Measuring transformer for solid-state electricity meters
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United States of America Patent
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-
Dec 24, 1996
Issued Date -
N/A
app pub date -
Aug 8, 1994
filing date -
Dec 13, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a measuring transformer which contains a primary conductor which carries current to be measured, and a secondary coil which is magnetically coupled thereto. The primary conductor is shaped helically and forms a body, like a helical spring, which surrounds the secondary coil with at least one turn. The primary conductor is preferably formed by a tube having a spiral groove which passes through its wall. The primary conductor has inherent stability which is very high such that no special holding means are required for the secondary coil. The secondary coil is extremely easy to install in the primary conductor and there are no problems with installation tolerances and the like.
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