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JG Transformer is a leading manufacturer of dry-type and oil-immersed distribution & power transformers. With over 18 years of experience, ISO9001, CQC, CCC, IEC, and STL certified, we deliver reliable, energy-efficient electrical solutions to over 50 countries worldwide.
A trusted name in electrical transformation since 2005, delivering high-performance transformers with global certifications and advanced manufacturing.
In 2005, Dongying Jieguang Transformer Factory—commonly known as JG Transformers—was established in Shandong, China. Since then, we have grown into a full-fledged electrical technology enterprise, rebranded in 2016 as Shandong Jieguang Electrical Technology Co., Ltd.
JG Transformers specializes in the R&D, manufacturing, and export of dry-type and oil-immersed power and distribution transformers ranging from 6kV to 110kV. Our products are widely used in power grids, petrochemical industries, mining, infrastructure, and emergency power systems.
We have earned multiple national and international certifications including ISO9001, CQC, CCC, IEC, and STL—ensuring every transformer meets the highest standards of safety, efficiency, and durability.
High-efficiency, durable transformers engineered for industrial, commercial, and utility applications. All models meet international standards.
Energy-efficient oil-immersed distribution transformer with low loss and high reliability. Ideal for rural and urban power networks.
Advanced three-dimensional wound core design reduces no-load loss by up to 30%. Superior magnetic flux distribution.
High-voltage power transformer for substation and grid applications. Designed for long-term stability under heavy loads.
Flame-retardant, maintenance-free dry-type transformer ideal for indoor installations in commercial buildings and data centers.
Low-voltage distribution switchgear for safe and efficient power distribution in industrial and commercial facilities.
High-voltage metal-enclosed switchgear for primary distribution systems. Reliable arc protection and monitoring.
Integrated outdoor substation combining transformer, MV, and LV switchgear. Fast installation, space-saving design.
Trailer-mounted substation for emergency power, construction sites, and temporary grid support. Fully pre-assembled.
Advanced engineering, rigorous testing, and global compliance ensure unmatched reliability and performance.
Annual production capacity of 4,000 units across dry and oil-filled transformers (6kV–35kV), ensuring fast delivery and scalability.
Advanced design and manufacturing processes guarantee 100% pass rate in short-circuit withstand tests for maximum safety.
Eliminates micro-bubbles in oil, preventing partial discharge and acetylene formation—extending transformer life significantly.
100% fluorescent leakage testing ensures zero defects. Optional corrosion-resistant coating (up to 1000hr salt spray test).
Certified by ISO9001, CQC, CCC, IEC, and STL—trusted by State Grid, petrochemical firms, and international utilities.
Successfully delivered to Bangladesh, Sri Lanka, UAE, and over 50 countries. Experienced in international logistics and customs.
JG produces dry-type and oil-immersed power and distribution transformers from 6kV to 110kV, including S11, S13, SBH15, SCB10, and custom models.
Yes. Our products are certified under ISO9001, CQC, CCC, IEC, and STL standards, meeting requirements for export to Europe, Asia, Africa, and the Americas.
Absolutely. We offer OEM/ODM services and can design transformers to meet your exact technical specifications and environmental conditions.
Typical lead time is 4–8 weeks depending on model and order volume. We maintain raw material stock for faster production.
For inquiries, quotes, or technical support, visit our official website to contact the JG Transformer team.
+86 546 3692456
+86 18954672583
No.384, Chuan...
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