Fluid Management

Introduction
Dielectric fluids and gases are an important part of the insulation system of a transformer. Circulating fluids and gases not only insulate, they also absorb and transfer heat, thus reducing the hot spot temperature and extending the life time of transformers. WEIDMANN offers products in the field of cooling & expansion systems, insulation fluids & gases, moisture holders, valves and ventilators.

Field of application
They are used in the distribution & power transformer industry.

Products

Cooling Systems
These products are supplied as individual components or as complete engineered replacement or enhancement system solutions. Heat Exchangers can be supplied for either oil/air forced or oil/water forced systems, complete with cooling pumps and cooling fans. Panel radiators can be supplied as products or systems with cooling fans. Corrugated wall radiators can be supplied; ventilators/cooling fans can also be supplied as separate components.

Expansion Systems/Flexible Separators
Dielectric fluid expansion systems isolate the transformer fluid from the atmosphere, preventing contamination, gas and/or moisture from coming into contact with the transformer dielectric fluid.

Insulating Fluids and Gases
Transformer capacity, space, enviromental safety, non-flammability could all be reasons for the necessity of a different insulating medium than the traditionally used mineral oil. Usually, such transformers operate at higher temperatures and there are different products available for this purpose.

Moisture Holders
Moisture is either produced by the aging of the insulation and/or penetration from outside. Together with the heat, moisture will accelerate the aging of the electrical insulation systems. Moisture holders contain materials that have a higher water absorbtion capacity than the insulation fluids and thus can dehumidify and help protect the insulation systems.

Valves
Electrical Apparatus valves are installed at various places of the transformer for fluid handling (filling or removal), or for providing a means of interrupting fluid circulation when performing maintenance or fluid sampling.

Ventilators
Ventilators are installed to enhance the cooling capacity of the radiators. Ventilators are available with alternative mounting positions, and in various sizes, all with an extremely low noise level. WEIDMANN can supply ventilators with all of the necessary mounting hardware as well as plugs, cords, receptacles and junction boxes.