Do you accept FAT(Factory Acceptance Test)?

Yes. It's available. We are responsible for each set transformer's testing.

Do you assign engineer for after-sale service?

Yes. For our products,we all show after-sale guide installation adn question inquiry.

High-Efficiency 25 Mva Three Phase Oil Transformer for Sale

Name: High-Efficiency 25 Mva Three Phase Oil Transformer for Sale
Brand: TSTY ELECTRIC CO., LTD.
SKU: 2077502665

Henan, ChinaTSTY ELECTRIC CO., LTD.

US$2,558.00

1-2 Sets

US$2,458.00

3+ Sets

Sample price:US$2458.00/set.Request sample

Product profile

Customization

Available

Application

Power, Lighting

Phase

Three

Core

Core-type Transformer

Cooling Method

Oil-immersed Type Transformer

Winding Type

Two-winding Transformer

Certification

ISO9001-2000, ISO9001, CCC, CE

Usage

Power Transformer, Distribution Transformer

Frequency Characteristics

Power Frequency

Shape of Core

Ring

Brand

Tsty

Product Name

Oil Immersed Transformer

Type

Oil-Filled Transformer

Material

Copper / Aluminium

Standard

IEC / GB

Transformer Type

S11 Oil-Immersed Transformer

Vector Group

Dyn11 / Yyn0

Warranty

2 Years

Package

Wooden Case

Frequency

50/60Hz

Coil Material

Aluminum/Copper

Connection Group

Yyn0/Dyn11

Transport Package

Wooden Case or Pallet

Specification

IEC/ANSI/IEEE

Trademark

TSTY

Origin

China

HS Code

8504220000

Key features

Customizable Voltage and Frequency: Rated voltage, frequency (50/60Hz), and connection groups can be customized to meet specific customer requirements.

Fully Sealed Oil-Immersed Design: Eliminates oil conservator, uses corrugated oil tank for automatic oil volume adjustment, preventing oil deterioration and insulation aging.

Low Loss and High Efficiency: Developed for low noise, low loss, and high efficiency to achieve energy-saving effects and reduce pollution.

Comprehensive Safety Protection: Equipped with Buchholz relay, pressure relief device, thermal relay, and temperature detector to ensure safe operation.

Global Certifications: Complies with IEC standards and holds CE, CCC, ISO9001, UL, CSA, and Type Test Report certifications.

Versatile Application Scenarios: Suitable for power stations, mines, hospitals, airports, chemical plants, nuclear power plants, and photovoltaic projects.

Lifetime Service System: Provides lifelong service with regular technician visits to ensure long-term, safe, and reliable product use.

Flexible Cooling and Connection: Offers ONAN cooling, ONAN/ONAF options, and connection groups like Dyn11 or Yyn0 as requested.

Company profile

Importers and Exporters100% Finished Products InspectionProduct CertificationProduction Process Visualization

TSTY ELECTRIC CO., LTD.

Henan, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2020-06-01 CertifiedNearest Port: Qingdao Port,Average Response Time: ≤8.30h CertifiedTerms of Payment: LC, T/T, PayPal, etc.

AI-Powered supplier vetting

SummaryThe supplier is a limited company with 513 employees and no stated parent group. It offers oil-immersed and dry-type transformers, transformer substations, and high- and low-voltage switchgear. Production evidence includes four production lines, stated annual output for several product categories, broad export coverage, and off-peak lead time within 15 workdays. The supplier demonstrates R&D, ODM, OEM, private-mold, 3D design, and sample/design customization capabilities, but has no available SDK. Certifications include ISO 9001:2015, ISO 45001:2018, ISO 14001, CE, and UL. Overseas agents or branches, inventory capability, and participation in ELEKTRO 2026 are reported, while overseas warehouses and showrooms are unavailable. Financial information is identified for 2023–2025, but no financial performance values are provided. Customer references are limited to stated OEM service for popular brands.

Supplier typeThe supplier is a limited company, is not stated to belong to a larger company group, and operates in power equipment and electrical-component sales, including transformers, switchgear-related equipment, and associated electrical products. This identifies a specialized electrical equipment supplier rather than a general trading entity, although the stated number of cooperative suppliers is zero and the business scope excerpt is incomplete.

CertificationsThe supplier reports ISO 9001:2015, ISO 45001:2018, and ISO 14001 certifications, along with CE and UL product-certification capability. These explicitly support quality, occupational-safety, environmental-management, and product-compliance capabilities.

After-Sales capabilityThe supplier reports 100 qualified service-capability suppliers, documented procedures and records for supplier assessment, and a corrective and preventive action mechanism. It also has inventory capability and overseas agents or branches serving Tanzania, Zambia, Ghana, and other countries, but has no overseas warehouse or showroom; the available evidence supports service infrastructure but not complete global after-sales coverage.

R&D capabilityThe supplier reports private-mold R&D, professional technical-supplier capability, 3D software design, new products within the past year, ODM services, and OEM services for popular brands. However, it explicitly has no available SDK, so innovation capability is demonstrated in product and design development but not across all technical interfaces.

Production capacityThe supplier operates four production lines and reports output of 6,000 substations, 10,000 oil transformers, 5,400 switchgear units, and 11,000 dry-type transformers, with off-peak lead time within 15 workdays. It has in-stock capability and broad export markets, but no valid contract with an associated subcontractor, which is a stated manufacturing-governance gap.

Customization capabilityThe supplier explicitly provides customization from samples and designs, private-mold development, 3D software design services, ODM, and OEM services. These capabilities directly support customized product development and manufacturing.

Product Q&A

Q:Who are we?

We are a big professional manufacturer of oil immersed transformer, dry type transformer, transformer substation,HV and LV switchgear, established in 2011 year .

Q:Why should you buy from us not from other suppliers?

As an enterprise specializing in transformer production for 12 years. ISO9001-2008, OHSAS 18001:2007, ISO4001:2004L .CE,CCC,UL,CSA,TYPE TEST REPORT,etc certificates.

Q:How do transformers been shipped?

Transformers always been delivered by ship,train or truck for oversea,which with main active body in bulk and accessories in wooden cases.

Q:Can your product be customerized?

Considering differences in voltage, frequency and other speciality of transformer product in different countries and regions,our product can be customerized according to your requirements.

Q:Do you offer guarantee for the products?

Yes. We offer at least two years guarantee for all of our transformers.