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.

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Why 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.

15d

Emergency Lead Time as Fast as 15 Days

Strategic material reserve and priority review for critical transformer replacement projects.

-40

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.

24h

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