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# A three-phase circuit breaker has a 15.5-kV rated maximum

## Problem 7.31 Chapter 7

Power System Analysis and Design | 5th Edition

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Power System Analysis and Design | 5th Edition

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Problem 7.31

A three-phase circuit breaker has a 15.5-kV rated maximum voltage, 9.0-kA rated short-circuit current, and a 2.67-rated voltage range factor. (a) Determine the symmetrical interrupting capability at 10-kV and 5-kV operating voltages. (b) Can this breaker be safely installed at a three-phase bus where the symmetrical fault current is 10 kA, the operating voltage is 13.8 kV, and the (X/R) ratio is 12?

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Brain & Behavior Week 4: 9/27­9/29 Lecture 7: Synapses: Circuits & Networks for Exchanging Drugs Synapses: building blocks for neural computations Synaptic Circuits  Axo­dendritic synapse  Most synapses are formed by an axon stimulating a dendrite, but axons also sometimes synapse on cell bodies or even other axons o Dendro­dendritic: In some cases, specialized...

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