I. Allowable TemperatureWhen a transformer is in operation, its windings and iron core generate copper loss and iron loss. These losses are converted into heat energy, causing the temperature of the transformer's iron core and windings to rise. If the temperature exceeds the allowable value for a long time, the insulation will gradually lose its mechanical elasticity and age.The temperature of each part of the transformer during operation is different: the winding temperature is the highest, fol

1. Definition of Condition-Based MaintenanceCondition-based maintenance refers to a maintenance method where decisions on whether and how to perform maintenance are determined based on the real-time operating status and health condition of equipment. It has no fixed maintenance methods or schedules. The prerequisite for condition-based maintenance is the establishment of equipment parameters and the comprehensive analysis of various operational information of the equipment, so as to make reasona

Traction Rectifier TransformersRated capacity: 800 to 4400 kVA; Voltage class: 10 kV and 35 kV; Rectifier pulse number: 12-pulse and 24-pulse. Compared with 12-pulse rectifier circuits, 24-pulse rectifier circuits can reduce the harmonic pollution of the power grid by 50%, and no filtering equipment is needed at this location. It is suitable for power supply systems of urban subways and rail transit.Excitation Rectifier TransformersRated capacity: 315 to 3000 × 3 kVA; Voltage class: 10 kV, 13.8

Operating Conditions in National Standard GB 6450-1986Ambient temperature: Maximum ambient temperature: +40°C Daily average maximum temperature: +30°C Annual average maximum temperature: +20°C Minimum temperature: -30°C (outdoor); -5°C (indoor) Horizontal axis: Product load; Vertical axis: Average coil temperature rise in Kelvin (note: not in Celsius).For Class H insulation products, the long-term temperature resistance of insulation materials is stipulated by the state as 180°C. However, the in

This report is based on the analysis of one-day power quality monitoring data of your company's distribution system. The data shows that there is significant three-phase current harmonic distortion in the system (with a high total harmonic distortion of current, THDi). In accordance with international standards (IEC/IEEE), harmonic currents at this level have posed substantial risks to the safe, reliable, and economical operation of the power supply transformer, mainly manifested in additional h

In electrical control systems, AC contactors are among the commonly used electrical components, and they are also a common source of various electrical faults. After long-term use—especially in harsh environments with high levels of dust—AC contactors may sometimes emit squeaking or rattling noises after being pulled in and held. The causes of this phenomenon are analyzed as follows.Squeaking Noise After Pull-In and HoldingA fully functional AC contactor makes no noise when energized and pulled

I.Background and Challenges​Southeast Asia is experiencing rapid economic growth, with an average annual increase in electricity demand exceeding 5%. However, the region’s unique environmental conditions pose significant challenges to power transmission:​High Temperature and Humidity: Average annual temperatures range from 28°C to 35°C, with humidity often exceeding 80%, accelerating cable insulation aging.​Salt Mist Corrosion: Coastal areas exhibit high salt content, leading to me

Abstract​This solution addresses common industry challenges such as physical damage, chemical corrosion, and electromagnetic interference faced by high-voltage cables in complex environments. The core of the solution is a novel single-core shielded thin-wall high-voltage cable. Through innovative double-layer XLPE protection, a composite shielding structure, and an optional optimized outer sheath design, it delivers exceptional mechanical protection, insulation performance, shielding effectiven

Application Scenarios​This solution is primarily designed for high-voltage power transmission needs in extreme climate regions such as deserts and polar areas. It is suitable for:Photovoltaic power stations in desert regionsPower supply systems for polar research stationsTransmission lines in plateau and desert regionsOther harsh environments with significant temperature variations and strong sandstorms​II. Core Technological Innovations​​Application of Specialized Materials​Silicone rubber ins

Technical Background and Demand Analysis​High-voltage cables (typically referring to cables transmitting 1kV–1000kV electrical power) serve as the core arteries of power systems and are widely used in critical scenarios such as urban power grids, power stations, industrial and mining enterprises, and cross-water power transmission. Traditional high-voltage cables exhibit several shortcomings during long-term operation:​Inadequate shielding performance: Susceptible to external electromagne

Application Scenarios​Urban power grid upgrades, power supply for large industrial parks, grid integration of renewable energy power stations, and other medium-to-short-distance, high-reliability power transmission scenarios.​Core Requirements​Excellent flame retardancy, compact structure for easy installation, strong corrosion resistance, and high mechanical stress resistance.​Solution​​Material Upgrade:Use flame-retardant cross-linked polyethylene (FL-XLPE) as insulation material. A composite

I. Solution Overview​With the rapid development of new energy vehicles toward higher voltage and greater intelligence, the performance requirements for internal high-voltage cables have become more stringent than ever. Traditional high-voltage cables commonly suffer from three major drawbacks: susceptibility to electromagnetic interference, poor stability of internal cores, and inadequate protection against water and physical compression. These issues severely impact the safety and reliability o