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US 4,884,164 AGranted
Molded case electronic circuit interrupter
AssigneeGeneral Electric Company
InventorsRichard A. Dziura, Ronald R. Russell, Graham A. Scott
Life of this patent
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Abstract
An electronic trip unit within a self-contained circuit interrupter utilizes dual electromagnetic trip actuators. One such actuator responds to overcurrent conditions to interrupt the protected circuit up to a predetermined value. The other such actuator interrupts the protected circuit at all overcurrent conditions in excess of the predetermined value.
Claims23
A circuit interrupter comprising:
- a case and a cover;
- a pair of separable contacts within said case under control of an operating mechanism;
- an electronic trip circuit within said cover connected with a first trip coil to articulate said operating mechanism and separate said contacts upon occurrence of first overcurrent conditions through said contacts;
- and
- a second trip coil connected to said first trip coil to articulate said operating mechanism and separate said contacts upon occurrence of second overcurrent conditions through said contacts.
2 more elements
Dependencies are inferred from the claim text.