Product Introduction
In power grid distribution systems, the 250 KVA 3 Phase Transformer is a widely used model designed to step down high voltage to a low voltage level suitable for end-user applications. This transformer typically adopts the Dyn11 connection configuration: the high-voltage side uses a delta connection to suppress harmonics, while the low-voltage side features a star connection with neutral grounding. This design accommodates both single-phase and three-phase loads, enabling rapid protection against unbalanced currents and short circuits. With a rated capacity of 250 KVA, the transformer can deliver an effective power output ranging from 187KW to 225KW.
Hozee Electric adheres to stringent quality management and process control measures to ensure every delivered transformer meets rigorous quality standards, achieving a 100% pass rate in acceptance testing. To date, we have maintained a zero-failure factory record, earning high recognition from customers and the market. Our transformers, including the 250 KVA 3 Phase Transformer, are designed in compliance with major international standards such as IEC, ANSI, and DOE.
Scope of Supply
Product: Distribution Transformer
Number of Phases: 3 Phase
Rated Power: 50-3150 KVA 3 Phase Transformer
Primary Voltage: 11KV
Secondary Voltage: 400V
Vector Group: Dyn11
Customizable Production: Available
Customizable production
The evolving power supply environment and diversified electricity demands call for tailored transformer solutions. Our company offers customized production services for transformers based on specific customer requirements. Upon receiving the technical documents provided by the customer, our technical team will issue a technical response within 24-48 hours. After confirming the technical specifications, sample production can be completed in approximately 10 days for customer inspection and acceptance. Delivery times for bulk orders are negotiable between both parties.
Product advantages
Moderate load capacity
Energy saving and efficient
Stable and reliable operation
Strong environmental adaptability
Easy installation and maintenance
Good power supply quality
Application scenarios
1, Small and medium-sized commercial and public service facilities
Shopping malls, supermarkets, and street shops
Hotels and dining establishments
Office buildings and office buildings
01
2, Small and medium-sized industrial and processing enterprises
Small scale processing plant
Light Industry Workshop
Agricultural processing facilities
02
3, Infrastructure and Public Utilities
Rural and community power distribution
Municipal and Public Facilities
Temporary power supply scenario
03
4, Special field applications
New energy supporting facilities
Medical and Laboratory
Transportation supporting facilities
04
5, Other scenes
Ships and mobile devices
05
Technical Specification for Single phase Transformer
|
Model |
S-M-250kVA-11/0.4 |
|
Type |
Oil Immersed Power Transformer |
|
Standard |
IEC60076 |
|
Rated Power |
250kVA |
|
Frequency |
50HZ |
|
Phase |
Three |
|
Cooling Type |
ONAN |
|
Primary Voltage |
11 KV |
|
Secondary Voltage |
0.4KV |
|
Winding Material |
Copper |
|
Vector Group |
Dyn11 |
|
Impedance |
4% |
|
Tap Changer |
NLTC |
|
Tapping Range |
±2*2.5% @ Primary Side |
|
No Load Loss |
0.40 KW |
|
On Load Loss |
3.2KW |
|
Accessories |
Standard Configuration |
Transformer Process Flow Diagram
Transformer drawings
Engineers at Hozee Electric design transformer drawings based on customer customization requirements to ensure precise alignment with technical specifications.
Drying of transformer body
Specific benefits of transformer body drying:
Enhances insulation performance and prevents insulation breakdown
Reduces dielectric loss and improves operational efficiency
Prevents rusting of the iron core and windings, extending service life
Ensures the effectiveness of the impregnation process and enhances overall insulation integrity
Avoids low-temperature freezing and subsequent structural damage
Facilitates insulation testing to guarantee product quality
Transformer testing and inspection
Container shipping:
Adopting an iron frame structure, transformers are placed on two levels, ensuring the safety of transformer transportation while effectively utilizing space and reducing shipping costs
FAQ
Q: What is the purpose of UL certification?
A: UL certification, issued by Underwriters Laboratories (USA), is a mandatory safety certification for electrical products in the North American market. Transformers without this certification may be detained by customs or banned from the market. Additionally, UL certification signifies that the product's design, materials, and manufacturing processes comply with U.S. safety standards, reducing risks of equipment failure and fire hazards while providing safety assurance and credibility.
Q: What certification is required for transformers exported to Canada?
A: Transformers exported to Canada must comply with Canadian electrical safety standards (e.g., CSA standards) and obtain certification from the Canadian Energy Efficiency Management Agency to ensure compliance with national energy policies. All our products have passed relevant certifications, enabling worry-free procurement.
Q: What are the types of transformers?
A: Transformers are classified by phase (single-phase and three-phase), purpose (power transformers, specialized transformers, voltage-regulating transformers, measuring transformers such as potential and current transformers), cooling method (oil-immersed and air-cooled), and insulation medium (oil-immersed, dry-type, gas-insulated, etc.).
Q: Why can't transformers operate under overload?
A: Overload operation refers to exceeding the rated current specified on the nameplate. Under special circumstances, short-term overload should not exceed 30% of the rated load in winter and 15% in summer. Long-term overload accelerates transformer aging, shortens service life, and may even cause malfunctions.
Q: What factors affect the service life of transformers?
A: Service life is influenced by manufacturing quality (high-quality materials and precision processes extend lifespan), load conditions (overload accelerates aging; rated or light loads preserve lifespan), maintenance practices (regular maintenance prevents failures), and environmental factors (high temperature, humidity, and pollution accelerate insulation aging).
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