Inductor devices – Polyphase
Patent
1976-04-15
1977-03-22
Kozma, Thomas J.
Inductor devices
Polyphase
336 90, 336175, H01F 2704
Patent
active
040139859
ABSTRACT:
A unitary three-phase current transformer having its three iron cores and three secondary coils enclosed and retained in their positions by a pair of like molded housing halves. The housing halves also have pairs of juxtaposed slots in their upper, adjacent edges for clamping pairs of secondary coil terminal inserts therebetween to mount the same so as to allow connection of the secondary coils to external conductors. The housing halves are connected together by symmetrically arranged sets of screws with the screws of each set extending through holes in the respective half and threaded into the respectively opposite half. The asembled housing halves provide three apertures through which are inserted respective bus bars serving as one-turn primary windings. A terminal strap is attached to one end of each bus bar, the bus bar is inserted through the aperture, and the other terminal strap is attached to the other end thereof. The housing halves also have slots defined by pairs of lugs through which screws extend rigidly to fix the two outer bus bars thereto, the terminal straps serving as both mounting means and electrical connecting means for the transformer.
REFERENCES:
patent: 2618689 (1952-11-01), Cook, Jr.
patent: 2644135 (1953-06-01), Schnoll
Graham Robert O.
Rauenbuehler John A.
Autio William A.
Cutler-Hammer, Inc.
Kozma Thomas J.
Rather Hugh R.
Taken Michael E.
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