4. Lower noise value than standard requirement. After this series of transformers have been transported normally, the relevant parts can be installed without core inspection, and they can be put into operation once the acceptance test is qualified.

 

Technical Data:

Item

Description

Schedule 2

(TENDERER OFFER)

-1000kVA

1

Quantity

1

2

Transformer Rating           kVA

1000

3

System Frequency           Hz

50

4

Transformer external paint

Dark Admiralty Grey colour No. 632 as per BS 381C

5

Corrosive environment

High

6

Dimensions

 

6.1

Overall height              mm

1800

6.2

Overall length              mm

2090

6.3

Overall width               mm

1430

7

Total mass                  KG

2261

8

Tank type

Breathing

9

Tank sealing;

Bolted

10

Under-base;

660×820

11

Skids and Jacking lugs for concrete plinth mounting

40

12

Details of jacking pads

See drawing

13

Lifting lugs

 

13.1

For cover

YES

13.2

For tank

YES

14

Terminations

Cable box

15

Position of bushings

11kV: Top,

LV: Cable Box

16

Medium-volage bushings

 

16.1

material/colour

Brown

Porcelain

16.2

creepage distance        mm

25 mm/kV

16.3

phase to earth clearance  mm

≥125

16.4

phase to phase clearance  mm

≥125

17

Low-voltage bushings

 

17.1

material/colour

Brown Porcelain

17.2

creepage distance         mm

25 mm/kV

18

Cooling method

ONAN

19

Core type

Laminated stackings

20

Core clamping 

Channel

21

HV Winding

Cu

22

LV Winding 

Cu

23

Primary voltage                 V

415

24

Secondary voltage               V

11000

25

Number of phases;

3 Phase

26

Rating of neutral terminal

As phase terminal

27

Tap Changer

NLTC,  ±2X2.5%  Tapping range

28

Vector symbol

dYN11

29

Losses corrected to 75°C

 

29.1

no-load losses                W

1799

29.2

full load cu losses              W

11250

29.3

full load  total  losses     W

13049

29.4

25% loading                W

4815

29.5

50% Loading                W

7830

29.6

75% Loading                W

10855

29.7

125% Loading

16892

29.8

Transformer  efficiency  at  unity % power  factor,  rated  voltage  and full load (75°C)

0.988

30

Impedance voltage

 

30.1

maximum tap                 %

≤5.3

30.2

nominal tap                   %

≤5

30.3

minimum tap                  %

≤4.75

31

Insulation level  

 

31.1

medium-voltage               kV

 

35/85

31.2

low-voltage                  kV

5



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