Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 111 for “"breaker"”.
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Relay coordination with multiple breaker-in/breaker-out stations on the transmission line
… Authority (TVA) planners want to add multiple breaker-in/breaker-out stations on a two terminal transmission lines to reduce the number of Customer Connection Point Interruption (CCPI). This paper discusses the difficulty of setting up the zone distance relays and overcurrent relays when …
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Direct current hybrid vacuum breaker
Hybrid DC circuit breaker switching techniques have been proposed for use in multi-terminal HVDC networks, to create an efficient, reliable and controllable system. There are two DC hybrid switching techniques. The first is arc interruption based on current oscillation. The second is interruption …
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Investigating DC circuit breaker service life
… methods to extend the service life of DC circuit breakers using inductive voltage spike mitigation techniques aimed at reducing electric arcs during switching operations. Unlike AC systems, DC lacks a natural zero-crossing which results in large transient voltages that accelerate switch wear and …
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Design of a silicon waver breaker
… top might have delicate components. The wafer breaker was designed to hold the wafer on two plates, where one of them is hinged. The wafer is scribed above the hinge line, and the hinged plate is pushed down to fracture the wafer. Several methods of holding the wafer down with vacuum were …
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Signal Breaker: Fuzzing Digital Signal Processors
Fuzzing is one of the most popular ways to find vulnerabilities in software. A fuzzer uses feedback from the execution of previous test cases to create new test cases through random mutation and the software under test executes these generated test cases to find crashes. Applications, operating …
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A Fast Acting DC Solid State Circuit Breaker.
North Carolina State University Theses Electrical and Computer Engineering.
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A critical edition of William Sampson's 'The Vow Breaker' 1636.
… Sampson's mid-seventeenth-century play, The Vow Breaker, or The Fair Maid of Clifton, edited according to the guidelines set down by the Revels Plays Series. The Introduction is divided into ten sections: William Sampson; performance; synopsis; the siege of Leith; navigation of the Trent; other …
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Analysis in circuit breaker performance requirements for high-voltage DC networks
… unable to transfer power. Prototype dc circuit breakers have been developed by manufacturers to, in theory, allow seamless operation of the healthy areas of the network when a fault occurs. In order to do this they operate extremely fast; opening in less than 5ms. To achieve this the topologies …
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The arctic submarine, an alternative to ice breaker tankers and pipelines
… the "mega-project" alternatives (pipelines, ice-breaker tankers, and giant submarine tankers), existent and proposed; and the obstacles-financial, political, environmental and physical--that confront any potential Arctic Transport developer. He discusses the advantages and vulnerabilities of each …
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Graphical analysis of recovery voltage across a resistance-shunted circuit breaker
Thesis: B.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1959
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A retrot current sensor for non-intrusive power monitoring at the circuit breaker
… that measures current flow in a circuit breaker without permanent modification of the breaker panel or the circuit breaker itself. At the breaker panel, an inductive pickup and low-power amplifier sense current from the breaker face. Two coupled resonators form an inductive link that …
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Design, Optimization and Development of Ultra-fast Mechanical Switch for DC Circuit Breaker Applications.
North Carolina State University Theses Electrical and Computer Engineering.
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Improving fault location through interpole analysis of circuit breaker and automatic reclose scheme operation
… which arise during the operation of the circuit breaker as the individual poles open sequentially, has been developed. The proposed fault location technique has been shown to have a very high theoretical accuracy by eliminating the aforementioned negative effects associated with conventional …
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Power Device and MOV Analysis for the Design of Low Voltage Hybrid DC Circuit Breaker.
North Carolina State University Theses Electrical and Computer Engineering.
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Hybrid Modular Multilevel Converter Family and Modular DC Circuit Breaker for Medium-voltage DC (MVDC) Applications
… and equipment, particularly DC circuit breakers (DCCB), poses a significant challenge to the development of MVDC systems. Therefore, this thesis aims to address two primary challenges in the field: the improved topologies of MV AC/DC conversion techniques for interfacing MVDC systems …
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The Media as an Image Maker/Breaker: The Case of Tina Modotti and Its Literary Representation
… Chapter V links the use of the media as an image breaker to the Mexican social and political context in the 1920s, and suggests political reasons behind Modotti's mistreatment by the press. In addition, the literary representation of Modotti in <U>Tinísima</U> and the analysis through …
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Molecular mechanism of Abeta recognition and neuroprotection by the glycoconjugate beta-sheet-breaker peptide Ac-LPFFD-Th
… showed a direct interaction between these beta-breaker peptides and Abeta monomers. In this work, the C-terminal trehalose conjugated Ac-LPFFD-Th derivative ability to recognize and bind low molecular weight aggregated forms of Abeta has been investigated by means of different biophysical …
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Investigation on no-load mechanical endurance and electrical degradation of a circuit breaker model under short circuit current interruption
The demand on reducing circuit breaker failure, extending service life, increasing equipment reliability and lowering the related operating and maintenance costs are nowadays of prime importance for the electricity supply network. According to statistics, the major failure mode is originated from …
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Design, Simulation, and Hardware Construction of a 600 W Solid State DC Circuit Breaker for the DC House Project
<p>DC circuit breakers must be able to arrest overcurrent conditions to prevent electrical equipment and wiring from causing building fires or other hazards from occurring. With more DC renewable sourced structures such as Cal Poly’s DC House, an inexpensive and reliable protection system is …
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