公开(公告)号：WO1990006519A1

公开(公告)日：1990-06-14

申请号：PCT/US1989005384

申请日：1989-11-28

Applicant: SOUTHERN CALIFORNIA EDISON COMPANY

Inventor： SOUTHERN CALIFORNIA EDISON COMPANY ,  LOPETRONE, Juan, P. ,  VALDES, Oliver

IPC: G01R15/02

CPC classification number: G01R31/346 ,  G01R15/202 ,  G01R27/18 ,  G01R31/025 ,  H02H3/16

Abstract: A current sensing device particularly for rotor ground fault detection in a highly inductive field is able to sense and identify the location of low order fault current when the load current in conductors is on the order of at least 1,000 amperes. Laminated strips of magnetic material are flexible to be located ideally about the conductors to maximize the sensitivity signal and minimize the effect of electromagnetic radiation. The current sensor includes three sets of laminations, the central laminations being for magnetization sensing, the inner laminations being for magnetic filtering, and outer laminations being for magnetic shield. Magnetic separation exists between each lamination set. Electrical insulation is located about the inner and outer sets.

Abstract translation: 特别是用于高感应场中的转子接地故障检测的电流感测装置能够感测并识别当导体中的负载电流为至少1000安培数量级时低阶故障电流的位置。 磁性材料的层压条可以理想地位于导体周围，以最大化灵敏度信号并最小化电磁辐射的影响。 电流传感器包括三组叠片，中央叠片用于磁化感应，内层叠用于磁过滤，外层叠用于磁屏蔽。 每个层压组之间存在磁分离。 电绝缘围绕内外套。

公开(公告)号：WO1994029733A1

公开(公告)日：1994-12-22

申请号：PCT/AT1993000102

申请日：1993-06-16

Applicant: WINKLER, Franz

IPC: G01R15/02

CPC classification number: G01R15/18

Abstract: In a process for the contactless determination of electrical measurements, e.g., d.c. or a.c. voltages or currents, powers or resistances in a conductor (1), at least two spaced coil systems (6) are positioned in the electromagnetic field of the conductor (1) and the coils (6) and/or an electrically conductive component (3) in the neighbourhood of the coils (6) is caused to vibrate mechanically and periodically to determine d.c. voltage and/or currents. It is thus possible contactlessly to determine such electrical measurements in an electric conductor which cannot be completely surrounded.

Abstract translation: 在电气测量变量，如的非接触测定方法 DC或AC电压或电流，性能或电阻器，在导体（1）的至少两个间隔开的线圈系统（6）中所述导体的电磁场定位（1），其中所述用于直流电压的确定和/或 电流线圈（6）和/或在线圈（6）的附近的导电部件（3）被放入周期机械振荡。 这实现了在电导体中，不能将其全部被夹持的非接触或这样的电测量变量的无接触判定。

公开(公告)号：WO1994019700A1

公开(公告)日：1994-09-01

申请号：PCT/EP1994000401

申请日：1994-02-11

Applicant: SIEMENS AKTIENGESELLSCHAFT ,  MARQUARDT, Rainer

Inventor： SIEMENS AKTIENGESELLSCHAFT

IPC: G01R15/02

CPC classification number: G01R15/14 ,  G10L25/06 ,  G10L2019/0013

Abstract: The invention relates to an arrangement (60) for detecting the actual value of a measurement at high potential and its use in a high-powered current converter (2). According to the invention, this arrangement (60) consists of a measurement amplifier (80) with an upstream measuring range adapter (78) and an auxiliary power supply unit (84), which is connected on one side to the measurement amplifier (80) and on the other to the measuring range adapter (78). This provides an arrangement (60) for detecting the actual value of a measurement at high potential which no longer has to separate the potential itself so that the space needed for it is substantially reduced and, owing to its simplified construction, costs can be reduced and the reliability of the entire system improved.

公开(公告)号：WO1990011529A1

公开(公告)日：1990-10-04

申请号：PCT/FI1990000076

申请日：1990-03-23

Applicant: ABB STRÖMBERG KOJEET OY ,  SOLANTI, Petri ,  TENHUNEN, Hannu ,  KIISKINEN, Esko ,  SUUTARI, Jukka ,  SIIKONEN, Martti

Inventor： ABB STRÖMBERG KOJEET OY

IPC: G01R15/02

CPC classification number: G01R15/202

Abstract: The present invention concerns an apparatus and method for measuring the electric current in current conductors (82) in conditions of high interference in order to control, for instance, an overcurrent trip relay. The apparatus comprises a Hall-effect sensor (81) placed very close to each current conductor (82) and a voltage-measuring element connected to each Hall sensor (81) so that the measurement signal from the element can be used for computing the current level. In accordance with the invention, each current conductor (82) is enclosed by an essentially U-shaped (84a), or alternatively, comb-shaped (84b) core opening toward the Hall sensor and enclosing said sensor, which core is fabricated of a ferromagnetic material capable of concentrating the magnetic flux and additionally operating as an interference filter. With the help of the invention electric current can be accurately measured in conditions of interference.

Abstract translation: 本发明涉及一种用于在高干扰条件下测量电流导体（82）中的电流以便控制例如过电流跳闸继电器的装置和方法。 该装置包括非常接近每个电流导体（82）的霍尔效应传感器（81）和连接到每个霍尔传感器（81）的电压测量元件，使得来自该元件的测量信号可用于计算电流 水平。 根据本发明，每个电流导体（82）被基本上为U形（84a）或者替代地，梳状（84b）的芯开口朝向霍尔传感器封闭，并封闭所述传感器，该芯由 能够集中磁通量并另外作为干涉滤光器工作的铁磁材料。 借助本发明，可以在干扰条件下精确地测量电流。

公开(公告)号：WO1994027157A1

公开(公告)日：1994-11-24

申请号：PCT/FI1994000184

申请日：1994-05-10

Applicant: ABB STRÖMBERG KOJEET OY ,  KUOSA, Jussi ,  NÅHLS, Mikael

Inventor： ABB STRÖMBERG KOJEET OY

IPC: G01R15/02

CPC classification number: H01F38/30 ,  G01R15/202

Abstract: The invention is related to a current transducer based on the measurement of magnetic flux density and a method for calibrating the same. The transducer comprises a frame structure (5, 8), adapted to said frame structure (5, 8), an essentially ring-shaped magnetic circuit (2) having the annular shape gapped to form an air gap (4) and concentrate the magnetic flux to the air gap (4), said ring-shaped magnetic circuit (2) incorporating an aperture (10) through which the current conductor (6, 7) to be measured can be routed, a Hall-effect device (1) insertable in said air gap, and an electromagnetic shield structure (3) surrounding the frame structure to the end of preventing external interference fields from affecting the Hall-effect device. According to the invention the electromagnetic shield structure (3) is made of a material essentially similar to that of the magnetic circuit (2), and both the magnetic circuit (2) and the body structure (5) are so shaped as to be capable of accommodating either a straight current conductor (6), or alternatively, a winding structure (7) with which current measurement sensitivity can be multiplied.

Abstract translation: 本发明涉及一种基于磁通密度测量的电流传感器及其校准方法。 所述换能器包括适于所述框架结构（5,8）的框架结构（5,8），基本环形磁路（2），其环形形状被间隙形成，以形成气隙（4）并将磁 通向气隙（4）的通量，所述环形磁路（2）包括孔（10），可测量的电流导体（6,7）可通过该孔径，霍尔效应装置（1）可插入 在所述气隙中，以及围绕框架结构的电磁屏蔽结构（3），以防止外部干扰场影响霍尔效应装置。 根据本发明，电磁屏蔽结构（3）由基本上类似于磁路（2）的材料制成，并且磁路（2）和体结构（5）都被成形为能够 容纳可以乘以电流测量灵敏度的直流导体（6）或可选的线圈结构（7）。

公开(公告)号：WO1992013278A1

公开(公告)日：1992-08-06

申请号：PCT/EP1992000114

申请日：1992-01-21

Applicant: ABB PATENT GMBH ,  SCHWAB, Adolf

Inventor： ABB PATENT GMBH

IPC: G01R15/02

CPC classification number: G01R15/22 ,  G01R15/142 ,  G01R15/16

Abstract: The description relates to a measuring converter at high-voltage potential is provided for a high voltage switchboard plant whose measurement signals are taken from high-voltage to earth potential, the measuring converter being inside the contour of the conductor (11). Inside the hollow conductor (11) there is a transmission circuit which converts the electric measurement signals into light signals which are taken to earth potential via light-guides (27).

公开(公告)号：WO1988007204A1

公开(公告)日：1988-09-22

申请号：PCT/US1988000659

申请日：1988-03-07

Applicant: GRUMMAN AEROSPACE CORPORATION

Inventor： GRUMMAN AEROSPACE CORPORATION ,  LANGONE, Joseph, A. ,  UGENTI, Michael

IPC: G01R15/02

CPC classification number: G01R31/31924

Abstract: A testing circuit is capable of testing digital circuits, such as gates (10), in logic 1, logic 0 and Hi-Z conditions. To accomplish this end two comparators (38, 44) are connected to the output (32) of the digital circuit (10) undergoing test while second inputs (40, 48) of both comparators are respectively connected to different reference voltages (32, 36). By comparing the voltage level at the output of the digital circuit undergoing test with programmable reference voltages, unique truth tables are established for an operative digital circuit undergoing test.

公开(公告)号：WO1986003843A1

公开(公告)日：1986-07-03

申请号：PCT/FR1985000343

申请日：1985-11-29

Applicant: THOMSON-CGR ,  AUBERT, Guy

Inventor： THOMSON-CGR

IPC: G01R15/02

CPC classification number: G01R15/148

Abstract: MNR shunt for measuring a high current. According to the invention, a coiled magnet (11) is mounted in series in the circuit (10) wherein the current to be measured circulates, the temperature of the magnet is stabilized and the magnetic field is measured at the center of the magnet by means of a MNR probe (16).

Abstract translation: MNR分流器用于测量高电流。 根据本发明，线圈磁体（11）串联安装在电路（10）中，其中待测量的电流循环，磁体的温度稳定，并且通过装置在磁体的中心测量磁场 的MNR探针（16）。

公开(公告)号：WO1994023305A1

公开(公告)日：1994-10-13

申请号：PCT/FR1994000351

申请日：1994-03-29

Applicant: MECAGIS ,  BERNA, Michel ,  COLOMBEL, Luc ,  RAHOLIJAONA, Rouelle

Inventor： MECAGIS

IPC: G01R15/02

CPC classification number: G01R15/185 ,  G01R15/20

Abstract: An electric current measuring device including at least one magnetic flux sensor (1) in the air gap (2) of a ring-shaped core (3) with at least one conductor (4) passing therethrough and carrying the current to be measured, a compensating winding (5) wound around the core (3), and a measuring resistor (6) connected in series with the compensating winding. Said magnetic core is a piece of solid material and the device further comprises a compensating winding supply current control circuit (U1A, Q1, Q2, U1B, Q3, Q4) operative regardless of the current direction and controlled by the magnetic flux sensor output signal. Futhermore, the number of turns of the compensating winding is selected so as to be compatible with the current to be measured, the maximum available supply voltage and the measured, the maximum available supply voltage and the measurement range of the measuring resistor of the device.

Abstract translation: 一种电流测量装置，包括在环形芯（3）的气隙（2）中的至少一个磁通量传感器（1），其中至少一个导体（4）穿过其中并承载待测量的电流， 缠绕在芯体（3）上的补偿绕组（5）以及与补偿绕组串联连接的测量电阻器（6）。 所述磁芯是一块固体材料，该装置还包括补偿绕组供电电流控制电路（U1A，Q1，Q2，U1B，Q3，Q4），无论电流方向如何，均由磁通量传感器输出信号控制。 此外，补偿绕组的匝数被选择为与装置的测量电流，最大可用电源电压和测量的最大可用电源电压和测量电阻的测量范围兼容。

公开(公告)号：WO1992013277A1

公开(公告)日：1992-08-06

申请号：PCT/EP1992000113

申请日：1992-01-21

Applicant: ABB PATENT GMBH ,  SCHWAB, Adolf

Inventor： ABB PATENT GMBH

IPC: G01R15/02

CPC classification number: G01R15/146 ,  G01R15/183

Abstract: Disclosed is a current transformer, mounted in at least one power line (11), for the measurement of transient, rapidly varying short-circuit currents, etc., in particular in gas-insulated, metal-encapsulated switchgear. The current transformer has a length of thin-walled tubing (22) which conducts transient short-circuit currents occurring in the power line (11) and whose external diameter is equal to the external diameter of the power line (11). The voltage drop along a line at the surface of the length of tubing (22) is used for measurement purposes. The voltage drop along this line is a measure of the transient short-circuit current.