Mefta Green Transfo

Polish manufacturer
of distribution transformers
since 1945

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We are a transformer manufacturer combining extensive experience with modern technologies.

Products

We provide innovative and reliable solutions that meet the highest standards, ensuring stable and efficient operation of power systems worldwide.

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What makes us different?

Advanced technology and craftsmanship precision 
Our transformers are made using modern technologies and precise production processes, which guarantees the reliability and durability of the devices.
Quality controlled at every stage
Every stage of production is subject to rigorous control, and advanced tests in our laboratory to ensure full compliance with international standards and customer requirements.
Professional service and comprehensive support
Access to fast after-sales service, support from the manufacturer, and expert knowledge help keep devices in top condition throughout their entire service life.
Solutions designed to your needs
Our transformer designs are created with individual requirements and application specifics in mind, allowing for optimal use in various sectors.
Innovation and constant growth
Continuous investment in research and development translates into more efficient and increasingly environmentally friendly products.
Environmental responsibility
The use of eco-friendly materials and minimization of environmental impact are part of our sustainable production development strategy.
Oil-immersed Transformer SPHERA DT

A three-phase oil-immersed transformer designed for standard applications in low and medium voltage networks.

Compact, durable, and fully compliant with European standards, it is ideal for power grids, industrial installations, and renewable energy projects.

SPHERA DT Transformer – Special Design

Special versions of SPHERA DT are customized to meet individual technical requirements, including pole-mounted, grounding, and converter transformers. Ideal for photovoltaic farms, wind farms, and charging stations.

Construction and material options are available according to customer specifications.

High-power oil-immersed transformer SPHERA MPT

High-performance oil-immersed transformer up to 135 MVA and 170 kV. Designed for demanding applications in professional power generation and heavy industry.

Manufactured at the Green Transfo plant in Turkey, maintaining the highest standards of quality and safety.

Transformer with on-load tap changer (OLTC) with voltage regulation

The transformer equipped with an on-load tap changer (OLTC) enables dynamic voltage regulation during operation.

Perfect solution for networks with variable parameters and renewable energy installations. Control options include manual, automatic, or remote operation.

Transformer cooled by biodegradable fluids

An eco-friendly solution using natural or synthetic esters.

Reduces fire risk, enhances environmental safety, and allows installation in sensitive locations such as residential buildings, hospitals, and tunnels.

Dry-type resin distribution transformer

Our resin transformers are an excellent solution for modern buildings, industrial halls, and urban infrastructure.

With no oil, low noise emission, the highest level of safety, and a compact enclosure, they are the ideal choice for future-proof projects.

Resin Transformer – Special Design

Special designs of resin transformers provide unmatched mechanical strength, environmental resistance, and full configuration flexibility.

They are the ideal solution for demanding applications — from UPS systems to advanced renewable energy installations.

Dry-type resin distribution transformers Trihal under Schneider Electric license

Our resin transformers are an excellent solution for modern buildings, industrial facilities, and urban infrastructure.

Oil-free, low noise emission, highest safety standards, and a compact enclosure make them the ideal choice for future-ready projects.

Oil-immersed Transformer SPHERA DT
SPHERA DT Transformer – Special Design
High-power oil-immersed transformer SPHERA MPT
Transformer with on-load tap changer (OLTC) with voltage regulation
Transformer cooled by biodegradable fluids
Dry-type resin distribution transformer
Resin Transformer – Special Design
Dry-type resin distribution transformers Trihal under Schneider Electric license