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Premium Power Transformers from China

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.

ISO9001 Certified
IEC & STL Compliant
4000 Units/Year Capacity
Transformer Factory
2005
Founded in Dongying, China

About JG Transformer

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.

ISO9001:2007
CQC Certified
IEC Compliant
Factory Interior Transformer Testing Quality Inspection Team Meeting

Our Transformer Series

High-efficiency, durable transformers engineered for industrial, commercial, and utility applications. All models meet international standards.

S13-M Oil Transformer

S13-M Oil Transformer

Energy-efficient oil-immersed distribution transformer with low loss and high reliability. Ideal for rural and urban power networks.

  • 10kV Class
  • 30-1600kVA Capacity
  • Full Vacuum Greasing
S13-M-RL Three-Dimension Iron Core

S13-M-RL 3D Core Transformer

Advanced three-dimensional wound core design reduces no-load loss by up to 30%. Superior magnetic flux distribution.

  • 3D Amorphous Core
  • Ultra-Low No-Load Loss
  • Noise Reduction Design
110KV Series Oil Transformer

110KV Series Oil Transformer

High-voltage power transformer for substation and grid applications. Designed for long-term stability under heavy loads.

  • 110kV Class
  • 6300-50000kVA Range
  • Short-Circuit Withstand Tested
SCB10 Dry Transformer

SCB10 Epoxy Dry Transformer

Flame-retardant, maintenance-free dry-type transformer ideal for indoor installations in commercial buildings and data centers.

  • 10kV Class
  • 50-2500kVA Capacity
  • VDE & IEC Standards
LV Switchgear Cabinet

LV Switchgear Cabinet

Low-voltage distribution switchgear for safe and efficient power distribution in industrial and commercial facilities.

  • 400V System
  • IP54 Protection
  • Modular Design
HV Switchgear Cabinet

HV Switchgear Cabinet

High-voltage metal-enclosed switchgear for primary distribution systems. Reliable arc protection and monitoring.

  • 12-40.5kV Range
  • Vacuum Circuit Breaker
  • SCADA Compatible
ZGS11 Compact Substation

ZGS11 Compact Substation

Integrated outdoor substation combining transformer, MV, and LV switchgear. Fast installation, space-saving design.

  • 10kV/0.4kV
  • 50-1600kVA
  • Weather-Resistant Enclosure
YB Series Substation

YB Series Mobile Substation

Trailer-mounted substation for emergency power, construction sites, and temporary grid support. Fully pre-assembled.

  • 10-35kV Input
  • Rapid Deployment
  • Diesel Generator Ready

Why Choose JG Transformer

Advanced engineering, rigorous testing, and global compliance ensure unmatched reliability and performance.

High Productivity

Annual production capacity of 4,000 units across dry and oil-filled transformers (6kV–35kV), ensuring fast delivery and scalability.

Short-Circuit Withstand

Advanced design and manufacturing processes guarantee 100% pass rate in short-circuit withstand tests for maximum safety.

Full Vacuum Greasing

Eliminates micro-bubbles in oil, preventing partial discharge and acetylene formation—extending transformer life significantly.

Leak-Proof Tank Design

100% fluorescent leakage testing ensures zero defects. Optional corrosion-resistant coating (up to 1000hr salt spray test).

Global Certifications

Certified by ISO9001, CQC, CCC, IEC, and STL—trusted by State Grid, petrochemical firms, and international utilities.

Global Export Experience

Successfully delivered to Bangladesh, Sri Lanka, UAE, and over 50 countries. Experienced in international logistics and customs.

18+
Years in Industry
4,000
Units/Year Capacity
50+
Countries Served
100%
Tested & Certified

Frequently Asked Questions

What types of transformers does JG manufacture?

JG produces dry-type and oil-immersed power and distribution transformers from 6kV to 110kV, including S11, S13, SBH15, SCB10, and custom models.

Are your transformers certified for international markets?

Yes. Our products are certified under ISO9001, CQC, CCC, IEC, and STL standards, meeting requirements for export to Europe, Asia, Africa, and the Americas.

Can you customize transformers for specific voltage or capacity needs?

Absolutely. We offer OEM/ODM services and can design transformers to meet your exact technical specifications and environmental conditions.

What is the delivery time for standard transformers?

Typical lead time is 4–8 weeks depending on model and order volume. We maintain raw material stock for faster production.

Get in Touch

For inquiries, quotes, or technical support, visit our official website to contact the JG Transformer team.

Phone

+86 546 3692456

Mobile / WhatsApp

+86 18954672583

Email

[email protected]

Address

No.384, Chuan...

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