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 spe...
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 mini...
An impedance analyzer is a sophisticated electronic testing instrument used to measure complex resistance variations with frequency. In modern electronics, impedance is a crucial parameter for evaluating the performance of electronic components, circuits, and material properties. Beyond traditional component analysis, impedance analysis is extensively used in the study of dielectric materials, inc...
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...
Electrostatic Discharge (ESD) Immunity Testing Electrostatic discharge (ESD) immunity testing is a crucial aspect of electromagnetic compatibility testing. The national standard for ESD immunity testing is GB/T 17626.2, which is equivalent to the international standard IEC 61000-4-2. ESD is a common natural phenomenon, especially prominent in dry environments. For example, when a person walks on a...
In our daily lives, electronic and electrical products generally come with certain levels of dust and water resistance. These protective capabilities are crucial for safeguarding products from harsh environmental impacts, extending equipment lifespan, and ensuring their proper functioning. Dust testing is commonly used to assess the protective capabilities of electronic products in dusty environme...
The Fast Photo-Electric Brightness Test Meter consists of three main parts: electrical parameter measurement circuit, photometric parameter measurement circuit and CPU system circuit. The voltage and current signals are amplified and sent to the high-speed A/D converter, and then the converted digital signal is sent to the microprocessor, the input current signal of the brightness detector is sent...
The damped oscillatory wave generator plays a crucial role in assessing the immunity of household, commercial, and industrial electrical equipment to disturbances. This device simulates repetitive damped oscillatory waves on power cables, control cables, and signal cables found in high and medium voltage substations, providing an ideal standard and basis for electromagnetic compatibility (EMC) tes...
Waterproof test chambers are critical tools for evaluating the water resistance of household, commercial, and industrial electrical and electronic equipment. These chambers adhere to international standards such as IEC 60529, GB 4208, GB/T 10485-2007, DIN 40050-9, ISO 20653, and ISO 16750, providing standardized testing for various levels of water protection. The IP (Ingress Protection) rating sys...
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