reliable transformer

Detailed information about S22 oil-immersed transformer.

Ⅰ. Product introduction

Oil-immersed distribution transformers are three-phase, two-winding, non-excitation voltage regulation transformers that comply with high-efficiency and energy-saving standards. These transformers utilize advanced technologies such as high-permeability silicon steel sheets, optimized magnetic circuit design, all-copper windings, and fully sealed oil tanks, significantly reducing no-load losses, load losses, and operational noise. They serve as the primary energy-saving distribution equipment for urban/rural power grids, industrial power distribution, commercial/public buildings, and renewable energy sources. Featuring ONAN self-cooling oil-immersed technology, the product offers excellent short-circuit resistance, extended service life, maintenance-free operation, and low operating costs. It supports various installation options, including indoor/outdoor applications, transformer poles, distribution substations, and power distribution rooms.

II. Main Technical Parameters (Standard characteristics for 10 kV class, customizable upon request)

Main Parameters

• Model: Three-phase two-winding no-load tap-changing voltage transformers

• Rated Power: 10 kVA - 5000 kVA

• Connection Group: Dyn11 (preferred), Yyn0

• Cooling Method: ONAN (oil-immersed self-cooling); high-power models can be equipped with ONAN forced air cooling system.

III. Key Features

1. High efficiency and energy saving, ensuring significant long-term electricity cost savings and optimal lifecycle costs.

2. Fully sealed, maintenance-free design: the corrugated plate oil distribution system combined with complete sealing effectively isolates air and moisture, slowing oil degradation and ensuring long-term oil-free operation with minimal maintenance requirements.

3. High short-circuit resistance and reliability: all-copper winding + multi-layer insulation + integral casting pressing technology provide high short-circuit resistance, excellent overload capacity, and stable operation.

4. Superior heat dissipation performance and high-load adaptability: Oil-cooled self-cooling systems demonstrate high thermal efficiency, capable of withstanding continuous high loads and frequent start-stop cycles without performance degradation under high-temperature conditions.

5. Comprehensive protection: standard configuration includes a safety valve, oil level indicator, and thermometer; optional accessories include a gas relay, temperature controller, and online oil chromatography monitoring, ensuring complete safety.

6. Compact and lightweight design with high power density, facilitating transportation, rack installation, and integration into substations.

IV. Application scenarios

• Industrial power distribution: Main transformers for workshops/parks of energy-intensive enterprises such as chemical, metallurgical, mining, manufacturing, and textile industries, compatible with both impulse loads and continuous operation.

• Commercial and public buildings: Reliable power supply for shopping malls, office buildings, hotels, hospitals, schools, airports, train stations, data centers, and 5G base stations.

• New energy infrastructure: photovoltaic systems, wind power substation transformers for voltage boosting/distribution, and energy storage stations with auxiliary transformers.

• Municipal and residential sectors: residential complexes, renovation of old residential areas, open-platform substations, and containerized substations.

• Special operating conditions: remote mountainous areas, open spaces, high humidity/high dust levels/non-explosive zones (non-flammable and non-explosive areas).