2500kVA Three Phase Oil Immersed Distribution Transformer 11kV to 0.433kV ANSI IEEE Standards

2500kVA  Three Phase Oil Immersed Distribution Transformer Step Down 11000V To 433V ANSI IEEE Standards

This distribution transformer is a three-phase oil immersed (oil filled) unit designed for stable power distribution applications. It is rated 2500kVA with a voltage ratio of 11kV / 0.433kV, featuring HV Delta and LV Wye-Neutral (433V, Wye‑N) connection with vector group Dyn11. The transformer adopts ONAN cooling and an off-circuit tap changer with a tapping range of ±2 × 2.5%.
It uses aluminum windings (HV/LV), a silicon steel core, and mineral oil. The tank is a coated steel bolted tank painted in RAL7033. Standard accessories include oil level indication, pressure/vacuum monitoring, pressure relief valve, oil temperature indication, filling & drain valves (with sampler), earthing terminal, and lifting lugs. Suitable for indoor or outdoor installation.

Product Photos

Main Data

Technical drawings

Standard Features

• Oil-immersed (oil-filled) distribution transformer, bolted tank design
• Three-phase, 11kV (Delta) / 433V (Wye-N), vector group Dyn11
• ONAN cooling (Oil Natural Air Natural)
• Off-circuit tapping, ±2 × 2.5%
• Coated steel tank, RAL7033 painted
• Porcelain bushings: (3) 15kV class HV bushings; (4) 1.2kV class LV bushings with 4-hole spade
• Standard accessories: oil level indicator, pressure vacuum gauge, pressure relief valve, oil temperature indicator, filling valve, drain valve with sampler, earthing terminal, lifting lugs
• Designed and tested in accordance with AS60076

Factory Tests

• Winding Resistance Test
• Insulation Resistance Test
• Voltage Ratio Error Test
• Short-circuit Impedance Test
• No-load Loss (Wattage) Test
• Load Loss (Wattage) Test
• Induced Voltage Withstand Test
• Separate Source Voltage Withstand Test
• Pressure Integrity Test Test

PRODUCT SPECIFICATION

Why Choose Us

WINLEY Electric supplies oil-filled distribution transformers meeting international requirements. We support customization and provide a complete documentation package for fast quotation and project approval.
We hold UL/cUL certification and can support UL application (partner authorization) based on customer requirements. Products are exported to many countries and regions worldwide.

FAQ

1. Q: Can I have a sample order?

A: Yes, we welcome sample order to test and check quality.

2. Q: What is the lead time?

A: Mass production time 15-25 days.

3. Q: How long is the warranty?

A: 24 monthes from B/L. If there are any accessory problems,just provide the photos of damaged accessory,then we will provide free service. According to the number of products,we will provide easily damaged accessories for free. we also can provide technical support if you need.

4. Q: Is OEM/ODM available?

A: Yes,it is! We are manufacturer with our own R&D team, we can customize products according to customer's drawing or requirements.

Customized services:

a. Customized color and special function.

b. Customized box.

c. Print customer's logo.

d. Your other ideas about product, we can help you design and put them into production. The above customized services must be confirmed before production.

5. Q: How to control the products quality?

A: Our company owns the core technology ,all kinds of products hold CE certificate. We have professional engineers. Workers are strictly required to make products according to the drawings. Each process has technical instructors.The QC supervisors will regularly inspect the production. We will do products performance tests during production, and comprehensive quality tests when the products is completed.