2.5MVA Substation Power Transformer Conservator Type Oil Immersed Step Down

Product Specification

2.5MVA Substation Power Transformer Conservator Type Oil immersed Step Down 24940V To 480V ANSI IEEE Standards

This Substation Power Transformer is a liquid-filled, pad-mounted, conservator type designed for reliable three-phase radial feed applications. With a capacity of 2.5 to 3.1 MVA and a vector group of DYN1, it supports both step-up and step-down operations. The transformer operates at a primary voltage of 24,940V (25 kV class) with a delta phasor and secondary voltage of 480Y/277V (1.2 kV class) with a wye-neutral configuration. It features a primary BIL of 110 kV and secondary BIL of 30 kV, operates at 60 Hz, and maintains a 55°C temperature rise with Class E insulation rated for 120°C. The cooling class is KNAN/KNAF, and it meets ANSI/IEEE efficiency standards, ensuring high performance and durability in demanding power distribution environments.

Product Photos

Main Data

Technical drawings

Standard Features

• Conservator type, liquid-filled, pad-mounted substation transformer
• Three-phase radial feed, supports step-up and step-down use
• Durable coated steel tank and cabinet with weatherproof epoxy finish
• Analog gauges for oil level, temperature, and pressure monitoring
• Automatic pressure relief, Buchholz relay, and gas sampler included
• Forced air cooling with fan controls (auto/off/manual)
• 5-position off-load tap changer on high voltage side, 2.5% steps
• Live front primary and secondary connections with NEMA H-Spade terminals
• Copper windings and grain-oriented steel core
• Tamper-proof, pad-lockable doors with hot stick included
• NEMA 3R weatherproof wiring cabinet, seismic rated
• Designed for -40°C to +40°C operation, low noise (65 dBA)
• Meets ANSI/IEEE, DOE, CSA, ASTM standards for safety and efficiency

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 offers a complete line of liquidfilled distribution transformers that meet current applicble ANSI, IEEE, CSA, AS, DOE standards. With high voltages up to 44 kV and ratings up to 20 MVA. WINLEY has obtained UL/cUL certification (Certificate Number: UL-US-2431836-0, UL-CA-2423202-0), and can apply for UL (partner authorization) according to customer requirements.

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.