Dynamics of High-Capacity Outdoor Oil Circuit Breakers [includes discussion]

Barkan, P.

doi:10.1109/aieepas.1955.4499132

Cited by 8 publications

(4 citation statements)

References 1 publication

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“…5 Graph of fatigue strength versus fatigue life for fluctuating loading In many cases, the required design specification for the fatigue life of the ACB is defined as 5000 closing and opening cycles. Then, the fatigue strength in the case of 5000 cycles is calculated as 663.0 MPa from equation (3). Additionally, if a safety margin is applied, the fatigue strength of the links can be redefined as 464.1 MPa, i.e.…”

Section: Physical Properties Of the Linksmentioning

confidence: 99%

“…In previous studies [2,3], analyses of high-speed circuit breakers were based on the dynamics of the breakers by means of the designer's empirical knowledge with trial-and-error approaches instead of systematic methods. Recently, multi-body dynamic analyses have been performed successfully with the help of powerful computer systems and analysis codes such as ADAMS [4].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic analysis and structural design of links in an air circuit breaker to enhance fatigue life

Park

Ahn

Lee

2005

Proceedings of the Institution of Mechanical Engineers, Part C:

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A systematic method as applied to an air circuit breaker (ACB) system is proposed to analyse the links of the spring-actuated linkage under repetitive impact loading. A fatigue life equation applicable to the links is presented on the basis of the fatigue test. The result obtained from the multi-body dynamic analysis is compared with that from the experiment. For the explicit finite element analysis of the links, the impact loading obtained from the dynamic analysis of the ACB system is used as the initial conditions. To enhance the fatigue life of a weak link, two modified designs are proposed and their maximum stresses are reduced very much compared with that of the original design. Considering a safety margin, one modified design satisfies the required specification of the fatigue life. The proposed approach in this work can be efficiently used in designing stable and reliable links of the ACB and in analysing a similar spring-actuated linkage system.

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Section: Physical Properties Of the Linksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic analysis and structural design of links in an air circuit breaker to enhance fatigue life

Park

Ahn

Lee

2005

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…Bush and Carter proposed the application of Galerkin' s method in the solution of the non-linear equations of motion of a pneumatically actuated circuit breaker [4]. Barkan modelled oil circuit breakers as an equivalent mass spring system with a single degree of freedom [5]. These methods assumed the equations of motion to be piecewise linear over portions of a total displacement, or they could not fully consider the above-mentioned characteristics.…”

Section: Introductionmentioning

confidence: 99%

Modelling and analysis of a high-speed circuit breaker mechanism with a spring-actuated cam

Ahn¹,

Kim

2001

Proceedings of the Institution of Mechanical Engineers, Part C:

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The dynamic model of a high-speed circuit breaker mechanism with a spring-actuated cam is derived, and its validation and appropriateness for an analysis of high-speed motion behaviour are checked through experiments. In particular, the characteristics of the friction on the camshaft are investigated using the non-linear pendulum experiment. The parameters of the friction model are estimated using an optimization technique. The analysis shows that the friction of the pendulum depends on stick± slip, the Stribeck eVect and viscous damping. The simulation results of derived dynamic models for the rapid closing and opening operations are compared with actual responses using a high-speed camera and are investigated to validate their usefulness. The spring motion, which has much in¯uence on the closing responses, is observed.

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“…This experience, combined with a good deal of inspired hunchwork, would agree with many of the authors' observations regarding the effects of friction, flexibility, clearances, and stiffness of the links and their joints on the dynamics of the mechanisms. Considerable work has been done to support the design of circuit breaker mechanisms and although not all of this has been published, some relevant papers [14][15][16][17] 4 are given later. The large mechanisms transmit forces of hundreds of pounds through distances up to 30 ft with mechanism strokes up to 12 in.…”

mentioning

confidence: 99%

Discussion: “An Experimental and Analytical Study of Connection Forces in High-Speed Mechanisms” (Dubowsky, S., and Young, S. C., 1975, ASME J. Eng. Ind., 97, pp. 1166–1174)

Skreiner

1975

Journal of Engineering for Industry

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Dynamics of High-Capacity Outdoor Oil Circuit Breakers [includes discussion]

Cited by 8 publications

References 1 publication

Dynamic analysis and structural design of links in an air circuit breaker to enhance fatigue life

Dynamic analysis and structural design of links in an air circuit breaker to enhance fatigue life

Modelling and analysis of a high-speed circuit breaker mechanism with a spring-actuated cam

Discussion: “An Experimental and Analytical Study of Connection Forces in High-Speed Mechanisms” (Dubowsky, S., and Young, S. C., 1975, ASME J. Eng. Ind., 97, pp. 1166–1174)

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