2000 kVA Oil-Immersed Transformer Specifications, Copper Winding Advantages, and 10kV Substation Applications

Are you sourcing a dependable 2000 kVA oil-immersed transformer for a 10kV substation project? Matching detailed technical specifications with real-world operational demands-especially the winding material selection-is what separates a reliable, low-maintenance installation from one that incurs ongoing cost and downtime.

 

At GNEE, we are not a trading company; we are a specialized power transformer manufacturer with over 18 years of factory production experience, ISO 9001-certified facilities, and a track record of delivering oil-immersed transformers to over 150 countries.

 

This guide shares our engineering insight into the precise specifications, the decisive benefits of copper windings, and the proven 10kV substation applications of this widely specified capacity class.

 

 GNEE Factory – Winding Workshop for Oil-Immersed Transformers

 

 

Parameter	Typical Value	Standard
Rated Capacity	2000 kVA	GB/T 1094
Primary Voltage	10 kV	GB/T 1094
Secondary Voltage	0.4 kV	GB/T 1094
Frequency	50 Hz	IEC 60076
No-load Loss	≤ 2.1 kW	GB/T 1094
Load Loss	≤ 18 kW	GB/T 1094
Winding Material	Copper (T2)	GB/T 5585
Vector Group	Dyn11	GB/T 1094.1
Impedance Voltage	4.5% – 6%	GB/T 1094.5
Cooling Method	ONAN	IEC 60076-2
Tap Changer	Off-load ±2×2.5%	GB/T 1094
Insulation Class	Class A (105°C)	GB/T 11022
Total Weight	Approx. 5,500 – 6,500 kg	Manufacturer Design

 

 

The choice between copper and aluminum windings is one of the most consequential decisions in specifying a 2000 kVA oil-immersed transformer.

 

At GNEE, electrolytic copper is our factory-recommended standard for this power rating, and our engineering team consistently advises copper windings for projects where reliability, efficiency, and lifecycle value are non-negotiable.

 

Lower Energy Losses and Higher Efficiency with Copper Windings

Copper has approximately 60% of the electrical resistivity of aluminum at operating temperature, which translates directly into lower I²R loss per unit length for an identical cross-section. In a 2000 kVA oil-immersed transformer operating continuously at 80% average loading, the load loss saving of copper over an equivalent aluminum design compounds into thousands of kilowatt-hours saved annually. Many of our clients in markets with high electricity tariffs achieve payback on the copper winding premium within 3 to 5 years through reduced operational expenditure alone.

 

Enhanced Overload Capacity and Thermal Stability

Copper windings demonstrate superior thermal conductivity and heat dissipation characteristics under oil. During transient overload events-commonplace in industrial distribution and renewable energy collector networks-copper-wound coils maintain a more uniform temperature profile, reducing hotspot intensity within the winding insulation. This thermal stability directly supports the transformer's overload rating and contributes to reliable performance in cyclical load environments.

 

Superior Mechanical Strength and Short-Circuit Withstand

A 2000 kVA oil-immersed transformer must be engineered to survive the intense electromagnetic forces generated during downstream faults. Copper's higher tensile strength and elasticity modulus compared to aluminum provide inherently stronger resistance to coil deformation under short-circuit current impact. At GNEE, our copper-wound 2000 kVA designs consistently pass short-circuit withstand testing with minimal dimensional change, confirming mechanical robustness that translates into a longer uninterrupted service life.

 

Proven Longevity and Lower Lifecycle Costs

When we examine transformers returning for refurbishment or forensic analysis after decades of service, copper windings demonstrate measurably slower insulation aging and less contact degradation at joints. The combination of lower thermal stress, better mechanical integrity, and excellent corrosion resistance in the oil environment makes a copper-wound 2000 kVA oil-immersed transformer a genuine 30-year asset. For substation operators, this means fewer interventions, lower maintenance budgets, and a higher residual value.

 

The insulating oil system is essential for transformer reliability. The 2000 kVA oil-immersed transformer typically adopts ONAN cooling, where oil circulates naturally between windings and radiators. Heat dissipates through cooling fins without auxiliary fans or pumps, ensuring simple structure and low maintenance.

 

The insulating oil must meet performance requirements such as breakdown voltage above 40 kV, flash point above 135°C, low moisture content, and stable chemical properties. These characteristics guarantee long-term insulation reliability.

 

The transformer is equipped with a conservator tank connected to the main tank, along with a silica gel breather to prevent moisture ingress. A gas relay provides fault detection by monitoring gas accumulation caused by internal insulation failure or overheating.

 

 

Application	Load Characteristics	Configuration Recommendation
Industrial Park Substation	Impact loads and harmonics	Higher impedance and harmonic filter
Municipal Infrastructure	Night peak load	Reactive power compensation
Commercial Complex	High load density	Dual transformer redundancy
Underground Utility Tunnel	Limited ventilation	Enhanced cooling assessment
Data Center Power Supply	Near full load operation	Dyn11 connection for harmonic suppression

 

 

The transformer foundation must support at least 1.5 times the equipment weight. Level deviation should be controlled within strict limits to prevent mechanical stress. Proper fire separation distance must be maintained for outdoor installations. Indoor installations require oil containment and fire protection systems.

 

Grounding is critical. Transformer tank, core, and neutral point must be reliably grounded. Surge arresters should be installed on the high-voltage side to protect against lightning overvoltage.

 

 

Oil-immersed transformers typically have a service life of 30 to 40 years. Monthly inspection should include oil level, temperature, and abnormal noise monitoring. Annual oil testing including dissolved gas analysis helps detect insulation degradation. Periodic preventive testing ensures long-term reliability.

 

Overload operation accelerates insulation aging. When dissolved gas analysis indicates abnormal acetylene levels or oil degradation, immediate inspection is required to avoid internal faults.

 

 

Parameter	Oil-Immersed Transformer	Dry-Type Transformer
Insulation Medium	Mineral Oil	Epoxy Resin
Fire Safety	Requires protection	Fire-resistant
Overload Capacity	High	Limited
Noise Level	Lower	Higher
Initial Cost	Lower	Higher
Maintenance	Oil testing required	Minimal
Installation Environment	Outdoor/Substation	Indoor/Buildings

 

Ready to take the next step?

 

Send us your load profile, voltage requirements, and any special conditions now. Our engineering team will return a detailed technical proposal and quotation for your 2000 kVA oil-immersed transformer within one business day. 

 

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FAQ

 

How much oil is in a 2000 kVA transformer?

The oil capacity of a 2000 kVA oil-filled transformer is generally around 1300 to 1500 liters. This can vary depending on the specific design and manufacturer specifications.

 

How much does a 2000 kVA transformer weight in kg?

Given the capacity in kVA or kilovolt amperes, you can multiply this value by the transformer's BIL or Basic Impulse Insulation Level to get the estimated weight. A 2000 kVA transformer, based on that estimate, can weigh around 4,000 Kilograms to 7,000 Kilograms.

 

What is a 2000 kVA transformer?

Transformer Features: With a transformer rating of 2000 KVA (2 MVA), the industrial transformer features a primary voltage of three-phase 13200V Delta and a secondary voltage of three-phase 480Y/277 Wye.

 

What is a 2000kVA dry type transformer?

The 2000kVA Dry-Type Transformer from NPC Electric is engineered for high efficiency and reliability in demanding industrial and commercial applications. It features advanced solid insulation technology, eliminating the need for oil, which reduces maintenance and environmental concerns.

 

How many amps is a 2000VA transformer?

Table of VA to Amps Conversions

VA	Voltage (V)	Amps (A)
1000	240	5.208
1200	240	6.250
1500	240	7.813
2000	240	10.417

 

What is the impedance of a 2000 kVA transformer?

Transformer 1: 2000 kVA, Impedance (Z₁) = 5.75%