Shanghai Changji Electric Co., Ltd. is a professional enterprise specializing in the production of various reactors, power transformers, dry-type transformers, amorphous alloy transformers, special transformers, and box-type substations.
Equipped with modern production facilities, advanced manufacturing processes, and comprehensive testing equipment, the company ensures the production of high-performance products featuring innovative designs, low losses, low temperature rise, low noise, high impact resistance, and strong short-circuit withstand capability
Core Products:
- 10kV, 20kV, and 35kV dry-type and oil-immersed reactors
- 10kV, 20kV, and 35kV oil-immersed transformers
- 10kV, 20kV, and 35kV vacuum epoxy-cast dry-type transformers
- 10kV, 20kV, and 35kV non-encapsulated (SG) vacuum pressure-impregnated dry-type transformers
- Box-type substations
Additionally, the company can design and manufacture various special transformers according to customer requirements.
For years, the company has adhered to a customer-first philosophy, earning trust and support through a strong commitment to product quality. By continuously improving quality management and pursuing excellence, Zhejiang Changji Electric Co., Ltd. strives to secure its market position. With full enthusiasm, sincere cooperation, and a win-win business approach, we warmly welcome domestic and international customers to visit, inquire, and discuss potential collaborations!
2500KVA 13.8/0.415KV Pad Mounted Transformer
1. Introduction
The 2500KVA pad mounted transformer is a crucial piece of electrical equipment widely used in power distribution systems. With its high capacity and reliable performance, it plays a vital role in transforming high - voltage electricity from the grid into low - voltage electricity suitable for various end - users. This detailed specification will provide in - depth information about the 2500KVA pad mounted transformer.
2. Technical Parameters
2.1 Capacity
The transformer has a rated capacity of 2500KVA, which means it can handle a relatively large amount of electrical power. This high capacity makes it suitable for applications in commercial areas, industrial complexes, and large residential communities where a significant amount of electricity is required.
2.2 Voltage Ratings
- High - voltage side: The rated voltage on the high - voltage side is 13.8KV. This voltage level is commonly used in medium - voltage power distribution networks. It allows the transformer to connect to the main power grid and receive high - voltage electricity efficiently.
- Low - voltage side: The rated voltage on the low - voltage side is 0.415KV. This is the standard low - voltage level used for most electrical equipment in buildings and industrial facilities. The transformer steps down the high - voltage electricity to this safe and usable level.
2.3 Frequency
The transformer is designed to operate at a frequency of 50Hz or 60Hz, depending on the local power grid requirements. This frequency compatibility ensures that the transformer can be used in different regions around the world.
2.4 Winding Connection
- High - voltage winding: The high - voltage winding is usually connected in a delta configuration. This connection provides a stable and reliable way to handle high - voltage electricity and helps to reduce the impact of unbalanced loads.
- Low - voltage winding: The low - voltage winding is typically connected in a star configuration with a neutral point. This configuration is suitable for supplying single - phase and three - phase loads and provides a stable voltage supply.
2.5 Impedance
The impedance of the 2500KVA pad mounted transformer is designed to be within a certain range. The impedance value affects the short - circuit current and the voltage regulation of the transformer. A proper impedance value ensures that the transformer can operate safely under normal and fault conditions.
3. Construction and Design
3.1 Enclosure
The transformer is housed in a pad - mounted enclosure. This enclosure is made of high - quality steel or other suitable materials, which provides excellent protection against environmental factors such as rain, dust, and vandalism. The enclosure is designed to be weather - resistant and has a low - profile design, making it suitable for installation in outdoor areas without taking up too much space.
3.2 Cooling System
- Natural cooling: The 2500KVA pad mounted transformer usually uses natural cooling methods, such as oil - immersed self - cooling (ONAN). The transformer is filled with high - quality insulating oil, which not only provides electrical insulation but also helps to dissipate heat. The natural circulation of the oil transfers the heat generated by the transformer to the enclosure, where it is dissipated into the surrounding air.
- Forced cooling (optional): In some cases, forced cooling systems such as oil - immersed forced - air cooling (ONAF) can be used to increase the cooling capacity of the transformer. This is especially useful when the transformer is operating under heavy loads or in high - temperature environments.
3.3 Tap Changer
The transformer is equipped with a tap changer, which allows for voltage regulation. The tap changer can adjust the turns ratio of the high - voltage winding, thereby changing the output voltage of the transformer. This is important for maintaining a stable voltage supply, especially when the input voltage of the grid fluctuates.
3.4 Protection Devices
- Over - current protection: The transformer is equipped with over - current protection devices, such as fuses or circuit breakers. These devices can detect excessive current flowing through the transformer and automatically disconnect the circuit to prevent damage to the transformer.
- Over - temperature protection: Temperature sensors are installed inside the transformer to monitor the temperature of the oil and the windings. If the temperature exceeds a certain limit, the protection system will take appropriate actions, such as sending an alarm signal or disconnecting the transformer.
4. Installation and Maintenance
4.1 Installation
- Site selection: The pad mounted transformer should be installed on a flat and stable foundation. The installation site should be away from sources of heat, moisture, and flammable materials. It should also be easily accessible for maintenance and inspection.
- Connection: The high - voltage and low - voltage cables should be properly connected to the transformer terminals according to the electrical wiring diagram. The grounding system should be installed correctly to ensure the safety of the transformer and the surrounding equipment.
4.2 Maintenance
- Regular inspection: Regular inspections should be carried out to check the condition of the transformer enclosure, cooling system, tap changer, and protection devices. The oil level and quality should also be checked regularly, and samples should be taken for analysis if necessary.
- Oil replacement: The insulating oil in the transformer should be replaced periodically to maintain its insulating properties. The frequency of oil replacement depends on the operating conditions of the transformer.
- Testing: Various tests, such as insulation resistance testing, turn - ratio testing, and short - circuit impedance testing, should be carried out at regular intervals to ensure the proper operation of the transformer.
5. Applications
The 2500KVA pad mounted transformer is widely used in the following applications:
5.1 Commercial Buildings
In shopping malls, office buildings, and hotels, the transformer can provide a stable power supply for lighting, air - conditioning systems, elevators, and other electrical equipment.
5.2 Industrial Facilities
Industrial complexes require a large amount of electricity for their production processes. The 2500KVA pad mounted transformer can step down the high - voltage electricity from the grid to a suitable level for industrial machinery and equipment.
5.3 Residential Areas
In large residential communities, the transformer can distribute electricity to individual households, ensuring a reliable power supply for lighting, appliances, and other electrical devices.
6. Safety Considerations
6.1 Electrical Safety
- Insulation: The transformer is designed with high - quality insulation materials to prevent electrical leakage and short - circuits. The insulation resistance of the transformer should be regularly tested to ensure its safety.
- Grounding: A proper grounding system is essential for the safety of the transformer. The grounding conductor should be connected to the transformer enclosure and all metal parts to prevent electrical shock in case of a fault.
6.2 Fire Safety
- Flammable materials: The transformer should be installed away from flammable materials, and the enclosure should be designed to prevent the spread of fire in case of an internal fault.
- Fire - extinguishing equipment: Fire - extinguishing equipment should be available near the transformer installation site, and personnel should be trained on how to use it in case of a fire emergency.
In conclusion, the 2500KVA 13.8/0.415KV pad mounted transformer is a reliable and efficient electrical equipment with a wide range of applications. Its high capacity, stable performance, and advanced protection features make it an ideal choice for power distribution systems. By following the installation and maintenance guidelines, users can ensure the long - term and safe operation of the transformer.
2000KVA 13.8/0.415KV pad mounted transformer
| No. |
Description |
Unit |
Guarantee |
| A |
GENERAL |
|
|
| 1 |
Manufacturing standards |
|
C57.12.00-2010 |
| 2 |
Type |
|
American transformer 2000/13.8-0.415 |
| 3 |
Rated Capacity |
kVA |
2000 |
| 4 |
a) On HV side |
|
|
| |
Rated voltage: |
kV |
13.8 |
| |
Rated current: |
A |
83.68 |
| |
b) On LV side |
|
|
| |
Rated voltage: |
kV |
0.415 |
| |
Rated current: |
A |
2782.49 |
| 5 |
Rated frequency |
Hz |
60 |
| 6 |
Connection symbol |
|
Dyn11 |
| 7 |
Short circuit impedance |
% |
5.5 |
| 8 |
Tapping method |
|
ON-circuit-tap-changing(OLTC) |
| 9 |
Tapping range |
|
±2*2.5% |
| 10 |
Maximum temperature rise at rated power: |
|
|
| |
a)Maximum winding temperature rise |
K |
65 |
| |
b)Maximum oil Temperature rise |
K |
55 |
| |
c) Hot spot temperature |
ºC |
105 |
| |
d) Core and contruction rise |
K |
70 |
| 11 |
No load loss |
kW |
2.52 |
| 12 |
Load losses at 75 °C |
kW |
17.8 |
| 13 |
Total losses at 75°C |
kW |
20.4 |
| 14 |
Insulation level |
|
|
| |
a) HV side |
KV |
105/45 |
| |
b) LV side |
KV |
5 |
| 15 |
Maximum flux density in Core |
Tesla |
1.58 |
| 16 |
Sound level (sound pressure level) |
dB |
63 |
| 17 |
Cooling |
|
AN/ON |
| 18 |
Permissible duration of occasional Overload |
hrs. |
60Min |
| |
d) Level of Insulating material |
Class |
A |
| 19 |
Thickness of Transformer Tank: |
|
|
| |
a)material |
|
cold-rolled plate |
| |
b)Bottom |
mm |
8 |
| |
c)Sides |
mm |
6 |
| |
d)Corrugated wall or radiator |
mm |
2 |
| 20 |
Weights |
|
|
| |
a. Net weight of insulating oil |
liters |
810 |
| |
b. Weight of activepart |
kgs |
2600 |
| |
c. Weight of the largest shipping package |
kgs |
4900 |
| 21 |
Transformer dimensions including all fittings: |
|
|
| |
a) Height |
mm |
1800 |
| |
b) Breadth |
mm |
2000 |
| |
c) Length |
mm |
2500 |
| 22 |
Color of transformer |
|
Green |
| |
Accessories/Fittings supplied |
|
|
| 2 |
Oil level Indicator |
Yes/no |
Y |
| 3 |
Conservator with buchholz relay(Sixin) |
Yes/no |
Y |
| 4 |
Pressure relieve device |
yes/no |
Y |
| 5 |
Conservator |
yes/no |
N |
| 6 |
Support lugs |
Yes/no |
Y |
| 7 |
Lifting lugs |
Yes/no |
Y |
| 8 |
Earthing terminals for tanks |
Yes/no |
Y |
| 10 |
Rating plates |
Yes/no |
Y |
| 11 |
Load switch |
Yes/no |
Y |
| 12 |
Fuse |
Yes/no |
Y |
| B |
SERVICE CONDITION |
|
|
| 1 |
Altitude |
Meters |
≤2500 |
| 2 |
Temperatures |
Degree |
-45~+45 ºC |
| C |
Incoming and outgoing line mode |
|
bottom by cable |
Shanghai Changji Electric Co., Ltd. is a professional enterprise specializing in the production of various reactors, power transformers, dry-type transformers, amorphous alloy transformers, special transformers, and box-type substations.
For years, the company has adhered to a customer-first philosophy, earning trust and support through a strong commitment to product quality. By continuously improving quality management and pursuing excellence, Zhejiang Changji Electric Co., Ltd. Strives to secure its market position. With full enthusiasm, sincere cooperation, and a win-win business approach, we warmly welcome domestic and international customers to visit, inquire, and discuss potential collaborations!
Equipped with modern production facilities, advanced manufacturing processes, and comprehensive testing equipment, the company ensures the production of high-performance products featuring innovative designs, low losses, low temperature rise, low noise, high impact resistance, and strong short-circuit withstand capability.
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