Advanced concepts for transformers pressboard dielectric constant and mechanical strength
Of the numerous electrical considerations in a material, the value of the dielectric constant serves as an important criterion in designing proper insulation systems. The goal of this project was to find ways to reduce the dielectric constant of solid (fibrous) insulating materials. A literature search was made on cellulosic and synthetic fibers and also additives which offered the potential for dielectric constant reduction of the solid insulation. Sample board structures, were produced in the laboratory and tested for electrical, mechanical and chemical characteristics. Electrical tests determined the suitability of the material at transformer test and operating conditions. The mechanical tests established the physical characteristics of the modified board structures. Chemical tests checked the conductivity of the aqueous extract, acidity, and ash content. Further, compatibility with transformer oil and some aging tests were performed. An actual computer transformer design was made based on one of the modified board structures and the reduction in core steel and transformer losses were shown.
- Research Organization:
- EHV-Weidmann Industries, Inc., St. Johnsbury, VT (USA); Weidmann (H.) Ltd., St. Johnsbury, VT (USA)
- DOE Contract Number:
- AC01-78ET29307
- OSTI ID:
- 5344546
- Report Number(s):
- DOE/ET/29307-1; ON: DE82015477
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CELLULOSE
COST
DIELECTRIC PROPERTIES
CERAMICS
DIELECTRIC MATERIALS
POLYMERS
POLYPROPYLENE
TRANSFORMERS
ELECTRICAL INSULATION
CHEMICAL PROPERTIES
COMPARATIVE EVALUATIONS
FIBERS
GLASS
IMPREGNATION
INSULATING OILS
MATERIALS TESTING
MECHANICAL PROPERTIES
CARBOHYDRATES
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
EQUIPMENT
MATERIALS
OILS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
POLYOLEFINS
POLYSACCHARIDES
SACCHARIDES
TESTING
200300* - Electric Power Engineering- Power Transmission & Distribution- (-1989)