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24 08,2024
What are the destructive effects of corona discharge on insulation materials?
Discover how corona discharge damages insulation materials through mechanical bombardment, chemical corrosion, and localized overheating. Learn why this electrical phenomenon accelerates insulation breakdown in transformers and high-voltage equipment, creating safety risks. We explain how ozone (O₃) and nitric acid (HNO₃) degrade organic insulation, plus strategies like corona shielding to prevent failures. Lushan (est. 1975) designs corona-resistant transformers for industries like renewable energy and medical imaging.
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21 08,2024
What operations are involved in tightening the transformer enclosure?
Learn the essential transformer enclosure tightening procedures to ensure structural stability and electrical safety. This guide covers yoke bolt torqueing, strap nut installation, axial core compression, and metal bolt tightening with proper torque values. Discover why correct washer placement and uniform insulation bolt heights prevent failures in power transformers. Lushan (est. 1975) manufactures reliable transformers for renewable energy, medical, and industrial applications.
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05 08,2024
What categories can transformers be classified into based on the cooling methods?
Transformers are classified into 4 main cooling types: natural air cooling (AN), forced air cooling (AF), oil-immersed cooling (ONAN/OFAN), and advanced evaporative cooling using fluorocarbon fluids. Each method suits different applications - from urban power grids to nuclear plants.
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01 08,2024
What methods are used for the installation of the flexible cable leads for the wife-carrying ducts?
What methods are used for the installation of the flexible cable leads for the wife-carrying ducts? When installing bushings for transformers of 110kV and above, the use of soft cable leads can be labor-intensive and time-consuming, often resulting in...
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15 07,2024
What are the steps involved in vacuum pressure impregnation technology?
What are the steps involved in vacuum pressure impregnation technology? Preheating: Preheat the coil to 135-150°C and maintain for several hours, then remove the coil and lower the surface temperature. Vacuum: Open the impregnation tank cover, pla...
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11 07,2024
What is the basic concept of overvoltage?
What is the basic concept of overvoltage? In the operation of various electrical equipment in power systems, besides withstanding normal system voltages, they also encounter various types of overvoltages. Overvoltages are generally classified into two...
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10 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...
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09 07,2024
What are the routine electrical tests for transformers?
What are the routine electrical tests for transformers? a. Voltage Ratio Test: Used to verify the voltage ratio and detect faults such as winding inter-turn or inter-layer short circuits, and check if switch leads are connected incorrectly. b. Win...
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08 07,2024
What is a steelmaking arc furnace transformer?
What is a steelmaking arc furnace transformer? A steelmaking arc furnace transformer is a special type of electric furnace transformer with various categories, including three-phase steelmaking arc furnace, three-phase ore-heating furnace, single-phas...
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03 07,2024
What is the voltage phase relationship of transformer windings?
What is the voltage phase relationship of transformer windings? The voltage phase relationship of transformer windings refers to understanding the relationship of voltage phases between high, medium, and low voltage windings. This is typically the fir...
