公开(公告)号：US3614533A

公开(公告)日：1971-10-19

申请号：US3905670

申请日：1970-05-20

申请人： RUCKER CO

发明人： DOUGLAS ELLWOOD S ,  WAHLGREN WALLACE W

IPC分类号： H02H1/04 ,  H02H3/347 ,  H02H3/16

CPC分类号： H02H1/04 ,  H02H3/347

摘要： Miniaturized ground fault detector and current interrupter in which fault signals are stored in the form of magnetic flux in an inductor core. The core has a low input impedance and is driven by a differential transformer having a small core and a singleturn secondary winding. Means is provided for reading the stored flux signals out of the inductor core and operating a circuit breaker in response thereto. Means is also provided for counting the number of signals readout of the core and delaying the operation of the circuit breaker until a predetermined number have been counted.

公开(公告)号：US3579038A

公开(公告)日：1971-05-18

申请号：US3579038D

申请日：1969-08-14

申请人： SQUARE D CO

发明人： BACKDERF ROBERT P ,  KANITZ DOUGLAS R

IPC分类号： H02H1/00 ,  H02H3/347 ,  H02H7/22 ,  H02H3/28 ,  H02H7/26

CPC分类号： H02H7/222 ,  H02H1/0015 ,  H02H3/347

摘要： A normally open relay and a normally closed relay responsive to fault currents in an electrical distribution system control the opening of a disconnect switch incapable of interrupting large fault currents. The contacts of the relays are connected in series in an energizing circuit for an electroresponsive operator of the disconnect switch. Upon occurrence of a small fault, such as a ground fault, the contact of the normally open relay closes after a short time delay to effect opening of the disconnect switch. Upon occurrence of a large fault, the contact of the normally open relay also closes as for a small fault, but the contact of the normally closed relay opens instantaneously to prevent opening of the disconnect switch.

公开(公告)号：US3427505A

公开(公告)日：1969-02-11

申请号：US3427505D

申请日：1967-01-17

申请人： UNINORM ANSTALT

发明人： BIEDERMANN SIEGFRIED

IPC分类号： H01H71/28 ,  H01H83/22 ,  H02H3/10 ,  H02H3/347 ,  H02H1/02

CPC分类号： H02H3/105 ,  H01H71/28 ,  H01H83/226 ,  H02H3/347

公开(公告)号：US3356939A

公开(公告)日：1967-12-05

申请号：US35473064

申请日：1964-03-25

申请人： FED PACIFIC ELECTRIC CO

发明人： STEVENSON ROBERT A

IPC分类号： H02H3/347

CPC分类号： H02H3/347

公开(公告)号：US11575255B2

公开(公告)日：2023-02-07

申请号：US17563765

申请日：2021-12-28

申请人： Hubbell Incorporated

发明人： Roy Itzler ,  Nicole Gay

IPC分类号： H02H3/32 ,  H02H3/10 ,  H02H3/38 ,  H02H3/34 ,  H02H3/347

摘要： A temporary power delivery system includes a power source, a booth stringer, and a portable GFCI device. The GFCI device is receives current from the power source by a first terminal and delivers current to the booth stringer by a second terminal. An electronic processor of the GFCI device compares a combined magnitude of current flowing through first and second phase conductors of the GFCI device to a magnitude of current flowing through a neutral conductor of the GFCI. The electronic processor also compares a first voltage between the first phase conductor and neutral conductor to a second voltage between the second phase conductor and neutral conductor. A circuit breaker of the GFCI device is opened if a difference between the combined magnitude of phase conductor current and neutral conductor current exceeds a first threshold or a difference between the first voltage and second voltage exceeds a second threshold.

公开(公告)号：US08873207B2

公开(公告)日：2014-10-28

申请号：US13605618

申请日：2012-09-06

申请人： Reinhold Dillig ,  Bernd Herrmann ,  Hubert Schierling ,  Benno Weis

发明人： Reinhold Dillig ,  Bernd Herrmann ,  Hubert Schierling ,  Benno Weis

IPC分类号： H02H9/08 ,  G01R31/14 ,  H02H3/16 ,  H02H3/347 ,  H01H83/02 ,  H02H7/10

CPC分类号： H02H3/162 ,  H01H83/02 ,  H02H3/347 ,  H02H7/10

摘要： A conventional ground fault interrupter in an arrangement with a frequency converter and electrical machines may be accidentally tripped due to operation-related leakage currents. This can be prevented by operating a ground fault interrupter for a frequency converter receiving a mains current in the following manner: receiving switching information about switching operations in the frequency converter, measuring a signal associated with a common mode current in a power line device which conducts the mains current to the frequency converter, determining, based on the switching information, an expected signal expected for the common mode current produced by the switching operations, identifying, based on the measured signal and the expected signal, a fault current, and interrupting the mains power depending on the identified fault current. A ground fault interrupter is hereby provided with an evaluation unit configured to carry out the method.

摘要翻译： 具有变频器和电机的布置中的常规接地故障断续器可能由于操作相关的泄漏电流而意外跳闸。 这可以通过以下列方式操作接收市电电流的变频器的接地故障中断器来防止：接收关于频率转换器中的开关操作的开关信息，测量与电力线装置中的共模电流相关联的信号， 到频率转换器的电源电流，基于开关信息确定由开关操作产生的共模电流所期望的期望信号，基于测量信号和期望信号识别故障电流，并且中断 主电源取决于识别的故障电流。 因此，接地故障中断器设置有用于执行该方法的评估单元。

公开(公告)号：US20050018369A1

公开(公告)日：2005-01-27

申请号：US10860387

申请日：2004-06-03

申请人： Ronald Bax ,  Rudy Rusali ,  Timothy King

发明人： Ronald Bax ,  Rudy Rusali ,  Timothy King

IPC分类号： H02H1/06 ,  H02H3/00 ,  H02H3/04 ,  H02H3/05 ,  H02H3/10 ,  H02H3/33 ,  H02H3/347

CPC分类号： H01H83/14 ,  H01H3/001 ,  H01H83/04 ,  H01H83/144 ,  H02H1/06 ,  H02H3/04 ,  H02H3/05 ,  H02H3/105 ,  H02H3/32 ,  H02H3/33 ,  H02H3/347 ,  H02H7/09

摘要： The aircraft applicable current imbalance detection and circuit interrupter interrupts an electrical circuit when a current imbalance is sensed. The current imbalance detection and circuit interrupter includes a housing, power supplies, a sensor system for sensing a current imbalance at the line side of the electrical circuit, a logic controller and a power controller including a power relay having contacts capable of surviving carry-break and make-carry-break types of ground fault conditions at anticipated current levels. At power up, the device performs a test to confirm that none of the relay contacts have failed in a closed position, and to check whether a switching FET which controls the relay coil has shorted.

摘要翻译： 当感测到电流不平衡时，飞机适用的电流不平衡检测和电路断路器中断电路。 电流不平衡检测和电路断路器包括壳体，电源，用于感测电路线路侧的电流不平衡的传感器系统，逻辑控制器和功率控制器，其包括具有能够存活携带断点的触点的功率继电器 以及预期目前水平的接地故障类型。 上电时，器件进行测试以确认没有继电器触点在闭合位置发生故障，并检查控制继电器线圈的开关FET是否短路。

公开(公告)号：US5809045A

公开(公告)日：1998-09-15

申请号：US713295

申请日：1996-09-13

申请人： Mark Gerard Adamiak ,  George Edmund Alexander ,  William James Premerlani ,  Emilie Thorbjorg Saulnier ,  Birsen Yazici

发明人： Mark Gerard Adamiak ,  George Edmund Alexander ,  William James Premerlani ,  Emilie Thorbjorg Saulnier ,  Birsen Yazici

IPC分类号： G01R19/25 ,  H02H3/05 ,  H02H3/28 ,  H02H3/347 ,  H02H3/38 ,  H02H3/40 ,  H02H7/045 ,  H02H7/26 ,  G06F11/34

CPC分类号： H02H7/263 ,  G01R19/25 ,  H02H3/28 ,  H02H3/40 ,  H02H3/05 ,  H02H7/045

摘要： A method of detecting faults on a power transmission line system includes simultaneously measuring phase current samples at each phase of each transmission terminal; calculating real and imaginary phaselets comprising partial sums of the phase current samples; for each phaselet, calculating a respective partial sum of squares of each phase current sample; calculating the sums of the real and imaginary phaselets over a variable size sliding sample window; calculating real and imaginary phasor components from the phaselets and a sum of the partial sums of the squares over the sample window; using the sums of the real and imaginary phaselets, the real and imaginary phasor components, and the sum of the partial sums of the squares to calculate a sum of squares of errors between the phase current samples and a fitted sine wave representative of the real and imaginary phasor components; using the sum of squares of errors to calculate a variance matrix defining an elliptical uncertainty region; determining whether a disturbance has occurred, and, if so, re-initializing the sample window; and determining whether a sum of current phasors from each terminal for a respective phase falls outside of the elliptical uncertainty region for the respective phase.

公开(公告)号：US5786971A

公开(公告)日：1998-07-28

申请号：US899129

申请日：1997-07-23

申请人： David Chan ,  Paul Gernhardt

发明人： David Chan ,  Paul Gernhardt

IPC分类号： H02H3/33 ,  H02H3/347 ,  H02H3/00

CPC分类号： H02H3/347 ,  H02H3/334

摘要： A ground fault protection circuit for plural loads connected across a power source with plural branches which can be used where the loads are unbalanced. Each branch includes a ground fault circuit interrupter device that has a common line for the electronics of the GFCI separate from the neutral line from the power source to the load where the common lines for the electronics for the ground circuit interrupter devices in each branch are connected to a common point. The ground fault protection circuit employs plural ground fault circuit interrupter devices and eliminates nuisance tripping. The common line for the electronics for a GFCI is routed through the core of the current sensing transformer of the GFCI. The separate neutral line for the electronics, connecting the common lines for the electronics for plural GFCI devices and routing the common lines for the GFCI electronics through the core of the transformer of each GFCI, eliminate improper GFCI operation due to unbalanced loading. The ground fault protection circuit may be used for a three phase power source.

公开(公告)号：US4685022A

公开(公告)日：1987-08-04

申请号：US733008

申请日：1985-05-10

申请人： E. Lane Nichols, III ,  William P. Hooper ,  Kenneth J. Leynse

发明人： E. Lane Nichols, III ,  William P. Hooper ,  Kenneth J. Leynse

IPC分类号： H02H1/06 ,  H02H3/05 ,  H02H3/16 ,  H02H3/33 ,  H02H3/347

CPC分类号： H02H3/33 ,  H02H3/05 ,  H02H1/06 ,  H02H3/335

摘要： A ground-fault circuit interrupter is provided with an additional current-sensing element that responds to a net value of current through the power wires in an ac circuit. The winding may be wound on a ferromagnetic core of its own or it may be placed as a separate winding on a core that is used to sense imbalance in a GFCI. In the latter case the extra winding must be insulated electrically from the main sense winding. The additional coil is connected to a rectifying diode and a capacitor, so that an imbalance of current in the power wires charges the capacitor. The voltage thus developed across the capacitor is used to operate the tripping mechanism of the ground-fault circuit interrupter. The fault-powered signal thus attained in the added winding will enable the GFCI to operate despite the existence of heavy fault currents that reduce the operating voltage to the rest of the GFCI to a level that would otherwise prevent its operation.

摘要翻译： 接地故障电路断续器具有额外的电流感测元件，其响应于通过交流电路中的电力线的电流的净值。 绕组可以缠绕在其自身的铁磁芯上，或者可以作为单独的绕组放置在用于感测GFCI中的不平衡的芯上。 在后一种情况下，额外的绕组必须与主感测绕组电绝缘。 附加线圈连接到整流二极管和电容器，使得电源线中的电流不平衡对电容器充电。 电容器上产生的电压用于操作接地故障断路器的跳闸机构。 因此，在添加的绕组中获得的故障供电信号将使GFCI能够运行，尽管存在严重的故障电流，从而将GFCI的其余部分的工作电压降低到否则将阻止其运行的水平。