GQ25 Series Metal Push Button Switch

I. CLAIMS A sealing structure for lead wires of contacts in an oil-filled SF6 gas density relay, characterized by comprising a relay housing (1) and a terminal base (2); the terminal base (2) comprising a terminal base housing (3), a terminal base seat (4), and conductive pins (5); the terminal base seat (4) being disposed inside the terminal base housing (3), the terminal base housing (3) being welded onto the surface of the relay housing (1); a central through-hole (6) being provided at the ce

Differences Between Rectifier Transformers and Power TransformersRectifier transformers and power transformers both belong to the transformer family, but they differ fundamentally in application and functional characteristics. The transformers commonly seen on utility poles are typically power transformers, while those supplying electrolytic cells or electroplating equipment in factories are usually rectifier transformers. Understanding their differences requires examining three aspects: working

SST High-Frequency Isolated Transformer Core Design and Calculation Material Characteristics Impact:Core material exhibits varying loss behavior under different temperatures, frequencies, and flux densities. These characteristics form the foundation of overall core loss and require precise understanding of nonlinear properties. Stray Magnetic Field Interference:High-frequency stray magnetic fields around windings can induce additional core losses. If not properly managed, these parasitic losses

I. Core Innovation: A Dual Revolution in Materials and StructureTwo key innovations:Material Innovation: Amorphous AlloyWhat it is: A metallic material formed by ultra-rapid solidification, featuring a disordered, non-crystalline atomic structure.Key Advantage: Extremely low core loss (no-load loss), which is 60%–80% lower than that of traditional silicon steel transformers.Why it matters: No-load loss occurs continuously, 24/7, throughout a transformer’s lifecycle. For transformers with low loa

1. Introduction SF6 electrical equipment, renowned for its excellent arc-quenching and insulating properties, has been widely applied in power systems. To ensure safe operation, real-time monitoring of SF6 gas density is essential. Currently, mechanical pointer-type density relays are commonly used, providing functions such as alarm, lockout, and on-site display. To enhance vibration resistance, most of these relays are filled internally with silicone oil.However, oil leakage from density relays

The use of power electronics in industry is increasing, ranging from small-scale applications such as chargers for batteries and LED drivers, to large-scale applications like photovoltaic (PV) systems and electric vehicles. Typically, a power system consists of three parts: power plants, transmission systems, and distribution systems. Traditionally, low-frequency transformers are used for two purposes: electrical isolation and voltage matching. However, 50-/60-Hz transformers are bulky and heavy

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,