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220 kv 230kv High Voltage Oil immersed Power Transformer
Instrava Curated delivers a higher standard of operational certainty to bulk transmission grids and heavy industrial power infrastructures worldwide. As a specialized global supplier rather than a single-track manufacturer, our foundational value lies in our elite engineering filter. We meticulously evaluate global manufacturing tracks to select only the most resilient, high-capacity electrical assets. Our curated 220kv / 230kv High Voltage Special Oil-Immersed Power Transformers embody this strict selection strategy. Engineered to step up or down massive grid voltages with absolute stability, these systems provide a verified energy bridge for regional networks, large-scale substations, and critical mining or petrochemical operations demanding long-term efficiency and grid defense.
Transformer Description
Advanced Computational Modeling & Material Supremacy
When sourcing high-voltage infrastructure for our portfolio, Instrava prioritizes products built on advanced multi-physics validation and premier metallurgy:
Toshiba-Powered Analytical Verification: The transformers within our collection are designed and verified using Japanese Toshiba analysis software paired with custom validation procedures. Every crucial boundary—including the magnetic core, internal coils, lead wires, machine body, and oil tank—is modeled to eliminate electromagnetic and thermal field anomalies.
Precision-Milled Hi-B Silicon Steel Cores: Constructed using top-grade Hi-B silicon steel sheets, the magnetic cores are precision-cut using CNC-controlled GEORG cutting lines. The laminations are perfectly rounded to optimize magnetic flux paths, accurately calculating the leakage field to drastically minimize load loss and guarantee low-noise operation.
High-Strength Oxygen-Free Windings: Coils are wound from premium oxygen-free copper and utilize advanced self-adhesive transposed conductors. Combined with a rigid, six-sided structural positioning layout, the winding architecture delivers unparalleled mechanical durability and thermal resilience under heavy continuous electrical loading.
Absolute Reliability, Deep Processing & Lifespan Integrity
Every asset selected for the Instrava power lineup undergoes advanced vacuum processing to ensure a completely stabilized, low-maintenance field deployment:
Advanced Vapor Phase Drying & Full Vacuum Impregnation: To guarantee an ultra-low partial discharge profile, the core and coil assemblies undergo cutting-edge kerosene vapor phase drying (VPD). This is immediately followed by a full-vacuum oil-filling process, which extracts microscopic moisture voids and maximizes insulation dielectric strength.
Superior Short-Circuit Fault Resistance: Thanks to the high-strength winding bracing and computational design verification, these units possess superior structural resistance to sudden short-circuit faults, preventing physical coil deformation during intense line surges.
30-Year Maintenance-Free Enclosure: Features a fully enclosed oil tank utilizing a specialized sealing structure that isolates the insulating oil from ambient oxygen and humidity. This airtight barrier stops fluid oxidation and sludge formation, guaranteeing a 30-year maintenance-free operational lifespan in harsh outdoor grid conditions.
Transformer Parameter
| Feature / Technical Parameter | Engineered Specifications |
| Product Classification | High Voltage Special Oil-Immersed Power Transformer |
| Primary Voltage Rating | 220 kV / 230 kV (Fully Customizable to Regional Grids) |
| Secondary Voltage Ratings | 6.3 kV, 10.5 kV, 11 kV, 33 kV, 35 kV, 69 kV (Fully Customizable) |
| Power Capacity Range | 6,300 kVA to 200 MVA |
| Core Processing & Cut Line | Top-Grade Hi-B Silicon Steel via CNC GEORG Cutting Lines |
| Winding Matrix Engineering | Premium Oxygen-Free Copper Coils / Self-Adhesive Transposed Conductors |
| Structural Alignment | Six-Sided Assembly Positioning |
| Drying & Filling Processing | Kerosene Vapor Phase Drying (VPD) / Full Vacuum Oil-Filling |
| Connection Vector Groups | YNd11 / YNyn0 (Other Configurations Available Upon Request) |
| Cooling Medium | High-Dielectric Mineral Insulation Oil |
| Design Life Profile | 30-Year Maintenance-Free Lifespan via Specially Sealed Tank Design |
| International Quality Marks | ISO 9001, ISO 14001, CE, SGS, UL |
| Applicable Standards | IEC Series, ANSI / IEEE, CSA / CAN |
| Main Technical Parameters for oil-immersed power transformer | ||||||||
| Rated Power(kva) | High Voltage(kv) | H.V.Tap range | Low Voltage(kv) | Connection symbol | Short Circuit Impendence | No-load loss(kw) | On-load loss(kw) | No-load current(%) |
| 6300 | 63 66 69 110 132 138 220 | ±8x 1.25% | 6.3 6.6 10.5 11 33 69 | YNd11 YNyn0 others | 10-14 | 9.4 | 34 | 0.63 |
| 8000 | 11.2 | 40.4 | 0.63 | |||||
| 10000 | 13.1 | 47.6 | 0.75 | |||||
| 12500 | 15.4 | 56.5 | 0.53 | |||||
| 16000 | 18.5 | 69.5 | 0.49 | |||||
| 20000 | 21.8 | 84.2 | 0.49 | |||||
| 25000 | 25.6 | 99.5 | 0.4 | |||||
| 31500 | 30.4 | 120 | 0.4 | |||||
| 40000 | 36.2 | 140.3 | 0.39 | |||||
| 50000 | 42.6 | 174.3 | 0.39 | |||||
| 63000 | 52 | 210 | 0.39 | |||||
| 75000 | 60 | 238 | 0.49 | |||||
| 90000 | 69 | 274 | 0.49 | |||||
| 120000 | 85 | 328 | 0.46 | |||||
| 150000 | 101 | 385 | 0.42 | |||||
| 160000 | 105 | 404 | 0.42 | |||||
| 180000 | 115 | 436 | 0.42 | |||||
| 240000 | 144 | 539 | 0.4 | |||||
Instrava OEM/ODM
Reliable Instruments & Power Infrastructure. Solutions That Fit Your Application.
Instrava is focused on delivering reliable industrial solutions through carefully curated products, application-driven optimization, and flexible customization. We select proven measurement instruments and heavy-duty power transformers from trusted China manufacturers to ensure consistent quality. By thoroughly evaluating engineering topologies against real working conditions, we solve practical grid and process challenges, providing tailored configurations to meet specific application needs.
By combining selection expertise with deep application understanding, Instrava helps customers reduce operational risk, improve energy efficiency, and achieve dependable results across complex industrial and power distribution environments.
What validation testing ensures the safety of Instrava’s curated 220kV/230kV power transformers during sudden grid short circuits?
Every 220kV/230kV oil-immersed power transformer in our curated collection features superior short-circuit resistance verified by Japanese Toshiba analysis software and proprietary structural simulation procedures. By evaluating mechanical forces across the core, coils, and lead wires during the modeling phase, the transformer is structurally reinforced with premium oxygen-free copper coils, self-adhesive transposed conductors, and a heavy-duty six-sided positioning matrix to withstand intense, sudden short-circuit stresses without winding deformation.
How does kerosene vapor phase drying (VPD) improve the insulation life of a high-voltage transformer?
Kerosene vapor phase drying improves insulation life by extracting deep-seated moisture from the cellulose pressboards under a pure vacuum environment. This advanced thermal process distributes heat uniformly throughout the core and coil assembly, causing moisture to rapidly evaporate without damaging the insulation chemistry. Combined with subsequent full vacuum oil-filling, this extraction ensures an ultra-low partial discharge rate, which prevents internal electrical tracking and significantly extends the transformer’s operating lifespan.
Why is accurate leakage field calculation critical for high-capacity transformers ranging up to 200 MVA?
Accurate leakage field calculation is critical because it directly reduces stray losses and eliminates localized overheating within the steel tank and structural clamps. At high capacities up to 200 MVA, unmanaged magnetic leakage lines generate heavy eddy currents that cause thermal runaway and lower total grid efficiency. Utilizing advanced calculation models allows engineers to optimize winding dimensions and magnetic shielding, lowering load losses and delivering ultra-low noise operation.
What are the long-term economic benefits of a 30-year maintenance-free transformer tank sealing structure?
The primary economic benefit is the near-total elimination of recurring operational expenditure (OPEX) associated with oil filtration, dehydrating breather replacements, and scheduled downtime. Instrava’s curated 220kV/230kV units utilize a fully enclosed oil tank equipped with a specialized sealing structure. This absolute seal prevents atmospheric moisture and oxygen from contacting the mineral oil, halting the chemical aging of both the fluid and paper insulation to guarantee a 30-year operational life without routine fluid reconditioning.
How does a core made with Hi-B silicon steel and cut on GEORG lines enhance substation performance?
A core engineered with top-grade Hi-B silicon steel and cut on CNC-controlled GEORG cutting lines maximizes transformer efficiency while minimizing magnetic hum. Hi-B silicon steel laminations possess exceptional magnetic permeability, which drastically lowers core and hysteresis losses. Precision CNC-milled cutting and rounding eliminate microscopic burrs and gaps at the joints, ensuring optimal magnetic flux distribution and significantly lower audible noise levels inside municipal or industrial substations.
Which connection groups and international standards are compatible with this 220kV/230kV high-voltage line?
This high-voltage transformer line is fully compatible with standard global utility architectures, supporting YNd11 and YNyn0 connection vector groups, alongside completely customizable primary and secondary configurations. To ensure seamless transnational grid integration, the series conforms to all major international grid codes and engineering criteria, including IEC, ANSI/IEEE, and CSA/CAN standards, backed by ISO 9001, ISO 14001, CE, SGS, and UL certifications.
Why Choose Instrava
Built on Consistency, Not Claims
Focused on Industrial Applications
We specialize in industrial analysis and detection, with a clear understanding of real-world operating environments and requirements.
Strict Product Selection Criteria
Every instrument is evaluated based on performance, stability, and application suitability—not just specifications or pricing.
Reliable Supply & Quality Consistency
We work with trusted manufacturers to ensure stable supply, consistent quality, and dependable delivery.
Practical, Experience-Based Support
Our recommendations are grounded in application understanding, helping customers avoid common issues and achieve reliable results.
Instrava is built to reduce uncertainty—so every decision you make is clearer, safer, and more reliable.
