In the 1# transformer renovation project at Erjiegou Substation, a 66kV power transformer was installed on site. Before installation, all transformer bushings were subjected to dielectric loss testing (tan delta test) and capacitance measurement to ensure that their insulation performance…
In preventive maintenance of power systems, the circuit resistance tester is an essential instrument. It is widely used for measuring contact resistance of high-voltage circuit breakers, as well as evaluating the connection quality of switches and busbar joints. With years…
A partial discharge detector is a critical tool used to evaluate the insulation condition of high-voltage electrical equipment. It is widely applied in transformers, cables, GIS, bushings, and rotating machines. By detecting partial discharge signals inside insulation, potential defects can…
Electrical insulation is one of the most critical electrical properties in high-voltage equipment such as transformers, cables, bushings, generators, and GIS systems. Over time, insulation materials deteriorate due to heat, moisture, contamination, and aging. A dielectric loss tester, also known…
Baoding, China-QILIDA, a specialized manufacturer of high-voltage testing equipment, has announced the successful completion of a critical lightning impulse voltage test on a 35kV coupling capacitor at Electric Power University. The test, conducted using the company’s flagship QLDCJ-400 Lightning Impulse…
Project Background: Strict Acceptance Standards for New Overseas Substations The Zhenshi Indonesia Project is a newly constructed 220kV substation located in a tropical marine climate zone, imposing high demands on equipment reliability and installation quality. As the core of the…
In high-voltage equipment manufacturing, factory withstand voltage testing is a critical step to verify insulation strength and ensure product reliability before delivery. Recently, a professional wall bushing manufacturer in Beijing introduced the YDQ Gas-Insulated Power Frequency Test Transformer developed by…
In power equipment maintenance and fault handling, transformer ratio testing is a critical procedure to verify correct winding connections and ensure electrical performance meets design requirements after component replacement. Recently, Datang Sanmenxia Power Plant conducted a comprehensive acceptance test after…
In the long-term operation and maintenance of offshore wind power equipment, insulation resistance testing is a key means of assessing the insulation condition of electrical equipment and preventing latent faults. Recently, during the outage maintenance of a transformer at the…
As power grid voltage levels continue to increase, insulation systems in high-voltage bushings are facing higher performance requirements. One of the most critical methods for evaluating insulation quality is partial discharge testing. For manufacturers of high-voltage bushings, implementing a reliable…