AU2017441384B2

AU2017441384B2 - Modular electrical switching device

Info

Publication number: AU2017441384B2
Application number: AU2017441384A
Authority: AU
Inventors: Nicolas CALMELET; Denis Deckert; Arnaud JEHL; Benjamin PIDANCIER
Original assignee: Hager Electro SAS
Current assignee: Hager Electro SAS
Priority date: 2017-12-01
Filing date: 2017-12-01
Publication date: 2021-05-20
Anticipated expiration: 2037-12-01
Also published as: CN111542905A; EP3718126A1; CN111542905B; WO2019106241A1; AU2017441384A1

Abstract

The subject of the present invention is a modular electrical switching device comprising a housing in which the following are housed: - a first line (L) comprising fixed (3) and mobile (4) contacts; - a second line (N); - a trip lock (7) that is able to adopt a first position and a second position, the first phase line (L) comprising a magnetic trip member (10) for switching the trip lock (7) in the event of a short-circuit fault; - an electrical transformer (11) associated with a first electronic circuit (12) that is configured to perform a differential function, for switching the trip lock (7) in the event of a differential fault; - a measurement device (14) comprising a measurement sensor (15) and a second electronic circuit (16) for switching the trip lock (7) in the event of an extended overcurrent fault.

Description

Modular electrical circuit-breaker apparatus

FIELD OF THE INVENTION The present invention relates to the field of modular electrical circuit-breakers, preferably of the modular differential circuit-breaker type.

SUMMARY OF THE INVENTION A modular electrical circuit-breaker of the differential circuit breaker type, also known under the acronym RCBO (Residual-current Circuit-Breaker with Over-current protection), has a width of one module, in other words the distance between the two lateral faces of the housing of the electrical circuit-breaker apparatus corresponds to a normalized value, called module. This type of electrical apparatus furthermore comprises, in a known manner, a thermal triggering mechanism, preferably a bi-metallic strip, providing the protection of the electrical installation protected against faults of the over-current type, an electronic differential measurement board coupled to an electromagnetic actuator, providing the protection of the protected electrical installation in the case of differential fault, together with a magnetic triggering mechanism providing the protection of the protected electrical installation in the case of a fault of the short-circuit type. It may be useful to attach complementary functions to this type of electrical apparatus. In general, these complementary functions are generally implemented by devices referred to as auxiliary devices, not forming part of the electrical circuit-breaker apparatus, owing to the size of the electrical components that provide said functions. Thus, these auxiliary devices may take the form of additional modules, fixed, in the same way as the electrical circuit-breaker apparatus, onto a modular row of the electrical panel or may take the form of an element distinct from the electrical apparatus, mounted onto the latter, for example onto the name-plate frame. The auxiliary additional modules have the drawback of occupying an additional space that is not desirable on the modular row of the electrical panel in which they are accommodated and also involve a complex and tedious installation requiring the intervention of a specialized installer for the cabling. The aim of embodiments of the present invention is to overcome these drawbacks by providing a solution allowing complementary functions to be installed, without impacting the space available either within the electrical circuit-breaker apparatus or within the electrical panel. For this purpose, an embodiment of the invention relates to a modular electrical circuit-breaker comprising at least one housing within which the following are accommodated: - a first phase line between at least a first connection terminal able and intended to be connected to an electrical distribution source and a second connection terminal intended to be connected to a load, comprising a pair of contacts, respectively fixed and mobile, - a second neutral line between at least a first connection terminal able and intended to be connected to an electrical distribution source and a second connection terminal intended to be connected to a load, - a triggering lock comprising an operating mechanism protruding from a face of the housing for manually actuating the triggering lock, and comprising a mobile contact carrier on which is installed the mobile contact, and being configured to adopt a first position, in which the fixed contact and the mobile contact are in contact, and on the other hand, a second position, in which the fixed contact and the mobile contact are separated from one another, the first phase line comprising at least one magnetic triggering mechanism able and designed to actuate the triggering lock in order to switch the triggering lock from the first position to the second position in the case of a fault of the short-circuit type, - at least one electrical transformer associated with a first electronic circuit configured for carrying out a differential function, the first electronic circuit being able and intended to be supplied between the first phase line and the second neutral line, and electrically connected to a control mechanism, for controlling an electromagnetic actuator which is able and designed to actuate the triggering lock in order to switch the triggering lock from the first position to the second position in the case of a differential fault, electrical apparatus characterized in that it comprises: - a measurement device accommodated within said housing, comprising a measurement sensor, able and intended to measure at least the value of the intensity of the current flowing only in the first phase line and a second electronic circuit, electrically connected to said measurement sensor, able and intended to be supplied between the first phase line and the second neutral line, and being configured for determining a triggering threshold, by comparison of the measured value of the intensity of the current with a predetermined value of the intensity of the current, for which the control mechanism is able and designed to control the electromagnetic actuator which is able and designed to actuate the triggering lock in order to switch the triggering lock from the first position to the second position in the case of a fault of the prolonged over-current type. According to an aspect of the present invention, there is provided a modular electrical circuit-breaker apparatus comprising at least one housing within which the following are accommodated: - a first phase line between at least a first phase line connection terminal able and intended to be connected to a phase line electrical distribution source and a second phase line connection terminal intended to be connected to a phase line load, comprising a pair of contacts respectively fixed and mobile; - a second neutral line between at least a first neutral line connection terminal able and intended to be connected to a neutral line electrical distribution source and a second neutral line connection terminal intended to be connected to a neutral line load; - a triggering lock comprising an operating mechanism protruding from a front face of the at least one housing for manually actuating the triggering lock, and comprising a mobile contact carrier on which the mobile contact is installed, and being configured to adopt a first position, in which the fixed contact and the mobile contact are in contact, and on the other hand, a second position, in which the fixed contact and the mobile contact are separated from one another; the first phase line comprising at least one magnetic triggering mechanism able and designed to actuate the triggering lock in order to switch the triggering lock from the first position to the second position in the case of a fault of the short-circuit type; - at least one electrical transformer associated with a first electronic circuit configured for carrying out a differential function, the first electronic circuit being able and intended to be supplied between the first phase line and the second neutral line, and electrically connected to a control mechanism for controlling an electromagnetic actuator, which is able and designed to actuate the triggering lock in order to switch the triggering lock from the first position to the second position in the case of a differential fault; the electrical apparatus further comprising: - a measurement device accommodated within said housing, comprising a measurement sensor able and intended to measure at least the value of the intensity of the current flowing only in the first phase line and a second electronic circuit, electrically connected to said measurement sensor, able and intended to be supplied between the first phase line and the second neutral line, and being configured for determining a triggering threshold, by comparison of the measured value of the intensity of the current with a predetermined value of the intensity of the current, for which the control mechanism is able and designed to control the electromagnetic actuator, which is able and designed to actuate the triggering lock in order to switch the triggering lock from the first position to the second position in the case of a fault of the prolonged over-current type. It is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative. Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood by virtue of the description hereinafter, which relates to several preferred embodiments, given by way of non-limiting examples, and explained with reference to the appended schematic drawings, in which: Figure 1 illustrates schematically the electrical circuit of the electrical circuit-breaker apparatus of the invention according to one variant embodiment, Figure 2 illustrates schematically the electrical circuit of the electrical circuit-breaker apparatus of the invention according to another preferred variant embodiment,

Figure 3 is a perspective view of the modular electrical circuit breaker according to the invention, Figure 4 is a side view of the modular electrical circuit-breaker of the invention according to one preferred variant embodiment whose lateral face has been partially removed in order to show the second electronic board, Figure 5 is a side view of the modular electrical circuit-breaker of the invention according to the variant embodiment in Figure 4 whose lateral face and second electronic board have been partially removed in order to show the thermal triggering mechanism of the bi-metallic strip type.

DETAILED DESCRIPTION The modular electrical circuit-breaker comprises at least one housing B within which the following are accommodated: - a first phase line L between at least a first connection terminal 1 able and intended to be connected to an electrical distribution source and a second connection terminal 2 intended to be connected to a load, comprising a pair of contacts respectively fixed 3 and mobile 4 (Figures 1 and 2), - a second neutral line N between at least a first connection terminal 5 able and intended to be connected to an electrical distribution source and a second connection terminal 6 intended to be connected to a load (Figures 1 and 2), - a triggering lock 7 comprising an operating mechanism 8 protruding from a front face F1 of the housing B for manually actuating the triggering lock 7, and comprising a mobile contact carrier 9 on which the mobile contact 4 is installed, and being configured to adopt a first position P1, in which the fixed contact 3 and the mobile contact 4 are in contact, and on the other hand, a second position P2, in which the fixed contact 3 and the mobile contact 4 are separated from one another (Figures 1, 2, 4 and 5), the first phase line L comprising at least one magnetic triggering mechanism 10 able and designed to actuate the triggering lock 7 in order to switch the triggering lock 7 from the first position P1 to the second position P2 in the case of a fault of the type short-circuit (Figures 1 and 2),

- at least one electrical transformer 11 associated with a first electronic circuit 12 configured for carrying out a differential function, the first electronic circuit 12 being able and intended to be supplied between the first phase line L and the second neutral line N, and electrically connected to a control mechanism 13 for controlling an electromagnetic actuator 10', which is able and designed to actuate the triggering lock 7 in order to switch the triggering lock 7 from the first position P1 to the second position P2 in the case of a differential fault. According to the invention, the electrical apparatus is characterized in that it comprises: - a measurement device 14 accommodated within said housing B, comprising a measurement sensor 15, 15', able and intended to measure at least the value of the intensity of the current flowing only in the first phase line L and a second electronic circuit 16, electrically connected to said measurement sensor 15, 15', able and intended to be supplied between the first phase line L and the second neutral line N, and being configured for determining a triggering threshold, by comparison of the measured value of the intensity of the current with a predetermined value of the intensity of the current, for which the control mechanism 13 is able and designed to control the electromagnetic actuator 10', which is able and designed to actuate the triggering lock 7 in order to switch the triggering lock 7 from the first position P1 to the second position P2 in the case of a fault of the prolonged over-current type (Figures 1, 2, 4 and 5). Advantageously, including a measurement device 14 accommodated within said housing B allows a modular electrical circuit breaker to be provided that has a complementary electronic measurement function with no impact on the modular format of the electrical apparatus and without having to use an additional auxiliary module. An undesirable occupation of the modular space or of the cabling area within the electrical panel, in which the electrical circuit-breaker apparatus according to the invention is designed to be installed, is thus avoided. The overall installation time is also limited since no additional cabling operation is needed. This results in a very simple installation and implementation, without any common measures compared to the products known from the prior art. The installation of the electrical apparatus according to the invention is possible without tools and in a few minutes. Advantageously, by means of the measurement sensor 15, 15', the measurement device 14 allows the value of the intensity of the current flowing in the first phase line L to be measured. This measurement sensor 15, 15' is furthermore electrically connected to a second electronic circuit 16 which allows the data relating to the measured value of the intensity of the current to be processed and, notably, allows this data to be compared with a predetermined threshold value of the intensity of the current in order to determine a triggering threshold. More particularly, for as long as the measured value of the intensity of the current is less than the predetermined threshold value of the intensity of the current, the triggering threshold is not reached, and in this case, the control mechanism 13 does not operate the electromagnetic actuator 10' and the triggering lock 7 remains in the first position Pl. Conversely, when the measured value of the intensity of the current is greater than or equal to the predetermined threshold value of the intensity of the current, in other words in the case of a prolonged over current, the triggering threshold is exceeded and, in this case, the control mechanism 13 operates the electromagnetic actuator 10', which itself actuates the triggering lock 7 and thus makes the triggering lock 7 switch from the first position P1 to the second position P2. This measurement device 14 is preferably configured to comply with the standard IEC 61009 1. For example, the predetermined threshold value of the intensity of the current may be in the range between 1.13 times the intensity of the nominal current to 9 times the intensity of the nominal current. Thus, the measurement device 14 provides an electronic function for detection of a prolonged over-current. Advantageously, in this configuration, it is possible to obviate the need to use a thermal triggering mechanism of the bi-metallic strip type in order to detect faults of the prolonged over-current type, which is usually employed for detecting such faults. The present invention is therefore advantageously extended to an electrical circuit-breaker apparatus, such as previously defined, comprising solely the measurement device 14, in the sense of the present invention, in order to carry out the function for detection of a prolonged over-current. In this case, no thermal triggering mechanism is included. Preferably, the electrical circuit-breaker apparatus of the present invention is a differential circuit-breaker, only the first phase line L of which is protected against faults.

Preferably, the second neutral line N can comprise a pair of contacts, respectively fixed 3' and mobile 4', between the first connection terminal 5 and the second connection terminal 6 (Figures 1 and 2). Preferably, the contacts, respectively fixed 3' and mobile 4', are also installed on the mobile contact carrier 9. Thus, the contacts, respectively fixed 3' and mobile 4', are operated simultaneously with the contacts, respectively fixed 3 and mobile 4, between the first position P1 and the second position P2. The electrical circuit-breaker apparatus according to the invention is modular as Figure 3 illustrates, and thus has a width of one module, in other words the distance between the two lateral faces F2 of the housing B of the electrical circuit-breaker apparatus corresponds to a normalized value, called module. According to one preferred variant embodiment of the invention illustrated in Figure 2, the measurement sensor is a resistive heating measurement sensor 15'. According to this preferred variant embodiment of the invention, the resistive heating measurement sensor 15' may be a shunt. Preferably, in this case, the first phase line L comprises the resistive heating measurement sensor 15' in series. According to another preferred variant embodiment of the invention illustrated in Figure 1, the measurement sensor is an electrical transformer 15. According to this preferred variant embodiment of the invention, the electrical transformer 15 may comprise a Rogowski coil through which only the first line L passes. Advantageously, a resistive heating measurement sensor 15' of the shunt type offers the advantage of being compact, notably more compact and, in particular, thinner than a Rogowski coil. By way of example, a shunt may have dimensions of 15 millimeters x 5 millimeters x 1 millimeter, whereas a coil generally has a diameter of the order of 1.5 centimeters and a thickness of 5 millimeters. The present invention also extends to a measurement device 14 according to the invention for which the measurement sensor is a measurement sensor with the exclusion of an electrical transformer. According to another preferred variant embodiment of the invention, the measurement device 14 furthermore comprises a voltage measurement sensor (not shown), able and intended to measure the value of the electrical voltage from the current between the first phase line L and the second neutral line N, and being electrically connected to the second electronic circuit 16. Advantageously, by means of the voltage measurement sensor, the measurement device 14 furthermore allows the electrical voltage between the first phase line L and the second neutral line N to be measured. Accordingly, this makes it possible, by virtue of the measurement device 14, to carry out power consumption measurements. In this case, the second electronic circuit 16 of the measurement device 14 may be configured to provide a function for detection of an over-voltage and/or a function for detection of an under voltage. The second electronic circuit 16 is then configured for determining at least one triggering threshold, by comparison of the value of the measured voltage with at least one value of the predetermined threshold voltage, for which the control mechanism 13 is able and designed to control the electromagnetic actuator 10', which is able and designed to actuate the triggering lock 7 in order to switch the triggering lock 7 from the first position P1 to the second position P2, in the case of a fault of the over voltage or under-voltage type. A first value of the predetermined threshold voltage can determine a triggering threshold in the case of an under-voltage. In this case, if the value of the measured voltage is lower than the first value of the predetermined threshold voltage, an under-voltage threshold is crossed. The first value of the predetermined threshold voltage may, for example, be equal to 80 Volts. A second value of the predetermined threshold voltage can determine a triggering threshold, in the case of an over-voltage. In this case, if the value of the measured voltage is higher than the first value of the predetermined threshold voltage, an over-voltage threshold is crossed. The second value of the predetermined threshold voltage may for example be equal to 285 Volts. For example, the voltage measurement sensor may consist of a voltage divider bridge. According to another preferred variant embodiment of the invention illustrated in Figures 1 and 2, the first phase line L comprises, in series, at least one thermal triggering mechanism 17 able and designed to actuate the triggering lock 7 in order to switch the triggering lock 7 from the first position P1 to the second position P2 in the case of a fault of the prolonged over-current type. Advantageously, the thermal triggering mechanism 17 ensures the safety in the case of the absence of a voltage for supplying power to the second electronic circuit 16 of the measurement device 14 or of a malfunction of the second electronic circuit 16. Thus, by retaining a thermal triggering mechanism 17, the opening of the protected first phase line L, in the case of a prolonged over-current, is guaranteed at any time. As a consequence, the safety is enhanced by virtue of a dual monitoring of the over-current owing to the combination of the thermal triggering mechanism 17 and of the measurement device 14 carrying out an electronic measurement. According to this preferred variant embodiment of the invention illustrated in Figure 5, the thermal triggering mechanism 17 may consist of a bi-metallic strip connected or not connected to the mobile contact 4 by a flexible conductor 17' and able and designed to actuate the triggering lock 7 under the effect of a deformation of the bi-metallic strip. Advantageously, the bi-metallic strip is deformed by direct or indirect heating of the flexible conductor 17'. Preferably, the flexible conductor 17' is a conducting braid. In this configuration, the bi-metallic strip may have more compact dimensions than the bi-metallic strips usually used in the modular electrical circuit breaker apparatus' of the prior art, since a lower sensitivity is required. This is because the bi-metallic strip is only used to reinforce the measurement device 14 in the case of an absence of voltage for powering the second electronic circuit 16 of the measurement device 14 or of a malfunction of the second electronic circuit 16. According to another preferred variant embodiment of the invention, the second electronic circuit 16 of the measurement device 14 furthermore comprises a communications module 18 for transmitting data relating to the values measured by the measurement sensor 15, 15', and/or for receiving data relating to the setting of parameters for the second electronic circuit 16 and preferably relating at least to the predetermined value of the intensity of the current.

Advantageously, the addition of a communications module 18 allows the remote configuration or reconfiguration of the second electronic circuit 16. For example, it is possible to remotely set, via the communications module 18, the predetermined threshold value of the intensity of the current or other parameters coming from the second electronic circuit 16. Consequently and accordingly, the communications module 18 allows the remote setting of the parameters of the measurement device 14. Furthermore, this communications module 18 allows the data relating to the value of the intensity of the current measured by the measurement sensor 15, 15' and, where relevant, the data relating to the value of the electrical voltage measured by the voltage measurement sensor, together with any other data processed by the second electronic circuit 16, to be obtained. This communications module 18, preferably radiofrequency, may thus comprise an antenna. According to one advantageous variant embodiment of the present invention, the second electronic circuit 16 of the measurement device 14 is configured to carry out a function for detection of an electrical arc by means of the electrical transformer 11 and of the measurement sensor 15, 15' associated with the second electronic circuit 16. Advantageously, in this configuration, the measurement device 14 allows a specific function for protection against faults of the electrical arc type to be provided by means of the electrical transformer 11 associated with the first electronic circuit 12 and of the measurement sensor 15, 15' associated with the second electronic circuit 16. Thus, the measurement device 14 can actuate the triggering lock 7 in order to switch it from the first position P1 to the second position P2, when a dangerous electrical arc is detected. Indeed, the second electronic circuit 16 is configured to distinguish electrical arcs judged to be dangerous from the other electrical arcs, in order to avoid spurious triggering of the electrical circuit-breaker apparatus. More particularly, the second electronic circuit 16 is configured for monitoring and analyzing the shape of the electrical current signal measured by means of the electrical transformer 11 and of the measurement sensor 15, 15' in order to detect abnormal shapes of the electrical current signal representative of a dangerous electrical arc. Advantageously, this additional function for detection of an electrical arc allows the safety of the electrical installation protected by means of the electrical circuit-breaker apparatus according to the invention to be improved, notably against fires. According to a preferred configuration, the measurement device 14 is disposed within an accommodation 19 of the housing B situated between the second connection terminal 2 of the first phase line L and the mobile contact 4. Advantageously, the measurement device 14 is disposed in the housing B of the electrical apparatus according to the invention at the location initially intended to receive a thermal triggering mechanism. In this case, the accommodation 19 is lacking a thermal triggering mechanism. This configuration advantageously allows an optimization of the space within the housing B of the electrical apparatus according to the invention and a maximum compactness to be conserved. According to another preferred configuration illustrated in Figures 4 and 5, the measurement device 14 is disposed within an accommodation 19 of the housing B situated between the second connection terminal 2 of the first line L and the mobile contact 4, which accommodation 19 furthermore comprises the thermal triggering mechanism 17. Advantageously, the measurement device 14 is disposed in the housing B of the apparatus at the same location intended for the thermal triggering mechanism 17. This configuration advantageously allows an optimization of the space within the housing B of the electrical apparatus according to the invention and a maximum compactness to be conserved. Preferably, the electrical apparatus according to the invention can comprise a first electronic board 20 comprising a power supply circuit, for supplying power to the first electronic circuit 12 and the second electronic circuit 16 between the first phase line L and the second neutral line N and a second electronic board 21 comprising the first electronic circuit 12 and the second electronic circuit 16. Advantageously, the second electronic board 21 groups, on the one hand, the differential function and, on the other hand, the electronic function for detection of a prolonged over-current and, where required, other additional functions previously described. More particularly, the second electronic board 21 may comprise at least one microcontroller 22, a measurement electronic component 23 and an antenna forming the communications module 18. The measurement electronic component 23 is electrically connected to the measurement sensor 15, 15' and, where present, to the voltage measurement sensor. This measurement electronic component 23 allows the analog data coming from the measurement sensor 15, 15' and, where present, from the voltage measurement sensor to be converted into digital data able to be processed by the microcontroller 22. The microcontroller 22 is electrically connected to the measurement electronic component 23 for collecting and processing the data relating to the value of intensity of the current measured by the measurement sensor 15, 15' and, where relevant, to the value of electrical voltage measured by the voltage measurement sensor. The microcontroller 22 is furthermore electrically connected to said antenna in order to allow a bidirectional communication, in other words, on the one hand for communicating the data collected by the measurement sensor 15, 15' and/or the voltage measurement sensor to a remote communications unit (not shown) and, on the other hand, for receiving data relating to a configuration of the microcontroller 22 coming from a remote communications unit. The remote communications unit may consist of a computer equipped with dedicated software, a smartphone equipped with a dedicated application or similar device. The second electronic board 21 is preferably accommodated within the accommodation 19, previously described. Preferably, the control mechanism 13 can consist of an electronic control mechanism, of the thyristor type, or alternatively of a triggering relay. Thus, when the first electronic circuit 12 or the second electronic circuit 16 supplies power to the control mechanism 13, the electromagnetic actuator 10' is actuated and can act on the triggering lock 7 in order to cause it to switch from the first position P1 to the second position P2. This control mechanism 13 is electrically connected both to the first electronic circuit 12 and to the second electronic circuit 16. When the first electronic circuit 12 and the second electronic circuit 16 are located on the second electronic board 21, in this case, the control mechanism 13 is electrically connected to the second electronic board 21. Preferably, the magnetic triggering mechanism 10 comprises a coil around a mobile core capable of actuating the triggering lock 7.

Preferably, the electrical transformer 11 comprises a primary winding through which the first phase line L and the second neutral line N pass and a secondary winding electrically connected to the first electronic circuit 12. It goes without saying that the invention is not limited to the embodiments described and shown in the appended drawings. Modifications remain possible, notably as regards the composition of the various elements or by substitution of equivalent techniques, without however straying from the field of protection of the invention.

Claims

1. A modular electrical circuit-breaker apparatus comprising at least one housing within which the following are accommodated: - a first phase line between at least a first connection terminal able and intended to be connected to an electrical distribution source and a second connection terminal intended to be connected to a load, comprising a pair of contacts respectively fixed and mobile; - a second neutral line between at least a first connection terminal able and intended to be connected to an electrical distribution source and a second connection terminal intended to be connected to a load; - a triggering lock comprising an operating mechanism protruding from a front face of the at least one housing for manually actuating the triggering lock, and comprising a mobile contact carrier on which the mobile contact is installed, and being configured to adopt a first position, in which the fixed contact and the mobile contact are in contact, and on the other hand, a second position, in which the fixed contact and the mobile contact are separated from one another; the first phase line comprising at least one magnetic triggering mechanism able and designed to actuate the triggering lock in order to switch the triggering lock from the first position to the second position in the case of a fault of the short-circuit type; - at least one electrical transformer associated with a first electronic circuit configured for carrying out a differential function, the first electronic circuit being able and intended to be supplied between the first phase line and the second neutral line, and electrically connected to a control mechanism for controlling an electromagnetic actuator, which is able and designed to actuate the triggering lock in order to switch the triggering lock from the first position to the second position in the case of a differential fault; the electrical apparatus further comprising: - a measurement device accommodated within said housing, comprising a measurement sensor able and intended to measure at least the value of the intensity of the current flowing only in the first phase line and a second electronic circuit, electrically connected to said measurement sensor, able and intended to be supplied between the first phase line and the second neutral line, and being configured for determining a triggering threshold, by comparison of the measured value of the intensity of the current with a predetermined value of the intensity of the current, for which the control mechanism is able and designed to control the electromagnetic actuator, which is able and designed to actuate the triggering lock in order to switch the triggering lock from the first position to the second position in the case of a fault of the prolonged over-current type.

2. The electrical apparatus as claimed in claim 1, wherein the measurement sensor is a resistive heating measurement sensor.

3. The electrical apparatus as claimed in claim 1, wherein the measurement sensor is an electrical transformer.

4. The electrical apparatus as claimed in claim 2, wherein the resistive heating measurement sensor is a shunt.

5. The electrical apparatus as claimed in claim 3, wherein the electrical transformer comprises a Rogowski coil through which only the first line passes.

6. The electrical apparatus as claimed in any one of the preceding claims 1 to 5, wherein the measurement device further comprises a voltage measurement sensor, able and intended to measure the value of the electrical voltage from the current between the first phase line and the second neutral line, and being electrically connected to the second electronic circuit.

7. The electrical apparatus as claimed in any one of the preceding claims 1 to 6, wherein the first phase line comprises, in series, at least one thermal triggering mechanism able and designed to actuate the triggering lock in order to switch the triggering lock from the first position to the second position in the case of a fault of the prolonged over-current type.

8. The electrical apparatus as claimed in claim 7, wherein the thermal triggering mechanism consists of a bi-metallic strip connected or not connected to the mobile contact via a flexible conductor and able and designed to actuate the triggering lock under the effect of a deformation of the bi-metallic strip.

9. The electrical apparatus as claimed in any one of the preceding claims 1 to 8, wherein the second electronic circuit of the measurement device further comprises a communications module for transmitting data relating to the values measured by the measurement sensor, and/or for receiving data relating to the parameter settings of the second electronic circuit and, preferably, relating at least to the predetermined value of the intensity of the current.

10. The electrical apparatus as claimed in any one of the preceding claims 1 to 9, wherein the second electronic circuit of the measurement device is configured for carrying out a function for detection of electrical arcs by means of the electrical transformer and of the measurement sensor associated with the second electronic circuit.

11. The electrical apparatus as claimed in any one of the preceding claims 1 to 10, wherein the measurement device is disposed within an accommodation of the housing situated between the second connection terminal of the first phase line and the mobile contact.

12. The electrical apparatus as claimed in any one of the preceding claims 7 to 10, wherein the measurement device is disposed within an accommodation of the housing situated between the second connection terminal of the first phase line and the mobile contact, which an accommodation further comprises the thermal triggering mechanism.

13. The electrical apparatus as claimed in any one of the preceding claims 1 to 12, further comprising a first electronic board comprising a power supply circuit, for supplying power to the first electronic circuit and the second electronic circuit between the first phase line and the second neutral line, and a second electronic board comprising the first electronic circuit and the second electronic circuit.