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  • Oil-Cooled Distribution Transformer 1250kva Power Transformer 10kV On-Load Tap Switch Electrical Equipment
  • Oil-Cooled Distribution Transformer 1250kva Power Transformer 10kV On-Load Tap Switch Electrical Equipment
  • Oil-Cooled Distribution Transformer 1250kva Power Transformer 10kV On-Load Tap Switch Electrical Equipment
  • Oil-Cooled Distribution Transformer 1250kva Power Transformer 10kV On-Load Tap Switch Electrical Equipment
  • Oil-Cooled Distribution Transformer 1250kva Power Transformer 10kV On-Load Tap Switch Electrical Equipment
  • Oil-Cooled Distribution Transformer 1250kva Power Transformer 10kV On-Load Tap Switch Electrical Equipment
Oil-Cooled Distribution Transformer 1250kva Power Transformer 10kV On-Load Tap Switch Electrical Equipment

Oil-Cooled Distribution Transformer 1250kva Power Transformer 10kV On-Load Tap Switch Electrical Equipment

$6000.00-$7000.00/ Piece|1 Piece/Pieces(Min. Order)
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Oil-Cooled Distribution Transformer 1250kva Power Transformer 10kV On-Load Tap Switch Electrical Equipment

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Power Distribution & Voltage Regulation: Designed to step down high-voltage inputs (e.g., 10kV, 35kV) to usable low-voltage outputs (e.g., 400V, 220V) for commercial/industrial use. Equipped with an on-load tap switch for seamless voltage adjustment without interrupting power supply.
  • Oil-Cooled Cooling System: Utilizes ONAN (Oil Natural Air Natural) cooling with vertical fins and an integrated oil tank to efficiently dissipate heat, ensuring stable operation under high-load conditions.

Key features

  • 1. Advanced Material Technology for Durability

    • With a corrosion-resistant metal body and reinforced cooling fins, ensure long-term reliability in harsh outdoor environments while efficiently dissipating heat to prevent overheating*.

  • 2. Seamless Voltage Regulation via On-Load Tap Switch

    • With integrated on-load tap switching (OLTS) technology, adjust voltage output dynamically without interrupting power supply, ensuring stable operation during fluctuating demand*.

  • 3. High-Capacity Performance for Diverse Applications

    • With a 1250kVA rating and compatibility with input voltages up to 400kV, handle large-scale power distribution needs while maintaining efficiency in commercial or industrial settings*.

  • 4. Optimized Cooling for Continuous Operation

    • With an ONAN (Oil Natural Air Natural) cooling system and dedicated oil tank, sustain uninterrupted performance in high-load scenarios while minimizing energy loss*.

  • 5. Compliance with Industry Safety Standards

    • Designed to meet rigorous electrical safety and environmental compliance standards, ensuring safe, reliable power transmission in critical infrastructure applications*.

Product details

Oil-Cooled Distribution Transformer 1250kva Power Transformer 10kV On-Load Tap Switch Electrical Equipment

The Oil-Cooled Distribution Transformer 1250kVA is a robust power solution designed for reliable energy distribution in industrial and utility applications. With a 10kV on-load tap switch and oil-cooled cooling system (ONAN), it ensures stable voltage regulation under varying loads. Built with durable metal construction and advanced heat-dissipating fins, this transformer is ideal for harsh environments and high-power demand scenarios.

Technical specifications

FeatureSpecificationApplication Scenario
Cooling MethodONAN (Oil Natural Air Cooling)Efficient heat dissipation in standard outdoor installations
Voltage RangeInput: 6kV–400kV; Output: 110V–10kVVersatile for grid connection and industrial load distribution
MaterialSteel/Aluminum alloy with gray finishWithstands extreme temperatures and weather exposure
Tap SwitchingOn-load tap changer (OLTC)Real-time voltage adjustment without interrupting power flow
Phase ConfigurationThree-phaseHigh-efficiency power distribution for commercial/industrial grids
Rated Capacity1250kVASupports medium-to-large scale energy transformation

Customization guide

Adjustable parameters include:

  • Voltage Tapping: Customizable input/output voltage ratios to match grid requirements.
  • Cooling System: Enhanced oil cooling or forced-air options for high-temperature environments.
  • Material Thickness: Reinforced steel frames for seismic or corrosive zones.

Get inspired

With its adaptable voltage range and robust cooling system, this transformer ensures uninterrupted power supply for factories, substations, and urban grids. The on-load tap changer enables seamless voltage regulation, minimizing downtime and maximizing energy efficiency.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Voltage Handling6kV–110kV35kV–220kV69kV–400kV
Cooling EfficiencyStandard ONAN+20% faster cooling+35% enhanced cooling
Durability RatingIP23IP54IP66
Tap Switch Speed3 positions/min5 positions/min8 positions/min

Supplier's note

  1. Technical Breakthroughs:

    • On-Load Tap Changer (OLTC): Enables real-time voltage adjustments without downtime, critical for fluctuating industrial loads.
    • Enhanced Cooling Fins: 20% larger surface area than traditional designs, reducing thermal stress by 15%.
    • Corrosion-Resistant Coating: Meets ISO 12944-C2 standards, extending lifespan in coastal or industrial pollution zones.

  2. Version Selection Guide:

    • Base Model: Ideal for small-to-medium grids (e.g., rural substations) with stable voltage inputs.
    • Advanced Model: Suitable for manufacturing plants requiring frequent voltage adjustments (e.g., metallurgy facilities).
    • Pro Model: Designed for high-voltage transmission networks (e.g., 400kV substations) with extreme environmental demands.

With the Pro model’s IP66 rating, you can ensure operation in heavy rain or dust storms. Pair its 8 positions/min tap speed with 400kV capacity to achieve seamless power delivery to large industrial complexes.

Frequently asked questions

  • Which oil-cooled distribution transformer suits industrial complexes needing 10kV input?

  • How to maintain the cooling system efficiency of a 1250kVA onan-type transformer?

  • Metal vs. composite materials: Which is better for outdoor transformers?

  • Can this 1250kVA transformer handle custom voltage configurations?

  • Is the cooling oil in this transformer FDA-approved for safety?

  • What benefits does the on-load tap changer (OLTC) provide?

  • How does this transformer ensure efficiency in high-temperature climates?

  • Is the 1250kVA transformer suitable for data center power supply?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Cooling EfficiencyIndustrial substations, high-heat areasIndustry Standard: ONAN cooling (passive)
Our Base: ONAN + finned radiator (43°C max temp)
Our Advanced: ONAF (forced air) ▲ (38°C max temp)		▲ Advanced: 12% faster heat dissipation (IEC 60076-8 compliant)
Base: Cost-effective for moderate loads		Industry Standard: Risk of overheating in high-demand scenarios
Advanced: Requires external fan maintenance
Voltage FlexibilityGrid substations, variable load sitesIndustry Standard: Fixed tap ratio (±2.5% adjustment)
Our Base: 5-tap on-load tap changer (OLTC) ▲ (±5% range)
Our Advanced: 9-tap OLTC ▲ (±7.5% range)		▲ Advanced: Adapts to wider voltage fluctuations (IEEE C57.12.90 compliant)
Base: Suitable for stable grids		Industry Standard: Manual adjustment required during outages
Energy EfficiencyCommercial buildings, eco-certified sitesIndustry Standard: 97% efficiency (IEC 60076-7)
Our Base: 98.2% efficiency ▲ (EN 50760 certified)
Our Advanced: 98.8% efficiency ▲ (ENERGY STAR® equivalent)		▲ Advanced: Saves 15% annual energy costs
Base: Meets EU Ecodesign standards		Industry Standard: Higher long-term operational costs
Noise EmissionUrban substations, residential areasIndustry Standard: 55 dBA (ISO 10816)
Our Base: 48 dBA ▲ (quieter than a library)
Our Advanced: 43 dBA ▲ (quieter than a refrigerator hum)		▲ Advanced: Complies with WHO nighttime noise guidelines
Base: Reduces complaints in densely populated areas		Industry Standard: Likely to violate urban noise regulations
Thermal CapacityIndustrial parks, mining facilitiesIndustry Standard: 100% load capacity
Our Base: 110% overload for 2 hours ▲ (IEC 60076-7)
Our Advanced: 125% overload for 1 hour ▲ (AS/NZS 4664)		▲ Advanced: Handles peak industrial demands (e.g., smelting plants)
Base: Sustains short-term surges		Industry Standard: Risk of tripping during peak loads
CustomizationSpecialized projects (e.g., offshore)Industry Standard: Standard IP23 enclosure
Our Base: IP54 ▲ (dust/water resistant)
Our Advanced: IP66 ▲ + salt-fog resistance ▲ (ASTM B117)		▲ Advanced: Deployable in corrosive marine environments
Base: Suitable for harsh outdoor conditions		Industry Standard: Limited to indoor or dry environments

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