WO2020013826A1 - Ensemble commutateur de test ayant un circuit électronique - Google Patents

Ensemble commutateur de test ayant un circuit électronique Download PDF

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Publication number
WO2020013826A1
WO2020013826A1 PCT/US2018/041785 US2018041785W WO2020013826A1 WO 2020013826 A1 WO2020013826 A1 WO 2020013826A1 US 2018041785 W US2018041785 W US 2018041785W WO 2020013826 A1 WO2020013826 A1 WO 2020013826A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit board
test switch
switch assembly
electronic test
current
Prior art date
Application number
PCT/US2018/041785
Other languages
English (en)
Inventor
Malbin Jose Mendoza
Prerak N. Shah
Todd Alan Gentile
Douglas A. Voda
Harshavardhan M. Karandikar
Richard Lindo
Dennis F. Batovsky
Original Assignee
Abb Schweiz Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Abb Schweiz Ag filed Critical Abb Schweiz Ag
Priority to PCT/US2018/041785 priority Critical patent/WO2020013826A1/fr
Publication of WO2020013826A1 publication Critical patent/WO2020013826A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly

Definitions

  • the present disclosure relates to a test switch assembly that is electrically coupled with an electronic module, to monitor, sense, detect, analyze, store, and/or transmit an electrical signal provided by an electrical power system, or an external current or voltage source.
  • Protective relays are commonly used in electric utility applications to detect various possible problems in an electrical power system. Such relays protect a wide variety of equipment and are used in power systems, which also include circuit breakers. The primary function of a relay is to provide trip signals to circuit breakers
  • transformers and potential transformers are employed to obtain a signal in high current and/or high potential applications.
  • Transformers reduce the magnitude of the current or voltage, and then feed the signal to the relays, meters and instalments at a much lower level for detection.
  • the relay terminals may then be electrically connected to test switch terminals or poles.
  • Test switches can be associated with one or more relays.
  • test switch provides this necessary ' short circuit or bypass feature. If this short circuit does not occur, the associated current transformer may be damaged and the safety of nearby personnel could be jeopardized. Voltage measurements can also be made directly on test switches, without disturbing existing connections
  • Terminals of the relay are connected to the transformers/sensors through a test switch, which includes connectors or terminals.
  • Each test switch assembly can be associated with one or more relays.
  • Test switches are designed with a housing that supports individual switches, also known as‘"poles”, and the rear terminals. The individual switches on the test switch assembly can be opened for the purposes of testing. In this manner, the test switch disconnects the protective relay from the sensors for the purposes of calibration and/or replacement.
  • test switch assemblies are the means by which protective relays are taken out of service or isolated.
  • Test switches and test plugs have all the features necessary for applications involving the safe measurement and i solation of individual currents, voltages, and digital input/output (“I/O”) signals to facilitate testing of substation instrumentation and protection devices.
  • I/O digital input/output
  • Exemplary embodiments include unique systems, methods, techniques and apparatuses for monitoring the operating condition of an industrial installation system having a plurality of pieces of equipment, devices, installations, and components. Further embodiments, forms, objects, features, advantages, aspects and benefits of the disclosure shall become apparent from the following description and drawings.
  • an electronic test switch assembly for selectively opening and closing an electrical connection between a protective relay and either conventional CT’s and PTs, current and voltage sensors or digital I/O ’ s
  • the electronic test switch assembly includes a plurality of individual switches, each including a blade movable between an open and a closed position, wherein the blade in a closed position conducts one of the voltage or current output through the switch.
  • the electronic test switch assembly also includes a plurality of signal interface connectors or terminals located at the rear, wherein the plurality of signal interface connectors is operatively connected to the plurality of the individual switches.
  • a circuit board assembly is electrically connected to the plurality of signal interface connectors and to the plurality of individual switches, wherein the circuit board assembly includes a circuit configured to process current and the voltage signals.
  • the circuit board or boards contain intelligent electronics configured to sense, detect, identify, monitor and/or store current and voltage information. This information, in different embodiments, is then sent to remote displays, personal computers (“PC’s”), or relays, through wires or wireless communication, or can change the status of onboard light emitting diodes (“LED’s”) or other illumination devices located in the test switch housing.
  • PC personal computers
  • LED onboard light emitting diodes
  • the signals processed as described herein can be further utilized to detect fault, and provide alarm and/or for issuing trip commands to circuit breakers based on programmed settings.
  • FIG. 1 is a front perspective view of an electronic test switch assembly including a plurality of individual switches.
  • FIG. 2 is a rear perspective view of an electronic test switch assembly including plurality of modular connectors.
  • FIG. 3 is an exploded rear perspective view of an electronic test switch assembly including a plurality of modular connectors and a circuit board.
  • FIGS. 4A-4C are perspective and cross-sectional view's of an electronic test switch assembly illustrating a circuit board located within the housing of the test switch assembly.
  • FIG. 5 is a rear perspective view of an electronic test switch assembly including plurality of rear connectors.
  • FIG. 6 is a cross-sectional view of an electronic test switch assembly illustrating a first circuit board and a second circuit board located within the housing of the test switch assembly.
  • FIG. 7 is an exploded rear perspective view of an electronic test switch assembly including a plurality of modular connectors and a first circuit board and a second circuit board.
  • FIG. 8 is an elevational view of a printed circuit board.
  • FIG. 9 is a schematic diagram of one embodiment of a test switch assembly coupled to a source of power.
  • FIG. 10 is a schematic diagram of another embodiment of a test switch assembly coupled to a source of power.
  • FIG. 1 illustrates a front perspective view of an electronic test switch assembly 10 including a plurality of individual switches 12.
  • the assembly 10 includes a front panel 14, configured to locate each of the plurality of individual switches 12 in a row extending from an end 16 to an end 18 of the assembly 10.
  • the construction of the test switch 12 is understood by those skilled in the art. and includes a handle 20 coupled to a shorting blade 22. In the illustrated position, each of the test switches 12 is in a closed position and the shorting blade 22 engages a top connector 23, or jaw. As the handle 20A is rotated downwardly, as illustrated, a shorting tab 24 moves to the illustrated location.
  • FIG. 2 is a rear perspective view of the electronic test switch assembly 10 including a rear cover 28, or rear panel, configured to support a plurality of interface connectors 30. Each one of the interface connectors 30 extends through an aperture 31 (see FIG. 3) defined in the rear cover 28 The rear cover 28 is operatively connected to an intermediate cover 32, which is operatively connected to the main housing 14. Each of the switches 12 is operatively connected to a top terminal 34 and a bottom terminal 36 The terminals 34 and 36 make electrical connections to the switch as understood by those skilled in the art. Terminals 34A and 36A are connected to test switch 12A of FIG. 1 and connectors 34B and 36B are connected to the test switch 12B of FIG. 1.
  • Each of the terminals 34 and 36 is located in one of a plurality of recesses 40 defined by sidewalls 42
  • the sidewalls 42 provide a barrier between adjacent connectors 34 and 36.
  • the main housing 14 includes a plurality of recesses 40 that are disposed along a rear side 44 and along the length of the main housingM.
  • each of the terminals 34 and 36 is a screw-type terminal to which an electrical lead can be connected.
  • the terminals 34 and 36 are a point of connection to the switch and only provide a direct connection to the switch.
  • Each of the interface connectors 30, however, is operatively connected to a circuit board assembly 46 of FIG. 3 to which the interface connectors 30 are electrically coupled.
  • the circuit board assembly 46 is located between the rear cover 28 and the intermediate cover 32.
  • the circuit board assembly 46 includes a printed circuit board 48 that mechanically supports each of the interface connectors 30 as well as electrical and electronic components, which are coupled to conductive pad or tracks as understood by those skilled the art.
  • the printed circuit board 48 board also includes a plurality of holes, each of which is configured to receive a signal interconnect 50 that extends through the printed circuit board 48 and into a plurality of channels 52 included as a part of the intermediate cover 32.
  • Each of the signal interconnects 50 includes a terminating end 54 and a shaft 56.
  • the shaft 56 extends through the channel 52 and is guided by the channel 52 toward the appropriate electrical connections of a respective switch.
  • the electrical coupling made by the signal interconnects in different embodiments, is made by a standard off-the-shelf screw or a custom-made screw that would enables a variety of electrical connections to be made (screw type, spade, banana jack, etc.).
  • the signal interconnects are made of a low impedance or a low resistance material, such as nickel, to provide adequate signal transmission.
  • FIGS. 4A, 4B, and 4C is a different views of the test switch assembly 10 illustrating the circuit board assembly 46 located within the complete housing of the test switch assembly 10.
  • the signal interconnect 50 is a screw having as the terminating end 54 a screw head, and as the shaft 56, a threaded portion configured to fixedly engage a threaded mount 60.
  • the threaded mount 58 is fixedly coupled to the switch 12 and makes an electrical connection to the appropriate connectors 23 or 26.
  • a sleeve 60 includes a channel through which the threaded mount 58 and the shaft 56 extend and in which the shaft 56 engages the threaded mount 60.
  • Each of the signal interconnects 50, the threaded mount 58, and the sleeve 60, are electrically conductive. Consequently, any current passing through the switch 12 is conducted along the signal interconnect 50 to the printed circuit board 48, wirich includes an electrical contact connecting the shaft 56 to circuit components including the interface connector 30.
  • the intermediate cover 32 and front panel 14 are not shown for ease of illustration.
  • FIG. 4B illustrates a perspective cross-section of one of the switches 12 of FIG.
  • FIG. 4A including the signal interconnects 50 and the interface connector 30.
  • interface connector 30 includes terminals 61 which are configured to connect to the printed circuit board 48.
  • FIG. 4C illustrated a plan sectional view of the configuration of FIG.
  • FIG. 5 is a rear perspective view of another embodiment of the test switch assembly 10 including a plurality of rear terminals 62.
  • each of the plurality of rear terminals 62 is located within a recess 64 defined by walls 66 of a rear housing 68
  • the connectors are screw-type connectors configured to receive an electrical lead.
  • the rear housing 68 is disposed adjacently to an intermediate cover 70, which is in turn disposed adjacently to the main housing 14, which includes the plurality of switches 12.
  • the main housing 14 is configured similarly to the main housing 14 of FIGS. 1 and 3.
  • the rear terminals 62 are individual wire connections, which are configured to connect to an electronic testing or analysis device having wired connections. In this embodiment, the rear terminals act as interface connectors to provide for signal transmission between the assembly ten and the electronic device.
  • FIG. 5 includes a first circuit board assembly 72 and a second circuit board assembly 74, each of which are electrically coupled to a plurality of signal interconnect 76.
  • the signal interconnect 76 make an electrical connection between the rear terminals 62, circuits located on the first circuit board assembly 72, and circuits located on the second circuit board assembly 74.
  • the signal interconnects 76 include an end 80 coupled to rear terminal 62 and a shaft 82 which extends from the end 80 to an end 84.
  • the rear terminal 62 includes a conductive end 86 which contacts the circuit of the first circuit board 72 to make an electrical connection.
  • the shaft 82 also includes a first shoulder 88, which conductively engages the circuit of the second circuit board assembly 74.
  • a second shoulder 90 is defined by the shaft 82.
  • FIG 7 illustrates an exploded rear perspective view of the test switch assembly 10 including the plurality of rear terminals 62.
  • each of the plurality of rear terminals 62 are shown spaced fro the recesses 64 defined by the rear housing 68.
  • the rear housing 68 is disposed adjacently to an intermediate cover 70, which is in turn disposed adjacently to the main housing 14 and which includes the plurality of switches 12.
  • a circuit board module 92 includes the first circuit board assembly 72 and the second circuit board assembly 74 which are coupled by the signal interconnect 76 as described above.
  • the rear housing 68 when coupled to the main housing 14, covers each of the first and second circuit board assemblies 72 and 74, such that the circuitry located thereon is electrically accessible by the connectors as well as by an external connector received by a first port 94 and a second port. 96.
  • each of the first and second ports 94 and 96 are appropriately located to enable electrical access to each of the first and the second circuit board assemblies 72 and 74.
  • the first port 94 provides an electrical connection to the first circuit board assembly 72 and an appropriately configured first external connector.
  • the second port 96 in this one embodiment, provides for an electrical connection to the second board assembly 74 for an appropriately configured second external connector.
  • the first and second ports include a high definition multimedia interface (HDMI) port and a universal serial bus (USB) port.
  • HDMI high definition multimedia interface
  • USB universal serial bus
  • the first and second ports 94 and 96 are not, however, limited to these types of connectors and other connectors are possible.
  • the intermediate cover 70 is similarly configured as the intermediate cover 32 of FIG. 3.
  • Each of the signal interconnects 76 extend through the channels 98 and is guided by the channels 98 toward the appropriate electrical connections of a respective switch.
  • the main housing 14 is configured as previously described.
  • FIG. 8 is an e!evational view of one embodiment of a printed circuit board 100 as configured for one or both of the circuit board assembly 46, the first circuit board assembly 72, and the second circuit board assembly 74.
  • the printed circuit board 100 includes a plurality of etched connectors 102, each of which includes a generally circular aperture 104 having a size configured to receive a shaft of the signal interconnects.
  • a conductive contact ring 106 surrounds the circular aperture 104 and is configured to interface with the terminating end 54 of the shaft 56 or one of the shoulders 88 and 90 of the signal interconnect 76.
  • Additional apertures 108 are located on the printed circuit board 100 to accept leads of the various devices, components, circuits, integrated circuit chips, and connectors, which are arranged in the circuit located on the printed circuit board. Etched circuit paths to connect the leads are not shown, but are included as understood by those skilled in the art.
  • the circuit board assemblies provide additional capabilities not currently found in known purely mechanical test switches that merely transmit or mechanically interrupt an electrical circuit connection.
  • the circuit board assembly electrically routes connections through the switch blades to an RJ45 connectors to facilitate electrical connections to sensors, relays, and test equipment.
  • the circuit board assembly includes“intelligent electronics” that sense, detect, monitor, analyze and store electrical signals and output the characteristics of the electrical signals to standalone displays, computers, or similar terminals “Intelligent electronics” include electronic circuits and/or devices that process data to make a decision.
  • Intelligent electronics include electronic circuits and/or devices that process data to make a decision.
  • sophisticated electronic circuity and software is provided to enable the test assembly to detect currents and voltages, record fault conditions, and detect open circuits.
  • the present disclosure provides an electronic test switch assembly that is simple to install, provides a low cost solution, and is retrofittable.
  • the configuration of the circuit board including advanced circuitry is customizable as a function of the devices located on the circuit board assembly through the use of modular circuit components or programmable functions using processors and software.
  • FIG. 9 is a schematic diagram of one embodiment of an electronic test switch assembly coupled to a power source 110.
  • the power source 110 in this embodiment, is a polyphase electric power source generating alternating current as three phases, here identified as A, B, and C. Each phase is carried by a current carrying conductor and the characteristic of each phase is determined or identified by a potential transformer 1 12. The current carried by each conductor is determined by a current transformer 114. The output of each of the transformers 112 and 1 14 is provided to an electronic test switch assembly 116 including a plurality of individual switches 118 as previously described. An electronic circuit system module 120 and an electronic circuit module 122 are illustrated and are included in the housing of the test switch assembly 116.
  • the electronic circuit modules 120 and 122 are configured as a single circuit board assembly as shown in FIG. 3. In another embodiment, the electronic circuit modules 120 and 122 are configured as a two separate circuit board assemblies as shown in FIG. 7. In other embodiments, the number of circuit boards is not limited to one or to two.
  • the electronic circuit board modules include, in different embodiments, simple point-to-point connections between poles of the switches 118 to various connectors including, but not limited to, an RMS (registered jack) connector, an USB (universal serial bus) connector, and RS232 (standard or non-standard) connector, a BNC (Bayonet Neill-Concelman) connector, a banana jack connector, and an RCA jack connector.
  • the circuitry located on the printed circuit boards includes additional features including circuitry to detect, sense, monitor, analyze, and/or redistribute, electrical currents and voltages that could be continuous or transient.
  • circuitry to collect store, analyze, or identify the sensed values provides the values as information to, for instance, a remote display, a storage device, status LED’s mounted on the circuit board, or a computer, through wired and/or wireless methods.
  • the circuitry includes, but is not limited to, discrete devices, integrated devices, integrated circuity, control circuity, including a processor such as a microprocessor, and memory.
  • the sophisticated electronics can be designed for any numbers of poles. While the disclosed embodiments use 10 or 12 poles, other designs include 2 to 14 poles or more poles, or combinations thereof.
  • the module 122 provides the sensed and identified values to an electronic device 124, having a display 126.
  • the connection to the electronic device 124 is one of a wireless and wired connection.
  • the electronic device is a mobile electronic device including, but not limited to, a mobile phone, a laptop computer, and a tablet computer.
  • the display 126 in different embodiments, is configured to display the sensed voltage or current or the states of each of the switches 118 as being an open state or a closed state.
  • the device is one or more of a data collector or concentrator, a remote terminal unit (RTU), a personal computer, or similar devices
  • the device 124 is one or more LEDs having illuminated and non-illuminated states configured to provide status information.
  • the data collector collects data from various potential transformers, current transformers and sensors.
  • audible indicators configured to indicate that an unwanted condition has occurred.
  • the device 124 include visual indicators, audible indicators, and a combination of both visual indi cators and audible indicators
  • a plurality of relays 127 are coupled to outputs of the test switch assembly.
  • the relays are protective relays and include in one or more embodiments, electromechanical relays, solid state relays, microprocessor based relays, or digital relays.
  • the switches D through I are shorting switches, which provides a protective function when the switches are positioned in one state or another state, as understood by those skilled in the art.
  • the electronic device 124 is a visual indicator, such as light emitting diode, physically coupled to the test switch assembly, displaying a light in one of two states. For instance, the color of the light indicates of the open state or closed state of the switch.
  • FIG. 10 is a schematic diagram of another embodiment of a test switch assembly coupled to a source of power 1 10.
  • the power source 1 10 provides alternating current as three phases, sensed by the potential sensor 112 and the current sensed by a current sensor 114.
  • a test switch assembly 130 is coupled to a sensor based relay 131.
  • the test switch assembly 130 includes a plurality of switches 132, each of which is a simple mechanical switch having an open state and a closed state, but not a shorting state.
  • the sensors are known as integral capacitive voltage sensors to allow for voltage measurement. These types of sensors have a Low Energy Analog (LEA) output, which provides a LEA input to the interface connectors. Such signals are much weaker than those provided by the potential or current transformers of FIG. 9. In other embodiments, other types of sensors having an LEA output signal are contemplated.
  • the type of interface connector is selected depending on the type of sensor. For instance, in one embodiment when using an LEA output type of sensor, an RJ45 interface connector is used

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

La présente invention concerne un ensemble commutateur de test couplé électriquement à un module électronique. Le module électronique est conçu avec un ensemble de circuits intelligent sophistiqué qui facilite la transmission et/ou la détection de courants et/ou de tensions entre un relais de protection et des transformateurs de courant ou de tension. Dans un mode de réalisation, le commutateur de test électronique capte, détecte, surveille, analyse et/ou stocke des signaux électriques et émet ces informations à des dispositifs d'affichage autonomes, des ordinateurs, des RTU ou des dispositifs similaires, par l'intermédiaire de connexions câblées ou sans fil. Le module électronique permet également au commutateur de test d'accepter des connecteurs électriques tels que des RMS, USB, RCA, et/ou BNC, entre autres.
PCT/US2018/041785 2018-07-12 2018-07-12 Ensemble commutateur de test ayant un circuit électronique WO2020013826A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2018/041785 WO2020013826A1 (fr) 2018-07-12 2018-07-12 Ensemble commutateur de test ayant un circuit électronique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2018/041785 WO2020013826A1 (fr) 2018-07-12 2018-07-12 Ensemble commutateur de test ayant un circuit électronique

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WO2020013826A1 true WO2020013826A1 (fr) 2020-01-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114578216A (zh) * 2022-04-30 2022-06-03 南昌耀德精密五金有限公司 一种芯片测试用导电装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080180195A1 (en) * 2006-12-25 2008-07-31 Fuji Electric Fa Components & Systems Co., Ltd. Earth leakage circuit breaker
US20110028031A1 (en) * 2009-07-29 2011-02-03 Abb Technology Ag Modular test plug
US20130120090A1 (en) * 2010-02-23 2013-05-16 Abb Technology Ag Protective switch with status detection
CN104467182A (zh) * 2014-12-05 2015-03-25 国家电网公司 一种站控层设备不停电遥控系统及方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080180195A1 (en) * 2006-12-25 2008-07-31 Fuji Electric Fa Components & Systems Co., Ltd. Earth leakage circuit breaker
US20110028031A1 (en) * 2009-07-29 2011-02-03 Abb Technology Ag Modular test plug
US20130120090A1 (en) * 2010-02-23 2013-05-16 Abb Technology Ag Protective switch with status detection
CN104467182A (zh) * 2014-12-05 2015-03-25 国家电网公司 一种站控层设备不停电遥控系统及方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114578216A (zh) * 2022-04-30 2022-06-03 南昌耀德精密五金有限公司 一种芯片测试用导电装置
CN114578216B (zh) * 2022-04-30 2022-07-15 南昌耀德精密五金有限公司 一种芯片测试用导电装置

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