EP3809441A1 - Schutzgerät einer elektrischen anlage mit wechselstrom - Google Patents

Schutzgerät einer elektrischen anlage mit wechselstrom Download PDF

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Publication number
EP3809441A1
EP3809441A1 EP20202252.1A EP20202252A EP3809441A1 EP 3809441 A1 EP3809441 A1 EP 3809441A1 EP 20202252 A EP20202252 A EP 20202252A EP 3809441 A1 EP3809441 A1 EP 3809441A1
Authority
EP
European Patent Office
Prior art keywords
relay coil
circuit
connection point
signal
coil
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP20202252.1A
Other languages
English (en)
French (fr)
Inventor
Benjamin Leclercq
Dany MASSE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Legrand SNC
Legrand France SA
Original Assignee
Legrand SNC
Legrand France SA
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 Legrand SNC, Legrand France SA filed Critical Legrand SNC
Publication of EP3809441A1 publication Critical patent/EP3809441A1/de
Pending legal-status Critical Current

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Classifications

    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • 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
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • H01H71/125—Automatic release mechanisms with or without manual release using a solid-state trip unit characterised by sensing elements, e.g. current transformers
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2481—Electromagnetic mechanisms characterised by the coil design
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/60—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism cartridge type, e.g. screw-in cartridge
    • H01H73/64—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism cartridge type, e.g. screw-in cartridge having only electromagnetic release

Definitions

  • the invention relates to devices for protecting an electrical installation in alternating current.
  • the electrical apparatus 10 shown in figure 1 has a generally parallelepipedal shape.
  • main faces respectively a left face 11 and a right face 12, and side faces extending from one to the other of the main faces 11 and 12, namely a rear face 13, an upper face 14 , a front face 15 and a lower face 16.
  • the rear face 13 has a notch 17 for mounting the device 10 on a standard support rail with ⁇ profile (not shown).
  • the front face 15 has, in a central position, over approximately half of its length, a nose 18 having a lever 19.
  • the device 10 is of the modular type, that is to say that in addition to its generally parallelepipedal shape, its width (distance between the two main faces 11 and 12) is a multiple of a standardized value, known as the name “module”, which is of the order of 18 mm.
  • the apparatus 10 has a width of one module.
  • the apparatus 10 is configured, in accordance with the modular format, to belong to a row of modular apparatuses arranged side by side by being fixed from the rear on the support rail arranged horizontally.
  • the upper face 14 has two introduction orifices 20 and 21 giving access respectively to a connection terminal 22 and to a connection terminal 23.
  • the orifice 20 and the terminal 22 are located on the left.
  • Port 21 and terminal 23 are located on the right.
  • the lower face 16 has two introduction orifices, a first orifice and a second orifice giving access respectively to a connection terminal 26 and to a connection terminal 27.
  • the first orifice and the terminal 26 are located on the left.
  • the second port and terminal 27 are located on the right.
  • connection terminals 22, 23, 26 and 27 is designed to receive a stripped end section of an electric cable or a tooth of a comb for the horizontal distribution of electricity, the pitch of which (center distance between two successive teeth ) is of a module.
  • terminals 22 and 23 located at the top are intended to be connected to the two poles of an electricity distribution network while the two terminals 26 and 27 located at the bottom are intended to be connected to an installation circuit electric to protect.
  • the device 10 is a differential circuit breaker with a protected pole, that is to say having an electric circuit operating a detection of short-circuit and overcurrent in the tracking circuit of the protected pole (circuit breaker function) and operating a detection. difference in the intensity of the current flowing in the tracking circuit of the protected pole and in the tracking circuit of the unprotected pole (differential function).
  • terminal 22 and terminal 26 located on the left are provided for the pole of the electrical installation to be protected, which is a phase, while terminal 23 and terminal 27 located on the right are provided for the pole of the unprotected electrical installation, which is the neutral.
  • the current flow circuit between the terminals 22 and 26 located on the left comprises in series a magnetic tripping member 30, a fixed contact 31, a movable contact 32, a thermal tripping member 33 and a winding 34 forming part of a transformer 35 for detecting a differential fault.
  • the routing circuit between the terminals 23 and 27 located on the right comprises in series a fixed contact 36, a movable contact 37 and a winding 38 forming part of the transformer 35 for detecting a differential fault.
  • the transformer 35 comprises, in addition to the winding 34 of the routing circuit between the terminals 22 and 26 located on the left and the winding 38 of the routing circuit between the terminals 23 and 27 located on the right, which form the primary windings , a secondary winding 39, and an annular armature (magnetic circuit) 40 around which the secondary winding 39 and the primary windings 34 and 38 are made.
  • the secondary winding 39 of the transformer 35 is connected by two electrical conductors 41 and 42 to an electronic card 43.
  • the magnetic tripping member 30 forms part of a compact member 44 further comprising a tripping relay 45.
  • the electronic card 43 is connected on the one hand by two conductors 28 and 29 respectively to terminal 22 and to the terminal. terminal 23 and on the other hand by two conductors 46 and 47 to the trip relay 45.
  • the apparatus 10 comprises a mechanism 50, generally called a lock.
  • the lever 19 located outside the device 10 allows manual action on the lock 50.
  • the magnetic tripping member 30, the thermal tripping member 33 and the assembly formed by the tripping relay 45 connected to the electronic card 43 are configured to act on the lock 50 if necessary.
  • the lock 50 has two stable positions, respectively an isolating position where the two movable contacts 32 and 37 are each away from the corresponding fixed contacts 31 and 36 and a latching position where each of the two movable contacts 32 and 37 is resting on the corresponding fixed contacts 31 and 36.
  • the lever 19, projecting from the front face 15, allows manual action on the lock 50 to go from the disconnected position to the engaged position or vice versa.
  • the magnetic tripping device 30, the thermal tripping device 33 and the tripping relay 45 are configured to act automatically on the lock 50 to go from the engaged position to the disconnected position when forwarding conditions occur. predetermined current.
  • the magnetic tripping device 30 acts on the lock 50 in the event of a short circuit, the thermal tripping device 33 acts in the event of prolonged overcurrent and the tripping relay 45 acts in the event of a differential fault.
  • the magnetic tripping member 30 is formed by a coil arranged around a core controlling a striker acting in the event of a short-circuit on the lock 50.
  • the thermal tripping member 33 is formed by a bimetal deforming. in the event of prolonged overcurrent and acting due to its deformation on the lock 50.
  • the trip relay 45 which is part of the same compact member 44 as the magnetic trip member 30, is formed by another coil arranged around it the same mobile core. This other coil is supplied by the electronic card 43 which reacts to the voltage supplied by the secondary winding 39 of the transformer 35 in the event of a difference between the current circulating in the winding 34 and the current circulating in the winding 38, that is to say in the event of a differential fault.
  • the tripping relay 45 When the tripping relay 45 is thus supplied, it drives the movable core which controls the striker acting on the lock 50 to trigger the passage from the engaged position to the disconnected position.
  • the embodiment of the apparatus 10 illustrated in figure 3 is similar to that shown on figure 2 except that it does not include the thermal tripping device 33, the protection against prolonged overcurrents involving a current measurement transformer 202.
  • the transformer 202 has an annular armature 203 surrounding a conductive element of the current flow circuit between the terminals 22 and 26 and has a winding 204 around the annular frame 203.
  • the winding 204 is connected to the electronic card 43 by two electrical conductors 205 and 206.
  • the card 43 reacts not only to the voltage supplied by the winding 39 of the transformer 35, but also to the voltage supplied by the winding 204 of the transformer. current measurement transformer 202.
  • the transformer 202 is disposed between the movable contact 32 and the terminal 26, but while the thermal tripping member 33 is disposed between the movable contact 32 and the winding 34, the transformer 202 is disposed between winding 34 and terminal 26.
  • the electronic card 43 reacts not only to the voltage supplied by the secondary winding 39 of the transformer 35, but also to the voltage supplied by the winding 204 of the transformer 202.
  • the electronic card 43 powers the trip relay 45, which drives the movable core which controls the striker acting on the lock 50 to initiate the passage from the engaged position to the disconnected position.
  • the invention aims to provide, in a simple, convenient and economical manner, information on the current flowing in an electrical device for the protection of an AC electrical installation, or information that can be deduced therefrom such as the consumption of electrical energy by the portion of electrical installation connected to the output terminals of the protection device.
  • the communication device allows the protection device to provide the values of the intensity of the current flowing through it, simply with an already existing component, namely the compact device, and an appropriate electronic circuit, which is particularly important. simple, convenient and economical.
  • the invention is based on the observation that the trip relay coil can be used other than to drive the striker, namely to pick up the current flowing in the magnetic trip coil and therefore in the first tracking circuit.
  • the signal supplied by the trip relay coil is representative of the current flowing in the magnetic trip coil because the magnetic trip coil and the trip relay coil are arranged around each other, and consequently interact like the windings of a transformer, including in the absence of a specific coupling element such as a magnetic armature, the coupling between the two coils being able to be effected only by the surrounding air.
  • the device 100 for protecting an electrical installation in alternating current is similar to the device 10 described in support of the figures 1 and 2 except that it does not include a thermal tripping device 33 and does not include a differential fault detection transformer 35, that the electronic card 43 is replaced by an electronic circuit 43a and that the electronic circuit 43a is connected to the first current flow circuit between the movable contact 32 and the connection terminal 26 by the conductor 48 and connected to the second current flow circuit between the movable contact 37 and the connection terminal 27 by the conductor 49.
  • the device 100 comprises a first incoming connection terminal 22 for a first electrical pole, a second incoming connection terminal 23 for a second electrical pole different from the first electrical pole, a first outgoing connection terminal 26 for the first electrical pole and a second starting connection terminal 27 for the second electrical pole.
  • connection terminals 22, 23, 26, 27 is configured to receive a stripped end section of an electric cable or a tooth of a horizontal distribution comb.
  • the apparatus 100 comprises a first current flow circuit between the first incoming connection terminal 22 and the first outgoing connection terminal 26.
  • This first current flow circuit comprises a fixed contact 31 and a movable contact 32.
  • the apparatus 100 further comprises a second current flow circuit between the second incoming connection terminal 23 and the second outgoing connection terminal 27.
  • This second current flow circuit comprises a fixed contact 36 and a movable contact 37.
  • a control mechanism 50 of the movable contact 32 and of the movable contact 37 has two stable positions, respectively a disconnection position and an engagement position.
  • the movable contact 32 In the disconnected position, the movable contact 32 is away from the fixed contact 31 and the movable contact 37 is away from the fixed contact 36.
  • the movable contact 32 rests on the fixed contact 31 and the movable contact 37 rests on the fixed contact 36.
  • the apparatus 100 comprises a lever 19 configured to act manually on the operating mechanism 50 in order to pass from the disconnected position to the interlocked position or from the interlocked position to the disconnected position.
  • the protection device 100 comprises a compact member 44.
  • the compact member 44 comprises a magnetic tripping member 30 and a tripping relay 45.
  • the compact device 44 is configured to act on the lock 50 in order to go from the engaged position to the disconnected position when a short circuit or a prolonged overcurrent occurs.
  • the magnetic tripping member 30 is formed by a magnetic tripping coil 51 arranged around a movable core 103 controlling a striker 102 acting in the event of a short-circuit on the control mechanism 50.
  • Magnetic trip coil 51 forms a portion of the first current flow circuit.
  • the magnetic trip coil 51 is located between the incoming connection terminal 22 and the fixed contact 31.
  • the trip relay 45 is formed by a trip relay coil 52 arranged around the movable core 103.
  • the trigger relay coil 52 is provided with a first end 110 and a second end 110a.
  • the magnetic trip coil 51 and the trip relay coil 52 are disposed around each other.
  • the magnetic trip coil 51 is disposed around the trip relay coil 52.
  • the transformation ratio is the ratio between the number of turns of the two windings.
  • the ratio between the number of turns of the trip relay coil 52 and the number of turns of the magnetic trip coil 51 is advantageous for the ratio between the number of turns of the trip relay coil 52 and the number of turns of the magnetic trip coil 51 to be between 100 and 500.
  • the electronic circuit 43a of the apparatus 100 is connected to the trip relay coil 52 by a conductor 46 and by a conductor 47.
  • the conductor 46 is connected to the end 110 and the conductor 47 is connected to the end 110a.
  • Electronic circuit 43a is configured to energize trip relay coil 52 when predetermined current flow conditions occur representative of prolonged overcurrent.
  • the electronic circuit 43a comprises an extended overcurrent detector 60 and a switching circuit 61.
  • Extended overcurrent detector 60 is configured to determine the presence of current flow conditions representative of extended overcurrent from the signal present at ends 110 and 110a of trip relay coil 52.
  • the prolonged overcurrent detector 60 is further configured to produce a detection signal when the predetermined current flow conditions are present, i.e. in the event of prolonged overcurrent, and then after a predetermined period of time from. of producing the detection signal, to also produce an actuation signal.
  • the prolonged overcurrent detector 60 and the switching circuit 61 are configured so that in the absence of the detection signal, the switching circuit 61 connects the trip relay coil 52 to the prolonged overcurrent detector 60 while it isolates the circuit. trip relay coil 52 from each of the incoming connection terminals 22, 23.
  • the switching circuit 61 isolates the trip relay coil 52 from the extended overcurrent detector 60 then, when the actuation signal becomes present, connects the trip relay coil 52 to each of the terminals of inlet connection 22 and 23.
  • the prolonged overcurrent detector 60 is implemented by a microcontroller 95 and by an interface 70.
  • the switching circuit 61 connects the interface 70 to the two ends 110 and 110a of the trip relay coil 52 in the absence of the detection signal and isolates the interface 70 of the two ends 110 and 110a of the trigger relay coil. trigger 52 in the presence of the detection signal.
  • the interface 70 has two input connection points 74 and 75 which the switching circuit 61 connects or not respectively to the end 110 and to the end 110a of the coil 52 and an output connection point 76 connected to the analog input port 67 of the microcontroller 95.
  • the input connection point 75 is connected to the reference pole of the direct current part of the electronic circuit 43a.
  • the switching circuit 61 connects the input connection point 75 to the end 110a of the coil 52, this end is brought to this reference pole.
  • the interface 70 is configured to provide the analog input port 67 with an analog signal usable by the microcontroller 95 and corresponding to the voltage present between the two ends 110 and 110a of the trip relay coil 52.
  • the interface 70 comprises an amplifier 114 whose output is connected to the output connection point 76. Between the input connection point 74 and the input + of the amplifier 114 two resistors 116 and 117 are arranged in series. . Between the reference pole (to which the input connection point 75 is carried) and the input - of the amplifier 114 is disposed a resistor 118. A capacitor 115 is disposed between the input connection point 75 and the terminals. sides of resistors 116 and 117 connected to each other. A resistor 119 is arranged between the output of amplifier 114 and its input -. Resistors 120 and 121 are connected to each other. The input + of amplifier 114 is connected to the side of resistors 120 and 121 connected one to the other. The other sides of resistors 120 and 121 are respectively connected to the + pole and to the reference pole of the power supply of the electronic circuit 43a.
  • Resistor 116 and capacitor 115 make it possible to transform the current flowing in coil 52 into voltage and to operate low-pass filtration.
  • the resistors 117, 120 and 121 allow the polarization of the amplifier 114.
  • the resistors 118 and 119 make it possible to fix the gain of the amplifier 114.
  • the prolonged overcurrent detector 60 comprises in the microcontroller 95 a converter 71, a calculation unit 72 and a monitoring unit 73.
  • the converter 71 is connected to the analog port 67 of the microcontroller 95 and it is configured to produce digital values representative of the analog signal supplied by the interface 70.
  • the calculation unit 72 is configured to produce, from the digital values representative of the analog signal supplied by the interface 70, digital values representative of the rms value of the intensity of the current flowing in the magnetic trip coil 51.
  • the unit 73 for monitoring the rms value of the current flowing in the magnetic trip coil 51 is configured to compare the digital values representative of the rms value I of the intensity of the current with a current intensity threshold "threshold I "and if this threshold is exceeded for a predetermined period" threshold t "to produce the detection signal.
  • the monitoring unit 73 When the digital values representative of the rms value I of the current intensity are less than or equal to 1.13 times the current intensity threshold for less than one hour, the monitoring unit 73 must not produce the detection signal.
  • the detection signal produced by the monitoring unit 73 is available on a port 68 of the microcontroller 95.
  • the monitoring unit 73 At the end of a predetermined time after the start of the production of the detection signal, the monitoring unit 73 also produces an actuation signal, available on the port 69 of the microcontroller 95.
  • This predetermined duration depends on the components used and their reaction time, it is between 1ms and 10ms.
  • the microcontroller 95 also includes a port 66 on which the digital values produced by the calculation unit 72 are available.
  • the port 66 is connected to a communication device 96, here radio frequency, to which are thus communicated the digital values produced by the calculation unit 72, namely the digital values representative of the rms value of the intensity of the current flowing in the magnetic tripping coil 51, i.e. the current flowing in the electrical installation or portion of the electrical installation located between the output terminals 26 and 27 of the device 100.
  • the radiofrequency communication unit 96 allows remote monitoring, by means of a mobile application for example, of this current or of values which are deduced therefrom, in particular the energy consumption. of the installation or portion of the installation located between the output terminals 26 and 27 of the device 100. For example, the device 100 communicates with a gateway making it possible to find the current consumption information on a cloud to which access the mobile application.
  • the radiofrequency communication device 96 is replaced by a different communication device, for example wired or infrared, the device 100 then being provided with a corresponding port.
  • the switching circuit 61 comprises a first switching member 79, a second switching member 80, a third switching member 81 and a fourth switching member 82.
  • the first switching member 79 comprises a control connection point 87, a first connection point 83 connected by the conductor 48 and by tracks of the electronic circuit 43a to the starting connection terminal 26, and a second connection point 84 connected by the conductor 46 and by tracks of the electronic circuit 43a to the first end 110 of the trip relay coil 52 ( figure 6 ).
  • the first switch member 79 assumes a blocked configuration where it isolates the first end 110 of the trip relay coil 52 from the start connection terminal 26 .
  • the control connection point 87 is connected by tracks of the electronic circuit 43a to the port 69 of the microcontroller 95, on which the actuation signal is present or not.
  • the first switching member 79 accepts a pass-through configuration where it connects the first end 110 of the trip relay coil 52 to the outgoing connection terminal 26.
  • the first connection point 83 In the blocked configuration, the first connection point 83 is isolated from the second connection point 84 and in the pass-through configuration, the first connection point 83 is connected to the second connection point 84.
  • the first switching member 79 comprises a transistor 97 and a thyristor 98.
  • the control connection point 87 is connected to the base of the transistor 97 whose collector is connected to the + pole of the power supply of the electronic circuit 43a and whose emitter is connected to one side of a first resistor and a second resistor, the other side of the first resistor being connected to the reference pole of the power supply and the other side of the second resistor being connected to the trigger of thyristor 98 whose anode is connected to the first connection point 83 and whose cathode is connected to the second connection point 84.
  • the transistor 97 In the presence of the actuation signal at the connection point 87, the transistor 97 is on between its collector and its emitter, which causes a signal to appear at the gate of the thyristor 98 which becomes on between its anode and its cathode.
  • the second switching member 80 comprises a control connection point 88, a first connection point 85 connected by the conductor 49 and by tracks of the electronic circuit 43a to the second starting connection terminal 27, and a second connection point 86 connected by the conductor 47 and by tracks of the electronic circuit 43a to the second end 110a of the trip relay coil 52 ( figure 6 ).
  • the second switch member 80 In the absence of a predetermined signal at the control connection point 88, the second switch member 80 assumes a blocked configuration where it isolates the second end 110a of the trip relay coil 52 from the start connection terminal 27 .
  • the control connection point 88 is connected by tracks of the electronic circuit 43a to the port 69 of the microcontroller 95, on which the actuation signal is present or not.
  • the second switching member 80 accepts a pass-through configuration where it connects the second end 110a of trip relay coil 52 to start connection terminal 27.
  • the first connection point 85 is isolated from the second connection point 86 and in the pass-through configuration, the first connection point 85 is connected to the second connection point 86.
  • the second power supply switching member 80 comprises a transistor 97 and a thyristor 98.
  • the control connection point 88 is connected to the base of the transistor 97 whose collector is connected to the + pole of the power supply of the electronic circuit 43a and whose emitter is connected to one side of a first resistor and a second resistor, the other side of the first resistor being connected to the reference pole of the power supply and the other side of the second resistor being connected to the trigger of thyristor 98 whose anode is connected to the first connection point 85 and whose cathode is connected to the second connection point 86.
  • the transistor 97 In the presence of the actuation signal at the connection point 88, the transistor 97 is on between its collector and its emitter, which causes a signal to appear at the gate of the thyristor 98 which becomes on between its anode and its cathode.
  • the third switching member 81 comprises a control connection point 93, a first connection point 89 connected by the conductor 46 and by tracks of the electronic circuit 43a to the first end 110 of the trip relay coil 52, and a second connection point 90 connected by tracks of electronic circuit 43a to input connection point 74 of interface 70.
  • the third switch member 81 assumes a pass-through configuration where the first end 110 of the trip relay coil 52 is connected to the extended overcurrent detector 60, here at the input connection point 74.
  • the control connection point 93 is connected by tracks of the electronic circuit 43a to the port 68 of the microcontroller 95, on which the detection signal is present or not.
  • the third switch member 81 assumes a blocked configuration where the first end 110 of the trip relay coil 52 is isolated from the trip detector. prolonged overcurrent 60.
  • the first connection point 89 is connected to the second connection point 90 and in the blocked configuration, the first connection point 89 is isolated from the second connection point 90.
  • the third switching member 81 comprises a transistor 99.
  • connection point 93 is connected to one side of a first resistor as well as to one side of a second resistor, the other side of the first resistor being connected to the reference pole of the power supply and the other side. side of the second resistor being connected to the base of transistor 99.
  • Connection point 89 is connected to the collector of transistor 99 and connection point 90 is connected to the emitter of transistor 99.
  • the transistor 99 In the absence of the detection signal at the connection point 93, the transistor 99 is on, the absence of the detection signal being a high voltage level at the connection point 93.
  • the transistor 99 In the presence of the detection signal at the connection point 93, the transistor 99 is blocked, the presence of the detection signal being a low voltage level at the connection point 93.
  • the fourth switching member 82 comprises a control connection point 94, a first connection point 91 connected by the conductor 47 and by electronic circuit tracks 43a to the second end 110a of the trigger relay coil 52, and a second connection point 92 connected by electronic circuit tracks 43a to the input connection point 75 of the interface 70.
  • the fourth switch member 82 assumes a pass-through configuration where the second end 110a of the trip relay coil 52 is connected to the extended overcurrent detector 60, here at the input connection point 75.
  • the control connection point 94 is connected by tracks of the electronic circuit 43a to the port 68 of the microcontroller 95, on which the detection signal is present or not.
  • the fourth switch member 82 assumes a blocked configuration where the second end 110a of the trip relay coil 52 is isolated from the trip detector. prolonged overcurrent 60.
  • the first connection point 91 is connected to the second connection point 92 and in the blocked configuration, the first connection point 91 is isolated from the second connection point 92.
  • the fourth switching member 82 comprises a transistor 99.
  • connection point 94 is connected to one side of a first resistor as well as to one side of a second resistor, the other side of the first resistor being connected to the reference pole of the power supply and the other side. side of the second resistor being connected to the base of transistor 99.
  • Connection point 91 is connected to the collector of transistor 99 and connection point 92 is connected to the emitter of transistor 99.
  • the transistor 99 In the absence of the detection signal at the connection point 94, the transistor 99 is on.
  • the transistor 99 In the presence of the detection signal at the connection point 94, the transistor 99 is blocked.
  • the compact member 44 comprises a coil 101, a guide 107, a spring 108, an insulation sheath 111 and connection rods 125 and 125a here implementing the conductors 46 and 47.
  • the trip relay coil 52 is wound around the insulating plastic coil 101, which is generally tubular in shape with a flange at the end seen at the bottom in the drawings and, on the side as seen. at the top, a flange combined with housings each provided for one of the ends of the coil 52 and one of the rods 125 and 125a.
  • the insulation sheath 111 is disposed between the magnetic trip coil 51 and the trip relay coil 52.
  • the core 103, the striker 102, the spring 108 and the guide 107 are housed in the internal space of the coil 101.
  • the core 103 is generally cylindrical in shape.
  • a housing 104 is provided in one of its end portions.
  • the core 103 is slidably mounted in the spool 101.
  • the guide 107 is mounted fixed in the coil 101, on one of its ends.
  • a through bore 113 is provided in the guide 107.
  • the striker 102 is formed by a body 106 in the form of a rod and by a head 105 located at one end of the rod and beyond the latter.
  • the housing 104 is configured to receive the head 105 of the striker 102.
  • the bore 113 of the guide 107 is configured to receive the rod 106.
  • the spring 108 is disposed around the rod 106 of the striker 102.
  • connection rod 125 is arranged between the end 110 of the trip relay coil 52 and the electronic circuit 43a (see in particular the figure 13 ). Likewise, the connection rod 125a is disposed between the end 110a of the trip relay coil 52 and the electronic circuit 43a.
  • the mechanical and electrical connecting piece 112 which is made of a relatively rigid conductive material, is used for mounting the compact member 44 on the housing of the device 100 and to implement the electrical connection between the magnetic tripping coil 51 and the fixed contact 31.
  • the core 103 is kept away from the guide 107 by the spring 108.
  • the flow created by the coil 51 or the coil 52 acts on the core 103 to cause it to slide in the bore 113, against the spring 108, towards the guide 107, which drives the striker 102 by projecting its rod 106 which then acts on the control mechanism 50.
  • the compact member 44 and the lock 50 are straddling an insulation partition 109.
  • This partition 109 is provided between the path of the protected pole (between terminals 22 and 26) and the unprotected pole circuit (between terminals 23 and 27).
  • the device 100 further comprises a differential fault detection transformer 35, the electronic circuit 43a is replaced by an electronic circuit 43d and the assembly formed by the trip relay 45 connected to the electronic circuit 43d is further configured to act on the lock 50 not only in the event of prolonged overcurrent but also in the event of a differential fault.
  • the current flow circuit between the terminals 22 and 26 comprises in series the magnetic tripping member 30, the fixed contact 31, the movable contact 32 and a winding 34 forming part of the transformer 35 and the routing circuit between the terminals 23 and 27 comprises in series the fixed contact 36, the movable contact 37 and a winding 38 forming part of the differential fault detection transformer 35.
  • the transformer 35 comprises, in addition to the winding 34 and the winding 38, a secondary winding 39 and an annular armature 40 around which the secondary winding 39 and the primary windings 34 and 38 are made.
  • the secondary winding 39 is connected by two conductors 41, 42 to the electronic circuit 43d which processes the differential fault signal supplied by the transformer 35 in addition to the signal representative of the intensity of the current supplied by the coil 52.
  • the electronic circuit 43d is similar to the electronic circuit 43a except that the prolonged overcurrent detector 60 is replaced by an assembly formed by the interface 70, by the converter 71, by the control unit. calculation 72, by the monitoring unit 73, this assembly serving to determine the effective value of the intensity of the current flowing in the magnetic trip coil 51; and except that it further comprises a switching interface 63 which produces the signals to which the switching circuit 61 responds.
  • the switching interface 63 comprises two connection points 170 and 171 respectively connected by the conductors 42 and 41 to the secondary winding 39 of the transformer 35 and two output connection points 168 and 169 each connected to the switching circuit 61.
  • the output connection point 168 is connected to the control connection points 93 and 94, respectively of the third switching member 81 and fourth switching member 82; and the output connection point 169 is connected to the control connection points 87 and 88, respectively of the first switching member 79 and second switching member 80.
  • the interface 63 When a differential fault signal is supplied by the transformer 35 on the conductors 41 and 42, the interface 63 produces in response a detection signal transmitted to the third switching member 81 and to the fourth switching member 82 then produces a signal d 'actuation transmitted to the first switching member 79 and to the second switching member 80.
  • the figure 17 illustrates another variant of the apparatus shown on figures 4 to 14 .
  • the device 100 further comprises a thermal tripping member 33 and the electronic circuit 43a is replaced by an electronic circuit 43b.
  • the electronic circuit 43b is, in the same way as the electronic circuit 43a of the embodiment shown in FIG. figure 4 , connected to the trip relay coil 52 by the conductor 46 and by the conductor 47.
  • the current flow circuit between the terminals 22 and 26 here comprises in series the magnetic tripping member 30, the fixed contact 31, the movable contact 32 and the thermal tripping member 33.
  • the current channel between the terminals terminals 23 and 27 remain unchanged.
  • the thermal tripping device 33 is configured to act automatically on the lock 50 to switch from the engaged position to the disconnected position when a prolonged overcurrent occurs.
  • the thermal tripping member 33 is formed by a bimetallic strip which deforms in the event of prolonged overcurrent and acts due to its deformation on the lock 50.
  • the electronic circuit 43b is similar to the electronic circuit 43a except that it does not include either the switching circuit 61 or the monitoring unit 73, the prolonged overcurrent detector 60 being replaced by the 'assembly formed by the interface 70, by the converter 71 and by the calculation unit 72, this assembly serving to determine the effective value of the intensity of the current flowing in the magnetic trip coil 51.
  • the calculation unit 72 supplies the digital values representative of the rms value of the intensity of the current only to the radiofrequency communication unit 96 via the port 66.
  • the interface 70 is connected directly to the conductors 46 and 47.
  • the apparatus comprising the electronic circuit 43b shown in figure 18 is configured so that the trip relay coil 52 is used exclusively to supply the signal present at its ends 110 and 110a to the assembly formed by the interface 70, by the converter 71 and by the computing unit 72, and not to drive the movable core 103 controlling the striker 102.
  • the figure 19 illustrates another variant of the apparatus shown on figures 4 to 14 .
  • the electrical circuit of the device is similar to that illustrated on figure 2 except that the electronic card 43 is replaced by the electronic circuit 43c.
  • the apparatus comprises a thermal tripping member 33 and a differential fault transformer 35
  • the electronic circuit 43c is connected to the tripping relay coil by the conductor 46 and by the conductor 47
  • the current flow circuit between the terminals 22 and 26 comprises in series the magnetic tripping member 30, the fixed contact 31, the movable contact 32
  • the routing circuit between the terminals 23 and 27 comprises in series the fixed contact 36, the movable contact 37 and a winding 38 forming part of the differential fault detection transformer 35.
  • the switching interface 63 comprises two connection points 170 and 171 respectively connected by the conductors 42 and 41 to the secondary winding 39 of the transformer 35 and two output connection points 168 and 169 each connected to the switching circuit 61.
  • the output connection point 168 is connected to the control connection points 93 and 94, respectively of the third switching member 81 and fourth switching member 82; and the output connection point 169 is connected to the control connection points 87 and 88, respectively of the first switching member 79 and second switching member 80.
  • the interface 63 is configured to produce the detection signal and then to produce, after a predetermined time after the start of production of the detection signal, the actuation signal.
  • the interface 63 transmits through its output connection point 168 the detection signal to the switching circuit 61 and through its output point 169 the actuation signal.
  • the interface 63 When a differential fault signal is supplied by the transformer 35 on the conductors 41 and 42, the interface 63 produces in response a detection signal transmitted to the third switching member 81 and to the fourth switching member 82 then produces a signal d 'actuation transmitted to the first switching member 79 and to the second switching member 80.
  • the protection device has a different width and / or a different number of poles, for example a four-pole device with a width of four modules comprising four terminals in the upper part and four terminals in the lower part.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Relay Circuits (AREA)
EP20202252.1A 2019-10-16 2020-10-16 Schutzgerät einer elektrischen anlage mit wechselstrom Pending EP3809441A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1911518A FR3102293B1 (fr) 2019-10-16 2019-10-16 Appareil de protection d’une installation électrique en courant alternatif

Publications (1)

Publication Number Publication Date
EP3809441A1 true EP3809441A1 (de) 2021-04-21

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EP20202252.1A Pending EP3809441A1 (de) 2019-10-16 2020-10-16 Schutzgerät einer elektrischen anlage mit wechselstrom

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Country Link
EP (1) EP3809441A1 (de)
CN (1) CN112670943A (de)
AU (1) AU2020256419A1 (de)
FR (1) FR3102293B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566189A (en) * 1969-03-18 1971-02-23 Airpax Electronics Circuit breaker with loosely coupled deenergizing means for high overload currents
US20010026428A1 (en) * 1999-12-28 2001-10-04 Angelo Polese Relay with overcurrent protection
US20090021879A1 (en) * 2007-07-17 2009-01-22 Rivers Jr Cecil Apparatus and method for fault current interruption
US20110242720A1 (en) * 2009-05-08 2011-10-06 Rockwell Automation Technologies, Inc. Magnetic core coupling in a current transformer with integrated magnetic actuator
FR3046289A1 (fr) 2015-12-29 2017-06-30 Legrand France Appareil electrique de protection au format modulaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566189A (en) * 1969-03-18 1971-02-23 Airpax Electronics Circuit breaker with loosely coupled deenergizing means for high overload currents
US20010026428A1 (en) * 1999-12-28 2001-10-04 Angelo Polese Relay with overcurrent protection
US20090021879A1 (en) * 2007-07-17 2009-01-22 Rivers Jr Cecil Apparatus and method for fault current interruption
US20110242720A1 (en) * 2009-05-08 2011-10-06 Rockwell Automation Technologies, Inc. Magnetic core coupling in a current transformer with integrated magnetic actuator
FR3046289A1 (fr) 2015-12-29 2017-06-30 Legrand France Appareil electrique de protection au format modulaire

Also Published As

Publication number Publication date
FR3102293B1 (fr) 2021-11-12
FR3102293A1 (fr) 2021-04-23
AU2020256419A1 (en) 2021-05-06
CN112670943A (zh) 2021-04-16

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