Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

As an on-site maintenance technician, I frequently deal with electrical, mechanical, and insulation faults in load switches. The following outlines fault manifestations, causes, and solutions:I. Electrical Fault Handling(1) Contact HeatingContact heating is mainly caused by poor contact, insufficient pressure, or three-phase asynchrony. When the contact resistance exceeds 1.5 times the initial value, the temperature rise will exceed the standard in a 40℃ environment. For example, the FW4-10 swit

1. Fault OverviewIn June 2013, a fault occurred in a high - voltage switchgear in operation in a certain urban area, causing a 10kV line to trip. On - site investigation revealed that the faulty switchgear was a pneumatic ring - network high - voltage load switchgear (HXGN2 - 10 type), and the fault characteristic was athree - phase arc short circuit. After isolating the fault and restoring power supply to users, it should be noted that the same type of switchgear in this area, which was put int

As a frontline worker in power distribution operation and maintenance, I deal with load switches daily—they’re the “gatekeepers” of medium - voltage distribution systems, ensuring stable power supply for users. With rapid economic development, the demand for power system safety and reliability keeps rising. Medium - voltage distribution systems are crucial for grid stability, and load switches (as key line - mounted equipment) play a pivotal role. Their ma

As a frontline operator who deals with smart electricity meters daily, I’m well - versed in the design and operational norms of load switches (both internal and external) in these meters. Below, I’ll break down the technical requirements and practical key points based on my on - site experience for easy reference.I. Basic Understanding of Internal and External Load SwitchesIn the type specifications for single - phase and three - phase smart electricity meters (such as enviro

As a front - line technician in loop - network power supply and prefabricated substation operation and maintenance, I deeply understand equipment iteration driven by high - voltage urban expansion. Per theNational Power Supply and Consumption Regulations, for equipment over 250kW or 160kVA transmission capacity, 10(6)kV high - voltage power supply and 220/380V step - down form a necessary pattern, making loop - network units and prefabricated substations key in distribution networks.I. Equipment

With the increasing complexity of power system operation environment and the deepening of power system reform, traditional power grids are accelerating the transformation to smart grids. The goal of equipment condition-based maintenance is achieved through real-time perception of equipment status by new sensors, reliable communication via modern network technology, and effective monitoring by background expert systems.I. Analysis of Condition-based Maintenance StrategyCondition-based Maintenance

With the accelerated automation of power equipment, various medium-voltage switchgear have emerged in the market. Classified by insulation media, they are mainly divided into air-insulated, SF₆ gas-insulated and solid-insulated types, each with its own advantages and disadvantages: solid insulation offers good performance but poor environmental friendliness, SF₆ features excellent arc extinguishing capability but is a greenhouse gas, and air insulation has high cost-performance but larger volume

As an expert who has been deeply engaged in the field of power system design for many years, I have always paid attention to the technological evolution and application practice of medium-voltage ring main distribution equipment. As a core electrical device in the secondary distribution link of the power system, the design and performance of such equipment are directly related to the safe and stable operation of the power supply network. The following is a professional analysis of the key design

1. Statistics on Common Faults of Medium-Voltage Switchgear in the Early Operation StageAs project participants, we found during the early operation of a new metro line: 21 sets of power supply equipment were put into use, with a total of 266 accident phenomena in the first year. Among them, 77 faults occurred in medium-voltage switchgear, accounting for 28.9%—significantly higher than faults in other equipment. Statistical analysis shows that major fault types include: protection devi

Due to the long service life and severe aging of the equipment, the switches in the 6kV working section of Unit 6 of a certain power plant have potential safety hazards such as deformed locating pins, abnormal closing positions of the earthing switches, and malfunctions of the protection devices. These hazards have threatened the stable operation of the unit, making the transformation extremely urgent. Meanwhile, considering the recent cases of electric shock casualties involving medium-voltage