Technology Class

Cables are critical components of power transmission systems, and their health directly affects the safety and stable operation of the entire power grid. Cable failures lead to power supply interruptions and may cause safety accidents. Therefore, timely and accurate detection and location of cable faults are essential for maintaining and managing power systems. This article will explore several standard cable fault testing methods in-depth and analyze their working principles, the scope of application, and advantages and disadvantages.

Among the many maintenance methods, the DC resistance test is widely used in routine transformer inspection. As an effective detection method, the DC resistance test can help engineers find potential problems in time and ensure the reliability and safety of the equipment.

In the power system, cable failure will not only affect the continuity of the power supply but also may cause equipment damage and safety accidents. Therefore, power engineers need to master a complete set of emergency handling processes to quickly restore the power supply and ensure the safety of the system and personnel. The following is a detailed emergency handling process that aims to provide effective and practical guidance for power engineers.

As SF6 gas is not only an efficient insulating medium but also provides excellent arc-quenching properties, maintaining its purity is vital. Below are the methods and steps for efficiently testing SF6 purity in the field, along with practical details.

In the routine maintenance and inspection of power systems, testing current transformers (CT) and potential transformers (PT) is essential for ensuring the safe and stable operation of electrical equipment.

Optimizing the transformer oil chromatography testing process is essential for improving testing efficiency, enhancing result accuracy, and ensuring equipment safety. The following sections detail how to optimize this process from sampling operations, sample preservation, degassing methods, equipment maintenance and calibration, data analysis, to result validation.

Contact resistance testing is a vital method for ensuring the efficient and safe operation of transformers. By assessing the state of electrical connections, potential issues can be identified in a timely manner. This article will explore the key applications of contact resistance testing in the daily maintenance of transformers.

As the operational lifespan of equipment increases, aging phenomena become more pronounced, leading to performance degradation, increased failure rates, and the potential inability of conventional tests to fully uncover latent problems. This article will delve into the impact of power equipment aging on relay protection testing and propose corresponding countermeasures.

In power systems, cable faults significantly impact stability and safety. Understanding cable fault types and mastering detection methods are critical for ensuring reliable cable operations. Below is an overview of common cable fault types and detailed detection methods with key operational tips.

Although the series resonance test device has undergone strict quality inspection before leaving the factory, various faults may still be encountered during the test due to the complex and changeable on-site environment. The above content provides analysis and treatment suggestions for common faults to help testers solve problems more quickly and accurately.