138kv Kema Tested Power Transformer

Model NO.: SFZ-40000/138


Phase: Three


Cooling Method: Oil-immersed Type Transformer


Certification: ISO9001-2000


Frequency Characteristics: Power Frequency


Brand: Tianan


Environment: Outdoor


Insulation Oil: High Quality Grade Mineral Oil


Specification: IEC


HS Code: 850423110




Application: Power


Coil: Core-type Transformer


Winding Type: Two-winding Transformer


Usage: Power Transformer


Shape of Coil: Ring


Altitude: up to 1, 000m Above Sea Level


Special Conditions: Depends on The Customer


Trademark: TIANAN


Origin: Ningbo, Zhejiang, China


Our company is well recognized manufacturer, exporter and trader of premium quality assortment of Power Transformer in Ningbo, Zhejiang, China.



Rated voltage: 138kV

Rated capacity: 3500kVA-120000kVA

Frequency: 50Hz, 60Hz

Tapping range: +-8*1.25%

Vector group: Ynd11, Ynyn0d11

Cooling: ONAN, ONAF

Tap changer: OLTC, NLTC

On-load loss: low

No-load loss: low



Product Features



1. Product standards

GB1094.1 ~ 2-1996

GB1094.3, 5-1985

GB/T6451-1995

IEC76



2. Low loss

- Optimization of electromagnetic calculations, using combined technology of electrical shielding and magnetic circuit, effectively controlled leakage, so as to reduce the load loss and to avoid partial overheating.

- Use high quality cold-rolled lattice orientation high permeability silicon steel, to reduce the load loss, no-load current.

- Core all-helical stacking with STEP joints, and advanced stacking process, reduced the load loss, load current and electromagnetic noise.



3. Low partial discharge

To ensure the safe and steady operation of the transformer under continuous rated voltage, our Electric Power Research Institute conducted a lot of research to develop a more reasonable insulation structure, plus the strict technology specifications and technical staff experience, ensured the low partial discharge of our products.



4. High strength

- Adoption of six-side method positioning for the body, meets the transportation requirements of, horizontal acceleration not more than 0.3G, vertical direction not greater than 0.15g.

- Upper and Lower Clamps and the formation of tight fixed side beam frame.

- The tank can withstand the vacuum test and required positive pressure test.



5. Low Noise

- Use of high-quality core silicon steel;

- Core STEP stepping joints;

- Reduction of the flux density, despite of the increase of cost;

- Use low-noise fan as the air cooling equipment;

- Increase the shock absorbing measures;

- Well interior-protection, to avoid direct rigid contact of the body and tank;



6. Maintenance-free

Our company adopts the domestic leading technology, use fully enclosed structure for the transformer tank, ensuring product life of 30 years, and maintenance-free operation.

Contact us if you need more details on Transformer. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Power Transformer、Furnace Transformer. If these products fail to match your need, please contact us and we would like to provide relevant information.

Product Categories : Power Transformer