Tanaka Electric
| Customization: | Available |
|---|---|
| Application: | Power, Electronic |
| Phase: | Three |
Definition & Structure
An oil-immersed transformer is a common power equipment that performs critical tasks such as voltage conversion and power distribution in electrical grids. It is widely used in urban/rural power grid upgrades, industrial/mining applications, combined transformers, and prefabricated substations.



Key Components Include:
| Product Name | Models | Features | Key Parameters |
|---|---|---|---|
| Oil-immersed transformer | S11 / S13 / S20 / S22 | Energy saving, Low load loss, Lightning resistance, Short-circuit resistance | 30-3000kva, 10kv-110kv Input, 50/60Hz, ONAN Cooling |






We are a high-tech enterprise specialized in the production, development, and sales of transformers and related products. With a total investment of 258 million Yuan and a registered capital of 55 million Yuan, the company employs 270 staff, including 7 senior engineers and over 110 senior technical personnel. We strictly follow the ISO9000 quality management system to provide excellent quality products.




A1: They are widely used in urban and rural power grid upgrades, industrial and mining operations, prefabricated substations, and combined transformers for efficient voltage conversion and power distribution.
A2: We offer Oil-Natural Air-Natural (ONAN), Oil-Natural Air-Forced (ONAF), and Oil-Forced Air-Forced (OFAF) systems to meet different power load and environmental requirements.
A3: The laminated core design with minimal air gaps significantly reduces energy losses and operation noise, while the near-circular cross-section improves three-phase balance.
A4: The top oil temperature should generally be ≤ 90°C, with 85°C recommended for long-term longevity. Alarms are typically triggered once the temperature reaches 80°C.
A5: Yes, they are designed with an emergency overload capacity of 1.1 to 1.2 times the rated current. However, it is essential to monitor temperature and reduce load if alarms persist.
A6: Our transformers are manufactured according to the IEC60076 standard and our facility is ISO9001 certified, ensuring global quality compliance.