WO2021150128A1 - Illuminated indicator device for mining cable connectors and a mining cable connector comprising said illuminated indicator device - Google Patents

Illuminated indicator device for mining cable connectors and a mining cable connector comprising said illuminated indicator device Download PDF

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Publication number
WO2021150128A1
WO2021150128A1 PCT/PE2020/050001 PE2020050001W WO2021150128A1 WO 2021150128 A1 WO2021150128 A1 WO 2021150128A1 PE 2020050001 W PE2020050001 W PE 2020050001W WO 2021150128 A1 WO2021150128 A1 WO 2021150128A1
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WO
WIPO (PCT)
Prior art keywords
pilot
indicator device
fuse
connector
mining cable
Prior art date
Application number
PCT/PE2020/050001
Other languages
Spanish (es)
French (fr)
Inventor
César Gustavo RIVERO PIZARRO
Original Assignee
Rivero Pizarro Cesar Gustavo
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 Rivero Pizarro Cesar Gustavo filed Critical Rivero Pizarro Cesar Gustavo
Priority to CA3134114A priority Critical patent/CA3134114A1/en
Priority to CN202080026476.6A priority patent/CN114930729A/en
Priority to PE2021001298A priority patent/PE20211678A1/en
Priority to PCT/PE2020/050001 priority patent/WO2021150128A1/en
Publication of WO2021150128A1 publication Critical patent/WO2021150128A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing

Definitions

  • the present invention is part of the technological sector of cable fault location devices, specifically an LED indicator light for mining cable connectors.
  • this background discloses a fixed location pilot-ground loop monitoring relay (for example, in a distribution substation), which injects a 1 KHz frequency time-varying signal; that is to say, it does not refer to a device that indicates the status of the pilot-ground loop, which is portable because it is mounted on a connector.
  • the previous relay fulfills the function of detecting when a fault occurs in the aforementioned loop, and of ordering the opening of a switch to cut off the power through the cable; while the indicator light of the proposed invention does not inject any type of signal to the loop, nor does it open any disconnection element.
  • this antecedent does not allow more than one indicator light to be connected in the same cable extension, so it does not allow knowing the state of the ground-pilot loop in the field, and even less does it facilitate fault location.
  • connection device or “mining cable connector” will be understood as any connection device between mining cables, such as couplers, splitters, among others, either for use in the field, pit or sinkhole.
  • ground and “G” are used to refer to an electrical connection to the system ground conductor
  • Pilot and “ground-check” and “GC” are used to refer to an electrical connection to the system pilot conductor.
  • This invention refers to a mining cable connector that includes an LED indicator light device, and to the LED indicator light device for the state of the earth-pilot loops suitable for its coupling in low and medium voltage mining cable connectors, where this luminous indicator device comprises a GC terminal connected with a fuse; where a fuse output node is connected with a transient voltage suppressor diode (TVS) and a current controller (driver), and the current controller is connected with a luminaire, specifically with a light-emitting diode (LED), then an output node of the LED luminaire connects with the TVS and the GND terminal; where the pilot and ground terminals of the circuit of the present invention are suitable for connecting to the pilot conductors (GC) and ground (GND) of the mining cable, by means of a connector and a furnace that is mechanically fastened to said connector.
  • this luminous indicator device comprises a GC terminal connected with a fuse; where a fuse output node is connected with a transient voltage suppressor diode (TVS) and a
  • a cable connects each terminal of the circuit to the oven; then, a cable covered with synthetic fiber braiding, preferably glass, is used to connect the oven to the pilot and ground connections of the connector.
  • Fiber braid coating is important Synthetic because it improves the tensile strength of the terminal-connection cable, which is relatively thin and may be subjected to some mechanical stress during the assembly and disassembly of the connector.
  • these connections are those that make direct electrical contact with the pilot and ground conductors of the trailing cable.
  • the DC signal coming from the pilot monitor relay to the circuit via the GC and GND terminals energizes the circuit.
  • the fuse has negligible resistance (short circuit) and the TVS has very high resistance (open circuit). So it can be said that all the power goes to the current driver and the LED.
  • the current controller includes a constant current source, which is implemented together with the active and passive components necessary to set a current such that the LED lights up considerably, but does not affect the normal operation of the pilot monitor relay.
  • the indicator light device is powered directly from the DC signal from a terminated pilot monitor relay, so it does not require any additional power source to operate.
  • the light indicating device has the benefit of being located directly in the field, in the path of the mining cable, as it is part of the connector. This makes it easy to locate wiring, connectors, and faults.
  • the TVS and fuse combination protect the current controller and LED fixture from unwanted external AC voltages.
  • the TVS is the one who generates enough current to make the fuse open.
  • the luminous indicator device uses a constant current source to energize the LED luminaire, this makes it easier for the luminous intensity of the LED to remain constant in the face of DC voltage variations that appear in the earth-pilot line.
  • Figure 1 A diagram of the LED luminous indicator device is shown with its connections between elements.
  • Figure 2 Three LED indicator devices are shown connected between a pilot ground loop monitoring relay circuit and its termination.
  • the fuse (5) can be of the delay type (time-delay) with a cut-off current of 100 mA; it can also be a PCB mount type.
  • the time delay fuse can be replaced by a normal one, or by a resettable fuse (PPTC - polymeric and positive temperature coefficient fuse).
  • the cut-off current could be changed to any other value, as long as the associated TVS (6) is capable of conducting said current when the defined AC voltage is present.
  • the TVS (6) can be bidirectional whose breakdown voltage V_br is at least the same value as the external voltage supported by the associated pilot monitor relay (1), for an indefinite duration of time.
  • the TVS (6) could be replaced by a varistor, as long as it is capable of carrying the cut-off current of the associated fuse when the defined AC voltage is present.
  • the current controller (driver) (7) uses a constant current source, together with the passive and active components necessary to configure it, known to a person skilled in the technical field.
  • the constant current source can be of the integrated circuit type, or implemented with discrete components. The current value to be configured will depend on the magnitude of DC current that the associated pilot monitor relay (1) injects into the earth-pilot loop.
  • the constant current source of 300 uA is configured for an injected current of 25 mA.
  • a DC-DC converter with constant current output can be used, which can deliver the same current as the constant current source.
  • the DC-DC converter must operate under electromagnetic conditions by being in close proximity to the power conductors of the cable and connector.
  • the light emitting diode (LED) (8) used is preferably of low current consumption, where the luminous intensity complies with being at least 500 mcd when the forward bias current is 2 mA.
  • the color of the LED should contrast with the color of the connector; for example, blue or green LEDs can be used if the connector is orange.
  • the present invention is suitable to be connected with a pilot monitor relay (1), although this relay is not directly part of the invention, it fulfills an important functional role for which it should be mentioned here.
  • This relay acts as the power supply and the ground-pilot loop status signal for the invention.
  • the relay must work with a termination (4) (Zener, normal diode, impedance, others), and must inject a DC current to the pilot loop.
  • the minimum voltage it must be able to deliver is 5 VDC, and the minimum current is 25 mA.
  • the monitor relay (1) fulfills two functions: power supply, and loop status signal. It is possible to replace the power supply function by any other means of power, such as batteries, a system connected to the power supply of the connector, or an energy harvesting / electromagnetic energy capture system.
  • This luminous indicator device (9) can be made available to the public previously installed in a connector for mining cables; Likewise, it could be presented as part of a set of connector sub-parts (aluminum hood and copper connections) for cases in which the customer requests to keep a connector that is already in place, but wishes to add the LED indicator device.
  • Figure 1 shows the elements of the light indicator device (9) and the connection of the light indicator device (9) with an earth-pilot relay circuit. It should be understood that the mining cable connector is arranged next to the indicator light device (9).
  • FIG. 2 shows an example of embodiment of the present invention, it is explained that when the earth-pilot loop is in good condition and the monitoring relay is on, all LED indicator devices (LED indicators) will be on. If a sectional / open / loss of continuity fault occurs on the section of cable labeled Fault 1, then all LEDs will turn off. On the other hand, if this type of fault occurred in the Fault 3 location, only LED indicator 3 would turn off, while indicators 1 and 2 would remain on. If a short circuit fault occurs between ground and pilot, all LEDs will turn off. Table 1 summarizes the status of each LED for the two possible types of fault in the loop and at the various locations.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

The present invention relates to a mining cable connector incorporating an illuminated LED indicator device, and to the illuminated LED device indicating the status of the pilot-earth loops, where said illuminated indicator device comprises a CG terminal connected to a fuse; where an output node of the fuse is connected to a transient voltage suppressor (TVS) diode and a driver, and the driver is connected to a lamp, specifically a light-emitting diode (LED); then an output node of the LED lamp is connected to the TVS and the GND terminal; where the pilot and earth terminals of the loop of the present invention are suited to be connected to the pilot (CG) and ground (GND) conductors of the mining cable by means of a connector and a terminal box mechanically held to said connector.

Description

DISPOSITIVO INDICADOR LUMINOSO PARA CONECTORES DE CABLE DE MINERÍA Y UN CONECTOR DE CABLES DE MINERÍA QUE COMPRENDE DICHO DISPOSITIVO INDICADOR LUMINOSO CAMPO TÉCNICO LIGHT INDICATOR DEVICE FOR MINING CABLE CONNECTORS AND A MINING CABLE CONNECTOR INCLUDING SUCH LIGHT INDICATOR DEVICE TECHNICAL FIELD
La presente invención se enmarca en el sector tecnológico de los dispositivos de localización de defectos en los cables, específicamente a un dispositivo indicador luminoso LED para conectores de cable de minería. The present invention is part of the technological sector of cable fault location devices, specifically an LED indicator light for mining cable connectors.
ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION
En el estado de la técnica existe el documento de patente US4228475A, publicado el 14 de octubre de 1980, y titulado “Sistema de monitoreo de tierra”, este antecedente describe un dispositivo que comprende relés, un supresor de voltaje transitorio, un diodo Zener, un filtro de paso de banda, un driver, un transformador, la producción de una señal de detección, una fuente de corriente, entre otros elementos y sirve para detectar la existencia y la conexión adecuada de los cables de tierra en un cable de energía eléctrica de un tipo comúnmente utilizado en un sitio de minería de superficie; establece un circuito conductivo completo entre el conductor de tierra, o los conductores, y el cable de verificación de tierra o piloto del cable. Sin embargo, este antecedente divulga un relé de monitoreo de lazo piloto-tierra de ubicación fija (por ejemplo, en una subestación de distribución), que inyecta una señal variante en el tiempo de 1 KHz de frecuencia; es decir, no se refiere a un dispositivo indicador luminoso del estado del lazo piloto-tierra, de disposición portátil al estar montado en un conector. El relé del antecedente cumple la función de detectar cuando ocurre una falla en el mencionado lazo, y de comandar la apertura de un interruptor para cortar la energía a través del cable; mientras que el indicador luminoso de la invención propuesta no inyecta ningún tipo de señal al lazo, ni apertura algún elemento de desconexión. Adicionalmente, este antecedente no permite conectar más de un indicador luminoso en una misma extensión de cable, por lo que no permite conocer el estado del lazo tierra-piloto en campo, ni menos aún facilita la localización de la falla. In the state of the art there is patent document US4228475A, published on October 14, 1980, and entitled "Ground monitoring system", this background describes a device that comprises relays, a transient voltage suppressor, a Zener diode, a band pass filter, a driver, a transformer, the production of a detection signal, a current source, among other elements and serves to detect the existence and proper connection of the ground cables in an electrical power cable of a type commonly used on a surface mining site; establishes a complete conductive circuit between the ground conductor, or conductors, and the cable's pilot or ground check wire. However, this background discloses a fixed location pilot-ground loop monitoring relay (for example, in a distribution substation), which injects a 1 KHz frequency time-varying signal; that is to say, it does not refer to a device that indicates the status of the pilot-ground loop, which is portable because it is mounted on a connector. The previous relay fulfills the function of detecting when a fault occurs in the aforementioned loop, and of ordering the opening of a switch to cut off the power through the cable; while the indicator light of the proposed invention does not inject any type of signal to the loop, nor does it open any disconnection element. Additionally, this antecedent does not allow more than one indicator light to be connected in the same cable extension, so it does not allow knowing the state of the ground-pilot loop in the field, and even less does it facilitate fault location.
Se aclara que, a lo largo del presente documento, se entenderá por “conector” o “conector de cables de minería” a cualquier dispositivo de conexión entre cables de minería, tal como couplers, cajas separadoras (splitters), entre otros, ya sea para su uso en campo, tajo o socavón. Asimismo, los términos “tierra”, “GND” y “G” se emplean para referirse a una conexión eléctrica al conductor tierra del sistema, y los términos “Piloto”, “ground-check” y “GC” se emplean para referirse a una conexión eléctrica al conductor piloto del sistema. It is clarified that, throughout this document, "connector" or "mining cable connector" will be understood as any connection device between mining cables, such as couplers, splitters, among others, either for use in the field, pit or sinkhole. Likewise, the terms "ground", "GND" and "G" are used to refer to an electrical connection to the system ground conductor, and the terms "Pilot", "ground-check" and "GC" are used to refer to an electrical connection to the system pilot conductor.
BREVE DESCRIPCIÓN DE LA INVENCIÓN Como solución a los problemas antes mencionados se desarrolló la presente invención. Esta invención está referida a un conector de cables de minería que incluye un dispositivo indicador luminoso LED, y al dispositivo indicador luminoso LED del estado de lazos tierra-piloto adecuado para su acople en conectores de cables de minería de baja y mediana tensión, donde este dispositivo indicador luminoso comprende un terminal GC conectado con un fusible; donde un nodo de salida del fusible se conecta con un diodo supresor de voltaje transitorio (TVS) y un controlador de corriente (driver), y el controlador de corriente se conecta con una luminaria, específicamente con un diodo emisor de luz (LED), luego un nodo de salida de la luminaria LED se conecta con el TVS y el terminal GND; donde los terminales piloto y tierra del circuito de la presente invención son adecuados para conectarse a los conductores piloto (GC) y tierra (GND) del cable de minería, mediante un conector y una hornera que está sujetada mecánicamente a dicho conector. Preferentemente, un cable conecta cada terminal del circuito a la hornera; luego, se utiliza un cable cubierto con trenzado de fibra sintética, preferiblemente de vidrio, para conectar la hornera a las acometidas piloto y tierra del conector. Es importante el recubrimiento de trenzado de fibra sintética pues mejora la resistencia a la tracción del cable bornera-acometida, el cual es relativamente delgado y podrá estar sometido a cierto estrés mecánico durante el ensamble y desensamble del conector. Finalmente, estas acometidas son las que hacen contacto eléctrico directo con los conductores piloto y tierra del cable de arrastre. BRIEF DESCRIPTION OF THE INVENTION As a solution to the aforementioned problems, the present invention was developed. This invention refers to a mining cable connector that includes an LED indicator light device, and to the LED indicator light device for the state of the earth-pilot loops suitable for its coupling in low and medium voltage mining cable connectors, where this luminous indicator device comprises a GC terminal connected with a fuse; where a fuse output node is connected with a transient voltage suppressor diode (TVS) and a current controller (driver), and the current controller is connected with a luminaire, specifically with a light-emitting diode (LED), then an output node of the LED luminaire connects with the TVS and the GND terminal; where the pilot and ground terminals of the circuit of the present invention are suitable for connecting to the pilot conductors (GC) and ground (GND) of the mining cable, by means of a connector and a furnace that is mechanically fastened to said connector. Preferably, a cable connects each terminal of the circuit to the oven; then, a cable covered with synthetic fiber braiding, preferably glass, is used to connect the oven to the pilot and ground connections of the connector. Fiber braid coating is important Synthetic because it improves the tensile strength of the terminal-connection cable, which is relatively thin and may be subjected to some mechanical stress during the assembly and disassembly of the connector. Finally, these connections are those that make direct electrical contact with the pilot and ground conductors of the trailing cable.
La señal DC que llega del relé monitor de piloto al circuito mediante los terminales GC y GND energiza al circuito. En funcionamiento normal, el fusible presenta una resistencia despreciable (cortocircuito) y el TVS, una resistencia muy alta (circuito abierto). Entonces, se puede decir que toda la energía llega al controlador de corriente y al LED. El controlador de corriente incluye una fuente de corriente constante, que se implementa junto con los componentes activos y pasivos necesarios para fijar una corriente tal que el LED se encienda considerablemente, pero que no afecte el normal funcionamiento del relé monitor de piloto. The DC signal coming from the pilot monitor relay to the circuit via the GC and GND terminals energizes the circuit. In normal operation, the fuse has negligible resistance (short circuit) and the TVS has very high resistance (open circuit). So it can be said that all the power goes to the current driver and the LED. The current controller includes a constant current source, which is implemented together with the active and passive components necessary to set a current such that the LED lights up considerably, but does not affect the normal operation of the pilot monitor relay.
Si se presentase un voltaje AC entre los terminales GC y GND del circuito y este fuese de magnitud suficiente para llevar al TVS a su estado de polarización, entonces el TVS pasará de su estado de baja conducción a uno de alta conducción. Esta corriente atravesará el fusible y hará que se abra (circuito abierto). Así, el voltaje AC no dañará al controlador de corriente ni a la luminaria LED. If an AC voltage is present between the GC and GND terminals of the circuit and this is of sufficient magnitude to bring the TVS to its polarized state, then the TVS will go from its low conduction state to a high conduction state. This current will flow through the fuse and cause it to open (open circuit). Thus, the AC voltage will not damage the current driver or the LED fixture.
La presente invención incluye los siguientes efectos técnicos: The present invention includes the following technical effects:
El dispositivo indicador luminoso se alimenta directamente de la señal DC de un relé monitor de piloto con terminación, por lo que no requiere de ninguna fuente de energía adicional para funcionar. The indicator light device is powered directly from the DC signal from a terminated pilot monitor relay, so it does not require any additional power source to operate.
El dispositivo indicador luminoso tiene el beneficio de ubicarse directamente en el campo, en el camino del cable minero, ya que forma parte del conector. Esto facilita la ubicación del cableado, los conectores y las fallas. La combinación de TVS y fusible protegen al controlador de corriente y a la luminaria LED de voltajes AC externos indeseados. El TVS es quien genera la corriente suficiente para hacer que el fusible se aperture. The light indicating device has the benefit of being located directly in the field, in the path of the mining cable, as it is part of the connector. This makes it easy to locate wiring, connectors, and faults. The TVS and fuse combination protect the current controller and LED fixture from unwanted external AC voltages. The TVS is the one who generates enough current to make the fuse open.
El dispositivo indicador luminoso utiliza una fuente de corriente constante para energizar a la luminaria LED, esto facilita que la intensidad luminosa del LED se mantenga constante frente a las variaciones de voltaje DC que aparecen en la línea tierra-piloto. The luminous indicator device uses a constant current source to energize the LED luminaire, this makes it easier for the luminous intensity of the LED to remain constant in the face of DC voltage variations that appear in the earth-pilot line.
BREVE DESCRIPCIÓN DE LAS FIGURAS BRIEF DESCRIPTION OF THE FIGURES
Para complementar la descripción de la invención y con objeto de facilitar su comprensión, se acompaña a la presente memoria descriptiva, como parte integrante de la misma, un juego de figuras en donde con carácter ilustrativo y no limitativo se ha representado la siguiente modalidad preferente de la invención: To complement the description of the invention and in order to facilitate its understanding, the present specification is attached, as an integral part thereof, to a set of figures in which, with an illustrative and non-limiting nature, the following preferred modality of the invention:
Figura 1 : Se muestra un diagrama del dispositivo indicador luminoso LED con sus conexiones entre elementos. Figure 1: A diagram of the LED luminous indicator device is shown with its connections between elements.
(1) Relé de monitoreo de lazo tierra-piloto, con terminación (1) Ground-pilot loop monitoring relay, terminated
(2) Conductor piloto / ground-check en el cable de arrastre minero (2) Pilot / ground-check conductor in mining tow cable
(3) Conductor tierra en el cable de arrastre minero (3) Earth conductor in the mining tow cable
(4) Terminación del relé de monitoreo (4) Monitoring relay termination
(5) Fusible de protección al indicador LED (5) LED indicator protection fuse
(6) TVS (6) TVS
(7) Driver para energizar el LED (7) Driver to power the LED
(8) LED (8) LED
(9) Dispositivo indicador luminoso LED (indicador LED) (9) LED indicator light device (LED indicator)
Figura 2: Se muestran tres dispositivos indicadores luminosos LED conectados entre un circuito de relé de monitoreo de lazo tierra piloto y su terminación. DESCRIPCIÓN DETALLADA DE LA INVENCIÓN Y/O MODALIDADES PREFERENTES De forma más específica, el fusible (5) puede ser del tipo de retardo (time- delay) con corriente de corte de 100 mA; asimismo, puede ser del tipo montaje en PCB. Sin embargo, puede reemplazarse el fusible de retardo por uno normal, o por un fusible reseteable (PPTC - fusible polimérico y de coeficiente de temperatura positivo). Podría cambiarse la corriente de corte a cualquier otro valor, siempre y cuando el TVS (6) asociado sea capaz de conducir dicha corriente al presentarse el voltaje AC definido. Figure 2: Three LED indicator devices are shown connected between a pilot ground loop monitoring relay circuit and its termination. DETAILED DESCRIPTION OF THE INVENTION AND / OR PREFERRED MODALITIES More specifically, the fuse (5) can be of the delay type (time-delay) with a cut-off current of 100 mA; it can also be a PCB mount type. However, the time delay fuse can be replaced by a normal one, or by a resettable fuse (PPTC - polymeric and positive temperature coefficient fuse). The cut-off current could be changed to any other value, as long as the associated TVS (6) is capable of conducting said current when the defined AC voltage is present.
El TVS (6) puede ser bidireccional cuyo voltaje de ruptura V_br sea de al menos el mismo valor que el voltaje externo que soporta el relé monitor de piloto (1) asociado, por una duración indefinida de tiempo. El TVS (6) se podría reemplazar por un varistor, siempre y cuando este sea capaz de conducir la corriente de corte del fusible asociado cuando se presenta el voltaje AC definido. El controlador de corriente (driver) (7) emplea una fuente de corriente constante, junto con los componentes pasivos y activos necesarios para configurarla conocidos por una persona versada en el campo técnico. La fuente de corriente constante puede ser del tipo circuito integrado, o implementada con componentes discretos. El valor de corriente a configurar dependerá de la magnitud de corriente DC que el relé monitor de piloto (1) asociado inyecta en el lazo tierra-piloto. Por ejemplo, para una corriente inyectada de 25 mA, se configura la fuente de corriente constante de 300 uA. Por otro lado, en vez de emplear una fuente de corriente constante, se puede usar un convertidor DC-DC con salida constante de corriente, que pueda entregar la misma corriente que la fuente de corriente constante. Además, el convertidor DC-DC debe funcionar bajo las condiciones electromagnéticas al estar en cercanía a los conductores de fuerza del cable y conector. El diodo emisor de luz (LED) (8) empleado es preferiblemente de bajo consumo de corriente, donde la intensidad luminosa cumple con ser de al menos 500 mcd cuando la corriente de polarización directa es de 2 mA. De preferencia, el color del LED debe contrastar con el color del conector; por ejemplo, se puede utilizar LED azul o verde si el conector es color naranja. The TVS (6) can be bidirectional whose breakdown voltage V_br is at least the same value as the external voltage supported by the associated pilot monitor relay (1), for an indefinite duration of time. The TVS (6) could be replaced by a varistor, as long as it is capable of carrying the cut-off current of the associated fuse when the defined AC voltage is present. The current controller (driver) (7) uses a constant current source, together with the passive and active components necessary to configure it, known to a person skilled in the technical field. The constant current source can be of the integrated circuit type, or implemented with discrete components. The current value to be configured will depend on the magnitude of DC current that the associated pilot monitor relay (1) injects into the earth-pilot loop. For example, for an injected current of 25 mA, the constant current source of 300 uA is configured. On the other hand, instead of using a constant current source, a DC-DC converter with constant current output can be used, which can deliver the same current as the constant current source. In addition, the DC-DC converter must operate under electromagnetic conditions by being in close proximity to the power conductors of the cable and connector. The light emitting diode (LED) (8) used is preferably of low current consumption, where the luminous intensity complies with being at least 500 mcd when the forward bias current is 2 mA. Preferably, the color of the LED should contrast with the color of the connector; for example, blue or green LEDs can be used if the connector is orange.
La presente invención es adecuada para conectarse con un relé monitor de piloto (1), si bien este relé no es directamente parte de la invención, cumple un rol funcional importante por lo que se debe mencionar aquí. Este relé funge de fuente de alimentación y de señal de estado lazo tierra-piloto para la invención. El relé debe funcionar con una terminación (4) (Zener, diodo normal, impedancia, otras), y debe inyectar una corriente DC al lazo piloto. El voltaje mínimo que debe poder entregar es de 5 VDC, y la corriente mínima, de 25 mA. El relé monitor (1) cumple dos funciones: fuente de alimentación, y señal de estado de lazo. Es posible reemplazar la función de fuente de alimentación por cualquier otro medio de alimentación, como pueden ser pilas/baterías, un sistema conectado a las acometidas de fuerza del conector, o un sistema de energy harvesting/captura de energía electromagnética. Este dispositivo indicador luminoso (9) puede disponerse al público previamente instalado en un conector para cables de minería; asimismo, podría presentarse formando parte de un conjunto de sub-piezas del conector (capucha de aluminio y acometidas de cobre) para casos en que el cliente solicita conservar un conector que ya tiene en instalación, pero desea adicionarle el dispositivo indicador luminoso LED. The present invention is suitable to be connected with a pilot monitor relay (1), although this relay is not directly part of the invention, it fulfills an important functional role for which it should be mentioned here. This relay acts as the power supply and the ground-pilot loop status signal for the invention. The relay must work with a termination (4) (Zener, normal diode, impedance, others), and must inject a DC current to the pilot loop. The minimum voltage it must be able to deliver is 5 VDC, and the minimum current is 25 mA. The monitor relay (1) fulfills two functions: power supply, and loop status signal. It is possible to replace the power supply function by any other means of power, such as batteries, a system connected to the power supply of the connector, or an energy harvesting / electromagnetic energy capture system. This luminous indicator device (9) can be made available to the public previously installed in a connector for mining cables; Likewise, it could be presented as part of a set of connector sub-parts (aluminum hood and copper connections) for cases in which the customer requests to keep a connector that is already in place, but wishes to add the LED indicator device.
En la figura 1 se observan los elementos del dispositivo indicador luminoso (9) y la conexión del dispositivo indicador luminoso (9) con un circuito de relé tierra-piloto. Se debe entender que el conector de cables de minería está dispuesto junto al dispositivo indicador luminoso (9). Figure 1 shows the elements of the light indicator device (9) and the connection of the light indicator device (9) with an earth-pilot relay circuit. It should be understood that the mining cable connector is arranged next to the indicator light device (9).
En la figura 2 se muestra un ejemplo de realización de la presente invención, se explica que cuando el lazo tierra-piloto se encuentra en buen estado y el relé de monitoreo está encendido, todos los dispositivos indicadores luminosos LED (indicadores LED) estarán encendidos. Si ocurriese una falla por seccionamiento/apertura/pérdida de continuidad en el tramo de cable denominado como Falla 1, entonces todos los indicadores LED se apagarán. En cambio, si este tipo de falla ocurriese en la ubicación Falla 3, se apagaría sólo el indicador LED 3, mientras que los indicadores 1 y 2 se mantendrían encendidos. Si ocurriese una falla por cortocircuito entre la tierra y el piloto, se apagarían todos los indicadores LED. La Tabla 1 resume el estado de cada indicador LED para los dos tipos de falla posibles en el lazo y en las distintas ubicaciones. Figure 2 shows an example of embodiment of the present invention, it is explained that when the earth-pilot loop is in good condition and the monitoring relay is on, all LED indicator devices (LED indicators) will be on. If a sectional / open / loss of continuity fault occurs on the section of cable labeled Fault 1, then all LEDs will turn off. On the other hand, if this type of fault occurred in the Fault 3 location, only LED indicator 3 would turn off, while indicators 1 and 2 would remain on. If a short circuit fault occurs between ground and pilot, all LEDs will turn off. Table 1 summarizes the status of each LED for the two possible types of fault in the loop and at the various locations.
Tabla 1. Estado de indicadores LED (Figura 2) - falla por Seccionamiento/Apertura/ Pérdida de continuidad En lazo tierra-piloto
Figure imgf000009_0001
Figure imgf000009_0002
Table 1. Status of LED indicators (Figure 2) - Fault by Sectionalizing / Opening / Loss of continuity In earth-pilot loop
Figure imgf000009_0001
Figure imgf000009_0002
Únicamente en el caso que la falla ocurra en la ubicación Falla 1 , o que la falla sea de cortocircuito entre tierra y piloto, es que se apagarán todos los LED. Finalmente, es así como se explica que al utilizar varios indicadores LED se facilita la localización de fallas en el lazo tierra-piloto. Only if the fault occurs at Fault 1 location, or the fault is a short circuit between ground and pilot, will all LEDs turn off. Finally, this is how it is explained that by using several LED indicators it is easier to locate faults in the earth-pilot loop.

Claims

REIVINDICACIONES
1.- Un dispositivo indicador luminoso del estado en un lazo tierra-piloto adecuado para conectores de cable de minería caracterizado por comprender un terminal piloto conectado con un fusible; donde un nodo de salida del fusible está conectado con un diodo supresor de voltaje transitorio y con un controlador de corriente; donde el controlador de corriente está conectado con un diodo emisor de luz; y donde un nodo de salida del diodo emisor de luz está conectado con el diodo supresor de voltaje y un terminal tierra. 1.- A luminous indicator device of the status in an earth-pilot loop suitable for mining cable connectors characterized by comprising a pilot terminal connected with a fuse; wherein an output node of the fuse is connected with a transient voltage suppressor diode and with a current controller; where the current controller is connected with a light emitting diode; and where an output node of the light emitting diode is connected with the voltage suppressor diode and a ground terminal.
2.- El dispositivo indicador luminoso de acuerdo con la reivindicación 1 caracterizado porque el fusible es del tipo de retardo con una corriente de corte de 100mA. 3.- El dispositivo indicador luminoso de acuerdo con la reivindicación 1 caracterizado porque el fusible es un fusible polimérico y de coeficiente de temperatura positivo. 2. The luminous indicator device according to claim 1, characterized in that the fuse is of the delay type with a cut-off current of 100mA. 3. The luminous indicator device according to claim 1, characterized in that the fuse is a polymeric fuse with a positive temperature coefficient.
4 El dispositivo indicador luminoso de acuerdo con la reivindicación 1 caracterizado porque el diodo supresor de voltaje es reemplazado por un varistor. The luminous indicator device according to claim 1 characterized in that the voltage suppressor diode is replaced by a varistor.
5.- El dispositivo indicador luminoso de acuerdo con la reivindicación 1 caracterizado porque el controlador de corriente emplea una fuente de corriente constante o emplea un convertidor DC-DC con salida constante de corriente, adecuado para entregar la misma corriente que la fuente de corriente constante. 5.- The luminous indicator device according to claim 1, characterized in that the current controller uses a constant current source or uses a DC-DC converter with constant current output, suitable to deliver the same current as the constant current source. .
7.- Un conector de cables de minería caracterizado por comprender una hornera dispuesta en dicho conector; donde en dicha hornera está conectado un indicador luminoso del estado en un lazo tierra-piloto; donde el dispositivo indicador luminoso comprende un terminal piloto conectado con un fusible; donde un nodo de salida del fusible está conectado con un diodo supresor de voltaje transitorio y con un controlador de corriente; donde el controlador de corriente está conectado con un diodo emisor de luz; y donde un nodo de salida del diodo emisor de luz está conectado con el diodo supresor de voltaje y un terminal tierra. 7. A mining cable connector characterized by comprising a furnace arranged in said connector; where in said oven a light indicator of the status is connected in an earth-pilot loop; wherein the luminous indicator device comprises a pilot terminal connected with a fuse; where an output node of the fuse is connected with a suppressor diode of transient voltage and with a current controller; where the current controller is connected with a light emitting diode; and where an output node of the light emitting diode is connected with the voltage suppressor diode and a ground terminal.
8.- El conector de cables de minería de acuerdo con la reivindicación 7, caracterizado porque la bornera está conectado a unas acometidas piloto y tierra del conector a través de un cable cubierto con trenzado de fibra sintética. 8. The mining cable connector according to claim 7, characterized in that the terminal block is connected to pilot connections and ground of the connector through a cable covered with synthetic fiber braiding.
PCT/PE2020/050001 2020-01-20 2020-01-20 Illuminated indicator device for mining cable connectors and a mining cable connector comprising said illuminated indicator device WO2021150128A1 (en)

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CA3134114A CA3134114A1 (en) 2020-01-20 2020-01-20 Illuminated indicator device for mining cable connectors and a mining cable connector comprising said illuminated indicator device
CN202080026476.6A CN114930729A (en) 2020-01-20 2020-01-20 Illuminated indicator device for a mining cable connector and mining cable connector comprising said illuminated indicator device
PE2021001298A PE20211678A1 (en) 2020-01-20 2020-01-20 LIGHT INDICATOR DEVICE FOR MINING CABLE CONNECTORS AND A MINING CABLE CONNECTOR INCLUDING SUCH LIGHT INDICATOR DEVICE
PCT/PE2020/050001 WO2021150128A1 (en) 2020-01-20 2020-01-20 Illuminated indicator device for mining cable connectors and a mining cable connector comprising said illuminated indicator device

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676739A (en) * 1971-09-07 1972-07-11 Gen Electric Mine power system ground continuity check circuit
US3728582A (en) * 1971-12-23 1973-04-17 Gulton Ind Inc Ground continuity monitoring system
US4228475A (en) * 1978-08-28 1980-10-14 Amf Incorporated Ground monitoring system
US4321643A (en) * 1980-04-04 1982-03-23 Amf Incorporated Ground monitoring system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208969200U (en) * 2018-07-18 2019-06-11 兖州煤业股份有限公司 A kind of monitor and coalcutter system of coalcutter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676739A (en) * 1971-09-07 1972-07-11 Gen Electric Mine power system ground continuity check circuit
US3728582A (en) * 1971-12-23 1973-04-17 Gulton Ind Inc Ground continuity monitoring system
US4228475A (en) * 1978-08-28 1980-10-14 Amf Incorporated Ground monitoring system
US4321643A (en) * 1980-04-04 1982-03-23 Amf Incorporated Ground monitoring system

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