Blogs-Hebei Zhongbei Transformer Co., Ltd

How to Solve Three-Phase Current Unbalance of Oil-Immersed Transformers

Three-phase current unbalance is a common operating fault. Severe unbalance will increase loss, cause local overheating, damage insulation and trigger protection tripping. The solution follows the steps of fault inspectio...

How to Adjust Oil-Immersed Transformers When Voltage Is Too High or Too Low

Unbalanced grid voltage (overvoltage or undervoltage) affects power quality, equipment safety and service life. The adjustment method depends on the transformer type: off-circuit tap changer (no-load type) and on-load tap...

How to Deal with Solidified Insulating Oil of Outdoor Oil-Immersed Transformers in Winter

Low temperature in cold regions may cause insulating oil to thicken or even solidify, which blocks oil circulation, weakens heat dissipation, raises operating temperature and triggers protection tripping. Below are target...

Advantages of S20 & S22 High-Efficiency Oil-Immersed Transformers

S20(Class 2 energy efficiency)and S22(Class 1 energy efficiency)are China’s top-tier oil-immersed distribution transformers per GB 20052-2020,featuring ultra-low losses,robust reliability,minimal maintenance,and full li...

Selection of Corrosion-Resistant Oil-Immersed Transformers for Mining and Chemical Areas

Mining and chemical regions feature severe corrosion (dust, moisture, acid-base/salt spray, hazardous gases like H₂S, Cl₂, SO₂) and potential explosion risks. The selection prioritizes corrosion grade matching, full...

Key Inspection Items for Outdoor Oil-Immersed Transformers in Rainy Seasons

Rain,high humidity,lightning and waterlogging bring multiple risks to outdoor transformers.The patrol focuses on waterproofing,drainage,lightning protection,insulation,sealing and operational status to eliminate hidden da...