The Zhejiang Jiangshan Transformer (JSB) product range consists of high-quality, factory-engineered power and distribution transformers
designed to support reliable voltage transformation across renewable energy, utility, industrial, and infrastructure applications. Built to
international IEC standards, JSB transformers are engineered for high efficiency, low losses, and long service life, ensuring stable and
dependable performance in both grid-connected and standalone power systems. With strong manufacturing capability and advanced
design optimisation, the range supports scalable deployment across C&I, utility-scale renewable energy, and grid infrastructure projects,
while maintaining cost competitiveness and operational reliability.
High-Efficiency Power & Distribution Transformers.
Engineered with low-loss core materials and optimised winding design to improve efficiency, reduce heat generation, and minimise lifetime energy losses
Wide Voltage & Capacity Range
Available in multiple voltage classes and power ratings, supporting applications from small industrial systems
to large utility-scale substations.
Grid-Compliant Design (IEC Standards)
Manufactured in accordance with international IEC standards, ensuring compatibility with global grid
requirements and utility interconnection specifications.
Robust Thermal & Overload Performance
Designed for high ambient temperature environments with strong overload tolerance, ensuring stable
operation under fluctuating load conditions.
Oil-Immersed & Dry-Type Options
Offers both oil-immersed and dry-type transformer solutions, allowing flexibility for indoor, outdoor, and
environmentally sensitive installations.
Low Noise & High Reliability Construction
Advanced core stacking and vibration control design reduces operational noise while enhancing mechanical
strength and long-term reliability.
Rugged Industrial-Grade Build Quality
Built for demanding environments including renewable energy plants, mining operations, and heavy industrial
applications with strong protection against environmental stressors.
Custom Engineering & Project-Specific Design
Transformers can be tailored to specific project requirements including voltage ratios, vector groups, cooling
methods, and protection configurations.
Optimised for Renewable & Grid Applications
Well-suited for solar PV, wind, and BESS applications, enabling efficient voltage step-up/step-down
integration within modern energy systems.
Long Service Life with Low Maintenance Requirements
Designed for durability and minimal maintenance, reducing lifecycle operating costs and improving overall
system uptime.
Unit 5, no 87 Cranberry Crescent
Capital Hill, Halfway House
Midrand
Gauteng
1685
: +27(0)11 701 5200
: info@freetech.co.za
