125kVA 22kv ONAN Dyn11 3 Phase Distribution Electrical Power Transformer

Henan GNEE Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of 125kva 22kv onan dyn11 3 phase distribution electrical power transformer in China. If you're going to buy customized 125kva 22kv onan dyn11 3 phase distribution electrical power transformer made in China, welcome to get quotation from our factory. Quality products and reasonable price are available.

 

 

As an experienced manufacturer of electrical power transformers, GNEE ELECTRIC focuses on the design and production of distribution transformers for utility, industrial, and infrastructure projects worldwide. Among our medium-voltage solutions, the 125kVA 22kV ONAN Dyn11 3 Phase Distribution Electrical Power Transformer is developed specifically for stable and efficient power distribution at the 22kV level.

 

In modern power networks, the 125kVA 22kV ONAN Dyn11 3 Phase Distribution Electrical Power Transformer plays a critical role in stepping down medium voltage to low voltage while maintaining phase balance and system reliability.

 

This 125kVA 22kV ONAN Dyn11 3 Phase Distribution Electrical Power Transformer is manufactured using oil-immersed insulation and natural cooling technology, making it suitable for continuous operation in outdoor and semi-outdoor environments.

 

Transformer core assembly and coil winding process

 

 

The 125kVA 22kV ONAN Dyn11 3 Phase Distribution Electrical Power Transformer is widely applied in medium-voltage distribution systems where 22kV networks are commonly used. Typical applications include urban distribution substations, industrial power supply systems, and infrastructure projects requiring stable three-phase output.

 

By adopting the Dyn11 vector group, the transformer ensures effective phase displacement and improved compatibility with downstream low-voltage loads. This configuration helps reduce harmonic impact, improves voltage quality, and supports the safe operation of sensitive electrical equipment connected to the distribution network.

 

The compact oil-immersed design also allows the transformer to be installed in limited spaces while maintaining adequate insulation strength and thermal performance.

 

 

The 125kVA 22kV ONAN Dyn11 3 Phase Distribution Electrical Power Transformer is built with a laminated silicon steel core designed to minimize no-load losses and noise. High-quality copper or aluminum windings are precisely manufactured to ensure consistent electrical performance and mechanical strength.

 

The sealed oil tank structure protects internal components from moisture, dust, and environmental contamination. ONAN cooling enables natural heat dissipation through transformer oil and ambient air, reducing the need for auxiliary cooling devices and lowering operational risk.

 

Structural Design of 125kVA 22kV ONAN Dyn11 3 Phase Distribution Electrical Power Transformer

 

 

At GNEE ELECTRIC, quality assurance is integrated into every production stage of the 125kVA 22kV ONAN Dyn11 3 Phase Distribution Electrical Power Transformer. From raw material inspection to final routine testing, each unit is verified to meet IEC requirements and project specifications.

 

Routine tests include:

• Winding resistance measurement
• Voltage ratio and vector group verification
• Insulation resistance and dielectric tests
• Oil leakage and sealing inspection

These procedures ensure long-term reliability, predictable performance, and safe operation throughout the transformer's service life.

 

 

Item	Specification
Rated Capacity	125 kVA
Rated Voltage (HV)	22 kV
Rated Voltage (LV)	400 V / 415 V / Customized
Phase	Three Phase
Frequency	50 / 60 Hz
Cooling Method	ONAN
Vector Group	Dyn11
Insulation Class	A
Temperature Rise	≤65 K
Tap Changer	Off-circuit tap changer
Standard	IEC 60076

Technical parameters can be customized according to local grid requirements.

 

 

The 125kVA 22kV ONAN Dyn11 3 Phase Distribution Electrical Power Transformer is a reliable solution for medium-voltage power distribution, combining stable performance, proven insulation technology, and system compatibility.

 

As a manufacturer with practical project experience, GNEE ELECTRIC provides not only products, but also technical support you can rely on.

Request A Quote

 

If you are sourcing a dependable 125kVA 22kV ONAN Dyn11 3 Phase Distribution Electrical Power Transformer, contact GNEE ELECTRIC today for drawings, lead time, and a competitive quotation.

👉 Send your inquiry now and let us support your power distribution project.

 

 

Commercial buildings and office complexes

 

Industrial plants and production lines

 

Hospitals and medical facilities

 

Data centers and communication rooms

 

Schools and public infrastructure

 

 

 

 

 

Hot Tags: 125kva 22kv onan dyn11 3 phase distribution electrical power transformer, China 125kva 22kv onan dyn11 3 phase distribution electrical power transformer manufacturers, suppliers, factory, 150kVA Oil Immersed Distribution Transformer, 75kVA Oil Immersed Distribution Transformers, transformer oil spill containment, Oil Insulated Current Transformers, Oil Immersed Rectifier Transformer, transformer magnetic field shielding