11kV/500kVA Three Phase Outdoor Type Oil Immersed Distribution Transformer
The 11kV/500kVA three - phase outdoor - type oil - immersed distribution transformer is a highly efficient power equipment designed specifically for outdoor power distribution applications. It is intended to reliably convert medium - voltage power into low - voltage power suitable for various commercial and industrial uses. Its design fully takes into account the harsh requirements of outdoor environments, ensuring stable operation under different climatic and operating conditions.
I. Structure and Design
-Tank: It is made of high - strength steel plates, featuring excellent mechanical strength and tight sealing. This can effectively resist the erosion of wind, sand, and rain outdoors, preventing moisture and dust from entering the interior of the transformer and ensuring the normal operation of internal components. The surface of the tank is treated with special anti - corrosion measures, further extending the service life of the equipment.
-Core: High - permeability high - quality silicon steel sheets are selected. Through a special lamination process, the hysteresis loss and eddy - current loss of the core are reduced, improving the efficiency of the transformer. The core adopts a fully inclined joint structure, which reduces the vibration and noise of the core and enhances the stability of the core.
-Windings: The windings are wound with high - purity copper or aluminum wires, which have good electrical conductivity and mechanical strength. According to different voltage levels and capacity requirements, the windings are wound in different ways to ensure the electrical and heat - dissipation performance of the windings. The outside of the windings is wrapped with insulating materials to provide reliable electrical insulation.
II. Performance Characteristics
-High - efficiency and Energy - saving: Through optimized design and the selection of high - quality materials, both the no - load loss and load loss of this transformer are lower than the national standards, effectively reducing the operating costs of the power system and improving energy utilization efficiency.
-Strong Overload Capacity: It has a strong overload capacity and can withstand loads exceeding the rated capacity for a short time to meet the power demand in sudden situations.
-Good Heat - dissipation Performance: The oil - immersed design enables the heat inside the transformer to be quickly transferred to the tank surface through the transformer oil, and then dissipated into the surrounding environment through natural convection or air - cooling. The tank surface is usually equipped with heat - dissipation fins, further increasing the heat - dissipation area and improving the heat - dissipation efficiency.
-Stable and Reliable Operation: After strict factory - testing and quality control, it is ensured that the transformer can operate stably under various working conditions, reducing the probability of failures and improving power supply reliability.
III. Technical Parameters
-Rated Capacity: 500kVA
-Rated Voltage: 11kV on the high - voltage side, and the low - voltage side can be customized according to user requirements, with common ones such as 0.4kV.
Rated
Capacity
(KVA) |
Voltage Combination |
Vector
Group |
No-load
Loss(KW) |
Load
Loss
(KW) |
No-load
Current
% |
Short-circuit
Impedance |
Weight (KG) |
High Voltage
(KA) |
High Voltage Tapping Range |
Low Voltage
(KA) |
Oil Weight |
Gross Weight |
| 30 |
20-10 |
±5x2.5%
±2x2.5% |
0.4 |
Dyn11 |
0.09 |
0.66 |
2.1 |
5.5 |
180 |
420 |
| 50 |
0.13 |
0.96 |
2 |
150 |
495 |
| 63 |
0.15 |
1.145 |
1.9 |
170 |
560 |
| 80 |
0.18 |
1.37 |
1.8 |
190 |
635 |
| 100 |
0.20 |
1.65 |
1.6 |
215 |
710 |
| 125 |
0.24 |
1.98 |
1.5 |
250 |
840 |
| 160 |
0.29 |
2.42 |
1.4 |
285 |
945 |
| 200 |
0.33 |
2.86 |
1.3 |
340 |
1125 |
| 250 |
0.40 |
3.35 |
1.2 |
390 |
1295 |
| 400 |
0.57 |
4.01 |
1.1 |
445 |
1475 |
| 500 |
0.57 |
4.73 |
1.0 |
6.0 |
515 |
1712 |
| 630 |
0.68 |
5.66 |
1.0 |
460 |
1995 |
| 800 |
0.81 |
6.82 |
0.9 |
565 |
2450 |
| 1000 |
0.98 |
8.25 |
0.8 |
635 |
2765 |
| 1250 |
1.15 |
11.33 |
0.7 |
840 |
3650 |
| 1600 |
1.35 |
13.20 |
0.7 |
970 |
4220 |
| 2000 |
1.63 |
15.95 |
0.6 |
1105 |
4800 |
| 2500 |
1.95 |
19.14 |
0.6 |
1205 |
5240 |
1. Power Capacity
The power capacity of the transformer ranges from 25 kVA to 2500 kVA, catering to a wide spectrum of power requirements across various industrial and commercial applications.
2. Voltage Level
Available voltage levels include 10 kV, 11 kV, 13.8 kV, 15 kV, 17.5 kV, 20 kV, 22 kV, 24 kV, 30 kV, 33 kV, 35 kV, 36 kV. Additionally, custom voltage levels can be provided to meet specific customer demands, ensuring seamless integration into diverse power systems.
3. Type of Voltage Regulation
Two voltage regulation options are offered: off - circuit voltage regulation, which is suitable for applications where the voltage adjustment does not require continuous operation during load; and on - load voltage regulation, designed for scenarios demanding real - time voltage adjustment while the transformer is under load.
4. Tapping Range
The tapping range options are ±5 %, ±2x2.5 %, and ±4x2.5 %. These settings allow for precise voltage control, compensating for voltage fluctuations in the power grid and ensuring stable power output.
5. Frequency
The transformer can operate at a frequency of either 50 Hz or 60 Hz, making it adaptable to power systems worldwide, whether in regions following the European standard (50 Hz) or those adhering to the North American standard (60 Hz).
6. Phases
Both three - phase and single - phase configurations are available. Three - phase transformers are commonly used in large - scale industrial and commercial applications due to their higher power - handling capacity and efficiency, while single - phase transformers are suitable for smaller - scale, residential, or specific single - phase load applications.
7. Connection Symbol
Standard connection symbols include Dyn11 and Yyn0. However, other connection symbols can be provided upon customer request, enabling the transformer to be configured according to the requirements of different electrical systems.
8. Short - circuit Impedance
The short - circuit impedance is designed to meet the standard impedance requirements. This parameter is crucial for protecting the transformer and the connected electrical equipment during short - circuit events, ensuring the safety and reliability of the power system.
9. Operating Conditions
The recommended operating altitude is not to exceed 1000 m, and the ambient temperature should not exceed 40°C. In cases where these conditions cannot be met, the transformer's parameters will be modulated in strict accordance with relevant standards. This ensures that the transformer can still function optimally under non - standard environmental conditions.
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