CN112243530A - Electrical differential switching device - Google Patents
Electrical differential switching device Download PDFInfo
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- CN112243530A CN112243530A CN201880093446.XA CN201880093446A CN112243530A CN 112243530 A CN112243530 A CN 112243530A CN 201880093446 A CN201880093446 A CN 201880093446A CN 112243530 A CN112243530 A CN 112243530A
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- 230000011664 signaling Effects 0.000 claims description 19
- 230000007935 neutral effect Effects 0.000 claims description 14
- 230000006378 damage Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 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 imbalance 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 imbalance of two or more currents or voltages with differential transformer
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- 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
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- 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
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- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to an electrical differential switching device comprising: a first line (L) comprising a pair of fixed and movable contacts; a second line (N); a trip lock including a movable contact holder on which a movable contact is mounted, the trip lock being configured to assume a first position in which the fixed contact and the movable contact are in contact with each other and a second position in which the fixed contact and the movable contact are spaced apart from each other; a transformer (7) associated with a first electronic circuit (8) for performing a differential function, wherein the first electronic circuit (8) can operate a control element (9) for controlling an electromagnetic actuator (10) to switch the trip lock from the first position to the second position in the event of a differential fault; and a second electronic circuit (11) connected between the first electronic circuit (8) and the control element (9) for operating the control element (9) of the electromagnetic actuator (10) for a first predetermined period of time (t1) when a differential fault occurs and power is being supplied to the first electronic circuit (8).
Description
Technical Field
The present invention relates to the field of electrical differential switching devices of the differential switch, differential circuit breaker or similar type.
Background
As is known, a differential circuit breaker of the RCBO (residual circuit breaker with overcurrent protection) type comprises: a first phase line which is located between a first connection terminal to be connected to a distribution power source and a second connection terminal to be connected to a load, and includes a pair of a fixed contact and a movable contact, respectively; and a second neutral line between the first connection terminal to be connected to the distribution power source and the second connection terminal to be connected to the load. Furthermore, this type of electrical device comprises a transformer associated with an electronic circuit configured to perform a differential function. The electronic circuit is supplied between the first phase line and the second neutral line and is connected, on the one hand, between the second connection terminal of the first line and the fixed contact of the first phase line and, on the other hand, to the second connection terminal of the second neutral line. Furthermore, the electronic circuit is electrically connected to a control element designed for controlling the electromagnetic actuator. The electromagnetic actuator is configured to actuate a trip lock (trip lock) such that in the event of a differential fault, the trip lock switches from a first position in which the contacts of the first phase line are closed to a second position in which the contacts are open.
Such an electrical device must have a predetermined direction of power supply so as not to power the electronic circuit when the trip lock is in the second position, which prevents the electromagnetic actuator from being irreversibly damaged. Therefore, when installing the electrical device, the installer must ensure that the first connection terminal is connected to the distribution power source and the second connection terminal is connected to the load, but not vice versa.
However, if this type of electrical device is improperly installed, i.e. the first connection terminal is connected to the load instead of to the distribution power source and the second connection terminal is connected to the distribution power source instead of to the load, a differential type fault occurs and then the trip lock switches from the first position to the second position, but the electronic circuit will continue to be powered and continue to drive the electromagnetic actuator until the electromagnetic actuator is damaged. This is because it is not desirable that the electromagnetic actuator is powered for a long time and the electromagnetic actuator is damaged after a temperature sharply rises within several seconds to several tens of seconds. However, in this configuration, nothing prevents the user from resetting the electrical device at a later time by manually triggering the control element of the trip lock in order to switch the trip lock from the second position to the first position, but, due to the damage of the electromagnetic actuator, the differential function will no longer be ensured in the future if a differential fault subsequently occurs. This will result in the facility to which the electrical device is connected no longer being protected.
In order to remedy this drawback, it is known practice to supplement this type of electrical device with an additional switch arranged between the first phase and the electronic circuit, which is able to adopt a closed position and an open position depending on the position of the trip lock. In particular, in the open position of the additional switch, on the one hand, the fixed contact and the movable contact are open, and in the closed position of the additional switch, on the other hand, the fixed contact and the movable contact are closed. Such an additional switch allows to protect the electrical device during the dielectric test and also allows to interrupt the power supply to the electronic circuit when the contacts are open, in order to avoid damaging the electromagnetic actuator. Electrical devices with additional switches are known from the prior art, in particular from the publications EP 2085998 a1 and EP 2455961 a 1.
Disclosure of Invention
The object of the present invention is to overcome these drawbacks by proposing an alternative solution to the solutions known from the prior art, which allows the integrity of the electromagnetic actuator to be maintained.
To this end, the invention relates to an electrical differential switching device comprising:
a first phase line between at least the first connection terminal and the second connection terminal and including a pair of contacts which are a fixed contact and a movable contact, respectively,
a second neutral line between at least the first connection terminal and the second connection terminal,
a trip lock comprising an operating element for preferably manual actuation of the trip lock and comprising a movable contact holder on which the movable contact is mounted and which is configured to assume a first position in which the fixed contact and the movable contact are in contact and a second position in which the fixed contact and the movable contact are spaced apart from one another,
at least one transformer associated with a first electronic circuit configured to perform a differential function, said first electronic circuit being electrically connected to said first phase line and to said second neutral line, said first electronic circuit being able and intended to drive a control element designed to control an electromagnetic actuator able and intended to actuate a trip lock in order to switch it from a first position to a second position in the event of a differential fault, the trip lock being configured to switch from the first position to the second position in the event of a differential fault at a predetermined switching time,
the electrical device further comprises a second electronic circuit electrically connected between the first electronic circuit and the control element in order to drive the control element of the electromagnetic actuator during a predetermined first period of time, in the event of a differential failure and if the first electronic circuit is powered, said predetermined first period of time being strictly less than the destruction time of the electromagnetic actuator.
Drawings
The invention will be better understood on the basis of the following description, which relates to several preferred embodiments, provided by way of non-limiting example and explained with reference to the attached schematic drawings, in which:
figure 1 is a circuit diagram of an electrical differential switching device according to a first possibility of the invention,
figure 2 is a circuit diagram of an electrical differential switching device according to a second possibility of the present invention,
figure 3 is a circuit diagram of an electrical differential switching device according to a third possibility of the present invention,
figure 4 is a diagram showing the functional block form of the first embodiment of the present invention,
figure 5 is a diagram showing functional block forms of variants of the second and third embodiments of the invention,
figure 6 is a diagram showing functional block forms of certain aspects of the first embodiment of the invention,
fig. 7 is a diagram in functional block form showing certain aspects of variations of the second and third embodiments of the present invention.
Detailed Description
An electrical differential switching apparatus comprising:
a first phase line L between at least a first connection terminal 1 and a second connection terminal 2 and comprising a pair of contacts, respectively a fixed contact 3 and a movable contact 4,
a second neutral line N, between at least the first connection terminal 5 and the second connection terminal 6,
a trip lock (not shown) comprising an operating element (not shown) for manually actuating the trip lock and comprising a movable contact holder on which said movable contact 4 is mounted and which is configured to assume a first position P1, in which the fixed contact 3 and the movable contact 4 are in contact, and a second position P2, in which the fixed contact 3 and the movable contact 4 are at a distance from each other,
at least one transformer 7 associated with a first electronic circuit 8 configured to perform a differential function, the first electronic circuit 8 being electrically connected to the first phase line L and to the second neutral line N, the first electronic circuit 8 being able and intended to drive a control element 9 designed to control an electromagnetic actuator 10, the electromagnetic actuator 10 being able and intended to actuate a trip lock in order to switch it from a first position P1 to a second position P2 in the event of a differential fault, the trip lock being configured to: upon occurrence of a differential fault, at a predetermined switching time, a switch is made from the first position P1 to the second position P2.
According to the invention shown in fig. 4 to 7, the electrical device comprises a second electronic circuit 11, the second electronic circuit 11 being electrically connected between the first electronic circuit 8 and the control element 9 so as to drive the control element 9 of the electromagnetic actuator 10 in the event of a differential fault and, if the first electronic circuit 8 is powered, during a predetermined first period of time t1, the predetermined first period of time t1 being strictly less than the destruction time of the electromagnetic actuator 10.
The "predetermined switching time" is understood to mean the time period between the detection of a fault signal by the transformer 7 and the opening of a pair of contacts, respectively the fixed contact 3 and the movable contact 4. The switching time is inherent to the characteristics of the electrical device and is therefore predetermined.
"the second electronic circuit 11 is electrically connected between the first electronic circuit 8 and the control element 9" is understood to mean that the first electronic circuit 8 is electrically connected upstream of the second electronic circuit 11 and the control element 9 is electrically connected downstream of the second electronic circuit 11.
The destruction time of an electromagnetic actuator substantially corresponds to the period of time required for its deterioration after a sharp rise in temperature caused by a long power supply.
This destruction time may be equal to a few seconds, even tens of seconds.
Advantageously, according to the invention, the electromagnetic actuator 10 is driven only during a predetermined first time period t 1. This is because, if a fault signal occurs after the opening of a pair of contacts, respectively fixed contact 3 and movable contact 4, which results in power being supplied to the first electronic circuit 8, the second electronic circuit 11 allows the power supply to the control element 9 to be interrupted at the end of the predetermined first time period t 1. It should be noted that the start of the time period t1 substantially starts from the detection of the fault signal. As a result of this, the electromagnetic actuator 10 does not risk degradation if the electrical differential switching apparatus is improperly installed. This is because if, after an improper installation, the first connection terminals 1, 5 are connected to the load instead of to the distribution power source and the second connection terminals 2, 6 are connected to the distribution power source instead of to the load, and a differential type fault occurs, the trip lock switches from the first position P1 to the second position P2, but at the end of the predetermined first time period t1, the electromagnetic actuator 10 will no longer be supplied with power. Thus, in the event of improper installation, this configuration ensures that the electrical differential switching apparatus can still operate in the event of a differential fault.
Preferably, the duration of the predetermined first time period t1 is strictly greater than the switching time of the trip lock.
The trip lock is configured to switch from the first position P1 to the second position P2 at a predetermined switching time in order to open the fixed contact 3 and the movable contact 4 upon occurrence of a differential fault. In this advantageous configuration, in the event of a differential fault, the electromagnetic actuator 10 will continue to be powered and therefore operate at least for a period greater than this switching time, so as to be able to drive the trip lock. Therefore, the normal differential protection operation of the electrical differential switching apparatus is not affected.
According to a preferred embodiment, the electrical differential switching apparatus further comprises: a switch 12 electrically connected between the first electronic circuit 8 and the control element 9, the second electronic circuit 11 being electrically connected in parallel between the first electronic circuit 8 and the switch 12, the switch 12 being able and operable to adopt a closed position to supply power to the control element 9 and an open position to interrupt the supply of power to the control element 9.
In this case, according to the first embodiment shown in fig. 4, in the event of a differential fault, on the one hand, the first electronic circuit 8 is configured to switch the switch 12 to the closed position, and on the other hand, the second electronic circuit 11 is configured to switch the switch 12 to the open position after the predetermined first time period t1 has elapsed.
After the occurrence of a differential fault, the first electronic circuit 8 is configured to provide a signal (preferably a logic signal) to the switch 12 on the one hand. More specifically, the signal is designed to switch the switch 12 from the open position to the closed position. The result of this is to supply the control element 9 with power and thus to control the electromagnetic actuator 10. On the other hand, after the occurrence of the differential fault, the first electronic circuit 8 is also configured to provide a signal to the second electronic circuit 11 so as to start the first delay with a duration equal to a predetermined first time period t1 (for example equal to 100 milliseconds). At the end of this predetermined first time period t1, the second electronic circuit 11 is configured to provide a signal to the switch 12 in order to switch the switch 12 from the closed position to the open position. The result of this is that the control element 9 is no longer supplied with power and therefore the electromagnetic actuator 10 is no longer controlled and the risk of damage is no longer jeopardized.
Preferably, the control element 9 is a thyristor.
As a non-limiting example, the second electronic circuit 11 performing the delay function may preferably be composed of an NPN transistor and a PNP transistor and a capacitor or at least one comparator.
Preferably, the switch 12 may be composed of an NPN transistor.
According to a second embodiment, in addition to the aforementioned features of the preferred embodiment, the electrical differential switching device comprises a third electronic flip-flop circuit 13 which, on the one hand, this third electronic trigger circuit 13 is electrically connected between the first electronic circuit 8 and the switch 12, the switch 12 being electrically connected to the control element 9, and on the other hand, which third electronic trigger circuit 13 is electrically connected between the first electronic circuit 8 and the second electronic circuit 11, the switch 12 being able and intended to adopt a closed position to supply the control element 9 with power and an open position to interrupt the supply of power to the control element 9, and in the event of a differential fault, on the one hand, the third electronic flip-flop circuit 13 is configured to switch the switch 12 to the closed position, and, on the other hand, the second electronic circuit 11 is configured to switch the switch 12 to the open position after the predetermined first time period t1 has elapsed.
After the occurrence of the differential fault, the first electronic circuit 8 is configured to provide a signal (preferably a logic signal) to the third electronic flip-flop circuit 13 on the one hand. The function of this third electronic flip-flop circuit 13 is: stores the signal and provides an output signal even if the signal from the first electronic circuit 8 is about to disappear. More specifically, the output signal from the third electronic flip-flop circuit 13 is designed to switch the switch 12 from the open position to the closed position. The result of this is to supply the control element 9 with power and thus to control the electromagnetic actuator 10. On the other hand, after the occurrence of the differential fault, the third electronic flip-flop circuit 13 is also configured to provide the output signal to the second electronic circuit 11 so as to start the delay with a duration equal to a predetermined first time period t1 (for example, equal to 100 milliseconds). At the end of this predetermined first time period t1, the second electronic circuit 11 is configured to provide a signal in order to switch the switch 12 from the closed position to the open position. The result of this is that the control element 9 is no longer supplied with power, and therefore the electromagnetic actuator 10 is no longer controlled and no longer risks damage.
Preferably, the third electronic flip-flop circuit 13 may be composed of, for example, an NPN transistor and a PNP transistor.
According to a third embodiment, in addition to the features of the preferred embodiment, the electrical differential switching device comprises a third electronic flip-flop circuit 13, which third electronic flip-flop circuit 13 is electrically connected, on the one hand, between the first electronic circuit 8 and the switch 12, the switch 12 being electrically connected to the control element 9, and, on the other hand, the third electronic flip-flop circuit 13 is electrically connected between the first electronic circuit 8 and the second electronic circuit 11, the switch 12 being able and serving to adopt a closed position for supplying power to the control unit 9 and an open position for interrupting the supply of power to the control element 9, and in the event of a differential fault, the second electronic circuit 11 being configured: on the one hand, the switch 12 is switched to the closed position during the predetermined first time period t1, and on the other hand, the switch 12 is switched to the open position after the predetermined first time period t1 has elapsed.
After the occurrence of the differential fault, the first electronic circuit 8 is configured to provide a signal (preferably a logic signal) to the third electronic flip-flop circuit 13. The function of this third electronic flip-flop circuit 13 is: stores the signal and provides an output signal even if the signal from the first electronic circuit 8 is about to disappear. On the one hand, the output signal of the third electronic flip-flop circuit 13 is designed to provide an output signal to the second electronic circuit 11 in order to switch the switch 12 from the open position to the closed position. The result of this is to supply the control element 9 with power and thus to control the electromagnetic actuator 10. On the other hand, the output signal of the third electronic flip-flop circuit 13 is designed to provide an output signal so as to start the first delay with a duration equal to a predetermined first time period t1 (for example, equal to 100 msec). At the end of this predetermined first time period t1, the second electronic circuit 11 is configured to provide a signal to the switch 12 in order to switch the switch 12 from the closed position to the open position. The result of this is that the control element 9 is no longer supplied with power, and therefore the electromagnetic actuator is no longer controlled 10 and the risk of damage is no longer jeopardized.
According to a variant of the second and third embodiments shown in fig. 5, the electrical differential switching device further comprises a fourth electronic circuit 14 electrically connected downstream of the second electronic circuit 11 so as to apply feedback to the second electronic circuit 11 and/or to the third electronic flip-flop circuit 13 so as to reset it after the lapse of a predetermined second time period t2, the predetermined second time period t2 being strictly greater than the predetermined first time period t 1.
In this configuration, the output signal from the third electronic flip-flop circuit 13 is designed to provide an output signal to the fourth electronic circuit 14 so as to start the second delay with a duration equal to a predetermined second time period t2 (for example, equal to 450 milliseconds). At the end of this predetermined second time period t2, the fourth electronic circuit 14 is configured to provide a signal for resetting the third electronic flip-flop circuit 13 and/or the second electronic circuit 11.
Preferably, as shown in fig. 6 and 7, the electrical differential switching device comprises a signaling device 15 and a fifth electronic circuit 16, said fifth electronic circuit (16) being electrically connected between the signaling device 15 and the first electronic circuit 8, and in the third time period t3, in the event of a differential fault, and if the first electronic circuit 8 is powered, the fifth electronic circuit 16 is configured to drive the signaling device 15.
Advantageously, if the first electronic circuit 8 is supplied again after the tripping lock has opened the contacts 3, 4, the signaling means 15 are activated for a time period corresponding to the third time period t 3. The user can thus be warned that, in the case of improper installation, a voltage is present at the second connection terminals 2, 6, which are normally designed to be connected to a load.
According to a particular aspect of the first embodiment shown in fig. 6, the electrical differential switching device comprises a third electronic flip-flop circuit 13 electrically connected between the first electronic circuit 8 and the fifth electronic circuit 16, and furthermore the fifth electronic circuit 16 is configured to supply power to the signaling device 15 after the elapse of a predetermined fourth time period t4 in case of a differential fault.
In this configuration, after a differential fault, the first electronic circuit 8 is configured to provide a signal (preferably a logic signal) to the third electronic flip-flop circuit 13. The function of this third electronic flip-flop circuit 13 is: stores the signal and provides an output signal even if the signal from the first electronic circuit 8 is about to disappear. The output signal from the third electronic flip-flop circuit 13 is designed to provide the output signal to the fifth electronic circuit 16 to start the third delay with a duration equal to a predetermined fourth time period t4 (for example equal to 1 second). At the end of this predetermined fourth time period t4, the fifth electronic circuit 16 is configured to provide a signal in order to supply power to the signaling device 15. Thus, only at the end of the predetermined fourth time period t4, the signaling device 15 is activated for a duration equal to the third time period t 3.
Furthermore, according to a particular aspect of the second embodiment and of the variant of the third embodiment shown in fig. 7, the third electronic flip-flop circuit 13 is electrically connected between the first electronic circuit 8 and the fifth electronic circuit 16, and furthermore the fifth electronic circuit 16 is configured to supply the signaling means 15 with power after the lapse of a predetermined fourth time period t4, in the event of a differential failure.
The output signal from the third electronic flip-flop circuit 13 is designed to provide an output signal to the fifth electronic circuit 16 to start the third delay with a duration equal to a predetermined fourth time period t4 (e.g. equal to 1 second). At the end of this predetermined fourth time period t4, the fifth electronic circuit 16 is configured to provide a signal in order to supply power to the signaling device 15. The user can therefore be warned that in the case of an improper installation, a voltage is still present at the second connection terminals 2, 6. Thus, only at the end of the predetermined fourth time period t4, the signaling device 15 is activated for a duration equal to the third time period t 3.
Currently, the signaling means 15 comprise at least one LED. Of course, the signaling means 15 may alternatively consist of a screen, an audio alarm, etc.
Preferably, the electrical differential switching means comprise an electronic module 17, which electronic module 17 comprises the first electronic circuit 8 and the control element 9 and the second electronic circuit 11, and if required preferably the switch 12, and if required preferably the third electronic flip-flop circuit 13, and if required preferably the fourth electronic circuit 14, and if required preferably the signaling means 15, and if required preferably the fifth electronic circuit 16.
Preferably, and as shown in fig. 1 to 3, the electronic module 17 is connected, on the one hand, between the second connection terminal 2 of the first line L for connection to a load and the fixed contact 3 of the first line L, and, on the other hand, the electronic module 17 is connected to the second connection terminal 6 of the second neutral line N for connection to a load.
Preferably, and as shown in fig. 1 to 3, the first phase line L comprises at least one magnetic trip element 18 able and intended to actuate the trip lock in order to switch it from the first position P1 to the second position P2 in the event of a fault of the short circuit type.
Preferably, the magnetic trip element 18 comprises a coil surrounding a movable core capable of actuating the trip lock.
Preferably, the magnetic trip element 18 is arranged between the second connection terminal 2 of the first line L for connection to a load and the fixed contact 3 of the first line L.
Preferably, and as shown in fig. 1 to 3, the first phase line L comprises at least one thermal trip element 19, which thermal trip element 19 is able and intended to actuate the trip lock in order to switch it from the first position P1 to the second position P2 in the event of a fault with an excessive current duration.
The thermal trip element 19 may be made of a bimetallic strip connected or not to the movable contact 4 by a flexible conductor (for example, a conductive fabric), not shown, and able and intended to actuate the trip lock under the effect of the deformation of the bimetallic strip.
Advantageously, the bimetallic strip is deformed by direct or indirect heating of the flexible conductor.
Preferably, the thermal trip element 19 is arranged between the first connection terminal 1 of the first phase line L for connection to the load and the movable contact 4 of the first phase line L.
The electrical differential switching device constitutes a differential circuit breaker if it comprises both a magnetic trip element 18 and a thermal trip element 19.
An electrical differential switching device constitutes a differential switch if it provides only a differential function.
Preferably, the connection terminals 1, 2, 5, 6 may be composed of a metal cage or a cable.
According to a first possibility of the invention, shown in fig. 1, the second neutral line N is formed by a jumper cable and does not comprise a pair of contacts, respectively a fixed contact and a movable contact.
According to a second possibility of the invention, illustrated in fig. 2, the second neutral line N does not comprise a pair of contacts, respectively a fixed contact and a movable contact.
According to a third possibility of the invention, illustrated in fig. 3, the second neutral line N comprises a pair of contacts, respectively a fixed contact 3 and a movable contact 4.
In the present description, the differential fault may originate from a differential fault in the installation or from the actuation of a test button 20, which test button 20 allows the differential function of the electrical differential switching device to be tested.
The invention is of course not limited to the embodiments described and shown in the drawings. Modifications are still possible, in particular from the point of view of the composition of the various elements or by substitution of equivalent techniques, without departing from the scope of protection of the invention.
Claims (14)
1. An electrical differential switching apparatus comprising:
a first phase line (L) comprising, between at least a first connection terminal (1) and a second connection terminal (2), a pair of contacts respectively a fixed contact (3) and a movable contact (4),
a second neutral line (N) between at least the first connection terminal (5) and the second connection terminal (6),
a trip lock comprising an operating element for actuating the trip lock, preferably manually, and comprising a movable contact holder on which the movable contact (4) is mounted and which is configured to assume a first position (P1) in which the fixed contact (3) and the movable contact (4) are in contact, and a second position (P2) in which the fixed contact (3) and the movable contact (4) are at a distance from each other,
at least one transformer (7) associated with a first electronic circuit (8) configured to perform a differential function, said first electronic circuit (8) being electrically connected to said first phase line (L) and to said second neutral line (N), said first electronic circuit (8) being able and intended to drive a control element (9) designed to control an electromagnetic actuator (10), said electromagnetic actuator (10) being able and intended to actuate said trip lock in order to switch it from said first position (P1) to said second position (P2) in the event of a differential fault, said trip lock being configured to switch from said first position (P1) to said second position (P2) at a predetermined switching time in the event of a differential fault,
the electrical device further comprises a second electronic circuit (11), the second electronic circuit (11) being electrically connected between the first electronic circuit (8) and the control element (9) so as to drive the control element (9) of the electromagnetic actuator (10) during a predetermined first time period (t1) in the event of a differential fault and if the first electronic circuit (8) is powered, the predetermined first time period (t1) being strictly less than a destruction time of the electromagnetic actuator (10).
2. The electrical device according to claim 1, wherein the duration of the predetermined first time period (t1) is strictly greater than the switching time of the trip lock.
3. The electrical device of any one of claims 1 and 2, wherein the electrical device comprises: -a switch (12) electrically connected between said first electronic circuit (8) and said control element (9), -said second electronic circuit (11) being electrically connected in parallel between said first electronic circuit (8) and said switch (12), -said switch (12) being able and intended to assume a closed position to supply power to said control element (9) and an open position to interrupt the supply of power to said control element (9).
4. Electrical device according to claim 3, wherein, in the event of a differential fault, on the one hand, the first electronic circuit (8) is configured to switch the switch (12) to the closed position and, on the other hand, the second electronic circuit (11) is configured to switch the switch (12) to the open position after the predetermined first time period (t1) has elapsed.
5. An electrical device according to claim 3, wherein the electrical device further comprises a third electronic trigger circuit (13), the third electronic trigger circuit (13) being electrically connected between the first electronic circuit (8) and the switch (12), on the one hand, the switch (12) being electrically connected to the control element (9), and, on the other hand, the third electronic trigger circuit (13) being electrically connected between the first electronic circuit (8) and the second electronic circuit (11), the switch (12) being capable and serving to adopt a closed position to supply power to the control element (9) and an open position to interrupt the supply of power to the control element (9), and wherein, in the event of a differential fault, on the one hand, the third electronic trigger circuit (13) is configured to switch the switch (12) to a closed position, and on the other hand, the second electronic circuit (11) is configured to switch the switch (12) to the open position after the predetermined first time period (t1) has elapsed.
6. An electrical device as claimed in claim 3, wherein the electrical device further comprises a third electronic trigger circuit (13), the third electronic trigger circuit (13) being electrically connected between the first electronic circuit (8) and the switch (12), on the one hand, the switch (12) being electrically connected to the control element (9), and, on the other hand, the third electronic trigger circuit (13) being electrically connected between the first electronic circuit (8) and the second electronic circuit (11), the switch (12) being capable and serving to adopt a closed position to supply power to the control element (9) and an open position to interrupt the supply of power to the control element (9), and wherein, in the event of a differential fault, the second electronic circuit (11) is configured to: -switching the switch (12) to a closed position during the predetermined first time period (t1) on the one hand, and-switching the switch (12) to an open position after the predetermined first time period (t1) has elapsed on the other hand.
7. Electrical device according to any one of claims 5 and 6, wherein it further comprises a fourth electronic circuit (14) electrically connected downstream of the second electronic circuit (11) so as to apply feedback to the second electronic circuit (11) and/or to the third electronic trigger circuit (13) so as to reset the second electronic circuit (11) and/or the third electronic trigger circuit (13) after the elapse of a predetermined second time period (t2) strictly greater than the predetermined first time period (t 1).
8. The electrical device according to any one of claims 1 to 7, wherein the electrical device comprises a signaling device (15) and a fifth electronic circuit (16), the fifth electronic circuit (16) being electrically connected between the signaling device (15) and the first electronic circuit (8), and the fifth electronic circuit (16) being configured to: during a third time period (t3), the signaling device (15) is driven in the event of a differential fault and if the first electronic circuit (8) is powered.
9. The electrical device according to claim 8 used in combination with any one of claims 3 to 7, wherein the electrical device comprises a third electronic trigger circuit (13) electrically connected between the first electronic circuit (8) and the fifth electronic circuit (16), the fifth electronic circuit (16) being further configured to: upon occurrence of an error fault, power is supplied to the signaling device (15) after a predetermined fourth time period (t4) has elapsed.
10. Electrical device according to any of claims 8 and 9, wherein the signaling device (15) comprises at least one LED.
11. Electrical device according to any one of claims 1 to 10, wherein the electrical device comprises an electronic module (17), the electronic module (17) comprising the first electronic circuit (8) and the control element (9) and the second electronic circuit (11), and, if required, the electronic module (17) preferably comprises the switch (12), and if desired, the electronic module (17) preferably comprises the third electronic trigger circuit (13), and, if required, said electronic module (17) preferably comprises said fourth electronic circuit (14), and, if required, the electronic module (17) preferably comprises the signaling means (15), and, if required, said electronic module (17) preferably comprises said fifth electronic circuit (16).
12. Electrical apparatus according to claim 11, wherein, on the one hand, the electronic module (17) is connected between the second connection terminal (2) of the first line (L) for connection to a load and the fixed contact (3) of the first line (L), and, on the other hand, the electronic module (17) is connected to the second connection terminal (6) of the second neutral line (N) for connection to a load.
13. Electrical device according to any one of claims 1 to 12, wherein the first phase line (L) comprises at least one magnetic tripping element (18) able and intended to actuate the tripping lock in order to switch it from the first position (P1) to the second position (P2) in the event of a fault of the short-circuit type.
14. Electrical apparatus according to any one of claims 1 to 13, wherein the first phase line (L) comprises at least one thermal trip element (19) able and intended to actuate the trip lock in order to switch it from the first position (P1) to the second position (P2) in the event of a fault of the type in which the overcurrent lasts for an excessively long time.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FR2018/051175 WO2019220022A1 (en) | 2018-05-16 | 2018-05-16 | Electrical differential switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112243530A true CN112243530A (en) | 2021-01-19 |
| CN112243530B CN112243530B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880093446.XA Active CN112243530B (en) | 2018-05-16 | 2018-05-16 | Electrical Differential Switching Device |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN112243530B (en) |
| AU (1) | AU2018423700B2 (en) |
| WO (1) | WO2019220022A1 (en) |
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| FR3065110B1 (en) * | 2017-04-11 | 2019-04-19 | Schneider Electric Industries Sas | METHOD AND DEVICE FOR CONTROLLING AN ACTUATOR, AND ELECTRICAL PROTECTION APPARATUS COMPRISING SUCH A DEVICE |
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- 2018-05-16 AU AU2018423700A patent/AU2018423700B2/en active Active
- 2018-05-16 CN CN201880093446.XA patent/CN112243530B/en active Active
- 2018-05-16 WO PCT/FR2018/051175 patent/WO2019220022A1/en active Application Filing
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| GB1309972A (en) * | 1970-03-16 | 1973-03-14 | Dappareillage Electr Saparel S | Protective arrangement against earth leakage currents for a multi- phase electric supply line |
| FR2696054A1 (en) * | 1992-09-18 | 1994-03-25 | Serd Sa Etude Realisa Disjonct | Differential interrupter detecting current faults - includes comparator checking current fault signal, and time circuit determining time after which connection is re-established |
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| EP2085998A1 (en) * | 2008-02-04 | 2009-08-05 | Hager-Electro SAS (Société par Actions Simplifiée) | Electric switchgear with top and bottom connection |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112243530B (en) | 2023-09-05 |
| AU2018423700B2 (en) | 2021-10-07 |
| AU2018423700A1 (en) | 2020-11-26 |
| WO2019220022A1 (en) | 2019-11-21 |
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