Technology Class

The withstand voltage test is crucial for testing high-voltage equipment, assessing its insulation performance and ability to withstand electric shock, ensuring its safety and reliability. It typically includes two types: AC and DC withstand voltage tests. These tests differ in principles and applications, which will be explained in more detail below.

The transformer comprehensive test bench is a professional equipment that integrates multiple test functions and is suitable for the performance evaluation of power transformers and distribution transformers. The equipment not only supports no-load and load characteristic tests, but also can perform double-frequency induction withstand voltage tests and power frequency withstand voltage tests. It is widely used in transformer manufacturing, installation and commissioning, and operation and maintenance.

CT disconnection refers to the occurrence of circuit disconnection in the secondary circuit of the current transformer (CT), which will make the secondary side unable to transmit current signals normally to the relay protection device or measuring instrument. The main function of the current transformer is to reduce the large current in the high-voltage line to a safe level in a certain proportion to facilitate the measurement and protection of the equipment to work.

The chromatographic analysis method for detecting dissolved gases in transformer oil is essential in discovering latent faults in oil-filled electrical equipment as early as possible. It can detect internal faults of equipment, predict the development trend of faults, and avoid equipment damage and unplanned power outages; according to the harmfulness of the fault, the importance of the equipment, and the load requirements, reasonable fault handling measures are formulated to ensure that the equipment is not damaged. This is an essential means of supervising and ensuring the safe operation of equipment.

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. Below is a detailed guide on the testing process and precautions to help on-site engineers conduct their work efficiently.

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.

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.