Application scenario
Designed for Critical Power Infrastructure
Whether used in EPC projects or grid upgrades, our transformers deliver reliability, high efficiency, and compliance with international standards.
Power Equipment Factory
Understand your voltage class, installation site, load type, and technical standards.
Engineering & Customization
Offer design drawings, configuration suggestions, and tailored models based on your project.
Manufacturing & Quality Control
Factory production with 100% testing (impulse, insulation, heat run, etc.) per GB/IEC standards.
Packaging & Delivery
Export-grade packaging, shock-resistant protection, global shipping support.
On-Site Guidance / Remote Support
Support for installation, commissioning, and troubleshooting.
After-Sales Service & Warranty
Up to 24 months warranty, spare parts supply, fast technical response.
On-Site Construction in Action
Professional Construction at Work
Our construction sites reflect the strength of our professional teams, advanced equipment, and strict project management. Every detail is executed with precision and safety in mind, ensuring high-quality results that meet international standards. These on-site photos demonstrate not only our technical capabilities, but also our commitment to delivering reliable and efficient solutions for every project.
Technical Support by Engineers, Not Just Sales
We know that engineering-grade power equipment requires professional communication. Our technical team supports you with:
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Customized single-line diagrams and wiring schematics
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Compliance matching (GB/IEC/UL/CE standards)
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Load calculation and transformer sizing suggestions
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Remote troubleshooting and video guidance
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Support for third-party inspection or FAT before shipment
Warranty & Long-Term Support
All our products come with a standard 24-month warranty from the date of shipment. We offer:
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Timely replacement of faulty components (if caused by manufacturing issue)
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Extended warranty upon request
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Spare parts support
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Remote diagnostics and video call assistance
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Local partner network or engineer dispatch (for bulk orders / special contracts)
Get a Quote Now
Send Us Your Needs — We’ll Get Back in 24h
Whether you're upgrading an existing line or starting a new project, STON will customize a CNC solution for your production.