About QDTB® Transformer
23 years of excellence in power equipment manufacturing
QDTB® is a registered trademark of Shandong Yaqing Electrical Co., Ltd. Founded in 2001, the company has grown into one of China's leading manufacturers of power transmission and distribution equipment. Our 100,000m² facility in Qingdao Jimo District houses state-of-the-art production lines and testing equipment. The QDTB® brand represents our commitment to quality, innovation, and reliability in transformer manufacturing.
Company History
Company Founded
Established in Qingdao, Shandong Province
First Export Order
Began international operations in Southeast Asia
ISO Certification
Achieved ISO 9001 quality management certification
New Facility
Moved to 100,000m² modern manufacturing campus
30 Patents
Reached milestone of 30+ patents and 25 software copyrights
Global Expansion
Products now serving clients in 30+ countries
Core Capabilities
Manufacturing
Advanced CNC machining, automated winding, vacuum drying, and precision assembly lines.
Testing
Full in-house testing laboratory with high-voltage test systems, temperature rise test, and impulse test.
R&D
Dedicated R&D center with 50+ engineers focusing on energy-efficient and smart grid solutions.
Quality
Three-coordinate measuring machines, spectral analyzers, and comprehensive QC processes.
QDTB® Group Companies
A comprehensive power equipment industrial cluster
QDTB® is a registered trademark of Shandong Yaqing Electric Power Technology Co., Ltd. The QDTB® Group consists of the parent company and several wholly-owned subsidiaries, covering the entire industrial chain from R&D, design, manufacturing to sales and service.
Shandong Yaqing Electric Power Technology Co., Ltd.
Core parent company, QDTB® brand owner
Qingdao Tebian Power Equipment Co., Ltd.
Sales, foreign trade & import/export
Qingdao Lanyu Transformer Co., Ltd.
OEM manufacturing & processing
Shandong Nengjia Electric Power Design Co., Ltd.
Power engineering design services
Qingdao AIJIA Electronic Co., Ltd.
Insulation materials & electronic components
Caltex (Shandong) Electric Technology Co., Ltd.
Overseas projects & international trade
Why Choose QDTB
23 years of power equipment manufacturing excellence. QDTB is your trusted transformer and substation supplier.
Direct Manufacturer
100,000m² facility with 500+ employees. Full process control from raw materials to finished products, eliminating middlemen for competitive pricing and consistent quality.
Full Certifications
ISO 9001 certified, CE marked. Products comply with IEC 60076/IEC 61330/IEC 62271 international standards. Exported to 30+ countries without barriers.
Complete Product Range
10 categories covering transformers, prefabricated substations, switchgear with 6,000+ models. One-stop solution for all power distribution needs.
Customization Capability
Professional engineering team for OEM/ODM services. From capacity configuration to enclosure design, fully tailored to project requirements.
Global Delivery Experience
Exports to 30+ countries. Familiar with IEC/IEEE/GB standards. Multi-language technical documentation and international logistics support.
Full Lifecycle Service
End-to-end support from technical consultation, solution design, manufacturing, installation guidance to after-sales maintenance.