Core Components and Manufacturing Process of 2000 kVA Oil Immersed Distribution Transformers
When sourcing a reliable power unit, understanding the core components and manufacturing process of 2000 kVA oil immersed distribution transformers is vital to securing long-term grid stability.
As an ISO-certified transformer manufacturer, GNEE operates a fully integrated production line where we laser-cut, wind, assemble, and test every unit in-house. This vertical control over the entire manufacturing process ensures that each 2000 kVA oil immersed distribution transformer meets the precise electrical and mechanical demands of modern distribution networks.
Whether you are upgrading a substation or launching a new industrial park, knowing what goes inside the tank and how it is built directly influences your operational lifetime. Let us walk you through the internal architecture and production stages that define a GNEE 2000 kVA oil immersed unit.
Send your specifications to GNEE for a fast-turnaround design review
The Core Components of a 2000 kVA Oil Immersed Distribution Transformer
Every 2000 kVA oil immersed distribution transformer is a sophisticated combination of active and passive parts, each engineered to handle rated power at 2,000 kVA continuously. The components must work in thermal and dielectric harmony to prevent early failure. GNEE sources only virgin electrical steel and electrolytic copper, ensuring that from the core to the tap changer, the performance meets IEC 60076 standards.
Magnetic Core: The Energy Transfer Heart of a 2000 kVA Oil Immersed Distribution Transformer
The magnetic core is the single most valuable active component. For a 2000 kVA oil immersed distribution transformer, GNEE uses cold-rolled grain-oriented (CRGO) silicon steel strips, laser-cut with a step-lap design. This reduces the no-load loss to below 2.3 kW and minimizes magnetizing current. Our cores are built with a three-limb, five-limb, or wound-core configuration depending on the voltage vector group, with every lamination insulated by an inorganic coating. By using precisely controlled stacking under pneumatic pressure, we ensure the core remains tight and quiet, with sound levels typically below 62 dB(A) for a 2000 kVA unit.
High-Performance Windings for 2000 kVA Oil Immersed Distribution Transformers
The winding set determines current-carrying capacity and short-circuit withstand strength. Our LV windings for a 2000 kVA oil immersed distribution transformer are wound with electrolytic copper foil or multiple parallel rectangular conductors, depending on the secondary current (around 2,887 A at 400V). The HV winding employs enameled copper wire wound in layers with pre-pressed ducts to allow forced oil circulation. The coil assembly is heavily braced with epoxy-glass spacers and steel clamping rings to survive dynamic forces during a through-fault. We design the ampere-turn balance meticulously so the axial and radial forces stay within safe limits, a critical quality parameter often overlooked in cheaper imports.
| Component / Specification | GNEE Standard for 2000 kVA Oil Immersed Transformer | Benefit to the User |
|---|---|---|
| Core Material | CRGO M3 / M4 grade, step-lap joint | Ultralow no-load loss, quiet operation |
| Winding Material | Electrolytic copper, purity > 99.9% | Low load loss, high thermal conductivity |
| Insulation Class | Class A (105°C), hot spot allowance 98°C | Long insulation lifespan under rated load |
| Cooling Medium | Mineral oil (IEC 60296), PCB-free | Excellent heat transfer and dielectric strength |
| Tank Type | Hermetically sealed with elastic corrugated fins | No contact with ambient air, no oil deterioration |
| Tap Changer | Off-circuit, 5-position ±2×2.5% | Simple voltage adjustment to match distribution |
| Bushings | Porcelain, creepage distance ≥ 25 mm/kV | Reliable insulation under polluted conditions |
| Protection | Oil level gauge, thermometer pocket, Buchholz relay connection, PRV | Safe operation and fault detection |
Insulation System and Mineral Oil in a 2000 kVA Oil Immersed Distribution Transformer
High-grade cellulose paper and pressboard create a layered dielectric barrier between HV and LV windings and between the coils and the core. For a 2000 kVA oil immersed distribution transformer, the oil serves a dual purpose: it cools by natural convection (ONAN) and provides additional insulation. GNEE uses uninhibited or inhibited mineral oil filtered to a breakdown voltage exceeding 70 kV. The entire core and coil assembly is vacuum-dried before oil impregnation, ensuring the transformer can withstand BIL levels up to 170 kV for a 24 kV class primary. This combination of pure oil and properly dried insulation guarantees a partial discharge level below 10 pC, upholding our EEAT commitment.
The Manufacturing Process of 2000 kVA Oil Immersed Distribution Transformers at GNEE
Moving from individual components to a finished unit, the manufacturing process of 2000 kVA oil immersed distribution transformers follows a strict sequence of 15 production stations. Each step builds on the previous, and any deviation affects the final test results. As a manufacturer with genuine in-house capabilities, GNEE invests in CNC-controlled machines so that repeatability and dimensional accuracy are absolute.
Automatic core cutting line in GNEE factory
Core Lamination Cutting and Stacking Process
The production begins with slitting and cutting the CRGO sheets to length. Our automated line maintains a burr height under 0.02 mm, which prevents interlaminar eddy current losses. Operators then stack the laminations on a fixture to form the three-limb core, interleaving the step-lap joints to structurally improve no-load performance. After stacking, the core is clamped and dimensionally checked. This precision stacking is the foundation of a low-loss 2000 kVA oil immersed distribution transformer.
Winding and Active Part Assembly
Simultaneously, the LV and HV coils are wound on computer-controlled winding machines. For the LV, foil winding speeds up the process and offers superior short-circuit strength. Once wound, each coil passes an impulse test before assembly. The core limbs are insulated with pressboard cylinders, and the windings are slid over them. We then connect the horizontal and vertical oil ducts, ensuring that the natural oil flow path is unobstructed. This active part - the physical heart of the 2000 kVA oil immersed distribution transformer - is now ready for drying, a stage where many manufacturers rush.
Vacuum Drying and Oil Impregnation Process
Moisture inside the cellulose insulation is the biggest enemy of a transformer's lifetime. GNEE places the completed active part into a vapor-phase drying oven for 48–72 hours, reducing the moisture content to below 0.5%. While still hot and under vacuum, the assembly is transferred into the oil treatment chamber where degassed, dehydrated mineral oil is introduced. The deep impregnation ensures that every turn of the winding is soaked, guaranteeing a dielectric integrity that meets the manufacturing process standard for a 2000 kVA unit at full impulse level.
Final Tanking and Sealing of the 2000 kVA Oil Immersed Distribution Transformer
After impregnation, the active part is lowered into a hermetically sealed tank with corrugated wall panels. These flexible panels expand and contract with oil volume changes, completely isolating the oil from atmosphere - no separate conservator or breather is needed. All gaskets, typically nitrile or viton, are torqued to specification. We then fit the thermometer pocket, Buchholz relay connection, oil drain valve, and earthing terminals. The result is a sealed-for-life 2000 kVA oil immersed distribution transformer that requires minimal field maintenance.
2000 kVA oil immersed distribution transformer packed on a pallet
Conclusion: Invest in the Proven Core Components and Manufacturing Process of a 2000 kVA Oil Immersed Distribution Transformer
Choosing a transformer based on price alone ignores the decades of continuous service expected from these machines. The core components and manufacturing process of 2000 kVA oil immersed distribution transformers define how silently, efficiently, and safely your power network operates.
From CRGO steel selection and copper foil winding to multi-day vacuum impregnation and final heat-run tests, GNEE's transparent manufacturing approach delivers transformers that regularly exceed their design life. We have exported 2000 kVA oil immersed units across four continents, always backed by detailed test reports and a proactive technical support team.
Take the next step today: send us your primary and secondary voltage, impedance preference, and any site altitude information. Our engineers will swiftly produce a tailored proposal, including a dimensioned GA drawing and full nameplate data, absolutely free.
Click below to submit your inquiry and secure a priority consultation slot - let GNEE's core manufacturing expertise safeguard your distribution network.
What are the components of oil immersed transformer?
The iron core and winding constitute the important parts of the three-phase oil-immersed transformer. In addition, there are oil tanks, oil conservators, bushings, breathing apparatus, radiators, tap changers, gas relays, thermometers, oil purifiers, etc.
What are the basic components of a distribution transformer?
Distribution transformers consist of a magnetic core made from laminations of sheet silicon steel (transformer steel) stacked and either glued together with resin or banded together with steel straps, with the primary and secondary wire windings wrapped around them
What is the specification of 2000 KVA transformer?
The document provides specifications for a 2000 KVA transformer. It has an ONAN cooling type, operates at 11,000V high voltage and 433V low voltage, with a frequency of 50Hz. The total weight is 5935kg with a core and winding weight of 2575kg and oil volume of 1488L.
What is the manufacturing process of transformers?
The manufacturing process involves preparing the raw materials, winding the coils, assembling the core and coils, connecting accessories, drying, oil filtration and filling. Regular maintenance is needed to monitor the transformer hourly, daily, weekly, monthly, yearly and every 2-5 years to ensure proper functioning.
What are the main components of a distribution system?
A typical distribution system can consist of:
- Substations.
- Distribution Feeder Circuits.
- Switches.
- Protective Equipment.
- Primary Circuits.
- Distribution Transformers.
- Secondaries, and.
- Services.