Abstract: Disclosed is a base agent for electrical insulating oils, which mainly contains an esterified product of glycerin and a linear or branched, saturated or unsaturated fatty acid having 6-14, preferably 8-12 carbon atoms. This base agent for electrical insulating oils is excellent in electrical characteristics, oxidation stability, cooling characteristics, flame retardance and safety. In particular, this agent for electrical insulating oils can meet energy/environmental problems by using an edible oil and fat, which is obtained by using a fatty acid derived from a vegetable oil as a raw material, as the linear or branched, saturated or unsaturated fatty acid having 6-14 carbon atoms.

Abstract: A base for electric insulating oil comprising an esterification product from a C8-C20 higher fatty acid and a C6-C14 branched aliphatic monohydric alcohol; or a base for electric insulating oil comprising an esterification product from a mixed fatty acid derived from palm oil and/or mixed fatty acid derived from soybean oil and a C1-C5 aliphatic monohydric alcohol or C6-C14 branched aliphatic monohydric alcohol. The thus provided base for electric insulating oil excels in viscosity, fluidity, chemical stability, etc. and is capable of satisfactorily exhibiting electrical characteristics of electric insulating oil.

Abstract: There are provided an electron beam application method and an electron beam application device capable of uniformly applying electron beams to an object even if the electron beams have a low energy. For this, electron beams (EB) are applied to a beverage container (30) (object) within a magnetic barrier (MF) formed by combining a plurality of magnetic fields generated in an electron beam application region.

Abstract: Disclosed is a base agent for electrical insulating oils, which mainly contains an esterified product of glycerin and a linear or branched, saturated or unsaturated fatty acid having 6-14, preferably 8-12 carbon atoms. This base agent for electrical insulating oils is excellent in electrical characteristics, oxidation stability, cooling characteristics, flame retardance and safety. In particular, this agent for electrical insulating oils can meet energy/environmental problems by using an edible oil and fat, which is obtained by using a fatty acid derived from a vegetable oil as a raw material, as the linear or branched, saturated or unsaturated fatty acid having 6-14 carbon atoms.

Abstract: There are provided an electron beam application method and an electron beam application device capable of uniformly applying electron beams to an object even if the electron beams have a low energy. For this, electron beams (EB) are applied to a beverage container (30) (object) within a magnetic barrier (MF) formed by combining a plurality of magnetic fields generated in an electron beam application region.

Abstract: A base for electric insulating oil comprising an esterification product from a C8-C20 higher fatty acid and a C6-C14 branched aliphatic monohydric alcohol; or a base for electric insulating oil comprising an esterification product from a mixed fatty acid derived from palm oil and/or mixed fatty acid derived from soybean oil and a C1-C5 aliphatic monohydric alcohol or C6-C14 branched aliphatic monohydric alcohol. The thus provided base for electric insulating oil excels in viscosity, fluidity, chemical stability, etc. and is capable of satisfactorily exhibiting electrical characteristics of electric insulating oil.

Abstract: In an optical current transformer, an optical sensor is made up of two optical sensor units which are independent of each other. Incident light beams are applied to the optical sensor units, and the emergent light beams from the latter are subjected to addition, to obtain a measurement signal which is proportional to a current under test which flows in a conductor. The optical sensor units are substantially U-shaped bars, which are Faraday effect glass bars which are rectangular in cross section and have 45.degree. reflecting surfaces at the corners.

Abstract: An optical current transformer for measuring a current flowing through a conductor by transmitting a light beam about the current-carrying conductor includes four Faraday effect glass rods. For transmitting the light beam, the rods are arranged in a rectangle forming a through hole for the conductor. Three optical path changing pieces are included, each for redirecting the light beam from one of the glass rods to a different one of the glass rods, and each being positioned at a different corner of the glass rod rectangle. Two substrate plates, each having a through hole for the conductor, are positioned at opposite sides of the glass rod rectangle to sandwich the glass rods and the optical path changing pieces therebetween. The glass rods are substantially fixed while allowing for thermal expansion and contraction of the glass rods.