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Electric Power Distribution Engineering, 3rd Edition by Turan Gonen

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Chapter 10

Distribution System Protection

It is curious that physical courage should be so common in the world and moral courage so rare.

Mark Twain

A lie can travel halfway around the world while the truth is putting on its shoes.

Mark Twain

10.1 Basic Definitions

Switch: A device for making, breaking, or changing the connection in an electric current

Disconnect switch: A switch designed to disconnect power devices at no-load conditions

Load-break switch: A switch designed to interrupt load currents but not (greater) fault currents

Circuit breaker: A switch designed to interrupt fault currents

Automatic circuit reclosers: An overcurrent protective device that trips and recloses a preset number of times to clear transient faults or to isolate ...

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