Blogs-Hebei Zhongbei Transformer Co., Ltd

What is Impedance Voltage of Oil-Immersed Transformers

Impedance voltage(also known as short-circuit voltage)is a key technical parameter for oil-immersed transformers.It refers to the percentage of the rated voltage that needs to be applied to one winding,when the other wind...

Why should the iron core of oil-immersed transformer be grounded at multiple points?

Oil‑immersed transformer cores must be single‑point grounded; multi‑point grounding is a severe fault, not a design requirement. Why the Core Needs (Single‑Point) Grounding During operation, the core and internal ...

What Does the Rated Temperature Rise of an Oil-Immersed Transformer Stand For?

Rated temperature rise is a core thermal performance index,referring to the maximum allowable temperature difference between the transformer’s key components and the ambient air temperature when operating continuously u...

How to Distinguish Between On-Load Tap Changer and Off-Circuit Tap Changer Oil-Immersed Transformers

On-load tap changer(OLTC)and off-circuit tap changer(OCTC,no-load type)transformers differ significantly in structure,appearance,operation rules and application scenarios.You can make a quick distinction from on-site visu...

How to Deal with Excessive Vibration of In-Service Oil-Immersed Transformers

Excessive vibration not only generates loud noise but also loosens internal components,damages insulation,accelerates oil leakage and shortens equipment service life.Troubleshoot and resolve the issue step by step by chec...

Troubleshooting Local Overheating of Oil-Immersed Transformers

Local overheating is a typical abnormal operating condition. It accelerates insulation aging, deteriorates insulating oil and may trigger protection tripping or even equipment failure. The troubleshooting follows a logica...