AU2014224084B2 - Electrical control and protection device - Google Patents

Electrical control and protection device Download PDF

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Publication number
AU2014224084B2
AU2014224084B2 AU2014224084A AU2014224084A AU2014224084B2 AU 2014224084 B2 AU2014224084 B2 AU 2014224084B2 AU 2014224084 A AU2014224084 A AU 2014224084A AU 2014224084 A AU2014224084 A AU 2014224084A AU 2014224084 B2 AU2014224084 B2 AU 2014224084B2
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Australia
Prior art keywords
current
conductor
electric
electrical
processing means
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AU2014224084A1 (en
Inventor
Zakaria Belhaja
Simon Tian
Clément Zeller
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H02H1/0015—Using arc detectors
    • 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
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/06—Arrangements for supplying operative power
    • 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
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • 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
    • H02H3/006—Calibration or setting of parameters
    • 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
    • H02H3/08—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 responsive to excess current
    • H02H3/10—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 responsive to excess current additionally responsive to some other abnormal electrical conditions
    • H02H3/105—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 responsive to excess current additionally responsive to some other abnormal electrical conditions responsive to excess current and fault current to earth
    • 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
    • H02H3/26—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 responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—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 responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/34—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 responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
    • H02H3/347—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 responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system using summation current transformers

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

Electrical control and protection device The invention relates to an electrical control and protection device (10) of a set (2, 3) of electrical conductor(s), comprising: - means for measuring the voltage or current (17, 18) in at least one conductor; - processing means (12), suitable for detecting an electric arc in the conductors based on measurements done by said measuring means and, if an electric arc is detected, generating an activation signal (TRIP) and transmitting it to an electric switching device (14) suitable for stopping the flow of the electric current in at least said conductor; said processing means being suitable for further detecting, based at least on some of said voltage or current measurements, at least one malfunction from among a short circuit, an electric current overload, an overvoltage, an undervoltage and a residual current relative to at least said conductor. Figure 1 ijid PROCESSING -Enery 24 deteckcn LUd arc detedon 3 sh:tII.i mdr~~ OLAGNOSTIC I FIG.2 Id residual current AUATO detecion

Description

The invention relates to an electrical control and protection device (10) of a set (2, 3) of electrical conductor(s), comprising:
- means for measuring the voltage or current (17, 18) in at least one conductor;
- processing means (12), suitable for detecting an electric arc in the conductors based on measurements done by said measuring means and, if an electric arc is detected, generating an activation signal (TRIP) and transmitting it to an electric switching device (14) suitable for stopping the flow of the electric current in at least said conductor;
said processing means being suitable for further detecting, based at least on some of said voltage or current measurements, at least one malfunction from among a short circuit, an electric current overload, an overvoltage, an undervoltage and a residual current relative to at least said conductor.
Figure 1
2014224084 11 Sep 2014
Figure AU2014224084B2_D0001
Figure AU2014224084B2_D0002
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2014224084 07 Aug 2018
Electrical control and protection device
The present invention relates to the field of electrical control and protection devices suitable for being positioned in an electrical installation comprising a set of electrical conductor(s), said device comprising:
- means for measuring the voltage and/or current in at least one conductor of said set of conductor(s);
- processing means, suitable for detecting an electric arc in the electrical installation based at least on measurements done by said measuring means and, if an electric arc is detected, generating an activation signal and transmitting said activation signal to an electric switching device suitable for stopping the flow of the electric current in at least said conductor of said set of electric conductors in response to the reception of said detection signal.
Such devices, also called AFDD (Arc Fault Detection Device), are used on the residential market to ensure protection against electrical fires caused by serial or parallel arcs. They are for example positioned in the electrical panels of the residences to be protected.
In these devices, the means for measuring the voltage and/or current are used to measure current or voltage values that are next processed by the processing means in order to determine the presence or absence of signatures of an electric arc fault.
The present invention aims to propose an electrical control and protection device advantageously using the measurements done to detect the presence of electric arcs, to provide increased protection for the electrical installation.
To that end, according to a first aspect, the invention proposes an electrical control and protection device suitable for being positioned in an electrical installation comprising a set of electrical conductor(s), said device comprising:
- means for measuring the voltage and/or current and at least one conductor of said set of conductor(s); and
- processing means, suitable for detecting an electric arc in the electrical installation based at least on measurements done by said measuring means and, if an electric arc is detected, generating an activation signal and transmitting said activation signal to an electric switching device suitable for stopping the flow of the electric current in at least said conductor of said set of electric conductors in response to the reception of said detection signal, wherein the processing means are suitable for further detecting, based at least on some of said voltage and/or current measurements in the conductor done by said
2014224084 07 Aug 2018 measuring means, at least one malfunction from among a short circuit, an electric current overload, an overvoltage, an undervoltage and a residual current relative to at least said conductor of said set of electrical conductors, wherein if said malfunction is detected, the processing means are further 5 suitable for generating an activation signal and transmitting said activation signal to an electric switching device suitable for stopping the flow of the electric current in at least the conductor of said set of electric conductors in response to the reception of said detection signal, and wherein the processing means are suitable, following the detection of a 10 malfunction, for generating and transmitting a diagnostic signal comprising information characterizing the nature and source of the malfunction, and wherein the device further comprises primary means for supplying the electricity coming from the electrical installation to power the electric arc detector and comprising secondary means for supplying electricity further suitable for storing said electricity, said secondary electricity supply means being suitable for powering the processing module selectively when, following the transmission of an activation signal, the power supply of the primary means by the installation is stopped, wherein the secondary electricity supply means are sized to power the processing module, selectively, following the transmission of an activation signal by the electric arc detector, and until transmission of the diagnostic signal.
Such an electrical control and protection device thus advantageously pools the measurements done to detect electric arcs and makes it possible to protect the electrical installation against additional electrical malfunctions.
“Comprises/comprising” when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.
In embodiments, the electrical control and protection device according to the invention further includes one or more of the following features:
- it further comprises an electric switching device suitable for stopping the flow of electric current in at least said conductor of said set of electrical conductors in response to the reception of said activation signal generated by the processing means;
- the processing means are suitable for determining the value of a parameter based at least on measurements done by said measuring means, and detecting a malfunction based on the comparison between an activation threshold and a variable representative of said determined value;
2a
2014224084 07 Aug 2018 said processing means further being suitable for comparing said value representative of said determined value and an alert threshold, separate from said activation threshold, and generating an alert signal based on said comparison;
- the processing means are suitable, once the malfunction is detected, for only 5 transmitting the activation signal following the detection of said malfunction after the transmission of the diagnostic signal;
- the processing means are suitable for determining the energy consumed at the measuring point of the device in an electrical panel, which corresponds to various respective energy-consuming elements in the circuit downstream from the device;
- the determination, by the processing means, of the consumed energy comprises computing actual current values and/or actual voltage values, and/or the active or reactive power, and/or the power factor and/or the consumed energy;
[continued on page 3]
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- it comprises a temperature sensor, the processing means being suitable for correcting the voltage or current measurements of the measuring means based on temperature(s) measured by the temperature sensor.
These features and advantages of the invention will appear upon reading the following description, provided solely as an example, and done in reference to the appended drawings, in which:
- figure 1 shows an electrical installation in which an electrical control and protection device according to one embodiment of the invention is installed;
- figure 2 is a view of functional sub-modules of a processing module of an electrical control and protection device in one embodiment of the invention;
figure 3 shows an electrical embodiment of the invention; control and protection device in another
figure 4 shows an electrical embodiment of the invention; control and protection device in another
figure 5 shows an electrical embodiment of the invention; control and protection device in another
figure 6 shows an electrical control and protection device in another
embodiment of the invention.
In figure 1, a portion of an electrical installation 1, for example residential or in the service building, is shown. It includes two current conducting cables, for example a phase conductor 2 and a neutral conductor 3.
An electrical control and protection device 10 is connected to the electrical installation 1, for example within an electrical panel. The electrical control and protection device 10 includes a measuring unit 11, a processing module 12, a man-machine interface 13, a circuit breaker 14, a connection 15 to a main electrical power supply, and secondary electricity supply means 16.
The measuring assembly 11 for example includes:
- a voltage sensor 17, suitable for periodically measuring the current value of the voltage U between the phase conductor 2 and the neutral conductor 3;
- a set of two current sensors 18, suitable for periodically measuring the current value of the current I flowing in the phase conductor 2, and further for measuring the residual current ld, i.e., the difference in intensity between the current in the phase conductor 2 and the current in the neutral conductor 3.
2014224084 11 Sep 2014
The values periodically measured by the sensors 17-18 for the voltage U, the phase current I and the residual current ld are delivered by the measuring assembly 11 to the processing module 12.
The frequency of the measurements by the sensors 17, 18 is for example 5 comprised in the range [1 kHz, 10 kHz],
The processing module 12 comprises a microcomputer 20 and a memory 21.
The memory 21 in particular comprises software instructions which, when executed on the microcomputer 20, carry out the functions described below in reference to figure 2 and performed by the processing module 12.
The processing model 12 is in fact suitable for performing a certain number of processing operations based on the measurement values provided to it as input.
The processing module 12 is further suitable for generating alarm or diagnostic signals based on these processing operations and transmitting them to the man-machine interface 13 and/or generating activation signals and transmitting them to the circuit breaker 14.
According to the embodiments, the man-machine interface 13 can be integrated into the electrical control and protection device 10 or remote from the device 10. The connection between the device 10 and the man-machine interface may be of the wired or wireless type. In embodiments, part of the man-machine interface 13 is integrated into the device 10 (for example, the device 10 includes a display screen and means for generating a sound and/or light alarm) and another part of the man-machine interface 13 is remote (for example, this other part comprises a workstation with an alarm and event log, and maintenance functions, in particular if applicable to remotely control the opening or closing of the switches 142 and 143).
The circuit breaker 14 comprises two switches 142 and 143 and is suitable for driving the opening, and optionally the closing, of the switches 142 and 143 based on the activation signals received from the processing module 12.
The switch 142 is positioned on the phase conductor 2 and the switch 143 is positioned on the neutral conductor 3. When the switch 142 is in the closed position, electric current flows in the phase conductor 2, and when the switch 142 is in the open position, the flow of the electric current in the phase conductor 2 is stopped.
Similarly, when the switch 143 is in the closed position, an electric current flows in the neutral conductor 3, and when the switch 143 is in the open position, the flow of electric current in the neutral conductor 3 is stopped.
2014224084 11 Sep 2014
According to the embodiments, the circuit breaker 14 is integrated into the electrical control and protection device 10, or remote from the device 10. The connection between the device 10 and the circuit breaker 14 may be of the wired or wireless type.
The connection 15 to the electrical power supply 1 is suitable for powering the 5 electrical control and protection device 10 using the voltage U coming from the electrical installation 1.
The secondary electricity supply means 16 are suitable for storing energy and at least partially powering the device 10 when the electrical installation 1 is no longer providing electricity, as will be described hereinafter.
The functions carried out by the sub-modules of the processing module 12, in cooperation with the other modules of the detector 10, in one embodiment of the invention, are described below in reference to figure 2.
The considered processing module 12 includes an electric arc detection submodule 20, an undervoltage and overvoltage detection sub-module 21, a short circuit and 15 overload detection sub-module 22, and a residual current detection sub-module 23.
The considered processing module 12 further includes an activation sub-module 30, an alarm sub-module 31 and a diagnostic sub-module 32.
The electric arc detection sub-module 20 is suitable for processing the current I, voltage U and residual current ld measurements, regularly provided by the sensors 17, 18 30 so as to determine the values of one (or more) arc detection parameter(s), based on the current I, voltage U and residual current ld.
The arc detection method may be varied, for example similar to those described in WO 00/08663 or FR 2,802,721.
The undervoltage and overvoltage detection sub-module 21 is suitable for 25 processing the voltage measurements U regularly supplied by the sensor 17 so as to determine the values of one (or more) voltage malfunction detection parameter(s), based on the measured voltage U.
These processed voltage values may be in actual value, average value or peak value, the computation method being well known by those skilled in the art.
The short-circuit detection sub-module 22 is suitable for processing the current measurements I regularly supplied by the sensor 18 so as to determine the values of one (or more) short circuit and overload detection parameter(s), based on that measured current I.
These processed current values may be in actual value, average value or peak value, the computation method being well known by those skilled in the art.
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The residual current detection sub-module 23 is suitable for processing the current measurements ld regularly supplied by the sensor 18 so as to determine the values of one (or more) residual current detection parameter(s), based on that measured current ld.
These processed current values may be in actual value, average value or peak 5 value, the computation method being well known by those skilled in the art.
The values successively determined for the arc detection, undervoltage, overvoltage, short circuit, overload and residual current parameters are delivered by the sub-modules 20-23, as they are determined, to the activation sub-module 30.
The activation sub-module 30 is suitable for determining, based on the last 10 received value(s) of the arc detection parameter(s), whether the occurrence or presence of an electric arc is likely or proven, by comparing that or those value(s) with one or more activation threshold values corresponding to an arc detection.
Based on the result of that comparison, a TRIP protective activation signal is generated by the activation sub-module 30 and is transmitted to the circuit breaker 14.
Similarly, in the considered example, the activation sub-module 30 is suitable for determining, based on the last received value(s) of the voltage malfunction detection parameter(s), whether the occurrence or presence of an overvoltage or undervoltage is very likely or proven, by comparing that or those value(s) with an activation threshold value corresponding to an overvoltage, undervoltage detection, respectively.
Based on the result of that comparison, a TRIP protective activation signal is generated by the activation sub-module 30 and is transmitted to the circuit breaker 14.
In the considered example, the activation sub-module 30 is further suitable for determining, based on the last received value(s) of the short-circuit and overload detection parameter(s), whether the occurrence or presence of a short circuit or an overload is very 25 likely or proven, by comparing that or those value(s) with one or more activation threshold values corresponding to a short-circuit detection, overload detection, respectively.
Based on the result of that comparison, a TRIP protective activation signal is generated by the activation sub-module 30 and is transmitted to the circuit breaker 14.
In the considered example, the activation sub-module 30 is further suitable for 30 determining, based on the last received value(s) of the residual current detection parameter(s), whether the occurrence or presence of a residual current is very likely or proven, by comparing that value or those values with one or more activation threshold values corresponding to a residual current detection.
Based on the result of that comparison, a TRIP protective activation signal is 35 generated by the activation sub-module 30 and is transmitted to the circuit breaker 14.
2014224084 11 Sep 2014
Following the reception of a TRIP activation signal by the activation sub-module 30, the circuit breaker 14 is suitable for opening the switches 142 and 143 so as to stop the flow of the electric current on the phase 2 and neutral 3 conductors.
Such a cutoff stops the power supply of the circuit downstream from the circuit 5 breaker, and thereby ensures protection against the cause of the detected fault (arc fault, short-circuit, overload, overvoltage, etc.).
Such a cutoff also causes the electrical power supply of the electrical control and protection device 10 by the connection 15 to the electrical power supply 1 to be stopped.
In order to reduce these abrupt service outages, in one embodiment, the 10 processing module 12 is suitable for also taking alarm thresholds into account, aside from the activation thresholds. An alarm threshold value for a given malfunction is separate from the activation threshold value for that malfunction and is situated between the activation threshold value and values corresponding to an operational working.
In one such embodiment, the values successively determined for the arc detection, 15 undervoltage, overvoltage, short-circuit, overload and residual current parameters are delivered by the sub-modules 20-23, as they are determined, to the alarm sub-module 31.
The alarm sub-module 31 is suitable for determining, based on the last received value(s) of the arc detection parameter(s), whether the status of the electrical installation is favorable to the occurrence of an electric arc, by comparing that or those value(s) with 20 one or more alarm threshold values corresponding to an arc detection.
Similarly, in the considered example, the alarm sub-module 31 is suitable for determining, based on the last received value(s) of the voltage malfunction detection parameter(s), whether the status of the electrical installation is favorable to the occurrence of an overvoltage or under-voltage, by comparing that or those value(s) to an alarm 25 threshold value corresponding to an overvoltage, under-voltage detection, respectively.
In the considered example, the alarm sub-module 31 is suitable for determining, based on the last received value(s) of the short-circuit and overload detection parameter(s), whether the status of the electrical installation is favorable to the occurrence of a short circuit or an overload, by comparing that or those value(s) to an alarm threshold 30 value corresponding to an short-circuit, overload detection, respectively.
In the considered example, the alarm sub-module 31 is suitable for determining, based on the last received value(s) of the residual current detection parameter(s), whether the status of the electrical installation is favorable to the occurrence of a residual current, by comparing that or those value(s) to an alarm threshold value corresponding to a 35 residual current detection.
2014224084 11 Sep 2014
When the result of the comparison indicates that the status of the electrical installation 1 is favorable to the occurrence of a malfunction relative to an electric arc, undervoltage, overvoltage, short-circuit, overload or residual current detection, respectively, an alarm is generated by the alarm module 31 and is transmitted to the man5 machine interface 13.
In embodiments, that alarm comprises a sound and/or light signal generated from the electrical control and protection device 10. This sound or light signal will therefore be perceived by the people located near the detector.
The alarm may, instead or additionally, comprise the display on a display screen of 10 the man-machine interface 13, which, as previously indicated, is local to the detector or situated remotely, and/or the wired or wireless transmission, of a message indicating that the alarm threshold has been exceeded, the identification of the corresponding type of function (arc detection, undervoltage, overvoltage, short-circuit, overload or residual current), and optionally the value of the detection parameter(s) having led to the alarm.
These provisions thus allow the user of the electrical control and protection device to conduct operations aiming to resolve the detected malfunction, before a cutoff occurs.
In one embodiment, the alarm threshold values and/or the activation threshold values can be adjusted remotely by a user of the device 10, via a wired or wireless communication link, for example by connecting the device 10 to a remote part of the man20 machine interface 13.
In the event the circuit breaker 14 is activated, an operator responsible for performing maintenance on the device 10 must identify and eliminate the fault before reactivating the circuit breaker 14, so as to thus once again allow electric current to flow in the installation 1.
However, when the circuit breaker 14 is activated, it is difficult to diagnose that fault.
In one embodiment of a device according to the invention, the processing module 12 includes a diagnostic sub-module 32. The activation sub-module 30 is then suitable, when it has determined that an activation signal must be generated following the processing of values of parameters provided by one of the detection sub-modules 20-23, for transmitting, to the diagnostic sub-module 32, data representative of the detected malfunction: type of detected malfunction from among an electric arc, undervoltage, overvoltage, short-circuit, overload or residual current detection, respectively, and optionally the value of the corresponding detection parameters.
In one embodiment, the diagnostic sub-module 32 is suitable for processing that data7so as optionally to complete it with other data provided by the detection sub-modules
2014224084 11 Sep 2014
20-23 or the measuring assembly 11, and to command their display on a display screen of the man-machine interface 13, which, as previously indicated, is local to the device 10 or situated remotely, and/or to transmit them in a message via a wired or wireless link to a remote part of the man-machine interface 13 or a third-party maintenance service.
In one embodiment, the activation sub-module 30 is suitable for transmitting the activation signal to the circuit breaker 14 only after receiving a message from the diagnostic sub-module 32 confirming that the diagnostic message has indeed been sent and/or displayed.
In another embodiment, the activation sub-module 30 is designed to take into 10 account a given configurable time delay, between the transmission to the diagnostic submodule 32 of the data representative of the detected malfunction and the transmission [of] the activation signal to the circuit breaker 14. Postponing the transmission of the activation signal in this way makes it possible not to cut the electrical power supply of the device 10 before the diagnostic signal is transmitted and/or displayed.
In one embodiment, the electrical control and protection device 10 according to the invention is suitable, when the electrical power supply of the detector 10 by the connection 15 is stopped, for implementing the electrical power supply at least of the processing module 12 by the secondary electricity supply means 16, which there again makes it possible to ensure the communication of the diagnostic data even in case of activation.
In such a case, these secondary electricity supply means 16 are for example dimensioned so as to allow the processing by the diagnostic sub-module of the data transmitted by the activation sub-module 30 corresponding to the malfunction having caused the activation.
For example, the diagnostic module 32 comprises a transmission module of the
Zigbee type, which only consumes during the transmission phase, and the secondary means 16 comprise a capacitor suitable for accumulated energy based on a weak current coming from the main power supply via the connection 15 when the circuit breaker is not activated.
When the main power supply by the connection 15 is stopped after an activation, the diagnostic data is sent by the Zigbee module using the energy coming from the discharge of that capacitor.
In one embodiment, the memory 21 comprises a log storing each of the alarm, activation and/or diagnostic events, as well as the data representative of the event (time, type of malfunction having led to the event, and optionally the value of the corresponding detection parameters).
2014224084 11 Sep 2014
In one embodiment, the processing module 12 further includes an energy supervision sub-module 24.
The sensor 17 and all of the sensors 18 are suitable for measuring the current I and voltage U values regularly at the measuring point of the device 10, and for measuring 5 the energy consumption in the electrical panel, corresponding to various respective elements consuming energy in the circuit downstream from the device 10.
The measurements done in combination with, for each measurement, an identifier of the measurement point to which the measurement pertains, are provided to the energy supervision module 24 as they go along.
The energy supervision module 24 is suitable for determining, based on those provided measurements, the actual current, voltage values, the active and reactive power, power factor, consumes energy values relative to each element associated with each of the respective measuring points.
Such an energy supervision module makes it possible to optimize the electrical energy management by identifying the main sources of actual energy consumption.
The values thus obtained are shown on a display screen of the man-machine interface 13, which, as previously indicated, is local to the device 10 or situated remotely, and/or transmitted in a message via a wired or wireless link to a remote part of the manmachine interface 13 or a third-party maintenance service.
In one embodiment, the dispersion error in the measurements from the voltage sensor 17 and/or current sensor 18 is corrected, before their processing described above by the processing model 12, using a production calibration function via the microcomputer 20. For example, it is possible to program the specific gain and offset values for each sensor in order to compensate the dispersion related to the construction of the sensor.
In one embodiment, the measuring assembly 11 further includes a temperature sensor 19 suitable for periodically measuring the ambient temperature within the detector 10.
The temperature drift in the measurements of the voltage 17 and/or current 18 30 sensor is corrected, before their processing described above by the processing module 12, using a function implementing a temperature compensation curve, based on temperature measurements within the detector 10 done by the temperature sensor 19.
In the embodiment described in reference to the figures, a single-phase power supply has been considered. Of course, the invention is applicable relative to any type of electrical installation with another configuration in terms of type and number of
2014224084 11 Sep 2014 conductor(s), for example a three-phase installation including 3 phase conductors and one neutral conductor.
In another embodiment, the different threshold values depend on the nominal current adjustment for the overload and short-circuit detections, and are fixed for the 5 differential protection function.
The invention thus makes it possible, from the existing differential and/or electric arc protection apparatus, to add protection or signaling functionalities to that apparatus. These additional functionalities use input signals already present in the apparatus, without disrupting its operation. These functionalities are for example implemented using a 10 processor in a wireless communication module.
In embodiments of the invention, only one or some of the functions or all of the functions of the processing module 12 described above are implemented in an electrical control and protection device according to the invention, as illustrated in figures 3 to 6.
Identical references between the figures designate similar elements.
The connection 15 to the main power supply has not been shown in figures 3-6.
As an illustration, an electrical control and protection device 100 is shown in figure 3 in one embodiment of the invention. It includes a voltage sensor 17, a current I sensor 18a, a residual current Id sensor 18b and an electric arc detection sub-module 20 from data U, I, Id.
Aside from these functionalities of an AFDD, the electrical control and protection device 100 includes an overvoltage and undervoltage detection sub-module 21, a short circuit and overload detection sub-module 22 and a residual current detection sub-module
23.
It further includes an activation sub-module 30 ensuring the protection, against electric arcs and further against short-circuit, overload, differential protection and protection against overvoltage and undervoltage. It also includes a circuit breaker 14.
However, an activation generates an abrupt cutoff, and the continuity of service is interrupted.
In figure 4, an electrical control protection device 101 is shown, which further comprises, relative to the electrical control and protection device 100 of figure 3, an alarm sub-module 31. An alarm generated by this sub-module is delivered by the IHM 13 (local or remote emission of sound or light signal; transmission of the alarm signal by a remote communication bus and display of the alarm monitoring screen, etc.). The emission of an alarm before opening the electric circuit makes it possible to increase the continuity of the service, by informing the user of the device of the impending occurrence of a cutoff if the situation continues to deteriorate.
2014224084 11 Sep 2014
However, in the case of an activation related to a fault having occurred in the installation to be protected, the maintenance service must first look for and eliminate the fault before reactivating the device to reestablish the voltage. However, when the circuit breaker is activated, it is difficult to determine the type of fault.
In order to resolve this drawback, an electrical control and protection device 102, shown in figure 5, is proposed. Relative to the electrical control protection device 101 of figure 4, it further includes a diagnostic sub-module 32. The diagnostic information can be displayed on the front face of the device or transmitted remotely via a communication bus. In order to optimize the electricity management, an electrical control and protection 10 device 103, shown in figure 6, further includes an energy supervision sub-module 24 relative to the electrical control and protection device 102 of figure 5. Such a device makes it possible to identify the main energy consumption sources by performing power and energy measurements on measuring points, in particular using a time counter 25. The measurement information can be displayed on the front face of the device or transmitted 15 remotely via a communication bus.
2014224084 07 Aug 2018

Claims (7)

  1. CLAIMS:
    1. An electrical control and protection device suitable for being positioned in an electrical installation comprising a set of electrical conductor(s), said device comprising:
    - means for measuring the voltage and/or current and at least one conductor of said set of conductor(s); and
    - processing means, suitable for detecting an electric arc in the electrical installation based at least on measurements done by said measuring means and, if an electric arc is detected, generating an activation signal and transmitting said activation signal to an electric switching device suitable for stopping the flow of the electric current in at least said conductor of said set of electric conductors in response to the reception of said detection signal, wherein the processing means are suitable for further detecting, based at least on some of said voltage and/or current measurements in the conductor done by said measuring means, at least one malfunction from among a short circuit, an electric current overload, an overvoltage, an undervoltage and a residual current relative to at least said conductor of said set of electrical conductors, wherein if said malfunction is detected, the processing means are further suitable for generating an activation signal and transmitting said activation signal to an electric switching device suitable for stopping the flow of the electric current in at least the conductor of said set of electric conductors in response to the reception of said detection signal, and wherein the processing means are suitable, following the detection of a malfunction, for generating and transmitting a diagnostic signal comprising information characterizing the nature and source of the malfunction, and wherein the device further comprises primary means for supplying the electricity coming from the electrical installation to power the electric arc detector and comprising secondary means for supplying electricity further suitable for storing said electricity, said secondary electricity supply means being suitable for powering the processing module selectively when, following the transmission of an activation signal, the power supply of the primary means by the installation is stopped, wherein the secondary electricity supply means are sized to power the processing module, selectively, following the transmission of an activation signal by the electric arc detector, and until transmission of the diagnostic signal.
    2014224084 07 Aug 2018
  2. 2. The electrical control and protection device according to claim 1, wherein it further comprises an electric switching device suitable for stopping the flow of electric current in at least said conductor of said set of electrical conductors in response to the reception of said activation signal generated by the processing means.
  3. 3. The electrical control and protection device according to one of the preceding claims, wherein the processing means are suitable for determining the value of a parameter based at least on measurements done by said measuring means, and detecting a malfunction based on the comparison between an activation threshold and a variable representative of said determined value;
    said processing means further being suitable for comparing said value representative of said determined value and an alert threshold, separate from said activation threshold, and generating an alert signal based on said comparison.
  4. 4. The electrical control and protection device according to claim 1, wherein the processing means are suitable, once the malfunction is detected, for only transmitting the activation signal following the detection of said malfunction after the transmission of the diagnostic signal.
  5. 5. The electrical control and protection device according to one of the preceding claims, wherein the processing means are suitable for determining the energy consumed at the measuring point of the device in an electrical panel, which corresponds to various respective energy-consuming elements in the circuit downstream from the device.
  6. 6. The electrical control and protection device according to claim 5, wherein the determination, by the processing means, of the consumed energy comprises computing actual current values and/or actual voltage values, and/or the active or reactive power, and/or the power factor and/or the consumed energy.
  7. 7. The electrical control and protection device according to one of the preceding claims, wherein it comprises a temperature sensor, the processing means being suitable for correcting the voltage or current measurements of the measuring means based on temperature(s) measured by the temperature sensor.
    SCHNEIDER ELECTRIC INDUSTRIES SAS
    WATERMARK INTELLECTUAL PROPERTY PTY LTD P39502AU00
    2014224084 11 Sep 2014
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    2014224084 11 Sep 2014
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    2014224084 11 Sep 2014
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AU2014224084A 2013-09-12 2014-09-11 Electrical control and protection device Active AU2014224084B2 (en)

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FR1358774A FR3010585B1 (en) 2013-09-12 2013-09-12 ELECTRICAL CONTROL AND PROTECTION DEVICE
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CN104459367A (en) 2015-03-25
CN113049901A (en) 2021-06-29
EP2899821B1 (en) 2022-03-02
FR3010585A1 (en) 2015-03-13
EP2899821A2 (en) 2015-07-29
AU2014224084A1 (en) 2015-03-26

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