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

Recently, a Chinese manufacturer of bypass triggering devices, in collaboration with numerous enterprises, successfully developed the world’s first 550 kV bypass triggering gap for explosion prevention in ultra-high-voltage (UHV) converter transformers. The device has now passed the long-duration current-carrying pressure withstand test, completing all required validation tests. This milestone marks the successful development of a sub-millisecond ultra-high-speed bypass protection device based o

High-voltage disconnectors are widely used in China’s power systems due to their convenient operation and strong practicality. However, during long-term operation, serious faults such as insulator fracture and failure to open/close still occur, significantly impacting the normal operation of power systems [1]. Based on this, this paper analyzes common faults of high-voltage disconnectors during operation and proposes corresponding solutions based on actual working conditions to improve managemen

•The development is rooted in the long-term strategicpartnership ABB established in 2022 with Samotics, the leading provider of condition monitoring technology based on Electrical Signature Analysis (ESA).• Global launch at ADIPEC 2025 marks a new era in digital powertrain monitoring, enabling legacy drives to be upgraded to unlock advanced analytics — quickly, seamlessly and cost-effectively.• Integrating ESA technology in high power drives turns modernization into a digital transformation cata

The disconnector is the most widely used type of high-voltage switching equipment. In power systems, high-voltage disconnectors are high-voltage electrical devices used in coordination with high-voltage circuit breakers to perform switching operations. They play a critical role during normal power system operation, switching operations, and substation maintenance. Due to their frequent operation and high reliability requirements, disconnectors significantly impact the design, construction, and s

Common Faults of High-Voltage Circuit Breakers and Mechanism Pressure LossCommon faults of high-voltage circuit breakers themselves include: failure to close, failure to trip, false closing, false tripping, three-phase asynchronism (contacts not closing or opening simultaneously), damage to the operating mechanism or pressure drop, oil spraying or explosion due to insufficient interrupting capacity, and phase-selective circuit breakers failing to operate according to the commanded phase."Circuit

ABB adds Ethernet-APL connectivity to electromagnetic flowmeters for hazardous areasProcessMaster, ABB’s next-generation electromagnetic flowmeter, now enables high-speed field data transmission in hazardous environments.Sensors with Ethernet-APL support combine precise measurement with fast, secure data access, bringing significant changes to the chemical, oil and gas, power, and water industries.ABB’s continuously expanding portfolio of instruments with Ethernet-APL connectivity opens new poss

Recently, the world’s first 550 kV perfluoroisobutyronitrile (C4F7N)-based eco-friendly gas-insulated transmission line, developed by a Chinese manufacturer specializing in environmentally friendly gas-insulated power transmission equipment, was officially commissioned at the 500 kV Rongsheng Substation in Anqing, Anhui Province. This milestone marks another major breakthrough for China in the field of eco-friendly power equipment.For decades, sulfur hexafluoride (SF₆) has been widely used in th

Can dual-ended grounding be measured?Dual-ended grounding can be measured, but traditional high-voltage circuit breaker motion characteristic testers cannot perform such measurements. The conditions for dual-ended grounding are relatively complex; measurement accuracy must be ensured while simultaneously dealing with numerous electromagnetic interferences such as impedance and high-frequency currents. Therefore, a high-voltage circuit breaker tester specifically designed for dual-ended grounding

High-voltage switchgear refers to electrical equipment operating within a voltage range of 3.6 kV to 550 kV, used in power generation, transmission, distribution, energy conversion, and consumption systems for switching, control, or protection purposes. It primarily includes high-voltage circuit breakers, high-voltage disconnectors and earthing switches, high-voltage load switches, high-voltage auto-reclosers and sectionalizers, high-voltage operating mechanisms, high-voltage explosion-proof swi

I. IntroductionSubstations serve as critical hubs in power systems, responsible for transmitting electrical energy from power plants to end users. Busbars, as a key component of substations, play an essential role in power distribution and transmission. However, busbar voltage loss incidents occur from time to time, posing a serious threat to the safe and stable operation of power systems. Therefore, ensuring zero busbar voltage loss in substations has become a crucial issue in power system oper