Article List
- Mechanical Vs. Electronic VLF Testers: A Buyer's Guide To Cable Insulation Testing EquipmentIn the past, DC withstand voltage tests were widely used for on-site insulation testing of cables and rotating electrical machines, valued for their compact size and low power requirements for capacitive test samples. However, over two decades of global field practice and industry research have showIndustry News October 29, 2026
- Non-Disconnecting Inductance Measurement: A Supplementary Diagnostic for Shunt Reactor ConditionShunt reactors are critical reactive‑power compensation assets for high‑voltage transmission networks. They stabilize system voltage, absorb excess capacitive reactive power from long lines, and maintain grid operating quality. However, hidden mechanical and electrical defects such as inter‑turn shoIndustry News October 21, 2026
- Transformer Fingerprint Testing: The Four-Stage SFRA Protocol for Asset Lifecycle ManagementTransformers are the most valuable and critical equipment assets within a power grid. An unplanned outage of a large power transformer can trigger a cascading power grid disruption, resulting in millions of dollars in direct and indirect economic losses.Traditional diagnostic systems relying on insuIndustry News October 15, 2026
- Low-Frequency Excitation CT/PT Testing: Why Variable-Frequency Analyzers Replace Conventional Discrete SetupsCurrent transformers and voltage transformers are core components for metering and protection in high-voltage systems of substations and transformer factories. Transformer performance testing is a mandatory item in commissioning tests, periodic preventative maintenance, and routine factory tests. TrIndustry News September 30, 2026
- A Practical Guide To Relay Protection Testers: Core Test Items for Substation MaintenanceRelay protection serves as the primary safety barrier for modern substations. When faults including short‑circuits, overloads and ground faults occur on transmission lines, transformers and busbars, protective relays must quickly detect abnormal conditions and issue trip commands to isolate faulty sIndustry News September 23, 2026
- How Precision BDV Testing Prevents Transformer Insulation FailuresWhen a Single BDV Number Lies The following sequence is an illustrative example based on common field patterns, not a specific incident report. A maintenance team pulls an oil sample from a 220 kV transformer. The **Chongqing Gold GDYJ‑505H 80 kV transformer oil BDV tester** runs six breakdowns. TheHot Product Promotion September 18, 2026
- Primary Vs. Secondary Injection Testing: Key Differences And Equipment Selection GuideEfficient and safe power testing is fundamental to the reliable operation of the power grid. Whether it's commissioning testing of newly built substations, routine maintenance, or troubleshooting, the accuracy and safety of test results largely depend on the selection of the right equipment. In theHot Product Promotion September 11, 2026
- How To Diagnose High-Voltage Circuit Breaker Mechanical And Contact Faults Without Dismantling: A Field GuideIntroductionHigh‑voltage circuit breakers are the last line of defense in modern power grids. When a fault occurs, they must interrupt massive short‑circuit currents within milliseconds—often after sitting idle for months. Failure is not an option, yet industry data shows that more than half of breaHot Product Promotion September 02, 2026
- VLF-60KV AC Hipot Tester for 20kV Power Cables ready for shipmentRecently we completed the production of VLF-60KV AC Hipot Tester and arranged the shipment to our customer.VLF-60KV is suitable for conduct AC withstand voltage test of power cables up to 20KV. The output frequency are 0.1Hz,0.05Hz,0.02Hz and 0.01Hz. LCD touch screen for easy operation.We have 30kV-Company News August 25, 2026
- Solving Field Challenges in DC Withstand Voltage Testing for Photovoltaic And Energy Storage ProjectsIn large-scale ground-mounted photovoltaic power plants and energy storage system projects, the quality of DC withstand voltage and leakage current testing directly affects grid connection nodes, equipment lifespan, and asset safety. However, field conditions often differ significantly from the ideaHot Product Promotion August 25, 2026