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27 03,2023
Common Professional Terms and Explanations in Transformers
Transformers, as complex electrical devices, have a range of technical terms that are commonly used in the industry. Some of the most common terms include: Turns ratio: This is the ratio of the number of turns of wire on the primary winding to the number ...
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03 06,2023
Calculation of Single-phase and Three-phase Transformer Capacity
Transformers are essential electrical devices that are used to transfer electrical energy from one circuit to another. They are classified into two types: single-phase transformer and three-phase transformer. The calculation of their capacity is crucial i...
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12 06,2025
Why Do Reactors Overheat and Burn Out? —Top Causes and Effective Solutions
As global energy demands surge and power systems grow more complex, reactors (critical devices for reactive power compensation and harmonic suppression) play a vital role in grid stability. However, frequent reactor failures, particularly overheating, have become a costly challenge. According to the International Energy Agency (IEA), 22% of global industrial power outages are caused by reactor burnout, with 75% of failures linked to thermal runaway. This results in annual losses exceeding $10 billion. This article explores the root causes of reactor overheating and offers proven solutions to reduce maintenance costs by 30%-50% annually, aligning with IEC 60076-27 and IEEE C57.21 standards.
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30 05,2025
Evolution of Transformer Winding Materials —Balancing Cost and Performance: From Electrolytic Copper to Copper-Clad Aluminum
Explore the evolution of transformer winding materials—from pure copper to copper-clad aluminum (CCA) and nano-coated conductors. Learn how CCA cuts costs by 18% while maintaining 82% conductivity, and discover CCS for short-circuit resistance. Compliant with IEC 60076-7 & IEEE C57.18.10.
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28 05,2025
What Are Current Limiting Reactors? —The Secret Weapon for Power System Short Circuit Protection
Current limiting reactors prevent 60-80% of short circuit damage, saving $8B annually. Learn about dry-type air-core designs (50kA/3s tolerance), tap-changer adjustment (±10% reactance), and damping windings (65% overvoltage reduction). Complies with IEC 60076-6 & IEEE C57.16 standards.
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21 10,2024
How to Reduce No-Load Losses in Transformers?
No-load losses in transformers refer to the power consumed when the transformer's secondary winding is open (i.e., not connected to a load). These losses mainly include core lsses and stray magnetic losses. No-load losses are inherent...
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18 10,2024
What are the Processes and Causes of Insulation Aging?
Discover the four primary mechanisms of insulation aging: thermal oxidation, electrical partial discharge, mechanical stress fatigue, and environmental degradation. Learn how temperature (>130°C), voltage stress (>3kV/mm), thermal cycling, and humidity (>85% RH) collectively reduce dielectric strength by 50-70% over time. Lushan’s 49 years of transformer engineering expertise reveals preventive measures to extend insulation life in harsh industrial, renewable energy, and rail applications.
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17 10,2024
What are the characteristics of foil winding?
Foil winding is a critical component in modern transformers and reactors, offering unmatched efficiency, durability, and performance. Known for its high automation in production, foil winding reduces manufacturing errors while ensuring consistent quality. Its large interlayer and longitudinal capacitance minimizes parasitic inductance, making it ideal for high-frequency applications. With exceptional mechanical strength, foil windings withstand short-circuit forces, enhancing equipment lifespan. The precise geometric dimensions simplify installation and improve insulation safety.
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15 10,2024
How to Reduce No-Load Losses in Transformers?
No-load loss in transformers—comprising core loss (hysteresis & eddy currents) and stray magnetic loss—impacts grid stability and efficiency. To minimize these losses: Material Selection: Use high-permeability grain-oriented silicon steel sheets (thickness ≤0.27mm, unit loss
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14 10,2024
How is an Epoxy Resin Dry-Type Transformer Cast and Molded?
Discover the precise manufacturing process of epoxy resin dry-type transformers, a critical component in modern power systems. This detailed guide covers: Preparation Phase: Importance of clean molds and proper coil placement Epoxy Resin Mixing: Critical ratio control (typically 1:1 to 1:4 resin-to-hardener) and degassing requirements Casting Process: Temperature monitoring (typically 40-60°C) and bubble prevention techniques Curing Cycle: Optimal 8-12 hour cure at 80-120°C for maximum dielectric strength Post-Processing: Controlled cooling rates (2-5°C/minute) to prevent thermal stress
