Critical power

How Low-Voltage Active Power Filters Compensate for Harmonics in the Power Grid
Jun , 16 2025
With the increasing use of nonlinear loads such as variable frequency drives, rectifiers, and other power electronic devices, power grid harmonics have become a common problem in low-voltage electrical systems. Low-voltage active power filters (APFs) play a key role in detecting and mitigating harmonic distortion to improve power quality. Here’s how APFs work to actively compensate for harmonics i...
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Understanding Instantaneous Load and Charger Capacity Calculation in Substations
Jun , 07 2025
In modern substations, accurate power system design requires a clear understanding of instantaneous (transient) loads and how they impact equipment sizing, particularly for battery chargers in DC systems. This article breaks down the concept of transient loads, their implications, and how to properly calculate charger capacity under such conditions. 1. What Is an Instantaneous (Transient) Load? A ...
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An Overview of HV Substation Equipment — with Integration of High-Current DC Charging Systems
May , 24 2025
Each operating device in a high-voltage substation serves a vital role. Their shapes and sizes vary depending on their location and purpose, but together they ensure safe, stable, and efficient operation of the entire installation. 1. Switchgear: The Functional Core of a Substation Switchgear consists of various components like circuit breakers, disconnectors, earthing switches, and instrument tra...
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How electrolytic capacitor work for industrial battery charger
May , 16 2025
I. What is electrolytic capacitor: 1. Electrolytic capacitor, as the “energy storage heart” of charger power module, bears the key tasks of filtering, voltage stabilization and transient response. Its large-capacity characteristics (up to tens of thousands of μF) can effectively absorb the pulsating current after rectification, reduce output ripple, and ensure that the charging process is stable a...
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Provide the reliable solutions for critical equipments
Apr , 25 2025
Outdoor cabinets are unsung heroes in the telecommunications industry, silently protecting critical equipment from adverse weather conditions and ensuring uninterrupted service. From placing sensitive electronic devices in remote cellular base stations to protecting network infrastructure in harsh outdoor environments, these cabinets play a crucial role in maintaining the integrity and reliability...
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How to Extend UPS Battery Lifespan: 3 Essential Maintenance Tips
Apr , 19 2025
Can we change the UPS backup battery at home? Batteries are crucial for the integrity of UPS systems. Most modern UPS systems regularly perform and monitor battery short circuit tests, but maintaining these systems to ensure they operate correctly when needed is also crucial. Three tips for extending the lifespan of UPS backup batteries Replacing the internal battery is not a big deal, we can easi...
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What Is UPS Input Power Factor and Why It Matters
Apr , 12 2025
Power factor (pf) is the difference between the actual energy consumed in an AC circuit and the apparent power. It will be calculated as a decimal or percentage between 0-1 pf and 0-100%, i.e. 0.9 pF=90%. Meaning of UPS power factor UPS input power factor UPS input power factor is the ratio of UPS input active power to input power. UPS is not only a part of the power supply, but also the load of t...
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Radio Frequency Interference Filters (RFI)
Apr , 03 2025
Chapter 1: Application Scenarios of RFI Filters in Industrial Chargers RFI Filter is a key component for solving high-frequency electromagnetic interference (EMI), which is especially indispensable in high power and high frequency equipment such as industrial chargers. Industrial chargers are often faced with complex electromagnetic environments: fast switching of switching power supplies, high-cu...
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Difference between transformer insulation class and insulation strength
Mar , 29 2025
Insulation level refers to the motor (or transformer) winding insulation material used in the heat resistance level. Motor and transformer insulation materials commonly used in the grade for A, E, B, F, H five. Each insulation level of insulation materials have corresponding limit allowable working temperature (motor or transformer winding the hottest point of temperature). Motor or transformer op...
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