
At CNSOVIO, we are experts in the research, development, and manufacturing of high-voltage transmission and distribution equipment. For years, we focused on innovation and continuous improvement, integrating cutting-edge technology and rigorous quality testing. Our dedication ensures every product, from vacuum circuit breakers to switchgear and fuses, meets the highest global standards.

Provide free technical consulting to help clients select the most suitable product solutions
Offer product customization services based on special application requirements
Provide product operation and maintenance training services for clients
Respond to inquiries within 6 hours, provide solutions within 48 hours











A step-by-step import guide for MV switchgear and vacuum circuit breakers from China, covering specification, factory verification, FAT, packing and customs.

Type tests prove the design once; routine tests prove every unit. Compare test scope, read the reports correctly, and specify both in your purchase order.

IEC and IEEE rate the same MV switchgear differently. Compare voltage classes, insulation levels, fault durations and arc testing, and see where designs diverge.
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