Dynamic testing at CPRI validates resilience of high-capacity transformers for renewable and utility-scale applications

GameChange BOS has successfully completed Dynamic Short Circuit Type Testing for its high-capacity, multi-winding transformers, confirming their ability to withstand severe grid disturbances and reinforcing the company’s role as a dependable supplier for critical power infrastructure projects worldwide.

The certification testing was conducted at the Central Power Research Institute (CPRI) in Bhopal, India, a recognized authority for independent power equipment validation. The destructive short-circuit tests are among the most demanding evaluations a transformer can undergo, simulating extreme electrical and mechanical stresses caused by grid faults. Successful completion signals manufacturing readiness and compliance with internationally accepted performance benchmarks.

At the center of the testing program was GameChange BOS’s 17.6 MVA, five-winding Inverter Duty Transformer (IDT). During the dynamic short-circuit sequence, the transformer endured nine consecutive asymmetrical shots at 100 percent of the specified current for 0.25 seconds each. These tests replicate the intense fault conditions that can occur during short circuits or network disturbances. Equipment that fails under such stress can suffer internal displacement, insulation damage, or catastrophic breakdown.

The transformer’s ability to complete the sequence without structural or electrical degradation confirms its mechanical robustness and insulation integrity under extreme conditions. For developers of renewable energy plants, battery energy storage systems (BESS), utilities, and data centers, this resilience is critical to ensuring operational stability and minimizing downtime.

The comprehensive evaluation adhered to International Electrotechnical Commission (IEC) standards. Routine measurements in accordance with IEC 60076-1 were performed before and after the short-circuit events to verify electrical performance consistency. Short-circuit tests followed IEC 60076-5 guidelines, using a three-phase supply on the high-voltage side with a preset short circuit on the low-voltage side.

Dielectric routine testing under IEC 60076-3 included Applied Voltage (AV) and Induced Voltage Withstand (IVW) tests, conducted both prior to and following the fault simulations to confirm insulation strength. Sound level measurements under no-load conditions were completed in line with IEC 60076-10 standards.

After testing, the transformer underwent full un-tanking to allow detailed visual inspection of internal active parts, as specified under IEC 60076-5 Clause 4.2.7.4-a. This physical assessment verified that windings, clamping structures, and core components remained intact and properly aligned despite the severe dynamic impacts.

The achievement comes at a time when transformer reliability is increasingly critical. As renewable generation expands and grid systems integrate inverter-based resources, transformers must manage rapid load variations, harmonics, and occasional high-fault currents. Robust design and certified performance are becoming non-negotiable requirements for large-scale projects.

GameChange BOS currently manufactures transformers up to 138 kV and 50 MVA, with plans underway to expand capabilities to 345 kV and 300 MVA. In addition to technical performance, the company emphasizes competitive delivery timelines—an important differentiator in a market where traditional transformer lead times remain extended due to global demand pressures and supply chain constraints.

Market response has been strong. The company has surpassed 190 medium-voltage transformer orders, reflecting sustained demand driven by renewable energy project pipelines, Safe Harbor qualification considerations, and customers seeking to reduce exposure to Foreign Entity of Concern (FEOC) supply chain risks. Reliable domestic manufacturing and internationally validated testing are increasingly influencing procurement decisions.

Phillip Vyhanek, CEO of GameChange BOS, described the certification as a significant milestone for the company’s transformer division. He emphasized that proving resilience under the harshest real-world grid scenarios provides customers with confidence in long-term asset performance and system reliability.

Operating as a wholly owned subsidiary of GameChange Energy Technologies Corp., GameChange BOS delivers Balance of Systems (BOS) solutions for renewable energy, BESS, utilities, commercial and industrial facilities, and data centers. The company’s engineering approach focuses on technical precision, rigorous quality control, and compliance with global standards to meet evolving infrastructure demands.

Key highlights of the certification include:

• Successful completion of Dynamic Short Circuit Type Testing at CPRI
• Validation of a 17.6 MVA, five-winding Inverter Duty Transformer
• Nine consecutive asymmetrical fault shots at full current sustained
• Full compliance with IEC electrical, dielectric, acoustic, and inspection standards
• Growing order pipeline exceeding 190 medium-voltage transformers

With this certification, GameChange BOS reinforces its commitment to delivering durable, grid-compliant transformer solutions capable of supporting the accelerating global energy transition and the modernization of critical power networks.