Abstract:
An electric circuit breaker containing electromagnetic-assist means for opposing the contact-repulsion forces developed when a high current flows through the breaker. The electromagneticassist means comprises a rigid support member which when restrained in a fixed position renders the assist means capable of transmitting closing force to the movable contact but which, when released, disable the assist means. Releasable latching means restrains the support member in said fixed position when the contacts are engaged. This latching means is controlled by the motion of a contact-operating member that is coupled to the movable contact through a suitable wipe mechanism.
Abstract:
Discloses a vacuum-type circuit interrupter comprising currentresponsive means for varying its opening stroke length in accordance with the magnitude of the current being interrupted.
Abstract:
RELATES TO A HIGH-VOLTAGE ELECTRIC CIRCUIT BREAKER WITH HIGHSPEED TRIPPING MEANS COMPRISING A CAPACITOR LOCATED IN A REGION OF LINE POTENTIAL. TRIPPING IS EFFECTED BY DISCHARGING THE CAPACITOR. THE CAPACITOR IS MAINTAINED IN A CHARGED CONDITION BY MEANS COMPRISING A HYDRAULIC MOTOR IN THE REGION OF LINE POTENTIAL, A PUMP IN A REGION OF GROUND POTENTIAL, AND A HYDRAULIC CIRCUIT INTERCONNECTING THE PUMP AND MOTOR. THE HYDRAULIC CIRCUIT HAS PORTIONS EXTENDING BETWEEN SAID LINE POTENTIAL REGION AND SAID GROUND POTENTIAL REGION WHICH ARE PRIMARILY OF ELECTRICAL INSULATING MATERIAL.
Abstract:
A control for the control-valve mechanism of an electric circuit breaker comprises means biasing the operating piston of said mechanism in a direction to effect circuit-breaker closing. Releasable latch means restrains the operating piston in a circuit-breaker-open position against this bias. A closingcontrol operator for the latch means is operable to release the latch means, thereby allowing the operating piston to be moved in a circuit-breaker-closing direction. An opening-control operator is effective when operated to develop an opening-control force for use in driving the operating piston through opening-control motion. Force-transmitting means effective when the latch means is reset serves to transmit said opening-control force from said opening-control operator to said operating piston. Latchresetting means effectively resets the latch means following and in response to release of the latch means.
Abstract:
A rectifier assembly comprises (a) a wafer primarily of semiconductor material having a pair of faces at opposite sides thereof and (b) a pair of liquid-metal cooling systems respectively located at opposite sides of the wafer. Each cooling system comprises a heat sink adjacent the wafer and a fluid circuit comprising a first passage extending through the heat sink and a second passage extending along a face of the wafer and feeding the first passage. Each cooling system further comprises, electrically in series with the wafer, an electromagnetic pump that is effective when energized by current through the rectifier assembly to force liquid metal coolant to flow around said fluid circuit, extracting heat from said wafer while flowing through said second passage and releasing heat to said heat sink when flowing through said first passage.
Abstract:
Discloses a high-voltage circuit breaker comprising a control device at high potential operable to produce separation of the usual contacts of the breaker, an operator at ground potential for operating the control device, and a linkage mechanically connecting the operator and the control device. The linkage comprises a releasable coupling at a location of substantially line potential that is releasable to allow the control device to be operated independently of the operator. Latch means normally prevents coupling-release but is operable in response to predetermined electrical conditions to release the coupling and allow high-speed operation of the control device before the operator operates.