The demand for reliable and efficient power distribution is reaching new heights, and scalable modular solutions are withstanding real-world thermal and operational stress.
The rapid expansion of data centers, the rise of AI infrastructure, and the ongoing industrial growth are placing immense pressure on electrical grids and systems to expand and deliver consistent, high-performance energy distribution. But not all facilities have sufficient white space, specifications, and capacity to respond to the surge in demand in time.
Given the evolving landscape, we recently conducted a heat cycling test on the Vertiv™ PowerBar Track, a UL/IEC-certified high-Amperage (A) open track busway/busbar system (patent pending), available up to 2000A for the American market (UL) and up to 2500A for global markets (IEC). This open track busbar features high-density, high-conductivity copper and aluminum conductors and tap-off boxes with mechanical and electrical interlocks utilizing the “earth-first, break-last” safety feature. With this test, we can verify durability and temperature/stress-related defects simulated in real-world operational conditions.
What is heat cycling?
High-performance computing (HPC) workloads, such as artificial intelligence (AI) and machine learning services, experience peak demands. Systems at component and equipment levels undergo drastic fluctuations in power and cooling needed to support crucial processing. Temperature fluctuations are inevitable in environments such as data centers and critical digital infrastructure. Over time, these cycles can affect overall electrical performance, connection integrity, and safety. Heat cycling replicates these real-world thermal stresses to validate long-term operational system resilience.
More than a technical benchmark, this test demonstrated continuous engineering commitment to building safer, more resilient, and more efficient systems where every connection counts. From a business perspective, operators can maximize their invested equipment and reallocate their respective resources where needed.
Validating thermal integrity and uptime
The primary goal of this test was to validate the thermal performance and operational reliability of tap-off units when integrated with the busway system. In high-density applications where uptime is essential and failure is not an option, systems must maintain electrical and mechanical stability ─ even under repeated heating and cooling cycles. Considering the potential rapid and varying thermal stresses that can affect components’ expected lifespans in data centers, a thermal cycling test such as this confirms the safety and long-term performance of the busway/busbar system.
Behind the scenes: How the test works
To measure performance under thermal stress, thermocouples were installed at key points across the Vertiv™ PowerBar Track, specifically inside the tap-off boxes and on specific points of the protection devices installed within. These sensors tracked temperature buildup during repeated heating and cooling cycles.
Additionally, electrical resistance was measured before and after testing to assess the stability of the system’s electrical joints, which is an important factor for long-term performance and safety.
What we found
The results were successful, showed strong and consistent performance throughout testing:
- Stable thermal performance: The system maintained a low and consistent temperature rise, staying well within acceptable levels.
- Minimal change across cycles: Temperature readings changed by only about 5°C across multiple cycles, showing strong thermal consistency.
- Solid electrical connections: Resistance measurements before and after testing showed minimal variation, confirming excellent mechanical and electrical stability.
- Torque matters: We also tested how different torque levels on the joints affected performance. While correct torque clearly improved results, the system still met standards even under lower torque, showing its built-in resilience.
Similarly, no protection device failures were observed during and after the test. This is implicit in nature: The test would not have been completed if any of the protection devices failed during the test run.
Takeaway
The Vertiv™ PowerBar Track gives data center operators the flexibility to adapt and grow. With changing power demands, data centers need power distribution systems that can adapt to shifting requirements tailored to HPC-driven environments. Its modular, hot-swappable overhead design supports space optimization, energy efficiency, fast installation, cost savings, and easy scalability without the downtime commonly associated with deployment and maintenance.
Further developments, new ratings, and expansions of the PowerBar Track will be released after testing. This innovative, vendor-agnostic open track busbar can easily be relied on as a key component of scalable power distribution, regardless of the facility’s size.
Keep your operations running without delays, supported by our wide global manufacturing network and efficient inter-regional product transfers. The Vertiv streamlined approach accelerates deployment, minimizing delays and supporting smooth operations.
Want to know more about the Vertiv™ PowerBar Track or other power solutions for your facility? Contact our team today.
