Do you support 60Hz frequency?

Yes. Our transformers are designed for both 50Hz and 60Hz operation. Please confirm your local grid frequency when placing an order

What is the difference between Dyn11 and Yyn0 connection group?

Dyn11 is the most common and recommended option. It provides better harmonic suppression and handles unbalanced loads more effectively. Yyn0 is less common but available upon request. We default to Dyn11 unless specified.

Do you provide 100% copper windings?

Yes. All our standard transformers use 100% copper windings. Aluminum windings are not recommended due to higher loss and shorter service life, but we can quote upon request.

MOQ is 1 set. We welcome small trial orders.

Technical Resources — Datasheets, Guides & FAQ

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Name	Size	Update	Copy Link	Download
Echic_ZW32_Outdoor_Vacuum_Circuit_Breaker_Selection_Guide_2026.pdf.pdf	261KB	2026-06-17	Copy Link https://www.echic-power.com/phoenix/admin/download?fileId=nvUprQEjGfMn&dp=GvUApKfKKUAU	Download
Echic_ZW32_Outdoor_VCB_Dimensions.dwg	2.15MB	2026-06-17	Copy Link https://www.echic-power.com/phoenix/admin/download?fileId=hLUKMQZObpqy&dp=GvUApKfKKUAU	Download
Echic_VS1_Vacuum_Circuit_Breaker_Selection_Guide_2026.pdf.pdf	249KB	2026-06-17	Copy Link https://www.echic-power.com/phoenix/admin/download?fileId=iNUArlEZQfpy&dp=GvUApKfKKUAU	Download
VS1-12_Vacuum_Circuit_Breaker_Dimension_Drawing.dwg	183KB	2026-06-17	Copy Link https://www.echic-power.com/phoenix/admin/download?fileId=ANUfhlZOaeTS&dp=GvUApKfKKUAU	Download

FAQ

Q Do you support 60Hz frequency?

A Yes. Our transformers are designed for both 50Hz and 60Hz operation. Please confirm your local grid frequency when placing an order
Q What is the difference between Dyn11 and Yyn0 connection group?

A Dyn11 is the most common and recommended option. It provides better harmonic suppression and handles unbalanced loads more effectively. Yyn0 is less common but available upon request. We default to Dyn11 unless specified.
Q Do you provide 100% copper windings?

A Yes. All our standard transformers use 100% copper windings. Aluminum windings are not recommended due to higher loss and shorter service life, but we can quote upon request.
Q What is your MOQ?

A MOQ is 1 set. We welcome small trial orders.

Professional manufacturer dedicated to R&D, production, and export of high-voltage power equipment since 2010.

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Technical Resources — Datasheets, Guides & FAQ

Download

FAQ

Q Do you support 60Hz frequency?

Q What is the difference between Dyn11 and Yyn0 connection group?

Q Do you provide 100% copper windings?

Q What is your MOQ?

PRODUCTS

QUICK LINKS

JOIN GLOBAL INSIGHTS