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    Electrical switching apparatus with electronic trip unit
    1.
    发明授权
    Electrical switching apparatus with electronic trip unit 有权

    公开(公告)号：US09728348B2

    公开(公告)日：2017-08-08

    申请号：US14976619

    申请日：2015-12-21

    Applicant: EATON CORPORATION

    Inventor： Xin Zhou ,  Frank Joseph Stifter, Jr. ,  Gerald Zheng ,  Brian Scott Jansto ,  Theodore James Miller

    IPC: H01H9/02 ,  H01H7/06 ,  H01H50/36

    CPC classification number: H01H9/0271 ,  H01H7/06 ,  H01H50/36 ,  H01H71/0228 ,  H01H71/125 ,  H01H71/2463

    Abstract: An electrical switching apparatus includes a housing, a line terminal, a load terminal, separable contacts disposed on a conductive path between the line terminal and the load terminal, an operating mechanism structured to open and close said separable contacts, said operating mechanism including a trip bar, and an electronic trip unit. The electrical switching apparatus also includes a trip actuator assembly including an actuator housing coupled to said housing, an actuator coupled to said actuator housing, and a connector structured to electrically connect the actuator to an electronic trip unit. The electrical switching apparatus further includes a current transformer assembly including a rod-shaped conductor electrically coupled to the load terminal and a current transformer disposed around the rod-shaped conductor, wherein the electronic trip unit is structured to electrically control actuation of the actuator.

    ELECTRONIC TRIP UNITS POWERED BY CURRENT TRANSFORMERS AND CIRCUIT BREAKERS COMPRISING THE SAME
    2.
    发明申请
    ELECTRONIC TRIP UNITS POWERED BY CURRENT TRANSFORMERS AND CIRCUIT BREAKERS COMPRISING THE SAME 有权
    由电流互感器供电的电子牵引单元及包括其的断路器

    公开(公告)号：US20160276115A1

    公开(公告)日：2016-09-22

    申请号：US14663890

    申请日：2015-03-20

    Applicant: Eaton Corporation

    Inventor： Gerald Zheng ,  Xin Zhou ,  James Leo Lagree ,  Theodore James Miller ,  Bruce Wu ,  Sui Ouyang

    IPC: H01H9/54 ,  H01H37/32

    CPC classification number: H01H9/54 ,  H01H37/32 ,  H01H71/123 ,  H01H71/125 ,  H01H83/20 ,  H01H2011/0068 ,  H02H1/0007 ,  H02H1/046 ,  H02H3/08 ,  H02H5/044

    Abstract: A circuit breaker includes a set of separable contacts moveable between a closed position and an open position, an operating mechanism configured to open the set of contacts, a conductor coupled to the set of contacts, a current transformer coupled to the conductor, and a trip circuit coupled to the operating mechanism and to the current transformer and configured to cause the operating mechanism to open the set of contacts when a current through the conductor exceeds a current threshold that is greater than a saturation threshold of the current transformer. The trip circuit is further configured to vary the current threshold during an interval following a closure of the set of the contacts and to provide a fixed current threshold thereafter.

    Abstract translation: 断路器包括一组在可关闭位置和打开位置之间移动的可分离触点，操作机构，其构造成打开所述触点组，连接到所述触点组的导体，耦合到所述导体的电流互感器，以及跳闸 耦合到所述操作机构和所述电流互感器并且被配置为当通过所述导体的电流超过大于所述电流互感器的饱和阈值的电流阈值时，使所述操作机构打开所述触点组。 跳闸电路还被配置为在该组触点闭合之后的间隔期间改变电流阈值，并且此后提供固定的电流阈值。

    Controlled power-up scheme for an electronic trip unit, and circuit interrupter employing same
    6.
    发明授权
    Controlled power-up scheme for an electronic trip unit, and circuit interrupter employing same 有权

    公开(公告)号：US10193325B2

    公开(公告)日：2019-01-29

    申请号：US15624795

    申请日：2017-06-16

    Applicant: EATON CORPORATION

    Inventor： Theodore James Miller

    IPC: H02H3/087 ,  H02H3/08 ,  H02M3/04 ,  H02M1/36 ,  H02H1/06 ,  H02H1/00 ,  B60L3/04

    Abstract: A power supply circuit for a trip unit of a circuit interrupter includes a current transformer, a startup circuit receiving a regulated voltage and a DC/DC converter. The startup circuit is structured to: (i) burden the current transformer with an impedance approximating the trip unit and cause the DC/DC converter to enter the shutdown mode when the regulated voltage is below a predetermined value, (ii) remove the burden and cause the DC/DC converter to exit the shutdown mode and provide power to the trip unit responsive to the regulated voltage reaching the predetermined value, and (iii) remove the burden and cause the DC/DC converter to exit the shutdown mode and provide power to the trip unit responsive to a rate of change of the regulated voltage being at least a predetermined level.

    Wide range current monitoring system and method for electronic trip units
    10.
    发明授权
    Wide range current monitoring system and method for electronic trip units 有权

    公开(公告)号：US09716379B2

    公开(公告)日：2017-07-25

    申请号：US14840272

    申请日：2015-08-31

    Applicant: EATON CORPORATION

    Inventor： Theodore James Miller ,  Daniel A. Hosko ,  George Gao

    IPC: H02H3/00 ,  H02H3/08 ,  G01R15/00 ,  H01H83/00 ,  H02H3/44 ,  H02H1/00

    CPC classification number: H02H3/08 ,  G01R15/00 ,  H01H71/123 ,  H01H83/00 ,  H02H1/0046 ,  H02H3/44

    Abstract: A circuit interrupter that includes a passive integration channel structured to receive an output signal from a di/dt current sensor and generate a first signal output based on the output signal, and an active integration channel structured to receive the output signal from the di/dt current sensor and generate a second signal output based on the output signal that is proportional to the primary current received by the di/dt current sensor. Circuit protection functionality is provided based on the first signal output responsive to the primary current being determined to be greater than a threshold level, current metering and circuit protection functionality is provided based on the second signal output responsive to the primary current being determined to be less than or equal to the threshold level, and a seed current value is provided to the active integrator based on the first signal output.

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