EN
FR
DE
ES
-
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
-
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
-
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.
-
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
-
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...
-
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...
-
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...
-
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...
-
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...
-
29 03,2024
Why is vacuum drying and impregnation necessary for windings?
Why is vacuum drying and impregnation necessary for windings?Drying the winding helps to remove moisture from the insulation components. This not only enhances the insulation's withstand voltage level but also causes the insulation to contract to its ...
