Handheld Loop micro-Resistance Tester

The selection principles and precautions for fuse-switch disconnectors are crucial to ensuring the safe and stable operation of power systems.Selection Principles for Fuse-Switch Disconnectors Rated Voltage:The rated voltage of the fuse-switch disconnector shall be equal to or greater than the rated voltage of the electrical system to ensure the equipment operates normally without damage. Rated Current:The selection of rated current should be based on the load conditions of the electrical system

Substations designed for voltage levels ranging from 55 kV to 765 kV are known as outdoor substations. This type of substation requires less construction time but occupies more space. Outdoor substations are mainly divided into pole-mounted substations and foundation-mounted substations.Pole-Mounted SubstationsThis type of substation is used to support distribution transformers with capacities up to 250 kVA. Such transformers represent the cheapest, simplest, and smallest form of distribution. A

AC load banks are electrical devices used to simulate real-world loads and are widely applied in power systems, communication systems, automation control systems, and other fields. To ensure personal and equipment safety during use, the following safety precautions and guidelines must be observed:Select an appropriate AC load bank: Choose an AC load bank that meets actual requirements, ensuring its capacity, voltage rating, and other parameters satisfy the intended application. Additionally, sel

Installation precautions for Type K thermocouples are critical to ensuring measurement accuracy and extending service life. Below is an introduction to the installation guidelines for Type K thermocouples, compiled from highly authoritative sources:1.Selection and Inspection Select the appropriate thermocouple type: Choose the right thermocouple based on the temperature range, medium properties, and required accuracy of the measurement environment. Type K thermocouples are suitable for temperatu

Stepper servo motors, as critical components in industrial automation, directly impact equipment performance through their stability and precision. However, in practical applications, motors may exhibit abnormalities due to parameter configuration, mechanical load, or environmental factors. This article provides systematic solutions for six typical issues, combined with real-world engineering cases, to help technicians quickly identify and resolve problems.1. Abnormal Motor Vibration and NoiseVi

A shielding enclosure is a metallic structure made of conductive or magnetic materials in various shapes, designed to confine electromagnetic energy within a defined space and suppress radiated interference. A typical shielding enclosure consists of a conductive fabric layered over foam plastic, with a silver-plated woven material bonded onto it to form a soft gasket that occupies most of the loose space. This type is primarily used for civilian applications and is suitable for foam gaskets in e

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,