Company Profile
30+ Years Expertise | Full Compliance with US ANSI/IEEE & DOE Efficiency Standards
About ZBB
China ZBB Group Shanghai Transformer
ZBB GROUP has been designing and manufacturing power transformers, dry-type transformers, switchgear, and unit substations since 1985.
Our 36,000 m² facility is equipped with 300+ production and testing systems, with an annual capacity of 13.78M kVA and 30+ years of manufacturing experience.
We are a transformer manufacturer with in-house engineering, a full testing lab, and built to ANSI/IEEE, DOE efficiency, and UL/CSA standards.
View ProductsWhy Choose Us
Reasons to partner with ZBB for U.S. and global transformer projects.
U.S. Standards Compliant
ANSI/IEEE C57.12 series, DOE efficiency, and UL/CSA support available for project requirements.
Emergency Lead Time as Fast as 15 Days
Strategic material reserve and priority review for critical transformer replacement projects.
Harsh Environment Verified
-40 C to +55 C operation, corrosion resistance testing, and long-term project experience.
100% Factory Tested
Temperature rise, hi-pot, no-load and load loss, short-circuit impedance, and complete test reports.
Clear Warranty
Warranty terms are confirmed clearly according to product type, project scope, and commercial agreement.
Fast Response
Technical staff prioritize inquiry review, specification confirmation, and quotation support.
What We Do
Product capacity and voltage ranges prepared for transformer project selection.
| Product | Capacity | Voltage |
|---|---|---|
| Pad-Mounted Transformers | 75 - 5,000 kVA | 34.5kV class |
| Dry-Type Transformers | 30 - 5,000 kVA | 35kV class |
| Substation Transformers | 5,000 - 20,000 kVA | 69kV class |
| Unit Substation Transformers | 112.5 - 5,000 kVA | 15kV class |
| Overhead Distribution Transformers | 25 - 500 kVA | 34.5kV class |
| Step-Up / Step-Down Transformers | Custom | Custom |
Certifications & Compliance
Standards and compliance references commonly required by international transformer buyers.
| Standard | Status |
|---|---|
| ANSI / IEEE C57.12 Series | Compliant |
| DOE 10 CFR Part 431 | Compliant |
| UL / CSA | Available upon request |
| NFPA 70 | Applicable |
| ISO 9001 / 14001 / 45001 | Certified |
| Third-party lab testing (BV / DNV / ABS) | Available |
Fast Facts
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Need a transformer for your U.S. project?
Send your drawing or spec sheet. Our engineering and sales team will help confirm product selection, technical requirements, and quotation details.
Request a QuoteWorkshop
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Casting
Curing
Winding
Curing Furnace
Winding Machine
Casting Equipment
Foil Winding Machine
Vacuum Oil-filter
Inspecting
Testing Center
ZBB Transformer Production workshop
ZBB Transformers Production workshop