Oil Immersed Transformer 35kV 1000kVA

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

Overview

Bardeen 35kV 1000kVA Oil Immersed Transformer

Bardeen presents the oil immersed transformer 35kV 1000kVA, a high-performance power distribution solution engineered for reliability, efficiency, and seamless integration into modern power networks. Designed and manufactured by Bardeen Equipment Co., Ltd., this 35kV oil transformer 1000kVA distribution transformer is optimized for demanding applications including renewable energy grid transformer installations, industrial and commercial distribution networks, and utility-scale substations

Product Overview

Product Overview & Key Features

The oil immersed transformer 35kV 1000kVA is a medium-voltage, liquid-filled transformer tailored for stepping down 35kV to distribution voltages with exemplary thermal management and dielectric properties

Core Highlights:
‑ Accepts a 35kV‑class supply for projects positioned far from an existing lower‑voltage distribution bus.
‑ The 1000kVA capacity helps avoid over-sizing when the connected load is specialized or geographically isolated.
‑ Primary‑side insulation and clearances are selected for the specified system voltage and environmental duty

The 35kV oil transformer design leverages proven oil-immersed technology and advanced materials to ensure superior insulation, cooling, and overload capacity. As a renewable energy grid transformer, it offers stable performance when interfacing with intermittent generation sources such as wind and solar farms

Optional Configuration:
‑ Terminal hardware, surge‑protection interfaces, and monitoring devices can be matched to the substation arrangement.
‑ Indoor and outdoor configurations allow the equipment layout to follow local climate, access, and security constraints

Key features and specifications:
‑ Rated voltage class: 35kV primary, configurable low‑voltage taps for standard distribution levels. This 35kV oil transformer configuration ensures compatibility with medium‑voltage feeders and substation interconnections
‑ Rated power: 1000kVA, making this 1000kVA distribution transformer suitable for primary distribution and bulk load transfers
‑ Cooling: ONAN (oil natural air natural) cooling standard, with options for ONAF (oil natural air forced) for higher ambient or continuous overload applications
‑ Insulation medium: high‑grade mineral oil with optimized dielectric strength to provide long‑term insulation stability for the 35kV oil transformer application
‑ Core and winding: low‑loss grain‑oriented silicon steel core and high‑conductivity copper (or optionally aluminum) windings, engineered to minimize no‑load losses and load losses for a high‑efficiency power transformer profile
‑ Tap changer: off‑circuit or on‑load tap‑changer options to maintain voltage regulation under varying system conditions, an essential feature for renewable energy grid transformer deployments where generation variability is present
‑ Protection and accessories: conservator tank, Buchholz relay, pressure relief device, temperature gauges, oil level indicator, radiators, and surge arresters as required for safe operation
‑ Standards and testing: designed and manufactured to IEC standards with factory routine and type tests, ensuring each renewable energy grid transformer meets global grid codes and utility specifications

Technical Advantages, Customization & Lifecycle

Technical advantages and innovation: Bardeen’s oil immersed transformer 35kV 1000kVA incorporates several technical innovations that set it apart as a high-efficiency power transformer. The design emphasizes loss reduction through an optimized core geometry using grain-oriented silicon steel, lowering no-load losses and improving overall transformer efficiency

Advanced thermal management is a hallmark of this 1000kVA distribution transformer. The oil-immersed cooling system is engineered for uniform heat dissipation, with radiator layouts and oil circulation paths optimized to maintain consistent operating temperatures. This high-efficiency power transformer approach reduces oil aging and extends maintenance intervals while enabling the transformer to tolerate short-term overloads common in renewable energy grid transformer duty cycles

Customization and support: Bardeen Equipment Co., Ltd. understands that each project has unique demands. The oil immersed transformer 35kV 1000kVA can be customized in terms of tap-changer type, cooling class, winding material, protection schemes, and terminal arrangements. Whether the requirement calls for a 1000kVA distribution transformer configured for rural substation deployment or a renewable energy grid transformer optimized for rapid generation ramping, bardeen offers tailored solutions, backed by engineering support and after-sales service

Manufacturing excellence and quality assurance: Bardeen’s manufacturing processes are rooted in rigorous quality control and IEC‑compliant production lines. The 35kV oil transformer 1000kVA distribution transformer undergoes comprehensive factory testing, including insulation resistance, ratio tests, load and no‑load loss measurements, and routine dielectric testing. Type tests validate against short‑circuit withstand, impulse, and thermal stability criteria. Bardeen Equipment’s commitment to international standards and traceability ensures each unit meets client specifications and regulatory requirements

Installation, maintenance, and lifecycle considerations: The oil immersed transformer 35kV 1000kVA is designed for straightforward installation in standard substation layouts. Detailed documentation, lifting and handling provisions, and pre‑commissioning checks streamline on‑site deployment. Routine maintenance is simplified through accessible monitoring points, oil sampling valves, and modular accessory arrangements

Environmental and safety compliance: Bardeen prioritizes environmental responsibility and safety in the design of the 35kV oil transformer 1000kVA distribution transformer. The transformer meets applicable environmental standards for oil containment and leakage prevention. Materials and manufacturing processes aim to minimize ecological impact, and the transformer is supplied with protective devices to ensure safe operation under abnormal conditions

Applications

Rural Substations — Rural feeder substations serving dispersed communities

Mining & Field Works — Remote mine services, field workshops, and exploration camps

Wind Farm Auxiliary — Wind‑farm operations buildings and auxiliary power systems

Oil & Pipeline Sites — Oilfield, pipeline, and communications support stations

Water Conservancy — Isolated water‑transfer and flood‑control installations

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

Industrial & Municipal — Municipal distribution networks, industrial facilities and islanded microgrids

Why Choose Bardeen

Bardeen’s oil immersed transformer 35kV 1000kVA combines proven oil‑immersed technology with advanced design features to deliver a reliable, high‑efficiency power transformer ideal for distribution and renewable energy grid transformer applications. As a 1000kVA distribution transformer and 35kV oil transformer, it offers adaptability, robust protection, and optimized thermal performance. Backed by Bardeen Equipment Co., Ltd.’s manufacturing expertise and IEC‑compliant practices, this transformer is a dependable choice for utilities, renewable projects, industrial complexes, and commercial developments seeking resilient and efficient power transformation solutions

Technical Specifications

Product Type	Oil Immersed Transformer
Rated Capacity	1000kVA
Voltage Class	35kV
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

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.