110kV LEVEL THREE-PHASE ON-LOAD TAP-CHANGING
ELECTRIC POWER TRANSFORMER
Summary
We have adopted series of important reforms on the 110kV level three-phase oil-immersed on-load tap-changing transformer referring material,
process and structure. The transformer has the features of small size, light weight, high efficiency, low loss, low noise, reliable operation etc,
which can reduce a large amount of power network loss and operation expenses with significant economic beneffts. It is suitable for power plant substation,
heavy section plant ore enterprises etc.
| Main 110kV level three-phase on-load tap-changing power transformer technical parameters |
| Rated
Capacity
(kVA) |
Voltage Combination |
Vector Gourp |
No-load Loss |
Load Loss |
No Load
Current |
Short Circuit
Impedance
% |
| HV
(kV) |
LV
k(V) |
kW |
kW |
% |
| 6300 |
|
6.3
6.6
10.5
11 |
YNd11 |
7.40 |
35.0 |
0.62 |
10.5 |
| 8000 |
|
8.90 |
42.0 |
0.62 |
| 10000 |
|
10.50 |
50.0 |
0.58 |
| 12500 |
|
12.40 |
59.0 |
0.58 |
| 16000 |
|
15.00 |
73.0 |
0.54 |
| 20000 |
|
17.60 |
88.0 |
0.54 |
| 25000 |
110±2*2.5% |
20.80 |
104 |
0.50 |
| 31500 |
115±2*2.5% |
24.60 |
123 |
0.48 |
| 40000 |
121±2*2.5% |
29.40 |
148 |
0.45 |
| 50000 |
|
35.20 |
175 |
0.42 |
| 63000 |
|
41.60 |
208 |
0.38 |
| 75000 |
|
13.8
15.75
18
21 |
47.20 |
236 |
0.33 |
12-14 |
| 90000 |
|
54.40 |
272 |
0.30 |
| 120000 |
|
67.80 |
337 |
0.27 |
| 150000 |
|
80.10 |
399 |
0.24 |
| 180000 |
|
90.00 |
457 |
0.20 |
Note 1:-5% tapping position is maximum current tapping.
Note 2: For boost transformer, it is advisable to adopt non-tapping structure. If there is any requirement for operation, sub-connectors can be set up.
Note 3: When the average annual load rate of transformer is between 42% and 46%, the maximum operating efficiency can be obtained by using the loss value in the table.
| 6300kVA-63000kVA three-phase three -winding NLTC power transformer |
| Rated
Capacity
(kVA) |
Voltage Combination |
Vector Group |
No-load loss
kW |
Load loss
kW |
No load current
% |
|
| High Voltage
kV |
Med-ium Voltage
(kV) |
Low Voltage
(kV) |
Step down |
| 6300 |
|
|
|
|
8.9 |
44.00 |
0.66 |
|
| 8000 |
|
|
|
|
10.6 |
53.00 |
0.62 |
|
| 10000 |
|
|
|
|
12.6 |
62.00 |
0.59 |
|
| 12500 |
|
33 |
6.3 |
|
14.7 |
74.00 |
0.56 |
H-M |
| 16000 |
110±2*2.5% |
35 |
6.6 |
YNyn0d11 |
17.9 |
90.00 |
0.53 |
10.5 |
| 20000 |
115±2*2.5% |
37 |
10.5 |
|
21.1 |
106 |
0.53 |
H-L |
| 25000 |
121±2*2.5% |
38.5 |
11 |
|
24.6 |
126 |
0.48 |
18-19 |
| 31500 |
|
|
|
|
29.4 |
149 |
0.48 |
M-L |
| 40000 |
|
|
|
|
34.8 |
179 |
0.44 |
6.5 |
| 50000 |
|
|
|
|
41.6 |
213 |
0.44 |
|
| 63000 |
|
|
|
|
49.2 |
256 |
0.40 |
|
Note l: High, medium and low voltage winding capacity allocation is (100/100/100)% high, medium and low.
Note 2: The connection group label can be YNd11y10 as required.
Note 3: According to the user's requirement, medium voltage can be selected as different from the voltage value in the meter or with taps.
Note 4:-5% tapping position is maximum current tapping.
Note 5: For boost transformer, it is advisable to adopt non-tapping structure. If the operation requires, tapping can be set up.
Note 6: When the average annual load rate of transformer is about 45%, the maximum operating efficiency can be obtained by using the loss value in the table.
| Rated
Capacity
(kVA) |
Voltage Combination |
Vector Gourp |
No-load Loss |
Load Loss |
No Load
Current |
Short Circuit
Impedance
% |
| HV
(kV) |
LV
k(V) |
kW |
kW |
% |
| 6300 |
|
|
|
8.00 |
35.0 |
0.64 |
10.5 |
| 8000 |
|
|
|
9.60 |
42.0 |
0.64 |
| 10000 |
|
6.3
6.6
10.5
11 |
|
11.30 |
50.0 |
0.59 |
| 12500 |
|
6.6 |
|
13.40 |
59.0 |
0.59 |
| 16000 |
|
10.5 |
|
16.10 |
73.0 |
0.55 |
| 20000 |
110±8*1.25% |
11 |
YNd11 |
19.20 |
88.0 |
0.55 |
| 25000 |
|
21 |
|
22.70 |
104 |
0.51 |
| 31500 |
|
|
|
27.00 |
123 |
0.51 |
| 40000 |
|
|
|
32.30 |
156 |
0.46 |
12-18 |
| 50000 |
|
|
|
38.20 |
194 |
0.46 |
| 63000 |
|
|
|
45.40 |
232 |
0.42 |
Note 1: On-load tap-changer, temporarily providing step-down structure products.
Note 2: According to user's requirements, other voltage combination products can be provided.
Note 3:-10% tapping position is maximum current tapping.
Note 4: When the average annual load rate of transformer is between 45% and 50%, the maximum operating efficiency can be obtained by using the loss value in the table.
| 6300-63000kVA three phase two winding OLTC power transformer |
| Rated
Capacity
(kVA) |
Voltage Combination |
Vector Gourp |
No-load Loss |
Load Loss |
No Load
Current |
Short Circuit
Impedance
% |
| HV
(kV) |
LV
k(V) |
kW |
kW |
% |
| 6300 |
|
|
|
|
9.6 |
44.00 |
|
| 8000 |
|
|
|
|
11.5 |
53.00 |
|
| 10000 |
|
|
6.3 |
|
13.6 |
62.00 |
|
| 12500 |
|
33 |
6.6 |
|
16.1 |
74.00 |
H-M |
| 16000 |
|
36 |
10.5 |
|
19.3 |
90.00 |
10.5 |
| 20000 |
110±8*1.25% |
37 |
11 |
YNyn0d11 |
22.8 |
106 |
H-L |
| 25000 |
|
38.5 |
21 |
|
27.0 |
126 |
18-19 |
| 31500 |
|
|
|
|
32.1 |
149 |
M-L |
| 40000 |
|
|
|
|
38.5 |
179 |
6.5 |
| 50000 |
|
|
|
|
45.5 |
213 |
|
| 63000 |
|
|
|
|
54.1 |
256 |
|
Note 1: On-load tap-changer, temporarily providing step-down structure products.
Note 2: High, medium and low voltage winding capacity allocation is (100/100/100)% high, medium and low.
Note 3: The connection group label can be YNd11y10 as required.
Note 4:-10% tapping position is maximum current tapping.
Note 5: According to user's requirement, medium voltage can be selected as diferent from the voltage value in the meter or with Note 5: When the average annual load rate of transformer is about 47%,the maximum operating efficiency can be obtained by using the loss value in the table.
| Rated
Capacity
(kVA) |
Voltage Combination |
Vector Gourp |
No-load Loss |
Load Loss |
No Load
Current |
Short Circuit
Impedance
% |
| HV
(kV) |
LV
k(V) |
kW |
kW |
% |
| 6300 |
|
|
|
8.00 |
35.0 |
0.64 |
10.5 |
| 8000 |
|
|
|
9.60 |
42.0 |
0.64 |
| 10000 |
|
|
|
11.30 |
50.0 |
0.59 |
| 12500 |
|
6.3
6.6
10.5
11 |
|
13.40 |
59.0 |
0.59 |
| 16000 |
|
6.6 |
|
16.10 |
73.0 |
0.55 |
| 20000 |
110±8*1.25% |
10.5 |
YNd11 |
19.20 |
88.0 |
0.55 |
| 25000 |
|
11 |
|
22.70 |
104 |
0.51 |
| 31500 |
|
21 |
|
27.00 |
123 |
0.51 |
| 40000 |
|
|
|
32.30 |
156 |
0.46 |
12-18 |
| 50000 |
|
|
|
38.20 |
194 |
0.46 |
| 63000 |
|
|
|
45.40 |
232 |
0.42 |
