MIDEL® 7131 is supported by a variety of technical datasheets and other additional information. To view the individual sheets click on the links below to download the printable PDF files. To view the full set of Technical Datasheets in one printable PDF file click here.

MIDEL® 7131 User List
An overview of industries and customers.
MIDEL® 7131 Product Overview
Product description, areas of application, properties, retrofilling, disposal, regulations, IEC 61099 specification.
MIDEL® 7131 Comparative Data Fluids
A comparison of MIDEL® 7131, mineral oil and silicone fluid.
MIDEL® 7131 Comparative Data Cast Resin
A comparison of MIDEL® 7131 fluid filled transformers and cast resin transformers.
MIDEL® 7131 Ignition Resistance
Details of ignition tests comparing MIDEL® 7131 with mineral oil.
MIDEL® 7131 Smoke & Fumes
Behaviour under fire conditions regarding smoke density and fume composition compared to other liquid filled transformers.
MIDEL® 7131 Environmental Behaviour
Details of independent studies showing significant environmental advantages of MIDEL® 7131 over both mineral oil and silicone fluid.
MIDEL® 7131 Water Hazard Classification
Details of MIDEL® 7131’s classification by the German Federal Department of the Environment as "non-water hazardous".
MIDEL® 7131 Moisture Behaviour
The differences between MIDEL® 7131 and mineral oil in terms of moisture behaviour.
MIDEL® 7131 Safety Data Sheet
Materials Safety Data Sheet for MIDEL® 7131.
MIDEL® 7131 Maintenance Guide Distribution Transformers
A guide to the maintenance of MIDEL® 7131 in distribution transformers with rated operational voltages up to 35 kV.
MIDEL® 7131 Retrofilling
Practical procedures for replacing mineral oil with MIDEL® 7131 in transformers.
MIDEL® 7131 Materials Compatibility
Guidance on compatibility of MIDEL® 7131 with materials commonly used in transformers.
MIDEL® 7131 Thermal Properties
Tabulation of the thermal properties from -30 to +100°C.
Fire Safety Standards, Ratings and Regulations

FURTHER INFORMATION

Transforming Expectations - Transformer Selection Paper
Technical Paper comparing fluid filled high fire point solutions with cast resin or dry type transformers.
What's Your Transformer Got in the Tank?
The benefits of using Midel® as opposed to mineral oil in wind turbines.This article appeared in the July August issue 2007 of Windtech International and is displayed with permission. Copyright 2007 by Siteur Publications.
Bio-SliM®
A new generation of environmentally safe transformers.
MIDEL® Offshore and Renewables Brochure
MIDEL the fire safe, environmentally friendly choice for transformers used in offshore and renewables.
MIDEL® Traction and Trackside Brochure
MIDEL the fire safe, environmentally friendly choice for traction and trackside transformers.
Allianz Fire Test
Allianz Fire Test on a Transformer filled with MIDEL® 7131. Midel did not burn and the transformer was still operable at the end of the test
PCB Transformers and Capacitors from Management to Reclassification and Disposal
A United Nations Environment Programme Chemicals paper on handling PCB filled transformers.
Retrofilling of Transformers – Facts and Arguments
A paper by Volker Wasserberg detailing the advantages of retrofilling transformers with ester liquids like MIDEL® 7131.
The First MIDEL® 7131 Insulated 238 kV Power Transformer
Details of the first power transformer of this rating from the standpoint of a transformer manufacturer, VA Tech EBG.
Vattenfall Case Study – New oil reduces risk of fire in tunnels
Details of a press release published by Vattenfall on their website in June 2002 about the use of MIDEL® 7131 in a 150kV transformer at Umluspen power station to reduce the risk of fire in tunnels.
Enhancing Transformer Life
The effects of moisture on transformer life and the implications of using MIDEL® 7131.

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