A new method to diagnose faults for high voltage circuit breakers is presented in the paper based on the introduction of wavelet packet and characteristic entropy.

在详细介绍小波包与特征熵的基础上，将二者结合提出了一种诊断高压断路器机械故障的新方法，并给出了切实可行的诊断步骤和分析。

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The appearing and improving of intelligent type low-voltage circuit breakers enable short circuit breakdown protection for low-voltage power distribution network to be more reasonable.

低压智能型断路器的出现及完善，使低压配电网络的短路故障保护更趋合理。

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This paper outdoor distribution equipment and layout of the bus architecture, power transformers, high-voltage circuit breakers, switches and arrester and isolation transformer and so on.

室外配电装置选型主要包括中型配电装置、高型配电装置、半高型配电装置等。

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Networks are riddled with circuit breakers that prevent electricity from flowing backward to the substation when voltage drops--the moment when utilities need solar cells and basement battery packs to support the grid.

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