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Tier2 500kVA Oil Filled Distribution Transformer

A compact, field-proven 500 kVA oil-filled distribution transformer engineered for low-loss grid distribution and commercial/industrial feeder duty. Optimized to meet Ecodesign (Tier-2) energy-efficiency thresholds, the unit balances minimal no-load losses with robust short-circuit strength and user-friendly maintenance features. Designed for ONAN service with optional natural-ester (FR3) insulation fluid for improved fire safety and environmental performance. Ideal where regulatory compliance, long life, and predictable operating cost are priorities.

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Product Accessories

Digital Supervisory Interface: Monitors transformer performance in real time.

Automated Load Tap Adjustment Module: Enables seamless voltage control under varying loads.

Oil Filtration & Condition Assessment Kit: Optimizes oil purity and insulation integrity.

High-Voltage Terminal Block Assembly: Provides secure, customized connectivity.

Dual Thermal & Pressure Sensor Suite: Continuously tracks operational conditions.

Vibration Absorption Isolation Kit: Minimizes mechanical stress for enhanced durability.

Surge Voltage Suppression Unit: Protects against transient overvoltage events.

Advanced Data Logging System: Records operational metrics for performance analysis.

Robust Grounding & Bonding Assembly: Ensures safe, reliable installation.

Comprehensive Installation & Maintenance Guide: Offers detailed support for setup and upkeep.

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Product Specifications

Rated power

500 kVA (three-phase, 60 Hz / 50 Hz builds available on request).

Voltage class (typical)

27.6–34.5 kV HV options with 600/347 V or 480Y/277 V LV configurations (custom ratios available).

Cooling

ONAN (Oil Natural Air Natural); optional KNAN/ONAF fan stage or natural-ester cooled version.

No-load (core) loss P₀

~459 W (Tier-2 optimized target for 500 kVA class).

Load loss Pₖ @ 75°C

~3,900 W (measured at rated current).

Impedance

~4.00–5.75% (factory set per customer specification).

Vector group

Dyn11 (standard for distribution interconnection; alternatives on request).

Core & winding materials

CRGO silicon steel core; aluminium windings (copper on request).

Insulation & BIL

Oil-filled with HV BIL up to 150 kV and LV BIL up to 30 kV (rating depends on selected HV class).

Standards & compliance

Designed and tested to IEC/BS EN/IEEE practices and sized to satisfy Ecodesign Tier-2 loss limits (EU Reg. 548/2014) where applicable.

Product Applications

Economy is more affordable

Supports reliable power distribution for railways, metro systems, and airport transit hubs.

Critical Transportation Networks
Supplies consistent, high-quality power for manufacturing and processing plants.

Heavy Industrial Facilities
Seamlessly integrates wind and solar installations into existing grids.

Distributed Renewable Energy Systems
Enhances city grid stability with precise voltage regulation.

Urban High-Voltage Substation Upgrades

Product Advantages

Regulation-aligned low losses

Engineered to meet or beat Ecodesign Tier-2 loss envelopes, delivering lower lifetime energy losses and faster payback for high-utilization installations.

Flexible cooling & fluid options

Standard ONAN design with straightforward fan-assist upgrade and optional natural-ester (FR3) fluid for improved fire safety, biodegradability, and extended winding life in demanding sites.

Compact, maintainable, field-friendly design

Common HV/LV interface patterns, accessible sampling/drain points, IR windows and a NEMA-grade marshalling box simplify commissioning, thermal scans and long-term maintenance — reducing downtime and lifecycle OPEX.

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.

500kVA Oil Filled Distribution Transformer Tier2 Oil Filled Distribution Transformer Tier2 500kVA Oil Filled Distribution Transformer

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