Oil Immersed Transformer 6-10kV 1250kVA

Overview
Product Overview
Protection, Customization & Lifecycle Value
Applications
Why Choose Bardeen
Technical Specifications
FAQ
Transportation Services & Process

Overview

Bardeen 1250kVA Oil Immersed Transformer

The 6-10kV 1250kVA oil immersed transformer bridges the gap between a compact distribution unit and a large plant transformer. Its capacity is appropriate for substations that combine several building loads or a mixture of motors, lighting, HVAC equipment, and general services on one secondary bus. Rather than applying a fixed standard package, the transformer can be configured to the load profile, utility interface, secondary distribution scheme, environmental conditions, and maintenance practice of the project

Bardeen presents the oil immersed transformer 1250kVA, a high-performance solution engineered for reliable power distribution and resilient grid support. The oil immersed transformer 1250kVA from bardeen is purpose-built to meet the rigorous demands of modern power networks. As an IEC certified power transformer product line, this oil immersed transformer 1250kVA combines proven materials, precise manufacturing, and advanced design techniques to serve as a cornerstone in distribution systems. The oil immersed transformer 1250kVA addresses both conventional distribution needs and specialized renewable integration, making it an essential 6-10kV distribution transformer choice for utilities, industrial sites, and renewable energy projects

Product Overview

Design and Construction & Key Features

The oil immersed transformer 1250kVA features robust core and winding assemblies optimized for low-loss operation and superior thermal performance. The 6-10kV distribution transformer design utilizes high-grade cold-rolled grain-oriented silicon steel for minimal core loss and optimized flux distribution. Winding arrangements are engineered for low impedance and excellent short-circuit withstand, ensuring the oil immersed transformer 1250kVA maintains stability under fault conditions

Core Highlights:
‑ Provides a balanced capacity option for mixed‑use load centers with room for reasonable operating growth.
‑ Voltage ratio, vector group, tapping arrangement, and impedance can be aligned with the selected distribution architecture.
‑ Oil circulation and the external heat‑dissipation arrangement support changing demand across daily operating cycles

The tank and conservator are manufactured from high-strength steel with corrosion-resistant finishes, providing durable protection for the internal components of the oil immersed transformer 1250kVA. As an IEC certified power transformer variant, this product adheres to stringent quality and safety standards throughout its production, operating effectively alongside any renewable energy grid transformer unit

Optional Configuration:
‑ Bushing positions and accessory layouts can be adapted for close‑coupled switchgear or cable‑connected installations.
‑ Project documentation can be organized around the purchaser's drawing review, inspection, and shipment requirements

Performance and Efficiency: Efficient energy transfer is a hallmark of the oil immersed transformer 1250kVA. The transformer’s optimized core geometry and precision-wound coils reduce no-load and load losses, delivering economical operation across varying load profiles. The oil immersed transformer 1250kVA minimizes stray losses and maximizes energy efficiency, making it ideal for continuous duty in 6-10kV distribution transformer applications

Innovation and Technical Advantages: Optimized magnetic circuits and reduced magnetostriction noise through refined lamination stacking techniques. Cooling enhancements including natural oil circulation and radiative cooling fins improve the thermal profile, enabling higher continuous loading and superior transient handling

Protection, Customization & Lifecycle Value

Protection and Monitoring: Comprehensive accessories such as pressure relief devices, Buchholz relays, conservator gauges, and temperature sensors safeguard against internal faults and abnormal operating conditions. Remote monitoring and diagnostic options support predictive maintenance for utility and renewable‑grid deployments, complying with standardized IEC protection interfaces and testing protocols

Customization and Compliance: Bardeen offers tailored configurations including tap‑changer arrangements, secondary bushing layouts, lightning impulse levels, and seismic reinforcement to adapt to site‑specific conditions. Manufactured under controlled IEC‑compliant processes, ensuring consistent quality and regulatory acceptance for international renewable energy grid transformer installations

Installation and Maintenance: Installation follows industry best‑practice standards. Each unit is supplied with clear instructions and factory acceptance testing records for simplified field deployment by utilities and EPC contractors. Preventive maintenance schedules, spare parts and complete technical documentation are provided to minimize downtime throughout the service life

Sustainability and Lifecycle Value: Reduced losses, durable construction and good serviceability deliver outstanding whole‑life economic value. The design supports energy‑saving initiatives and lower carbon emissions. As a renewable energy grid transformer, it stabilizes grid connection for clean power sources, reflecting bardeen’s sustainable manufacturing philosophy and global IEC compliance

Applications

Commercial Complexes — Shopping centers, hotels, and multi‑storey office developments

Institutional Campuses — Hospitals, schools, and multi‑building institutional campuses

Light Industry — Food production, packaging, and light process industries

Logistics & Cold Storage — Cold‑storage facilities and regional logistics hubs

Municipal Projects — Municipal buildings and mixed public‑service complexes

Renewable Energy — Solar farms, wind parks and energy storage system grid‑interconnection

Utility Distribution — Utility feeders for mixed‑load substations with motors, lighting and HVAC loads

Why Choose Bardeen

Bardeen combines deep manufacturing expertise and IEC‑certified production to deliver the oil immersed transformer 1250kVA with consistent quality and reliable performance. Our experience with transformers, substations, switchgears, and generators enables integrated project support and technical partnership for complex power systems. The oil immersed transformer 1250kVA is a dependable 6‑10kV distribution transformer and renewable energy grid transformer solution backed by professional engineering, customization options, and global service capabilities

Technical Specifications

Product Type	Oil Immersed Transformer
Rated Capacity	1250kVA
Voltage Class	6‑10kV
Rated Frequency	50Hz/60Hz
Number of Phases	Three‑phase - subject to product configuration
Cooling Method	ONAN / Optional ONAF
Installation Method	Outdoor or indoor installation
Applicable Standards	IEC 60076 / GB 1094

FAQ

Frequently Asked Questions

Q1: Are your transformer accessories (tanks, cores, radiators) suitable for non‑standard transformer models? Do you support customisation based on drawingsA1: Absolutely. We are not only a manufacturer but also a provider of customised solutions. Whether you provide hand‑drawn sketches, used part samples, or PDF drawings, our technical team can produce precise CAD production drawings for you. For cores, we can tailor the stacking scheme of grain‑oriented silicon steel sheets according to your loss requirements; for tanks, we can adjust wall thickness and reinforcement structures based on insulation class

Q2: How do you ensure that the cores or clamping frames you produce match the performance of my original transformer designA2: We implement full‑process quality traceability. For cores, we strictly test flux density and specific loss to ensure they meet or even exceed national standards. For clamping frames (clamps), we pay special attention to punching position accuracy and galvanising/anti‑corrosion treatment, and provide CMM (coordinate measuring machine) inspection reports for critical dimensions, ensuring seamless installation upon receipt

Q3: What materials are used for the transformer tanks and radiators? How do you prevent rustingA3: We conventionally use high‑quality cold‑rolled steel plates (Q235B or Q345R). For rust prevention, we perform strict shot‑blasting to remove mill scale, followed by epoxy coal tar paint or polyurethane topcoat, with a dry film thickness strictly controlled above 120μm. For radiators (fin‑type radiators), we place special emphasis on internal pickling and Phosphating treatment to ensure that the transformer oil is not contaminated during circulation

Q4: Are the silicon steel sheets for the cores imported or domestic? Are the clamping frames strong enoughA4: We offer two options – Baowu Steel and Nippon Steel – to suit different budget requirements. For clamping frames (clamps), we use high‑strength steel formed in one stamping process, followed by vibration ageing treatment to relieve internal stress. This ensures that the clamps do not deform during a transformer short circuit, firmly securing the core

Transportation Services & Process

1. Heavy‑Lift & OOG Expertise

Specialized handling for Over‑Out‑of‑Gauge (OOG) cargo. We manage the entire process for heavy transformers, from custom crating and vacuum packaging to flat‑rack, break‑bulk, or Ro‑Ro shipping.

2. Customs & Compliance Management

Expert handling of complex export/import documentation, HS codes, and destination country regulations. We ensure smooth customs clearance to avoid costly delays.

3. Real‑Time Visibility & Risk Control

24/7 GPS tracking and milestone updates. Comprehensive cargo insurance covering all risks from origin warehouse to destination site.

4. Emergency Response

Prioritized air freight and expedited sea options for critical breakdowns. We minimize downtime by getting your replacement transformer or parts there faster.

Process

Assessment & Planning

We analyze the dimensions, weight, and route to design the optimal transport plan.