MAGNETIC SHIELD STRUCTURE FOR CURRENT CONVERTER FOR MEASURING INSTRUMENT

PROBLEM TO BE SOLVED: To obtain an excellent magnetic shield effect while simplifying an assembling and decomposing work. SOLUTION: This magnetic shield structure is constituted of a panel part 11 being one part of a case body and a shield case 21 for shielding a converter 12 for measuring instrumen...

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Bibliographic Details
Main Authors HEIJI TOSHIO, NARUSAWA TOMOHIRO
Format Patent
LanguageEnglish
Published 08.12.2000
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:PROBLEM TO BE SOLVED: To obtain an excellent magnetic shield effect while simplifying an assembling and decomposing work. SOLUTION: This magnetic shield structure is constituted of a panel part 11 being one part of a case body and a shield case 21 for shielding a converter 12 for measuring instrument mounted through a supporting arm part 14 on the panel part 11 from an outer magnetic field with an inner case unit 22 and an outer case unit 32. The inner case unit 22 is formed by fixing a chassis plate 23 and a shield plate 25 and a shield case part 26, and the outer case unit 32 is formed by fixing a primary shield case part 33 whose outer cover for the shield case part 26 is freely formed and a secondary shield case part 35 whose outer case for the primary shield case part 33 is freely formed. Then, the outer case unit 32 is integrally fixed to the inner case unit 22 in which the converter 12 is housed and which is fixed to the side of the panel part 11 in a state that the shield case part 26 is covered from the lower part through notched parts 32d and 35d while the supporting arm part 14 is introduced.
Bibliography:Application Number: JP19990153912