Browse Prior Art Database

Reset for Remotely Positioned Main Circuit Breaker

IP.com Disclosure Number: IPCOM000042772D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Dibble, WF: AUTHOR [+2]

Abstract

In a typical data processing system, the primary or main connection to an AC power source is effected via a circuit breaker housed at a remote point in the system's protected cabinet. Ordinarily, when tripped, the breaker is reset manually, which requires entry into the protective cabinet, or automatically, which requires some type of costly low-voltage-actuated relaying system. Another alternative would bring the power connection point to a location in the cabinet that would give an operator easy access thereto for reset purposes. However, that alternative would require routing some amount of high level and noisy AC power lines past critical system circuitry.

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Reset for Remotely Positioned Main Circuit Breaker

In a typical data processing system, the primary or main connection to an AC power source is effected via a circuit breaker housed at a remote point in the system's protected cabinet. Ordinarily, when tripped, the breaker is reset manually, which requires entry into the protective cabinet, or automatically, which requires some type of costly low-voltage-actuated relaying system. Another alternative would bring the power connection point to a location in the cabinet that would give an operator easy access thereto for reset purposes. However, that alternative would require routing some amount of high level and noisy AC power lines past critical system circuitry. Instead, it is proposed that the main system power circuit breaker be kept at a remote location closest to the AC power source and that a mechanically actuated unit emergency power off (UEPO) be utilized to both trip and reset the breaker. The UEPO system is illustrated in the figure. It primarily consists of an externally accessible toggle lever 10 which, when actuated, moves a cable 12, such asa music wire, that is housed in a plastic sheath 14. The ends of cable 12 are captured in a pair of clevises 16 and 18, respectively. Clevis 18 is mounted beside the main power circuit breaker 20, in cooperative fashion with the positioning arm 22 thereof. The cable 12 serves as a direct and fixed link between the lever 10 and positioning arm 22. The inner wall of p...