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

High-voltage switchgear is a critical electrical device in power systems. Deterioration in switchgear operating conditions is one of the main causes of power system failures. So, what are the common faults in high-voltage switchgear?I.Classification of High-Voltage Switchgear(1) Outdoor and Indoor TypesBased on installation location, high-voltage switchgear can be classified as outdoor or indoor types. Indoor switchgear is commonly used for systems at 10 kV and below. According to primary circui

The working principle of a power plant boiler is to utilize the thermal energy released from fuel combustion to heat feedwater, producing a sufficient quantity of superheated steam that meets specified parameters and quality requirements. The amount of steam produced is known as the boiler's evaporation capacity, typically measured in tons per hour (t/h). Steam parameters primarily refer to pressure and temperature, expressed in megapascals (MPa) and degrees Celsius (°C), respectively. Steam qua

Why Do Electrical Equipment Need a "Bath"?Due to atmospheric pollution, contaminants accumulate on insulating porcelain insulators and posts. During rain, this can lead to pollution flashover, which in severe cases may cause insulation breakdown, resulting in short circuits or grounding faults. Therefore, the insulating parts of substation equipment must be periodically washed with water to prevent flashover and avoid insulation degradation that could lead to equipment failure.Which Equipment Is

Function of Surge ArrestersWhen lightning-induced overvoltage travels along overhead power lines into a substation or other buildings, it can cause flashovers or even puncture the insulation of electrical equipment. Therefore, if a protective device—known as a surge arrester—is connected in parallel at the power inlet of the equipment (as shown in Figure 1), it will immediately activate when the overvoltage reaches the preset operating level.The arrester discharges the excess energy, limiting th

Composition and Working Principle of Photovoltaic (PV) Power Generation SystemsA photovoltaic (PV) power generation system is primarily composed of PV modules, a controller, an inverter, batteries, and other accessories (batteries are not required for grid-connected systems). Based on whether it relies on the public power grid, PV systems are divided into off-grid and grid-connected types. Off-grid systems operate independently without relying on the utility grid. They are equipped with energy-s

Routine Maintenance and Care of Dry-Type Power TransformersDue to their flame-resistant and self-extinguishing properties, high mechanical strength, and ability to withstand large short-circuit currents, dry-type transformers are easy to operate and maintain. However, under poor ventilation conditions, their heat dissipation performance is inferior to that of oil-immersed transformers. Therefore, the key focus in the operation and maintenance of dry-type transformers is controlling the temperatu

Normal operating sound of a transformer. Although a transformer is static equipment, a slight, continuous "humming" sound can be heard during operation. This sound is an inherent characteristic of operating electrical equipment, commonly known as "noise." A uniform and continuous sound is considered normal; an uneven or intermittent noise is abnormal. Tools such as a stethoscope rod can assist in determining whether the transformer's sound is normal. The causes of this noise are as follows: Vibr

Heavy-duty industrial robots refer to robotic arms or automated equipment with a load capacity exceeding a certain standard, typically capable of handling materials over 500 kg. These robots feature high stability, precision, and strong interference resistance, and are widely used in fields requiring large-scale, high-intensity operations. By flexibly adjusting programs to adapt to different production needs, these robots help enterprises improve efficiency while reducing labor costs and safety

I. The Importance of Robot Hardware SelectionRobots are now playing an increasingly important role in various fields, from industrial production to the service industry, from scientific research to daily life. To enable robots to operate efficiently and stably, hardware selection and configuration is the key first step. Appropriate hardware can ensure that robots accurately perform tasks, improve work efficiency, and reduce the probability of failures. For example, in industrial manufacturing, a

The Rise and Future of Intelligent Inspection RobotsI. The Rise of Intelligent Inspection RobotsIn today’s rapidly advancing technological era, intelligent inspection robots are emerging as shining stars across various industries, revolutionizing traditional inspection practices.Imagine the past: in large factories, inspectors had to walk long distances along complex production lines, manually checking equipment conditions. This was not only time-consuming and labor-intensive but also posed safe