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One article understand: line voltage, phase voltage, phase current and line current difference!

What is three-phase alternating current? Presumably most of the friends engaged in the electrical industry are not strange, but for a beginner it may be half understood. In fact, three-phase alternating current is a form of power transmission, referred to as: three-phase electricity. General household electricity is single-phase AC, but the large-scale production and distribution …

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An experiment with an active filter

The experimental circuit is as follows: Components and parameters: Resistors are RJ14 type resistors with an accuracy of 0.1%, R1=100kΩ, R2=R3=10kΩ, R4=12kΩ, R5=3kΩ. There are two sets of capacitors for comparison: one is a CB4 type capacitor with a high Q value, with a capacity of C1=C2=14.66nF and Q>20000. The other group is the common …

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Structure principle and application of arrester

Lightning arrester is an electrical device that can release lightning or release the power system operating overvoltage energy, protect electrical equipment from instantaneous overvoltage (lightning overvoltage, operating overvoltage, power frequency transient overvoltage impact), and cut off the continuous current, and do not cause system grounding short circuit. The role of the lightning arrester: The lightning …

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Overvoltage Action Counters: Essential Tools for Protecting Power System Stability

Overvoltage action counters are crucial components of power system protection and monitoring. Their role extends beyond merely recording voltage events exceeding normal ranges; they also assist operators in identifying issues and taking measures to ensure the reliability and stability of the power system. This article delves into the working principles, application areas, functions, and the …

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High-Voltage Current-Limiting Fuse: Guardian of Power Systems

Electricity is one of the indispensable infrastructures in modern society, and the safety and stability of power systems are crucial for maintaining normal societal operations. Within power systems, the high-voltage current-limiting fuse serves as a guardian, tasked with protecting and maintaining the integrity of the electrical grid. This article will delve into the working principle, …

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Microcomputer harmonic elimination device

Overview, Working Principle Many components in the power system are inductive or capacitive, such as power transformers, transformers, generators, and arc suppression coils are inductive components, and parallel or series capacitor banks for compensation and parasitic capacitance of high-voltage equipment are capacitive components. However, there are both longitudinal inductance and transverse capacitance between the wires …

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