Subsea pressure compensation arrangement

    公开(公告)号:US10041507B2

    公开(公告)日:2018-08-07

    申请号:US14723665

    申请日:2015-05-28

    Abstract: A subsea pressure compensation arrangement is disclosed as having a vessel filled with insulating fluid, and a pressure compensator for compensating pressure variations of the insulating fluid. The arrangement can include a fluid connection pipe for fluid communication between the vessel and the pressure compensator, wherein the fluid connection pipe is connected to a bottom wall of the pressure compensator. A pipe opening arranged at an end of the fluid connection pipe extends above a level of the bottom wall of the pressure compensator.

    Detection of islanding condition in electricity network

    公开(公告)号:US10031168B2

    公开(公告)日:2018-07-24

    申请号:US14671390

    申请日:2015-03-27

    Abstract: A method for single-phase islanding detection in a three-phase electricity network, can include supplying power into a three-phase electricity network (EN) by a power supply assembly (PSA), the electricity network (EN) having a network voltage, and providing a stimulus signal into a positive sequence electric quantity of the electricity network, the positive sequence electric quantity being current, power or a derived quantity thereof. A magnitude and/or a rate of change of an indicative element of a negative sequence component of the network voltage is monitored, a frequency domain of the indicative element including a frequency corresponding to the stimulus signal. A single phase islanding condition is detected in the electricity network (EN) if the magnitude and/or rate of change of the indicative element exceeds a predetermined limit value.

    Electrical switch ganging system and method

    公开(公告)号:US09947488B2

    公开(公告)日:2018-04-17

    申请号:US15137752

    申请日:2016-04-25

    CPC classification number: H01H9/26 H01H9/28 H01H9/283 H01H31/04 H01H2009/265

    Abstract: A fastener is provided for ganging or joining two or more switch handles to one another. The fastener includes a head at one end and an elongated shank extending from the head. The shank includes a threaded portion adjacent the head that threadingly engages one of the switch handles. The shank extends longitudinally from the threaded portion through the threadingly engaged switch handle and through one or more additional switch handles to gang the switch handles to one another.

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