11kV 1000kVA distribution transformer manufactured by Rockwill in China. It uses Dyn11 and the core is laminated with quality cold-rolled silicon steel sheets. Fully sealed structure, which prolongs the service life. Lower noise value than standard requirement.
11kV 1000kVA Distribution Transformer
Features of 11kV 1000kVA Distribution Transformer:
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 of 11kV 1000kVA Distribution Transformer:
|
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 |
