0102030405
66-110kV Oil Immersed Power Transformer - High Efficiency from China Suppliers & Factory
Product Features
Low loss
Electrical calculation by sophisticated computer programs, combine electrical shielding and magnetic circuit technology.
The core is made of cold rolled, grain orientation high magnetic silicon steel, to reduce the load loss and no-load current.
Low partial discharge
HV lead adopts specially molded insulation parts which effectively ensure the insulation strength and reduces partial discharge.
High strength
The tank can withstand the vacuum test and positive pressure test.
Omni directional location between the core and the tank to guarantee the horizontal position during transportation and operation.
Low Noise
The step lapped joints of the core laminations reduce the additional losses arising in the corner portions, reduce the load current and electromagnetic noise.
Reduce of the flux density and increase the shock absorbing measures at design to reduce the noise.
Maintenance-free
Adopts the bell type tank and the international leading technology, ensure 30 years durability, and maintenance-free operation.
Transformer body assembly
Date Sheet of Typical Products
The energy efficiency level of 66 kV oil-immersed three-phase double-winding no-load tap-changing power transformer
Rated capacity |
Level Ⅰ |
Level Ⅱ |
Level Ⅲ |
short circuit impedance |
|||
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
||
3150 |
2.2 |
20.7 |
2.6 |
20.7 |
3.2 |
21.9 |
8 |
4000 |
2.6 |
24.6 |
3.1 |
24.6 |
3.8 |
25.9 |
|
5000 |
3.1 |
27.6 |
3.7 |
27.6 |
4.6 |
29.2 |
|
6300 |
4.0 |
30.8 |
4.7 |
30.8 |
5.8 |
32.5 |
9 |
8000 |
4.9 |
36.5 |
5.8 |
36.5 |
7.1 |
38.5 |
|
10000 |
5.8 |
43.0 |
6.8 |
43.0 |
8.4 |
45.4 |
|
12500 |
6.8 |
51.1 |
8.1 |
51.1 |
9.9 |
54.0 |
|
16000 |
8.3 |
62.8 |
9.8 |
62.8 |
12.0 |
66.3 |
|
20000 |
9.7 |
76.1 |
11.4 |
76.1 |
14.1 |
80.4 |
|
25000 |
11.4 |
90.0 |
13.5 |
90.0 |
16.6 |
95.0 |
|
31500 |
13.5 |
108.0 |
16.0 |
108.0 |
19.7 |
114.0 |
|
40000 |
16.2 |
126.9 |
19.1 |
126.9 |
23.5 |
134.0 |
|
50000 |
19.4 |
150.3 |
22.9 |
150.3 |
28.2 |
158.7 |
|
63000 |
22.9 |
178.2 |
27.0 |
178.2 |
33.3 |
188.1 |
|
The energy efficiency level of 66 kV oil-immersed three-phase double-winding OLTC power transformer
Rated capacity |
Level Ⅰ |
Level Ⅱ |
Level Ⅲ |
short circuit impedance |
|||
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
||
6300 |
4.4 |
30.8 |
5.2 |
30.8 |
6.4 |
32.5 |
9 |
8000 |
5.3 |
36.5 |
6.2 |
36.5 |
7.7 |
38.5 |
|
10000 |
6.2 |
43.0 |
7.3 |
43.0 |
9.0 |
45.4 |
|
12500 |
7.4 |
51.1 |
8.7 |
51.1 |
10.7 |
54.0 |
|
16000 |
8.9 |
62.8 |
10.5 |
62.8 |
12.9 |
66.3 |
|
20000 |
10.6 |
76.1 |
12.5 |
76.1 |
15.4 |
80.4 |
|
25000 |
12.5 |
90.0 |
14.8 |
90.0 |
18.2 |
95.0 |
|
31500 |
14.8 |
108.0 |
17.5 |
108.0 |
21.5 |
114.0 |
|
40000 |
17.7 |
126.9 |
20.9 |
126.9 |
25.8 |
134.0 |
|
50000 |
20.9 |
150.3 |
24.7 |
150.3 |
30.4 |
158.7 |
|
63000 |
24.7 |
178.2 |
29.2 |
178.2 |
35.9 |
188.1 |
|
The energy efficiency level of 110 kV oil-immersed three-phase double-winding no-load tap-changing power transformer
Rated capacity |
Level Ⅰ |
Level Ⅱ |
Level Ⅲ |
short circuit impedance |
|||
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
||
6300 |
4.1 |
32 |
4.8 |
32 |
5.9 |
33 |
10.5 |
8000 |
4.9 |
38 |
5.8 |
38 |
7.1 |
40 |
|
10000 |
5.8 |
45 |
6.8 |
45 |
8.4 |
48 |
|
12500 |
6.8 |
53 |
8.1 |
53 |
9.9 |
56 |
|
16000 |
8.3 |
65.7 |
9.8 |
65.7 |
12.0 |
69 |
|
20000 |
9.7 |
79 |
11.4 |
79 |
14.1 |
84 |
|
25000 |
11.4 |
94 |
13.5 |
94 |
16.6 |
99 |
|
31500 |
13.5 |
111 |
16.0 |
111 |
19.7 |
117 |
|
40000 |
16.2 |
133 |
19.1 |
133 |
23.5 |
141 |
|
50000 |
19.4 |
158 |
22.9 |
158 |
28.2 |
166 |
|
63000 |
22.9 |
187 |
27.0 |
187 |
33.3 |
198 |
|
75000 |
26.0 |
212 |
30.7 |
212 |
37.8 |
224 |
12～14 |
90000 |
29.9 |
245 |
35.4 |
245 |
43.5 |
258 |
|
120000 |
37.3 |
303 |
44.1 |
303 |
54.2 |
320 |
|
150000 |
44.1 |
359 |
52.1 |
359 |
64.1 |
379 |
|
180000 |
49.5 |
411 |
58.5 |
411 |
72.0 |
434 |
|
The energy efficiency level of 110 kV oil-immersed three-phase double-winding LV-35kV no-load tap-changing power transformer
Rated capacity |
Level Ⅰ |
Level Ⅱ |
Level Ⅲ |
short circuit impedance |
|||
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
||
6300 |
4.4 |
33 |
5.2 |
33 |
6.4 |
35 |
10.5 |
8000 |
5.3 |
40 |
6.2 |
40 |
7.7 |
42 |
|
10000 |
6.2 |
47 |
7.3 |
47 |
9.0 |
49 |
|
12500 |
7.2 |
56 |
8.5 |
56 |
10.5 |
59 |
|
16000 |
8.6 |
68 |
10.1 |
68 |
12.5 |
72 |
|
20000 |
10.2 |
85 |
12.0 |
85 |
14.8 |
89 |
|
25000 |
12.1 |
99 |
14.2 |
99 |
17.5 |
105 |
|
31500 |
14.3 |
120 |
16.8 |
120 |
20.7 |
126 |
|
40000 |
16.9 |
140 |
20.0 |
140 |
24.6 |
147 |
|
50000 |
20.3 |
174 |
24.0 |
174 |
29.5 |
183 |
|
63000 |
24.0 |
209 |
28.3 |
209 |
34.9 |
220 |
|
6300 |
4.4 |
33 |
5.2 |
33 |
6.4 |
35 |
|
8000 |
5.3 |
40 |
6.2 |
40 |
7.7 |
42 |
|
10000 |
6.2 |
47 |
7.3 |
47 |
9.0 |
49 |
|
The energy efficiency level of 110 kV oil-immersed three-phase three-winding no-load tap-changing power transformer
Rated capacity |
Level Ⅰ |
Level Ⅱ |
Level Ⅲ |
short circuit impedance |
||||
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
Set up voltage |
Set down voltage |
|
6300 |
4.9 |
40 |
5.8 |
40 |
7.1 |
42 |
H-M:17.5~18.5 H-L:10.5 M-L:6.5 |
H-M:10.5 H-L:17.5~18.5 M-L:6.5 |
8000 |
5.8 |
48 |
6.9 |
48 |
8.5 |
50 |
||
10000 |
6.9 |
56 |
8.2 |
56 |
10.1 |
59 |
||
12500 |
8.1 |
67 |
9.6 |
67 |
11.8 |
70 |
||
16000 |
9.8 |
81 |
11.6 |
81 |
14.3 |
86 |
||
20000 |
11.6 |
95 |
13.7 |
95 |
16.9 |
101 |
||
25000 |
13.5 |
113 |
16.0 |
113 |
19.7 |
120 |
||
31500 |
16.2 |
134 |
19.1 |
134 |
23.5 |
142 |
H-M:17.5~18.5 H-L:10.5 M-L:6.5 |
H-M:10.5 H-L:17.5~18.5 M-L:6.5 |
40000 |
19.1 |
161 |
22.6 |
161 |
27.8 |
170 |
||
50000 |
22.9 |
192 |
27.0 |
192 |
33.3 |
202 |
||
63000 |
27.1 |
230 |
32.0 |
230 |
39.4 |
243 |
||
6300 |
4.9 |
40 |
5.8 |
40 |
7.1 |
42 |
||
The energy efficiency level of 110 kV oil-immersed three-phase double-winding OLTC power transformer
Rated capacity |
Level Ⅰ |
Level Ⅱ |
Level Ⅲ |
short circuit impedance |
|||
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
||
6300 |
4.4 |
32 |
5.2 |
32 |
6.4 |
33 |
10.5 |
8000 |
5.3 |
38 |
6.2 |
38 |
7.7 |
40 |
|
10000 |
6.2 |
45 |
7.3 |
45 |
9.0 |
48 |
|
12500 |
7.4 |
53 |
8.7 |
53 |
10.7 |
56 |
|
16000 |
8.9 |
66 |
10.5 |
66 |
12.9 |
69 |
|
20000 |
10.6 |
79 |
12.5 |
79 |
15.4 |
84 |
|
25000 |
12.5 |
94 |
14.8 |
94 |
18.2 |
99 |
|
31500 |
14.9 |
111 |
17.6 |
111 |
21.6 |
117 |
|
40000 |
17.8 |
140 |
21.0 |
140 |
25.8 |
148 |
|
50000 |
21.0 |
175 |
24.8 |
175 |
30.6 |
184 |
|
63000 |
25.0 |
209 |
29.5 |
209 |
36.3 |
220 |
|
The energy efficiency level of 110 kV oil-immersed three-phase three-winding OLTC power transformer
Rated capacity |
Level Ⅰ |
Level Ⅱ |
Level Ⅲ |
short circuit impedance |
|||
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
No-Load Loss |
Load Loss (75℃) |
||
6300 |
5.3 |
40 |
6.2 |
40 |
7.7 |
42 |
H-M:10.5 H-L:17.5~18.5 M-L:6.5 |
8000 |
6.3 |
48 |
7.5 |
48 |
9.2 |
50 |
|
10000 |
7.5 |
56 |
8.8 |
56 |
10.9 |
59 |
|
12500 |
8.9 |
67 |
10.5 |
67 |
12.9 |
70 |
|
16000 |
10.6 |
81 |
12.5 |
81 |
15.4 |
86 |
|
20000 |
12.5 |
95 |
14.8 |
95 |
18.2 |
101 |
|
25000 |
14.9 |
113 |
17.6 |
113 |
21.6 |
120 |
|
31500 |
17.7 |
134 |
20.9 |
134 |
25.7 |
142 |
|
40000 |
21.2 |
161 |
25.0 |
161 |
30.8 |
170 |
|
50000 |
25.0 |
192 |
29.6 |
192 |
36.4 |
202 |
|
63000 |
29.8 |
230 |
35.2 |
230 |
43.3 |
243 |
|
Frequently Asked Questions
Q1: How do these transformers achieve low loss and low no-load current?
A1: The core is manufactured using cold-rolled, grain-oriented high magnetic silicon steel. Additionally, sophisticated computer programs are used to calculate and combine electrical shielding with magnetic circuit technology to minimize load loss and no-load current.
Q2: What design features contribute to the low noise level of these power transformers?
A2: The core laminations utilize step-lapped joints to reduce additional losses in corner portions, decreasing load current and electromagnetic noise. We also reduce flux density and apply shock-absorbing measures at the design stage to further minimize noise.
Q3: How is the risk of partial discharge managed in high voltage operations?
A3: The High Voltage (HV) lead is designed with specially molded insulation parts. These parts effectively secure insulation strength and significantly reduce partial discharge during operation.
Q4: Are these oil-immersed transformers structurally reinforced for transport and installation?
A4: Yes, the tank is designed to withstand both vacuum and positive pressure tests. An omni-directional location system between the core and the tank guarantees that the horizontal position is securely maintained during transportation and field operations.
Q5: What makes these transformers maintenance-free?
A5: By incorporating a bell-type tank and international leading manufacturing technologies, these transformers are built for a durability of 30 years, ensuring long-term, maintenance-free operation.
Q6: What is the difference between Level I, Level II, and Level III energy efficiency levels?
A6: These levels correspond to standard energy efficiency grades. Level I represents the highest efficiency with the lowest no-load and load losses, while Level II and Level III have higher loss parameters as detailed in our typical product data sheets.