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

Advancing Power Equipment Diagnostics: The Role of X-ray Digital ImagingWith continuous advancements in power grid equipment research and manufacturing, an increasing number of new devices are being integrated into power systems. As a result, effective monitoring of in-service equipment has become critically important for ensuring grid reliability and safety.The introduction and successful application of X-ray digital imaging technologies—specifically Computed Radiography (CR) and Digital Radiog

When vacuum interrupters are manufactured or used in the field, there are three tests used to validate their functionality: 1. Contact Resistance Test; 2. High Potential Withstand Test; 3. Leak-rate Test.Contact Resistance Test During the contact resistance test, a micro-ohmmeter is applied to the closed contacts of the vacuum interrupter (VI), and the resistance is measured and recorded. The result is then compared against the design specifications and/or the average values for other vacuum in

Circuit Breaker Operation TestClose Operation Test – Local/RemoteThis test is conducted manually, locally, and remotely. In the manual operation test, the spring is charged manually, and the breaker is closed and opened manually as well. For local operation, control power and AC supply are provided to the spring charging motor, and the circuit breaker is closed using the TNC switch. The function of the closing coil and the operation of the spring charging motor are observed. If remote

Vacuum Condition Monitoring in Vacuum InterruptersVacuum interrupters (VIs) serve as the primary circuit interruption medium for medium voltage power systems and are increasingly utilized in low, medium, and high-voltage systems. The performance of VIs hinges on maintaining an internal pressure below 10 hPa (where 1 hPa equals 100 Pa or 0.75 torr). Prior to leaving the factory, VIs are tested to ensure their internal pressure is ≤10^-3 hPa.The performance of a VI correlates with its vacuu