Face connected instrument transformer
First Claim
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1. An instrument transformer having a plurality of transformation ratios for connection to at least one external circuit comprising:
- an elongated housing having at least one face with a plurality of longitudinally offset surfaces;
a plurality of pairs of first circuit terminals disposed adjacent different ones of said surfaces such that each pair of said first circuit terminals is coplanar and longitudinally offset from each other pair of terminals;
a plurality of first circuit windings disposed within said housing, each winding electrically connected to one pair of said first circuit terminals;
one or more pairs of second circuit terminals disposed exteriorly on said housing;
one or more second circuit windings positioned within said housing in magnetic coupling relationship with at least one of said first circuit windings and electrically connected to said one or more pairs of second circuit terminals.
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Abstract
A face connected instrument transformer is disclosed having a plurality of transformation ratios comprised of two primary windings and a single secondary winding. Each primary winding is electrically connected to a pair of terminals disposed adjacent to opposite faces of the transformer housing for engaging contacts within a molded case circuit breaker housing. The transformation ratio of the instrument transformer is changed by removing the instrument transformer from the circuit breaker housing and inserting the opposite face.
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Citations
15 Claims
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1. An instrument transformer having a plurality of transformation ratios for connection to at least one external circuit comprising:
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an elongated housing having at least one face with a plurality of longitudinally offset surfaces; a plurality of pairs of first circuit terminals disposed adjacent different ones of said surfaces such that each pair of said first circuit terminals is coplanar and longitudinally offset from each other pair of terminals; a plurality of first circuit windings disposed within said housing, each winding electrically connected to one pair of said first circuit terminals; one or more pairs of second circuit terminals disposed exteriorly on said housing; one or more second circuit windings positioned within said housing in magnetic coupling relationship with at least one of said first circuit windings and electrically connected to said one or more pairs of second circuit terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An instrument transformer having a plurality of transformation ratios comprising:
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four pairs of primary terminals; two primary windings each electrically connected to two pairs of said primary terminals; a set of secondary terminals; a secondary winding magnetically coupled to said primary windings and electrically connected to said secondary terminals; a closed housing having two sides and two oppositely disposed faces for containing said primary windings and said secondary winding;
wherein two pairs of said primary terminals, each pair electrically connected to a different primary winding, are disposed on each of said opposite faces. - View Dependent Claims (12, 13, 14, 15)
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Specification