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1000KVA 11KV/0.4KV Oil Type Distribution Transformer
Instrava Curated brings a proven standard of efficiency to localized utility upgrades and rural grid modernizations. As a strategic global supplier rather than a single-track manufacturer, we eliminate procurement vulnerabilities by vetting the highest-performing electrical infrastructure. Our curated 1000KVA 11KV/0.4KV Oil Type Distribution Transformer stands as a primary example of this rigorous selection process. Globally certified and engineered to bridge the gap between medium-voltage regional grids and low-voltage terminal applications, this series provides the rugged reliability required for remote environments, decentralized networks, and heavy-duty industrial facility upgrades.
Transformer Description
Certified Performance & Material Flexibility
Sourcing distribution infrastructure through Instrava guarantees adherence to absolute efficiency benchmarks, verified by global regulatory compliance:
Universal Compliance & Elite Certification: This transformer series holds top-tier international credentials, carrying UL, cUL, CSA, SGS, and CE marks. It is built fully compliant with ANSI/IEEE, CSA/CAN, and DOE efficiency standards, making it seamlessly compatible with North American, European, and global utility networks.
Tailored Winding Composition: Available in both high-purity copper and economic aluminum winding configurations. This gives project managers the flexibility to optimize initial capital expenditure (CAPEX) or prioritize maximum, long-term conductivity based on specific project lifespans.
Advanced Low-Loss Engineering: Engineered to drastically reduce operating expenses (OPEX). With an exceptionally low no-load loss of just 0.34 kW and an ultra-low no-load current of 1%, these units optimize base grid efficiency. Combined with a load loss profile of 2.73 / 2.6 kW, they maintain minimal thermal dissipation under full continuous loads.
Seamless Integration & Robust Terminal Design
The physical and electrical design of this 1000KVA distribution line balances high-power capacity with an agile, grid-ready profile:
Compact Footprint for Remote Deployment: Measuring just 1240 x 780 x 1360 mm with a total weight of 910 kg, these three-phase, two-winding transformers are remarkably compact. This optimized weight-to-capacity ratio makes them highly agile for transport to remote rural areas and simplifies pole or pad installations.
Flexible Phase Connections: Built to match localized distribution topologies, supporting both Dyn11 and Yyn0 connection vector groups. This flexibility allows engineers to precisely manage neutral currents, balance single-phase residential loads, and minimize harmonic disturbances at the terminal end.
Passive Thermal & Voltage Regulation: Utilizes purely passive ONAN (Oil Natural Air Natural) cooling, capitalizing on high-grade dielectric mineral oil for self-sustained convection cooling without the risk of fan mechanical failure. Fluctuating incoming grid lines are stabilized by an integrated off-circuit tap changer offering a ±2 × 2.5% tapping range.
Transformer Parameter
| Feature / Technical Parameter | Engineered Specifications |
| Product Classification | Three-Phase, Two-Winding Distribution Transformer |
| Rated Power Capacity | 1000 KVA |
| Voltage Ratio (Primary / Secondary) | 11 KV (10/11 KV Primary) / 0.4 KV Secondary |
| Rated Frequency | 50 Hz / 60 Hz Dual Compatibility |
| Cooling Method / Insulation Type | ONAN (Oil Natural Air Natural) / Premium Mineral Oil |
| Vector Groups / Connections | Dyn11 / Yyn0 / Custom Adaptations |
| Tapping Range (Voltage Regulation) | ±2 × 2.5% via De-energized Tap Changer |
| Impedance Voltage ($%Z$) | 4% (0.04) |
| No-Load Loss / Load Loss | 0.34 kW / 2.73 / 2.6 kW |
| No-Load Current | 1% (0.01) |
| Winding Core Materials | High-Conductivity Copper / Premium Aluminum |
| Physical Dimensions (L x W x H) | 1240 x 780 x 1360 mm |
| Total Assembly Weight | 910 kg |
| Compliance & Regulatory Marks | UL, cUL, CSA, SGS, CE / ANSI, IEEE, DOE, CSA/CAN |
| 10kv-35kv Distribution Transformer | ||||||
| Rated Power(kva) | High Voltage(kv) | Low Voltage(kv) | Connection symbol | No-load loss(w) | On-load loss(w) | No load current(%) |
| 400kva | 10kv 11kv 20kv 35kv | 0.4 | Ydn11 Yyn0 | 570 | 4300 | 0.45 |
| 500kva | 680 | 5410 | 0.45 | |||
| 630kva | 810 | 30800 | 0.4 | |||
| 800kva | 980 | 7500 | 0.4 | |||
| 1000kva | 1150 | 10300 | 0.35 | |||
| 1250kva | 1360 | 12000 | 0.3 | |||
| 1600kva | 1640 | 145000 | 0.6 | |||
| 2000kva | 1950 | 19140 | 0.6 | |||
| 2500kva | 2340 | 22220 | 0.5 | |||
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.
Related Product Recommendations
Why is a 1000KVA 11KV/0.4KV oil type transformer the ideal choice for remote rural power grid upgrades?
It is ideal because it combines a compact, high-capacity layout with passive, zero-maintenance cooling. Remote grids frequently experience environmental extremes and lack immediate maintenance access. This 1000KVA unit uses ONAN cooling, relying on natural oil convection instead of mechanical fans that can fail. Its compact dimensions (1240x780x1360mm) and optimized 910kg weight also allow for straightforward transportation and installation on standard rural concrete pads or reinforced platforms.
What global network standards and safety certifications does this 1000KVA transformer meet?
This transformer is globally certified for North American, European, and international markets, holding UL, cUL, CSA, CE, and SGS certifications. Architecturally, it conforms strictly to ANSI/IEEE, CSA/CAN, and DOE standards. These compliance credentials guarantee that the unit satisfies stringent environmental efficiency benchmarks, short-circuit structural safety thresholds, and grid-interconnection regulations required by major utility companies worldwide.
How do the no-load and load loss metrics of this 11KV/0.4KV transformer improve utility ROI?
It improves long-term return on investment by keeping waste dissipation exceptionally low. The transformer features a low no-load loss of 0.34 kW and a load loss of 2.73 / 2.6 kW, anchored by an ultra-low no-load current of 1%. By minimizing core and eddy current losses 24/7, the unit reduces the amount of unbilled energy lost as waste heat. This yields significant cumulative energy savings over a standard 30-year operational lifecycle.
When should a utility engineer specify the Dyn11 vector group over the Yyn0 connection for a 1000KVA distribution line?
The Dyn11 vector group should be specified when the transformer serves unbalanced or non-linear commercial and residential loads. The delta ($\Delta$) primary winding in a Dyn11 configuration traps circulating third harmonic currents and stabilizes the neutral point against heavy load unbalances. Conversely, the Yyn0 configuration is typically selected for balanced, symmetrical three-phase motor grids or to match legacy upstream substation wiring configurations.
What is the benefit of choosing between copper and aluminum coil materials for a 11KV distribution transformer?
Choosing between copper and aluminum allows procurement managers to balance upfront project budgets against long-term operating footprint requirements. Copper windings offer superior electrical conductivity, higher thermal overload resilience, and a more compact internal design, making them optimal for heavy industrial loads. Aluminum windings offer a lighter total structural weight and a significantly lower upfront capital cost, which is ideal for widespread rural electrification grids with tight budget constraints.
How does the integrated ±2 × 2.5% tapping range protect terminal equipment from voltage drops?
It protects equipment by allowing precise adjustment of the transformer’s turn ratio to counter voltage drops caused by long distribution lines. If a remote rural facility experiences a line voltage drop down to 10.45KV instead of a true 11KV input, operators can adjust the manual off-circuit tap changer. This compensation ensures the secondary terminal output remains consistently regulated at a clean, safe 0.4KV (400V/230V) baseline.
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.
