Sieyuan Electric Delivered 40.5 kV Medium-Voltage Switchgear for Atlas Estepa and Crucero Substations in Chile

Chile is located along the Pacific Ring of Fire and is subject to frequent seismic activity. As a result, local grid requirements place high demands on the seismic performance of power transmission and distribution equipment.

The Atlas Estepa and Crucero substations are key infrastructure projects supporting renewable power generation and electricity transmission in the region. The equipment was subject to rigorous project acceptance requirements, including compliance with applicable IEC standards and seismic requirements specified in Chile's NTSyCS requirements and the relevant technical annexes for power transmission facilities.

• Dual compliance requirements — The equipment had to comply with applicable IEC standards as well as Chile's NTSyCS requirements, placing stringent demands on cabinet structural strength, operational stability and seismic design.

• Rigorous project acceptance requirements — The end client required full-scale seismic test reports and conducted detailed reviews of test procedures, report formats and supporting documentation.

• Demanding operating conditions — The equipment must maintain structural integrity and reliable operation during seismic events, minimizing risks such as cabinet deformation and unintended switching operations.

• Third-party seismic verification — The switchgear underwent full-scale seismic testing on a shaking table, with formal seismic test reports issued to support compliance with NTSyCS requirements.

• Standardized product design and verification — The switchgear was designed and manufactured in accordance with the IEC 62271 series. Key requirements covering electrical performance, mechanical operation and enclosure protection were verified in accordance with applicable standards.

• Dedicated overseas project management — A project-specific delivery plan coordinated design, testing, documentation and factory acceptance to meet the project's technical requirements while achieving an EXW lead time of just four weeks.

• Seismic-resistant cabinet structure — The reinforced cabinet structure optimizes load distribution and enhances the cabinet's seismic performance.

• Simulation and physical test verification — The design was evaluated through simulation and validated through physical seismic testing.

• Project-specific compliance documentation — Seismic calculations, test reports and drawings were prepared in accordance with applicable Chilean grid requirements for client review.