S9/20KV Oil-immersed transformer
Product Features:
S9 / 20 kV oil immersed power transformer adopts a new type
insulation structure, which improves the short-circuit resistance.
The iron core is made of high-quality cold-rolled grain oriented
silicon steel sheet. High and low-voltage windings are made of
high-quality oxygen-free copper wire in multi-layer cylinder
process structure. All fasteners are specially treated for anti
loose thus obtain high mechanical strength. Corrugated oil tank
shell is a permanently sealed whose own elasticity adapts to the
expansion of oil. It is widely used as important equipment in power
supply and distribution system, industrial and mining enterprises,
agriculture and civil buildings.
Technical data
Rated Capacity (kVA)
|
H.V. winding (kV)
| Tapping range of high voltage (%) | L.V. winding (kV) | Vector Group | No-Load Loss(W) | Load Loss (W) | No-load current (%) | Short-circuit impedance (%) |
| 30 | 20 | ±5*2.5% ±2*2.5% | 0.4 | Dyn11 | 90 | 660 | 2.1 | 5.5 |
| 50 | 130 | 960 | 2.0 |
| 63 | 150 | 1145 | 1.9 |
| 80 | 180 | 1370 | 1.8 |
| 100 | 200 | 1650 | 1.6 |
| 125 | 240 | 1980 | 1.5 |
| 160 | 290 | 2420 | 1.4 |
| 200 | 330 | 2860 | 1.3 |
| 250 | 400 | 3350 | 1.2 |
| 315 | 480 | 4010 | 1.1 |
| 400 | 570 | 4730 | 1.0 |
| 500 | 680 | 5660 | 1.0 |
| 630 | 810 | 6820 | 0.9 | 6.0 |
| 800 | 980 | 8250 | 0.8 |
| 1000 | 1150 | 11330 | 0.7 |
| 1250 | 1350 | 13200 | 0.7 |
| 1600 | 1630 | 15950 | 0.6 |
| 2000 | 1950 | 19140 | 0.6 |
| 2500 | 2340 | 22220 | 0.5 |
Structural characteristics
1. Core
New high-quality silicon steel sheet is adopted, mainly 0.35 thick
h18, h14, H12 and Z11 high-quality silicon steel sheet. We select
the most suitable material according to the requirements and use
conditions of customers to achieve the best design and performance
of Hengfengyou transformer.
2. Coil
Pew, UEW, EIW, seiw, FEAI enamelled wire and glass-fibre covered
wire are used for coil. The temperature resistance grade is f (155
℃), H (180 ℃), HC (200 ℃), C (220 ℃). (the conventional temperature
resistance grade is 180 ℃ of H grade).
3. Insulating materials
High temperature resistant insulating paper is used as insulating
material, which has multiple properties of high temperature
insulation, flame retardant and moisture resistance.
4.connecting terminal
For small power, we use terminal strip which is beautiful in
appearance and shows excellent pressure resistance, temperature
resistance, flame retardant performance. For high power, we use
high quality copper busbar.
Workshop
·Service conditions
1. The maximum ambient air temperature shall not exceed 40 ℃, and
the minimum shall not below - 25 ℃;
2. The altitude shall not exceed 1000m. If special customized
transformers and low-voltage components are used, the altitude can
reach 4000m;
3. The vertical inclination is no more than 5 °, and no violent
vibration and impact;
4. The air humidity is not more than 90% (+ 25 ℃);
5. No gas and conductive dust that will seriously affect the
insulation of transformer, no explosion hazard and corrosion of
electrical components;
6. Outdoor wind speed shall not exceed 35m / s.
7. If service conditions beyond the above, specially customized
product is available.
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