1. Company
1. Are you a factory or a trading company?
A manufacturer. Our plant is at No.261 Weishi 16th Road, Yueqing Economic Development Zone, Yueqing, Wenzhou, Zhejiang, China, Wenzhou, Zhejiang. Visits — in person or by video — are welcome.
2. What voltage range do you cover?
35 kV and below: 10 kV, 20 kV, 35 kV. We do not subcontract higher voltages.
3. What is the largest unit you build?
5–20,000 kVA per unit at 35 kV and below.
4. Do you have export references?
Units are in service in Europe, the Americas, Southeast Asia, the Middle East and Africa. Country-specific references can be provided on request.
2. Selection
5. Oil-immersed or dry-type?
Oil-immersed where a dedicated transformer room exists and cost or overload capability matters; dry-type for indoor, underground or fire-sensitive locations. The larger the rating, the stronger the cost advantage of oil.
6. Difference between S11, S13, S20 and S22?
Mainly loss level and price. S11 is the classic distribution build at lowest first cost; S13 has lower no-load loss and pays back on continuously energised units; S20/S22 meet higher efficiency classes for audits and tender scoring. Exact loss values are stated on the routine test report.
7. Is amorphous worth the premium?
Yes for long light-load duty such as PV, wind and night-heavy feeders. For units running near full load continuously, the advantage narrows.
8. Can you build to our drawing?
Yes: special voltage ratios, split windings, on-load tap changing, restricted dimensions, and environment-specific finishes (anti-corrosion, high altitude, mining).
9. Can we specify the transformer inside a substation?
Yes — oil-immersed or dry-type, selected against your single-line diagram and load profile.
3. Delivery
10. What is your fastest delivery?
7 days for standard ratings on expedited terms. Conditions: model on the stock list, drawing confirmed the same day, down payment received. Not applicable to custom builds.
11. Regular lead time?
15–30 days; 25–35 days for custom or export builds. Stated in the contract, never only verbally.
12. Annual capacity?
Over 6,000 units per year, calculated on standard distribution ratings — enough for OEM and trading partners running batch programmes.
13. Can you hold a production slot in peak season?
Peak season (Q4 and PV rush) fills quickly. Book the slot three to four weeks ahead; framework customers get priority.
4. Certification & export
14. Which certificates do you hold?
ISO 9001 (00126Q301352R301), ISO 14001 (39325E2567R0S), ISO 45001 (39325S2498R0S), CE Verification of Conformity (ICR/VC/HS251126) and CCC self-declarations for GCS, GGD, GGJ and JP units. Numbers and scope are listed on the About page.
15. Can you build to local voltage and frequency?
Yes — to IEC 60076 or your national standard, including 60 Hz, local ratios, English nameplate, neutral packing and seaworthy wooden cases.
16. Do you provide English documentation?
English datasheets, routine test reports, packing lists and operation manuals are standard for export orders.
5. Terms & service
17. Payment terms and warranty?
Typically down payment plus balance before shipment; terms are negotiable by order size and customer type. Warranty period and response time are written into the contract.
18. Who handles problems after delivery?
We do. Remote diagnosis first, on-site support where needed. Response times are contractual, not verbal promises.
Question not covered? Call +86 189 6972 3308 or email cnpengbian@126.com — reply within 24 hours on working days.
