Classifications

• • 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
  • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
  • H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being unbalance of two or more currents or voltages
  • H01H83/226—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being unbalance of two or more currents or voltages with differential transformer
• • 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
  • H02H3/16—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 fault current to earth, frame or mass
  • H02H3/162—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 fault current to earth, frame or mass for ac systems
• • 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
  • H02H3/33—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 using summation current transformers
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
  • H01H47/002—Monitoring or fail-safe circuits
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/10—Operating or release mechanisms
  • H01H71/12—Automatic release mechanisms with or without manual release
  • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay

Definitions

• the present invention relates to the field of electrical differential breaking devices, differential switch type, differential circuit breaker or the like.
• Residual circuit breakers of the RCBO type comprise, in known manner, a first phase line, between a first connection terminal, intended to be connected to an electrical distribution source and a second connection terminal, intended to be connected to a load, comprising a pair of respectively fixed and movable contacts, as well as a second neutral line between a first connection terminal, intended to be connected to an electrical distribution source, and a second connection terminal , intended to be connected to a load.
• This type of electrical apparatus further comprises an electrical transformer associated with an electronic circuit configured to perform a differential function.
• This electronic circuit is fed between the first phase line and the second neutral line, being connected, on the one hand, between the second connection terminal of the first line and the fixed contact of the first phase line and, d on the other hand, at the second connection terminal of the second neutral line.
• This electronic circuit is, moreover, also electrically connected to a control member provided for controlling an electromagnetic actuator.
• This electromagnetic actuator is configured to actuate a trigger lock so that it switches from a first position, in which the contacts of the first phase line are closed, to a second position, in which these contacts are open, in case of differential defect.
• Such an electrical apparatus must have a predetermined supply direction, so that when the trigger lock is in the second position, the electronic circuit is not energized, which prevents irreparable damage G electromagnetic actuator .
• the installer it is therefore imperative for the installer to connect the first terminals of the connection to the power distribution source and the second connection terminals to the load, and not the opposite.
• the trigger lock is switched from the first position to the second position, but the electronic circuit continues to be energized and continues to drive the electromagnetic actuator, until destruction thereof.
• the electromagnetic actuator is not intended to be powered over a long period of time and is deteriorated due to a very rapid rise in temperature, in seconds to tens of seconds.
• an additional switch disposed between the first phase line and the electronic circuit, which can adopt a closed position and an open position depending on the position of the trigger lock.
• the fixed contact and the movable contact are open
• the closed position of the additional switch the fixed contact and the movable contact. are closed.
• Such an additional switch protects the electrical apparatus, during dielectric tests, and also allows the power supply of the electronic circuit to be interrupted, when the contacts are open, so as not to damage the electromagnetic actuator.
• Electrical appliances incorporating an additional switch are known from the prior art and, in particular, publications EP 2,085,998 A1 and EP 2,455,961 A1. The present invention aims to overcome these disadvantages by providing an alternative solution to known solutions of the prior art, which allows to preserve the integrity of the electromagnetic actuator.
• the invention relates to an electrical apparatus for differential breaking comprising:
• a first phase line between at least a first connection terminal and a second connection terminal comprising a pair of contacts respectively fixed and mobile
• a second neutral line enters at least a first connection terminal and a second connection terminal
• a trigger lock comprising an operating member for actuating, preferably manually, the trigger lock, and comprising a movable contact holder on which the movable contact is mounted, and being configured to adopt a first position, in which the fixed contact and the moving contact are in contact, and secondly, a second position, in which the fixed contact and the movable contact are at a distance from one another,
• At least one electrical transformer associated with a first electronic circuit configured to perform a differential function the first electronic circuit being electrically connected to the first phase line and the second neutral line, the first electronic circuit being suitable and intended to drive a control member provided for controlling an electromagnetic actuator, which is adapted and adapted to actuate the trigger lock to switch the release lock from the first position to the second position, in the event of a differential defect, the trigger lock being configured to to be switched from the first position to the second position in the event of a differential fault in a predefined switching time
• FIG. 1 is an electrical diagram of an electrical device for differential breaking according to a first possibility of the invention
• FIG. 2 is an electrical diagram of an electrical apparatus for differential breaking according to a second possibility of the invention
• FIG. 3 is an electrical diagram of an electrical apparatus for differential breaking according to a third possibility of the invention.
• FIG. 4 is a diagram in the form of functional blocks illustrating a first embodiment according to the invention.
• FIG. 5 is a diagram in the form of functional blocks illustrating a variant of the second and third embodiments according to the invention.
• FIG. 6 is a diagram in the form of functional blocks illustrating a specificity of the first embodiment according to the invention.
• FIG. 7 is a diagram in the form of functional blocks illustrating a specificity of the variant of the second and third embodiments according to the invention.
• the electrical apparatus of differential cutoff comprises:
• first line L of phase between at least a first connection terminal 1 and a second connection terminal 2, comprising a pair of contacts respectively fixed 3 and mobile 4,
• a trigger lock comprising an operating member (not shown) for manually actuating the trigger lock, and comprising a movable contact holder on which the movable contact 4 is mounted, and being configured to adopt a first position , in which the fixed contact 3 and the movable contact 4 are in contact, and secondly, a second position P2, in which the fixed contact 3 and the movable contact 4 are at a distance from each other,
• the electrical apparatus is characterized in that it comprises a second electronic circuit 11, electrically connected between the first electronic circuit 8 and the control element 9, for, in case of differential defect and if the first electronic circuit 8 is energized, control the control member 9 of G electromagnetic actuator 10 for a first predefined period of time tl, said first predetermined period of time tl being strictly less than a destruction time of G electromagnetic actuator 10.
• predefined switching time the time between the detection of a fault signal by the electrical transformer 7 and the opening of the respectively fixed and mobile contact pair 4. This switching time is inherent in the characteristics of the electrical apparatus and is thus predefined.
• second electronic circuit 11 electrically connected between the first electronic circuit 8 and the control member 9
• first electronic circuit 8 is electrically connected upstream of the second electronic circuit 11
• control member 9 is electrically connected downstream of the second electronic circuit 11.
• the destruction time of the electromagnetic actuator G corresponds substantially to the period of time necessary to cause its deterioration following a prolonged supply generating a very rapid rise in temperature.
• This destruction time can be equal to a few seconds or even tens of seconds.
• G electromagnetic actuator 10 is driven only during the first predefined time period tl. Indeed, if a fault signal is present after the opening of the respectively fixed and mobile contact pair 4, which results in a supply of the first electronic circuit 8, the second circuit electronics 11 makes it possible to interrupt the supply of the control member 9 at the end of the first predefined time period t1. It should be noted that the beginning of the time period t1 begins substantially from the detection of the fault signal. As a result, the electromagnetic actuator 10 is not likely to be degraded, in case of improper installation of the electrical device differential cutoff.
• the trigger lock is switched from the first position PI to the second position P2, but then the actuator electromagnetic 10 will no longer be powered at the end of the first predefined time period tl. Consequently, in the event of a bad installation, this configuration makes it possible to guarantee that the electrical device for differential breaking remains operational, in the event of a differential fault.
• the duration of said first predefined time period t1 is strictly greater than the switching time of the trigger lock.
• the trigger lock is configured to be switched from the first position PI to the second position P2 in the event of a differential defect in a predefined switching time to open the fixed and movable contacts 3, 4.
• the electromagnetic actuator 10 in case of occurrence a differential defect, the electromagnetic actuator 10 remains energized and therefore operational at least for a period longer than this switching time to be able to control the trigger lock.
• the normal differential protection operation of the electrical differential breaking device is not likely to be affected.
• the electrical differential breaking device further comprises a switch 12 electrically connected between the first electronic circuit 8 and the control member 9, the second electronic circuit 11 being electrically connected in parallel between the first circuit 8 and the switch 12, the switch 12 being adapted and intended to adopt a closed position to supply the control member 9 and an open position to interrupt the supply of the control member 9.
• the first electronic circuit 8 is configured to switch the switch 12 in the closed position and, on the other hand, the second electronic circuit 11 is configured to switch the switch 12 into the open position after the first predefined time period t1 has elapsed.
• the first electronic circuit 8 is configured to provide a signal, preferably logic, to the switch 12. More particularly, this signal is provided to switch the switch 12 of the open position to the closed position. As a result, the control member 9 is energized, and hence the electromagnetic actuator 10 is controlled.
• the first electronic circuit 8 is also configured to supply a signal to the second electronic circuit 11, in order to initiate a first delay of a duration equal to the first predefined period of time tl, for example equal to 100 milliseconds.
• the second electronic circuit 11 is configured to provide a signal to the switch 12 to switch the switch 12, this time from the closed position to the open position.
• the control member 9 is no longer powered, and therefore the electromagnetic actuator 10 is no longer controlled and is no longer likely to be damaged.
• control member 9 is a thyristor.
• the second electronic circuit 11, performing the delay function may, as non-limiting examples, consist of NPN and PNP transistors and capacitors or at least one comparator.
• the switch 12 may consist of an NPN transistor.
• the electrical differential breaking device further comprises, in addition to the aforementioned characteristics of the preferred embodiment, a third logic latch circuit 13, on the one hand, electrically connected between the first circuit 8 and the switch 12, which is electrically connected to the control member 9, and, secondly, electrically connected between the first electronic circuit 8 and the second circuit 11, the switch 12 being adapted and intended to adopt a closed position to power the control member 9 and an open position to interrupt the supply of the control member 9, and in case of differential fault, firstly, the third logic latch circuit 13 is configured to switch the switch 12 to the closed position and secondly the second electronic circuit 11 is configured to switch the switch 12 to the open position after the first predefined time period tl.
• the first electronic circuit 8 is configured to provide a signal, preferably logic, to the third logic latch circuit 13.
• This third logic latch circuit 13 functions to memorize this signal and to provide an output signal, even if the signal coming from the first electronic circuit 8 disappears. More particularly, the output signal from the third logic latch logic circuit 13 is provided to switch the switch 12 from the open position to the closed position. As a result, the control member 9 is powered, and therefore the electromagnetic actuator 10 is controlled.
• the third logic latch circuit 13 is also configured to provide an output signal to the second electronic circuit 11, in order to initiate a delay of a duration equal to the first one.
• the second electronic circuit 11 is configured to provide a signal to switch the switch 12, this time from the closed position to the open position.
• the control member 9 is no longer powered, and therefore the electromagnetic actuator 10 is no longer controlled and is no longer likely to be damaged.
• the third logic latch circuit 13 may consist of, for example, NPN and PNP transistors.
• the electrical differential breaking device further comprises, in addition to the characteristics of the preferential mode, a third logic latch circuit 13, on the one hand, electrically connected between the first electronic circuit 8 and the switch 12, which is electrically connected to the control member 9, and secondly, electrically connected between the first electronic circuit 8 and the second electronic circuit 11, the switch 12 being adapted and intended to adopt a closed position to power the control member 9 and an open position to interrupt the supply of the control member 9, and in case of differential fault, the second electronic circuit 11 is configured to switch the switch 12, on the one hand, in the closed position during the first predefined time period tl and, d on the other hand, in the open position after the expiration of the first predefined time period t1.
• the first electronic circuit 8 is configured to provide a signal, preferably logic, to the third logic latch circuit 13.
• This third logic latch circuit 13 functions to memorize this signal and to provide an output signal, even if the signal coming from the first electronic circuit 8 disappears.
• the output signal from the third logic latch circuit 13 is provided to provide an output signal to the second electronic circuit 11 to switch the switch 12 from the open position to the closed position.
• the control member 9 is powered, and therefore the electromagnetic actuator 10 is controlled.
• the output signal from the third logic latch logic circuit 13 is provided to provide an output signal, so as to initiate a first time delay of a duration equal to the first predefined time period t1, for example equal to 100 milliseconds.
• the second electronic circuit 11 is configured to provide a signal to the switch 12 to switch the switch 12, this time from the closed position to the open position.
• the control member 9 is no longer powered, and therefore the electromagnetic actuator 10 is no longer controlled and is no longer likely to be damaged.
• the electric differential breaking device further comprises a fourth electronic circuit 14 electrically connected downstream of the second electronic circuit 11 to exert a feedback on the second circuit. 11 and / or the third electronic logic circuit 13 to reset them after flow of a second predefined time period t2 strictly greater than the first predefined time period t1.
• the output signal from the third logic latch logic circuit 13 is provided to provide an output signal to the fourth electronic circuit 14, to initiate a second delay of a duration equal to the second predefined time period. t2, for example equal to 450 milliseconds.
• the fourth electronic circuit 14 is configured to provide a signal for resetting the third logic latch logic circuit 13 and / or the second electronic circuit 11.
• the electrical differential breaking device comprises signaling means 15 and a fifth electronic circuit 16, which is electrically connected between the signaling means 15 and the first electronic circuit 8. , and being configured to control the signaling means
• the signaling means 15 are started for a period corresponding to the third time period t3, if the first electronic circuit 8 is powered, even after the trigger lock is caused to open the contacts 3, 4. It is thus possible to alert the user that a voltage is present at the second terminals 2, 6 normally provided to be connected to the load, in case of improper installation.
• the electrical differential breaking apparatus comprises a third logic rocker circuit 13 electrically connected between the first electronic circuit 8 and the fifth electronic circuit.
• the first electronic circuit 8 is configured to provide a signal, preferably logic, to the third logic latch circuit 13.
• This third logic-switching electronic circuit 13 has the function of storing this signal and of supplying an output signal, even though the signal coming from the first electronic circuit 8 comes to disappear.
• the output signal from the third logic latch circuit 13 is provided to provide an output signal to the fifth electronic circuit 16, to initiate a third time delay of a duration equal to the fourth predefined time period t4, for example equal to 1 second.
• the fifth electronic circuit 16 is configured to supply a signal for supplying the signaling means 15.
• the signaling means 15 are not switched on, for a duration equal to the third period of time t3, only after the fourth preset period of time t4.
• the third logic latch circuit 13 is further electrically connected between the first electronic circuit 8 and the fifth electronic circuit 16, which is in addition, configured to supply the signaling means 15 after a fourth predetermined period of time t4 has elapsed, in the event of a differential defect.
• the output signal from the third logic latch circuit 13 is provided to provide an output signal to the fifth electronic circuit 16, to initiate a third time delay of a duration equal to the fourth predefined time period t4, for example equal to 1 second.
• the fifth electronic circuit 16 is configured to supply a signal for supplying the signaling means 15. It is thus possible to alert the user that a voltage is still present at the level of the second terminals 2, 6, in case of improper installation.
• the signaling means 15 are turned on, for a duration equal to the third time period t3, only at the end of the fourth predetermined period of time t4.
• the signaling means 15 comprise at least one LED.
• the signaling means 15 may consist of a screen, an audible alarm or the like.
• the electrical differential breaking device comprises an electronic module 17 comprising the first electronic circuit 8 and the control member 9 and the second electronic circuit 11 and, where appropriate, preferably the switch 12, and the where appropriate, preferably the third logic latch circuit 13, and, where appropriate, preferably the fourth electronic circuit 14, and, if appropriate, preferably the signaling means 15, and, where appropriate, preferably the fifth electronic circuit 16.
• the electronic module 17 is connected, on the one hand, between the second connection terminal 2 of the first line L intended to be connected to a load and the fixed contact 3 of the the first line L and, secondly, to the second connection terminal 6 of the second neutral line N intended to be connected to a load.
• the first line L of phase comprises at least one magnetic triggering device 18 adapted and intended to actuate the trigger lock to switch the trigger lock from the first position P1 to the second position P2, in the event of a short circuit fault.
• the magnetic tripping member 18 comprises a coil surrounding a movable core that can actuate the trigger lock.
• the magnetic tripping member 18 is disposed between the second connection terminal 2 of the first line L intended to be connected to a load and the fixed contact 3 of the first line L.
• the first line L of phase comprises at least one thermal tripping member 19 adapted and intended to actuate the trigger lock to switch the release lock from the first position P1 to the second position P2 in case of prolonged overcurrent fault.
• the thermal tripping member 19 may consist of a bimetallic strip connected or not to the movable contact 4 by a flexible conductor not shown, such as a conductive braid, and adapted and intended to actuate the trigger lock under the effect of bimetallic deformation.
• the bimetal is deformed by direct or indirect heating of the flexible conductor.
• the thermal tripping member 19 is disposed between the first connection terminal 1 of the first line L of phase intended to be connected to a load and the moving contact 4 of the first line L phase.
• the electric differential breaking device comprises both a magnetic tripping member 18 and a thermal tripping member 19, the latter forms a differential circuit breaker.
• the electrical differential breaking device When the electrical differential breaking device performs only the differential function, it forms a differential switch.
• connection terminals 1, 2, 5, 6 may consist of a metal cage or a cable.
• the second neutral line N is formed of a flying cable and does not comprise a pair of respectively fixed and mobile contacts.
• the second line N of neutral does not comprise a pair of contacts respectively fixed and mobile.
• the second line N of neutral comprises a pair of contacts respectively fixed 3 and mobile 4.
• a differential fault can also come from a differential defect in the installation or from the actuation of a test button 20, which makes it possible to test the differential function of the electrical device for differential breaking.

Priority Applications (3)

Applications Claiming Priority (1)

Publications (1)

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Citations (5)

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• 2018
  • 2018-05-16 CN CN201880093446.XA patent/CN112243530B/zh active Active
  • 2018-05-16 AU AU2018423700A patent/AU2018423700B2/en active Active
  • 2018-05-16 WO PCT/FR2018/051175 patent/WO2019220022A1/fr active Application Filing

Patent Citations (5)

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