Product Overview
The 35 KV Oil-Immersed Distribution Transformer is a type of distribution equipment widely used in power systems. Manufactured using high-quality materials and advanced processes, it features low loss, low noise, high reliability, and a long service life. This product complies with national energy efficiency standards and is suitable for a variety of indoor and outdoor environments, ensuring efficient energy conversion and stable power supply.
Product Structure
The 35 KV Oil-Immersed Distribution Transformer's structure primarily consists of the following components:
Oil Tank: The oil tank is the outer shell of the transformer and is filled with transformer oil. Transformer oil not only insulates but also provides excellent heat dissipation, effectively dissipating heat generated within the transformer and preventing overheating and equipment damage. The oil tank typically utilizes a corrugated plate design to accommodate changes in oil volume and isolate it from the external environment.
Core: The core is made of high-quality cold-rolled, grain-oriented silicon steel sheets. Sourced from Baowu Group or imported high-permeability cold-rolled electrical steel strip, it is precision-machined using advanced automated shearing lines to ensure precise dimensions and minimal burrs. The core structure features a seven-step, 45°, fully beveled joint. It utilizes positioned laminations and a non-stacked yoke process, effectively reducing no-load losses and current. The core surface is bonded with a high-temperature-resistant resin to enhance overall structural strength, and is also treated to resist moisture and corrosion, resulting in excellent low-loss and low-noise performance.
Windings: Made of conductive material (usually copper or aluminum), windings carry current and generate electromagnetic induction. They consist of a primary winding (high-voltage side) and a secondary winding (low-voltage side), typically wound concentrically around the core. Winding design considers factors such as current density, insulation performance, and mechanical strength.
Tap changers: Adjust the transformer's output voltage to suit varying grid requirements.
Bushings: Both low-voltage and high-voltage bushings connect the transformer's windings to external circuits.
Gas relays and pressure relief valves: These protective devices monitor pressure and gas conditions within the transformer. When an abnormality occurs, they release pressure or sound an alarm, ensuring safe operation. III. Product Features
The 35kV oil-immersed transformer features the following:
Efficient heat dissipation and cooling: The oil-immersed design allows the transformer windings and core to be directly immersed in insulating oil, effectively improving heat transfer efficiency. The insulating oil transfers heat from the transformer interior to the heat sink through natural convection or forced circulation, where it is then dissipated through air convection, ensuring the transformer maintains a low temperature under normal load.
Excellent insulation: The insulating oil itself has excellent electrical insulation properties, effectively preventing electrical breakdown between windings and between the windings and the core. It also absorbs and releases some electrical charge, helping to reduce the occurrence of partial discharge.
Compact and easy maintenance: Oil-immersed transformers are typically compact, occupying a relatively small footprint, making them easy to install and transport. Their fully sealed design reduces environmental impact on the transformer's interior, reducing maintenance costs.
Wide Application: Oil-immersed transformers are suitable for power systems of various voltage levels and capacities, meeting the needs of diverse users. They maintain excellent operating conditions even in harsh environmental conditions (such as high temperature and humidity). Environmental Protection and Safety: With technological advancements, modern oil-immersed transformers typically use low-toxic, biodegradable insulating oil to minimize environmental impact. During the design and manufacturing process, relevant safety standards and specifications are strictly adhered to to ensure the safety and reliability of the equipment.
Product Specifications
Item Parameter Description
Operation Conditions: Outdoor installation, ambient temperature -40°C to 60°C
Models: S18, S20, S22
Capacity Range: 50-2500kVA
Rated Voltage: High Voltage/Low Voltage: 35/0.4kV
Impedance Voltage: 6.5%
Insulation Class: Class A
Connection Group: Dyn11, Yyn0
Insulation Level: LI200AC85/AC5
Applicable Standards: IEC60076-1, IEC60076-2, IEC60076-3, IEC60076-5
Application Scope
35 KV Oil-Immersed Distribution Transformer is Suitable for distribution systems in urban power grids, industrial parks, commercial buildings, new energy power plants, and rural power grid reconstruction, meeting indoor and outdoor installation requirements. Its compact design and lightweight structure facilitate transportation and deployment, and are particularly suitable for situations where energy saving, quietness, and environmental adaptability are required.
