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Output range from 50kVA up to 0 MVA
Operating voltages up to 52 kV
Customized solutions for
Based on trials of cast resin-insulated dry-type transformers in the 1950s, the GEAFOL cast-resin transformer, with its pioneering winding concept, was officially launched in 1965. Since 1966, GEAFOL has been the perfect solution wherever distribution transformers have to guarantee maximum safety in the direct proximity of people. Other outstanding features of the GEAFOL transformers are their high dependability, long life and low environmental impact.
GEAFOL dry-type transformers satisfy the requirements of the highest-defined classes, as proven by comprehensive testing:
GEAFOL Cast-Resin Transformers can be designed to fulfill the new EU requirements for transformers, which will apply throughout Europe starting in July 2015.
We produce the GEAFOL in accordance with VDE 0532-76-11, IEC 60076-11, DIN EN 60076-11, DIN EN 50541-1 and EN 50588-1 (ecodesign). GEAFOL dry-type transformers also can be designed to meet special national specifications, or customers’ wishes. The high quality standard of the GEAFOL transformers was confirmed from the result of several tests: For example, one and the same GEAFOL transformer has passed all defined routine, type, and special tests, as well as additional tests, with flying colors. The comprehensive safety certification enables the use in almost every environment and under extremely harsh conditions such as:
GEAFOL dry-type transformers are insulated with an epoxy resin and quartz powder mixture – an eco-friendly material that makes the winding
No toxic gases are produced, not even under the effects of arcing. And the specially developed spacers of the coil support system ensure isolation of vibrations from the iron core, which means very low noise levels.
The coils of the high-voltage windings are made of aluminum foil.
Why foil windings?
On request, we offer dry-type transformers with copper windings.
The high voltage windings are potted with epoxy resin under vacuum at a high temperature:
The low-voltage strip winding is also made of aluminum. The width of the aluminum strip is equal to the length of the coil:
The conductor strip and insulation material are bonded together by heating:
GEAFOL dry-type transformers still have benefits even at the end of their life cycle: without any danger to the environment, 94 percent of the material can be recycled.
For our GEAFOL dry-type transformers, we offer accessories and tailored solutions that suit your individual needs. Here is a selection of additional equipment available upon request:
The following operating instructions guide you through installation, connection, temperature monitoring, commissioning as well as cleaning and inspection of your GEAFOL:
With our GEAFOL App for Apple and Android devices, you can watch the operating instructions on- and offline on your tablet or smartphone:
Our responsibility does not end upon delivery. On request, we provide comprehensive assistance for GEAFOL dry-type transformers:
- Programming control systems
- Taking measurements on-site
In addition, we offer individual trainings for your employees and professional training events. For more information, feel free to contact us.
For your convenience, we have assembled relevant downloads as well as details of support contacts below.
Fields of operation
Since 1965, over 100,000 GEAFOL Cast-Resin Transformers have proven themselves in power distribution or converter operation around the globe. Whether in a wind park in Tasmania, a paper production factory in South Africa, or the Transrapid line between Shanghai and the Pudong, our dry-type transformers ensure reliable power supply anywhere, any time.
approximate savings on CO2 emissions
approximate overall machinery efficiency
maximum power consumption
Despite its huge IT area, the data center ranks among the most modern and energy-efficient in its class
drilling depth below the sea floor
Do you need a tailored transformer solution to meet your unique business challenges? Tell us your requirements and we will find the right GEAFOL dry-type transformer.