Testing the backbone of the grid
High-voltage component testing becomes central to grid reliability and climate goals.
Image for illustrative purposes
As the global energy transition accelerates, the reliability of electricity grids depends more than ever on the smallest components, from cable joints to transformers. Faults in these hidden elements can disrupt entire regions, making rigorous testing a crucial part of grid resilience and safety.
Cable joints, for example, are among the most sensitive points in the system. A single failure on a long transmission line can cause wide-area outages. Experience shows that inadequately tested joints and transformers remain a common cause of disruptions.
To address this, specialised high-voltage test systems are being developed to replicate real-world stresses under controlled conditions. One example is Trench’s Test Plus department in Bamberg, Germany, which designs customised test systems for high-voltage components used worldwide. These systems allow manufacturers to expose components to extreme voltages – in some cases up to 1.2 million volts – and ensure they meet demanding safety requirements.
Modern testing also reflects environmental priorities, with clean-air technologies and alternative gases replacing climate-damaging SF₆. This shift not only supports stricter climate goals but also ensures that testing methods remain aligned with sustainable grid development.
Customised testing solutions are increasingly being deployed worldwide, from Europe to the Americas and Asia. These systems are designed with long service lives and modularity in mind, ensuring adaptability to future requirements.
In short, testing has become a cornerstone of the energy transition: ensuring that transformers, switchgear, and joints can withstand rising demand, decentralised generation, and the growing complexity of international grids. Without such rigorous assurance, a secure, sustainable power system is simply not possible.
Source: Trench