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25 12,2024
How Many Types of Overvoltages Can a Transformer in Operation Suffer?
Explains the main types of transformer overvoltages: lightning strikes, switching surges and temporary overvoltages that affect power systems.
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31 07,2024
What are the Chemical Composition and Properties of Cold-Rolled Silicon Steel Sheets?
Analyzes chemical composition and magnetic properties of cold-rolled silicon steel sheets used in transformer and reactor cores
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31 07,2024
What sealing structure should be adopted for oil-immersed transformers?
Explores effective sealing methods for oil-immersed transformers including gasket, welding and flange techniques to prevent oil leakage
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30 07,2024
What kind of sealing material should be chosen for oil-immersed transformers?
Selecting the right sealing material for oil-immersed transformers is critical for durability and leak prevention. Ideal materials like nitrile rubber compounds (grades 58-421, 8143-20, B-9)withstand extreme conditions: transformer oil exposure, pressure up to 0.5 MPa, and temperatures from -45°C to 115°C. Modern nitrile rubber outperforms older materials with lower permanent deformation (50% vs. 66–85%) and broader temperature tolerance (-59°C to 120°C). Lushan Transformers—a 49-year expert in power transformers and reactors—uses these advanced seals in products like three-phase transformers, epoxy resin HV transformers, and filtering reactors.
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27 07,2024
How is the understanding of withstand voltage and test voltage?
Transformers and choke coils face dangerous transient overvoltages from power switching (8-10× normal voltage) and lightning strikes (up to 3000V). This guide explains why withstand voltage tests apply 2× working voltage +500V (for
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19 07,2024
How does wind speed affect the operation of transformers?
How does wind speed affect the operation of transformers? Typically, the maximum wind speed at a certain distance above the ground is specified over a specific period. For example, at a height of 10 meters above the ground, the wind speed reaches 35 m...
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17 07,2024
What are the inspection tasks for dry-type transformers?
What are the inspection tasks for dry-type transformers? Check for abnormal sounds and vibrations. Look for signs of local overheating, such as insulation surface tracking and discoloration caused by harmful gas corrosion and carbonization. Ve...
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23 04,2024
How to analyze and dissect three-phase transformers?
How to analyze and dissectthree-phasetransformers? A transformer is a device that transforms AC voltage, current, and impedance. When an AC current flows through the primary coil, an alternating magnetic flux is generated in the core (or magnetic core...
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22 04,2024
What protective devices does a three-phase transformer have?
What protective devices does a three-phase transformer have? Microcomputer Protection Device: The microcomputer protection device for three-phase transformers consists of highly integrated components, chip-on-bus single-chip micro-controllers, hi...
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30 03,2024
How to choose the cooling method for oil-immersed and dry-type forced air-cooled transformers?
How to choose the cooling method for oil-immersed and dry-type forced air-cooled transformers?Oil-immersed forced air-cooled transformers offer two selectable cooling methods: oil-immersed forced air cooling (ONAF) and oil-immersed self-cooling (ONAN). Ge...
