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Partial discharge
2023-12-22Wuhan UHV specializes in the production of partial discharge testers, which can help many power workers to carry out all kinds of power tests more conveniently. Partial discharge, mainly refers to high-voltage electrical equipment. The insulator of electrical equipment is discharged locally under the action of a sufficiently strong electric field. This discharge is limited only by the fact that the insulation between the conductors is short and no conductive path is formed. Each partial discharge will have a certain effect on the insulating medium. Slight partial discharge has less effect on the insulation of power equipment, and the dielectric strength decreases more slowly. Strong partial discharge can cause the dielectric strength to decrease rapidly. This is an important factor that causes insulation damage to high-voltage power equipment. Therefore, when designing the insulation of high-voltage power equipment, the role of long-term operating voltage should be considered, and its
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What is a Transformer Test Bench
2023-12-15Transformer comprehensive characteristics test bench is a device used for transformer characteristics testing, which can be used to test various types and specifications of transformers. The test bench can measure and record various electrical parameters of the transformer, including resistance, inductance, mutual inductance, short-circuit impedance, no-load loss, etc. The transformer comprehensive characteristics test bench can be used for the following test items: 1. Ratio test: measure the ratio of the transformer and check whether the ratio meets the design requirements. 2. No-load loss test: test the loss of the transformer under no-load conditions, including iron loss and copper loss. 3. Short-circuit impedance test: test the resistance and inductance parameters of the transformer in the short-circuit state to determine its electrical performance. 4. Load loss test: test the loss of the transformer under load conditions, including iron loss and copper loss. 5. Temperature rise te
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Vacuum test method for vacuum circuit breaker
2023-12-15The vacuum level test of the vacuum circuit breaker is very important. Once the vacuum is broken, the arc cannot be extinguished, causing the circuit breaker to explode. The vacuum test method is as follows:1. Visual inspection method. If the vacuum interrupter is a glass shell, it can be judged by the color of the suction film applied to the inner wall. The vacuum degree is good, and the film is mirror-shaped, and the vacuum degree is good, the film is mirror-shaped. It is milky white when the vacuum degree is different. Although this method is not very accurate, it can be used as a reference.2. Power frequency withstand voltage method. In the open state, the power frequency test voltage is carried out between the fractures, and it can withstand more than 10s under the power frequency withstand voltage, indicating that the vacuum degree is good. If the current also increases in the process of voltage increase, it is considered unqualified if it exceeds 5A. Of course, breakdown in the
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What is the cause of the circuit breaker failure？
2023-12-08UHV Power's circuit breaker tester can help many power workers to carry out various power tests more conveniently. Reason 1: Overload Overload protection is the basic function of a circuit breaker, and any circuit breaker has this function. Overload protection refers to the current in a circuit that exceeds the predetermined value of the circuit breaker. For example, if the predetermined value of the circuit breaker is 16A, and the actual current in the circuit is 17A, the circuit breaker will automatically trip. This is based on the maximum current protected by the circuit breaker, such as outlets, wires, and appliances. Accessory-free circuit breakers will almost certainly be overloaded; For circuit breakers with accessories, it is essential to observe if the accessories change. If there is no change in the fittings, it is also due to an overload of the circuit. The reason why a circuit is overloaded is that the total power of the appliances used at the same time in the circuit i
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Viscosity measurement method
2023-12-08The kinematic viscosity tester of Wuhan UHV can help many power workers to carry out various power tests more conveniently.There are three measurement methods for viscosity measurement: dynamic viscosity, kinematic viscosity, and conditional viscosity.1. Dynamic viscosity: the resistance generated when two liquid layers are separated by 1 cm, their area is 1 (square centimeter), the relative moving speed is 1 cm/s, and the unit is grams/mile/second. 1 g/cm·s = 1 equilibrium General: The industrial unit of dynamic viscosity is expressed in equilibrium.2. Kinematic viscosity: When the temperature is T°C, the kinematic viscosity is represented by symbols. In the International System of Units, the unit of kinematic viscosity is ST, which is square meters per second.) means that the unit is millimeters per second (i.e., 1CST = 1M2/s). Kinematic viscosity is widely used in the viscosity determination of liquid petroleum products such as jet fuel, diesel, and lubricating oil, dark petroleum p
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Introduction to Partial Discharge Testing Equipment
2023-12-07Partial discharge resistant testing equipment is a crucial apparatus in high-voltage electrical testing, primarily utilized to evaluate the insulation integrity of power systems and equipment, ensuring operational safety and reliability. This specialized equipment serves the pivotal purpose of identifying partial discharge (PD) occurrences within electrical insulation. PD is an early indicator of insulation degradation or flaws in high-voltage systems, which, if left unaddressed, can lead to catastrophic failures. The testing apparatus allows engineers to detect and analyze these minute discharges, enabling proactive maintenance and preventing potential faults that could compromise system efficiency. Operating on the principle of subjecting insulation to high voltages while monitoring for PD activity, this testing device provides invaluable insights into the insulation's condition. It assesses the endurance of insulation materials under high-stress conditions, crucial for evaluatin
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Series Resonance in Power Testing: Application and Utility
2023-12-07Series resonance serves as a pivotal principle in power testing, offering profound applications and methodologies that significantly enhance the efficiency and precision of electrical measurements. In the realm of power testing, series resonance is employed in various capacities, primarily for impedance measurement and power factor correction. By employing resonant circuits at specific frequencies, engineers can accurately measure impedance values of electrical components and systems. This precise measurement aids in evaluating the health, quality, and performance of power distribution networks, transformers, and other electrical apparatus. Moreover, series resonance finds extensive usage in power factor correction. Through the careful orchestration of inductive and capacitive elements in series, this technique minimizes reactive power losses in electrical systems, thereby optimizing energy efficiency and reducing overall power consumption. One of the prominent applications of series r
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DC High Voltage Generator
2023-11-22A DC high voltage generator is a device used to produce high voltage and is commonly employed in various scientific, engineering, and industrial fields. It converts low-voltage DC into high-voltage output and finds widespread application in experiments, testing, and production processes across different domains.Applications:1.Scientific Research: DC high voltage generators play a crucial role in scientific experiments, particularly in physics, chemistry, and biology. They are used to generate high electric field intensity for ion acceleration, particle physics experiments, and research conducted in vacuum environments.2.Medical Field: In medical equipment, DC high voltage generators are utilized in X-ray machines, electron microscopes, and other imaging devices. These devices require high voltage to produce X-rays or achieve high-resolution imaging.3.Industrial Applications: Certain industrial processes demand high voltage, such as electrostatic spraying, electron beam welding, and mat
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VLF Hi-pot Tester
2023-11-22A VLF Hi-pot Tester is a specialized device designed to produce high-voltage output at extremely low frequencies. This equipment finds application across diverse fields due to its unique capabilities in generating high voltages at low frequencies. Introduction: The VLF Hi-pot Tester operates by converting low-voltage input to high-voltage output, typically within the frequency range of a few hertz or below. Its applications span various domains, including scientific research, medical technology, industrial processes, and educational purposes. Applications: 1.Scientific Research: In scientific experiments and studies, this generator facilitates investigations requiring high voltages at low frequencies. It supports research in fields such as geophysics, environmental science, and certain aspects of particle physics. 2.Medical Technology: Some medical devices, like Magnetic Resonance Imaging (MRI) machines, require high-voltage, low-frequency power sources. VLF Hi-pot Testers play a cruci
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2022-02-02 יותר -
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2022-02-02 יותר
