I. Background and Challenges​Shore power systems have become core technical equipment for ports to reduce carbon emissions and noise pollution. However, these systems face two major challenges in the harsh operational environment of ports:​Severe Environmental Corrosion: High humidity and salt spray in port areas cause serious corrosion to metal components and enclosures of electrical equipment, significantly impacting electrical lifespan and operational reliability.​High Switching Requirements:

Issue Overview​The 10kV air compressor starting system of a company utilizes the ABB vacuum contactor KC2 as the control component for the operating circuit. The dedicated wide-voltage power supply module paired with this contactor presents the following issues:​Frequent failures: The power supply module fails to properly transition the voltage from 300V to 12V, resulting in fuse blowouts.​Poor heat dissipation: Enclosed installation of the module leads to insufficient heat dissipation, acceler

1.Project BackgroundA coal conveying system comprises 15 belt conveyors driven by medium-voltage motors. The system operates under complex conditions, with motors often subjected to heavy loads and frequent starts. To address these challenges and achieve effective control and reliable protection during motor startup, the project comprehensively adopts Vacuum Contactor-Fuse (VCF) combination devices for the 6kV medium-voltage motor power distribution. This solution details the technical features,

I.Project Background and Core Challenges​In modern industrial automation production lines—such as packaging, assembly, and sorting—the start-stop control of actuators (e.g., motors, cylinders) is extremely frequent. As one of the core control components, the performance of AC contactors directly affects the stability, efficiency, and reliability of the entire production system. Traditional contactors often face issues such as slow response, susceptibility to interference-induced malf

1.Design Background and Requirement Analysis​During power system operation, voltage sags—characterized by a sudden drop in RMS voltage to 10%–90% of the rated value lasting from 10 ms to 1 minute—often occur due to lightning strikes, short-circuit faults, or the starting of large equipment. Such events can cause traditional AC contactors to trip, resulting in unplanned shutdowns in continuous production processes and significant economic losses.Although several intelligent cont

I. Industry Application Challenges​In new energy applications such as photovoltaic (PV) power generation and wind power generation, AC contactors serve as critical control and protection components. Their operating environment differs significantly from traditional industrial scenarios, presenting two core challenges:​High Voltage and DC Component:The DC-side voltage of PV systems can reach 1,000V or even 1,500V, with fault currents being pure DC. Wind power systems also exhibit rich harmonics,