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Abstract In the transformer industry, ensuring the reliability and safety of components is critical to maintaining operational efficiency and preventing failures. The LISUN LS2789 transformer comprehensive tester provides a robust solution for evaluating transformers, particularly through Megger testing. This paper explores the role of the LS2789 in advancing transformer testing, highlighting its technical capabilities, impact on industry standards, and contributions to enhancing transformer performance. Through detailed analysis and data-driven insights, we demonstrate how the LS2789 supports the development and maintenance of high-quality transformers. 1. Introduction Transformers are essential components in electrical power systems, playing a crucial role in voltage regulation and power distribution. Ensuring their reliability is vital to maintaining system stability and preventing costly failures. Megger testing, a technique used to measure insulation resistance, is one of the most

Abstract The rapid advancement in LED lighting technology has driven the need for precise and reliable testing systems. The LISUN LSRF-3 is a comprehensive testing solution designed to meet the rigorous demands of the LED lighting industry. This paper provides an in-depth analysis of the LSRF-3, focusing on its ability to accurately assess LED start-up, run-up, stabilization, and light flicker performance. Through a detailed examination of the system’s features and testing capabilities, we demonstrate how the LSRF-3 satisfies market requirements and supports the development of high-quality LED products. 1. Introduction With the global shift towards energy-efficient lighting solutions, LEDs have become the predominant choice for residential, commercial, and industrial applications. The performance of LED products is critically assessed based on several parameters, including start-up time, run-up time, stabilization time, and flicker. These parameters are essential in determining the qua

This Indonesia-based product certification body and testing laboratory is one of the leading quality testing and certification institutions in the country. They specialize in providing authoritative certification services for products across various industries, ensuring compliance with both international and domestic quality standards and regulatory requirements. With an experienced professional team comprising engineers, technical experts, and quality control personnel, they are dedicated to offering the most reliable and efficient services to their clients. LISUN recently completed a project providing EMI/EMC laboratory equipment for a client. The client learned about our company through browsing our website and developed a strong interest in our EMI/EMC equipment. The purchased equipment includes: • SG61000-5 Surge Generator with Surge test Desk • ESD61000-2 ESD Simulator Guns with ESD Desk • EFT61000-4 EFT Immunity Measurement with EFT Desk • RF61000-6 RF Conducted Immunity Test Sy

Temperature rise refers to the increase in temperature of various components of electronic and electrical devices relative to the ambient temperature. When a conductor is energized, its surface temperature rises over time due to the heat effect of the current, until it reaches a stable state. The rated temperature rise of a motor is the maximum allowable temperature rise of the winding under a specified ambient temperature (usually 40°C), which depends on the insulation class of the winding. Evaluating temperature rise not only reflects the heat dissipation condition of the motor but also helps assess whether its thermal management is functioning properly. To verify the lifespan and stability of electronic products, temperature rise tests are commonly conducted on critical components (such as IC chips) by operating the device at temperatures above its rated operating temperature (e.g., 25°C) to a specified temperature (e.g., 70°C), recording the temperature rise above the ambient, and

An isolation transformer is a specialized transformer designed for electrical isolation. By providing electrical separation between the input and output windings, it helps prevent the risk of electric shock and ensures electrical safety. Initially, isolation transformers were widely used in the European power industry, and today they find extensive use in electronic industries, industrial and mining enterprises, machine tools, machinery, control power supplies, safety lighting, and indicator light power sources. Typically, isolation transformers have a 1:1 turns ratio, aimed at achieving high electrical isolation and suppressing common-mode interference. 1. Working Principle of Isolation Transformers The core function of an isolation transformer is to provide electrical isolation between the AC power source (primary side) and the load (secondary side). Its primary uses include: Electrical Isolation: Isolates the secondary winding from the ground to prevent electric shock. Voltage Adjus

In-Depth Analysis of Ball Pressure Test Apparatus and Standardization Guidelines of Ball Pressure Test Ball Pressure Test Procedure and Methods: • Sample Pressure Treatment: Place the sample under a pressure device, subjecting it to pressure for one hour to ensure testing in an unusually high-temperature environment. This step aims to simulate the behavior of the sample under specific conditions. •Heating Phase: Put the sample into a preheated oven, ensuring the internal temperature stabilizes at 125°C±2°C. After one hour of constant temperature treatment, remove the ball applied to the sample’s surface to facilitate subsequent observations. • Cooling Process: Immerse the sample, which has undergone heating treatment, quickly into cold water for approximately 10 seconds to rapidly cool it to room temperature. This aids in observing the sample’s reaction to temperature changes. • Observation of Phenomena: Throughout the process, closely observe any changes, deformations, or other phenom

As technology advances and electronic devices become more ubiquitous, the impact of lightning surges on electronic equipment is garnering increasing attention. Lightning surges, which refer to transient overvoltages or overcurrents caused by lightning activity on power or signal lines, can cause severe damage to devices. This article explores the effects of lightning surges on electronic equipment and how to effectively protect against them. 1. Generation and Characteristics of Lightning Surges Lightning surges typically occur within an extremely short time frame, often in the microsecond range or even shorter. This transient phenomenon causes voltage and current levels to exceed the normal operating levels of the equipment by more than double. Due to their rapid onset and quick dissipation, lightning surges can inflict damage on equipment in a very brief period. During a surge, the input filter capacitor charges rapidly, leading to peak currents far exceeding the steady-state input cu