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2500KVA Three Phase Pad Mounted Transformer

The 2500 kVA Three-Phase Pad-Mounted Transformer delivers dependable medium-voltage distribution in a compact, tamper-resistant enclosure. Certified to IEEE, CSA, DOE, and UL/cUL standards, it handles up to 34.5 kV primary feeds and steps down to customer-specified secondaries (e.g., 4 160Y/240 V or 480Y/277 V) with Dyn1 or Ynyn0 connections. Natural ONAN cooling sustains 2.5 MVA continuous load, while high-efficiency core and winding design meet DOE 2016 efficiency mandates (≥ 99.4 %). Built on a welded-steel padmount frame, it resists moisture, dust, and vandalism—ideal for BESS, EV charging, crypto-mining, wind/solar farms, and light-industrial sites.

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Product Accessories

HV & LV Bushing Assemblies: Sealed, porcelain-insulated bushings with NEMA pad mounts.

Five-Position Tap Changer: Off-circuit ±2×2.5 % voltage adjustment.

Pressure-Vacuum Gauge: Monitors internal tank pressure and vacuum status.

Oil Level Gauge: Magnetic sight-glass with alarm contacts for low-oil detection.

Breather & Conservator: Silica-gel desiccant maintains dry oil and compensator.

Bay-O-Net & ELSP Fuses: External fuse holders inside hinged access doors.

Grounding Bars & Straps: Stainless-steel hardware for secure earthing.

Drip Tray & Drain Valve: Simplifies oil sampling and maintenance.

Nameplate & Wiring Diagram: Durable data plate with full connection schematics.

Optional Forced-Air Fans: Bolt-on ONAF fans for up to 2 700 kVA peak capacity.

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Product Specifications

Rated Power

2 500 kVA (ONAN), 2 700 kVA (ONAF)

Primary Voltage

up to 34.5 kV

Secondary Voltage

up to 480Y/277 V

Vector Group

Dyn1 / Ynyn0

Frequency

60 Hz

Cooling Method

ONAN (standard), ONAF (optional)

No-Load Loss

2500 W

Load Loss

15000 W

Impedance

5.75 %

Efficiency

99.40 % (meets DOE 2016)

Product Applications

Economy is more affordable

Product Advantages

High-Efficiency Design

Meets DOE 2016 requirements with ≥ 99.4 % efficiency, reducing energy losses and operating costs.

Flexible Voltage Configuration

Broad primary/secondary ranges and off-circuit tap settings adapt to diverse utility standards without hardware changes.

Robust Outdoor Resilience

Welded steel enclosure, sealed bushings, and sealed conservator deliver IPXX wind, dust, and vandal resistance for long service life.

WellDone Power Transformer Plan Drawing

FAQ

What range of transformer products do you offer and which standards do they meet?

We manufacture a diverse array of transformers including Oil-Immersed Distribution Transformers, Dry Type Transformers, Power Transformers, Three Phase Pad Mounted Transformers, Single Phase Pad Mounted Transformers, Substation Transformers, and Pole Mounted Transformers. Our technical team, with nearly 20 years of industry experience, ensures that our designs comply with international standards such as ANSI, IEEE, DOE, CSA, AS, AZS, GOST, IEC, and more. Additionally, many of our products have obtained UL, cUL, and CSA certifications, affirming their safety and performance in global markets.
How do you ensure the quality and reliability of your transformers?

Our transformers are produced under a rigorous quality management system covering every stage from material selection to final testing. Each product comes with a minimum 24-month warranty, ensuring long-term safety and reliability. This commitment to quality has earned the trust of global customers and leading industry players.
What are your production lead times, customization options, and global market reach?

For standard models, our production lead time is typically 10 to 25 days, and we offer flexible OEM/ODM services for customized projects. We also tailor packaging solutions to meet specific customer requirements. Our transformers are exported worldwide—including North America, Europe, South America, Australia, Asia, and Africa—with successful partnerships involving renowned companies. For more details or personalized support, please contact us via email or WhatsApp.

Three Phase Pad Mounted Transformer 2500KVA Pad Mounted Transformer 2500KVA Three Phase Pad Mounted Transformer

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