With the continuous advancement of intelligence and informatization in power systems, power monitoring systems have become the core hub for grid dispatching, equipment control, and data acquisition. However, increased openness and interconnectivity have exposed these systems to increasingly severe security threats—such as cyberattacks, data breaches, and unauthorized access. A failure in security protection could lead to abnormal grid operations or even large-scale blackouts. Therefore, establis

Multifunction Power MeterA multifunction power meter is an intelligent instrument equipped with a digital processor, featuring programmable measurement, display, digital communication, and energy pulse transmission. It can perform electrical measurement, energy metering, data display, collection, and transmission. Some models also offer additional functions such as fault alarms, harmonic analysis, data statistics, and time logging.Multifunction power meters are widely used in substation automati

1 Electrical Instrument Faults and Maintenance1.1 Electricity Meter Faults and MaintenanceOver time, electricity meters may experience reduced accuracy due to component aging, wear, or environmental changes. This loss of precision can lead to inaccurate measurements, causing financial losses and disputes for both users and power supply companies. Additionally, external interference, electromagnetic interference, or internal faults can result in energy measurement errors, leading to incorrect bil

Analysis of Fault Types, Causes, and Handling Methods for Industrial RobotsI. IntroductionIndustrial robots play a crucial role in modern manufacturing, where their reliable operation directly affects production continuity and product quality. However, faults inevitably occur during long-term operation. Timely and accurate troubleshooting is essential to maintaining stable production. This article comprehensively discusses common fault types, root causes, and corresponding solutions for industri

1. Common Faults and Causes in Wind TurbinesAs a key component of wind-solar hybrid systems, wind turbines primarily experience faults in three areas: mechanical structure, electrical systems, and control functions. Blade wear and fracture are the most common mechanical failures, typically caused by long-term wind impact, material fatigue, or manufacturing defects. Field monitoring data show that the average blade lifespan is 3–5 years in coastal regions, but may shorten to 2–3 years in northwes

High-Voltage Vacuum Circuit Breakers: Importance and MaintenanceHigh-voltage vacuum circuit breakers are essential components in power transmission and distribution systems. Their reliability and stability are of critical importance to the safe and efficient operation of the entire power grid. However, even the highest-quality equipment requires proper maintenance to ensure optimal performance and maximum service life.What is a High-Voltage Vacuum Circuit Breaker?A high-voltage vacuum circuit br

Fault Analysis and Troubleshooting of High-Voltage Vacuum Circuit BreakersThe advantages of vacuum circuit breakers go beyond oil-free design. They also offer long electrical and mechanical life, high dielectric strength, strong consecutive breaking capacity, compact size, light weight, suitability for frequent operation, fire prevention, and low maintenance—benefits quickly recognized by power system operators, maintenance personnel, and engineers. Early domestically produced high-voltage vacuu

Does Your Plant Use ABB VD4 Breakers?Despite the VD4's proven reliability in global markets, no equipment is immune to faults with prolonged use. Below, we’ve compiled common VD4 faults and their solutions—hopefully this helps you in daily maintenance!Fault 1: Energy Storage Mechanism FailureSymptom:Motor cannot store energy, but manual storage works.Possible Causes & Solutions:1. Power Not ConnectedCheck if power is reaching the terminal block in the switchgear and confirm that the control

Common Vacuum Circuit Breaker Faults and On-Site Troubleshooting by Electrical EngineersAs vacuum circuit breakers are widely used in the power industry, performance varies significantly among manufacturers. Some models offer excellent performance, require minimal maintenance, and ensure high power supply reliability. Others suffer from frequent issues, while a few have severe defects that may cause over-level tripping and large-scale blackouts. Let’s explore real-world fault handling by electri

High-Voltage Circuit Breakers: Common Faults and Solutions for 35kV SystemsHigh-voltage circuit breakers are critical electrical equipment in power substations. A thorough understanding of their fault patterns and root causes enables targeted troubleshooting, rapid power restoration, and effective reduction of losses caused by outages and equipment damage.I. Common Operational Faults of 35kV High-Voltage Circuit Breakers1. Failure to Store Energy (Charging Failure)Energy storage is the foundatio