Arrangement for interconnecting current switching devices

Abstract

The present invention relates to an interconnection device (6) and an electrical system, the interconnection device comprising: first and second terminals, configured to be connected to first (C1) and second (C2) switching devices respectively; third and fourth terminals, configured to be connected to actuators of the first and second switching devices respectively; input terminals (10), output terminals (12) and control terminals (14, 16); a first circuit, connecting the input and output terminals to the first terminal and the second terminal; a second circuit, connecting the control terminal to the third and fourth terminals to distribute control signals, and comprising an electronic circuit (8), the electronic circuit (8) being configured to delay the transmission of a signal received from the control terminal for controlling the opening of an electrical contact to the fourth terminal.

Description

Technical Field

[0001] The invention relates to an arrangement for interconnecting current switching devices. The invention also relates to an electrical system comprising such an interconnection arrangement. Background Art

[0002] Switching devices such as contactors or relays are capable of selectively interrupting the flow of direct current.

[0003] Such a switchgear generally comprises an electrical contact or switch which can be switched between an open state and a closed state by an electromagnetic actuator integrated in the switchgear. Switching between the open state and the closed state can be performed by controlling the actuator with a control signal.

[0004] In practice, switchgear generally has a maximum current and / or voltage rating. If no other suitable switchgear is available on the market, it sometimes happens that the user has to use a switchgear with a rating much higher than the intended use. Summary of the invention

[0005] One aspect of the present invention relates to an interconnection device, characterized in that it comprises:

[0006] - a first terminal configured to be electrically connected to a first electrical contact of a first device for interrupting an electric current;

[0007] - a second terminal configured to be electrically connected to a second electrical contact of a second device for interrupting an electric current;

[0008] - a third terminal configured to be electrically connected to a first actuator for actuating the first circuit breaker device;

[0009] - a fourth terminal configured to be electrically connected to a second actuator for actuating a second circuit breaker device;

[0010] -Input terminals, output terminals and control terminals;

[0011] - a first circuit connecting the input and output terminals to the first terminal and the second terminal to electrically connect the first and second contacts of the first and second circuit breaker devices between the input and output terminals;

[0012] - a second circuit connecting the control terminals to the third and fourth terminals to distribute a control signal applied between the control terminals to the third and fourth terminals, the second circuit also comprising an electronic circuit connected between the control terminals and the fourth terminal, the electronic circuit being configured to transmit a control signal for opening the electrical contacts received from the control terminals to the fourth terminal with a predetermined time delay.

[0013] Thus, the interconnection device enables a modular combination of two or more circuit breaker devices to form an electrical system capable of interrupting DC currents having an intensity and / or a voltage higher than the rating of each of said circuit breaker devices, respectively.

[0014] According to an advantageous but not mandatory aspect, such an interconnection device may incorporate one or more of the following features, alone or in any technically permitted combination:

[0015] The interconnection device is preassembled and comprises a support on which are mounted the first terminal, the second terminal, the third terminal and the fourth terminal, the input terminal, the output terminal and the control terminal, and in which the first and second circuits are integrated.

[0016] The support is made of plastic material, preferably moulded plastic material.

[0017] The first circuit is configured to electrically connect the first electrical contacts in parallel between the input and output terminals.

[0018] The first circuit is configured to electrically connect the second electrical contacts in series with each other and in parallel with the first electrical contacts between the input and output terminals.

[0019] The control signal for opening includes a transition of a voltage applied to the control terminal from a first amplitude value to a second amplitude value lower than the first amplitude value, and the electronic circuit is configured to provide a delayed control signal to the fourth terminal, wherein the transition of the voltage to the second amplitude value is delayed by a time delay relative to the control signal transmitted to the third terminal.

[0020] The duration of the time delay is between 5 ms and 50 ms, inclusive.

[0021] Another aspect of the invention relates to an electrical system comprising:

[0022] - a first device for interrupting an electric current, comprising a first electrical contact and a first actuator, the first actuator being configured to switch the first electrical contact between an open state and a closed state in response to a control signal;

[0023] - a second device for interrupting an electric current, comprising a second electrical contact and a second actuator, the second actuator being configured to switch the second electrical contact between an open state and a closed state in response to a control signal;

[0024] - an interconnection device as described above;

[0025] In the system, the interconnection device is connected to the first and second circuit breaker devices, the first terminal is connected to the first contact, the second terminal is connected to the second contact, the third terminal is connected to the first actuator, and the fourth terminal is connected to the second actuator.

[0026] According to an advantageous but not mandatory aspect, such an electrical system may incorporate one or more of the following features, alone or in any technically permitted combination:

[0027] The first contact and the second contact are normally open type contacts.

[0028] The first and second circuit breaker devices are adapted to interrupt a DC current. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The invention will be better understood and other advantages thereof will become more apparent from the following description of one embodiment of an interconnection device, given by way of example only and with reference to the accompanying drawings.

[0030] Figure 1 is a diagram showing an electrical system including a circuit breaker device and an interconnection device according to one embodiment of the present invention;

[0031] - Figure 2 When the interconnection device is connected to the circuit breaker device Figure 1 A simplified circuit diagram of the electrical system;

[0032] - Figure 3 It is shown Figure 1 a diagram of interconnected devices;

[0033] - Figure 4 Yes means Figure 1 An example of a graph of the control signal amplitude versus time for a circuit breaker device in FIG. DETAILED DESCRIPTION

[0034] Figure 1 An electrical system 2 is shown, comprising an assembly 4 of a device for interrupting an electric current and an interconnection device 6 .

[0035] According to an example, the assembly 4 comprises a first circuit breaker device C1 and a second circuit breaker device C2. Alternatively, the number of circuit breaker devices may be greater than two.

[0036] Here, each circuit breaker device C1 and C2 is suitable for interrupting a DC current. For example, the circuit breaker devices C1 and C2 are contactors or relays.

[0037] Each circuit breaker device C1 and C2 includes electrical contacts or switches that can be reversibly switched between an open state and a closed state, respectively, to prevent or allow the flow of electric current.

[0038] Each circuit breaker device C1 and C2 further comprises an actuator, in particular an electromagnetic actuator, configured to switch the electrical contacts between an open state and a closed state in response to a control signal.

[0039] For example, the control signal is a voltage fed to the terminals of a coil of the actuator.All contacts are switched simultaneously, for example by the actuator.

[0040] In practice, each circuit breaker device C1 and C2 comprises a housing, usually made of molded plastic, and an electrical connector, usually mounted on one face of the housing. The electrical connector is connected to the electrical contacts and the actuator and allows the latter to be connected to the electrical equipment.

[0041] In this example, if Figure 2 As shown, the circuit breaker device C1 includes three first electrical contacts 40, 42 and 44. The circuit breaker device C2 includes eight second electrical contacts 50, 52, 54, 56, 58, 60, 62 and 64.

[0042] However, the number of contacts of each circuit breaker device C1, C2 may be different. For example, the number of contacts of the circuit breaker device C1 is greater than or equal to one or two and less than or equal to five or ten. The number of contacts of the circuit breaker device C2 is, for example, greater than or equal to three or five and less than or equal to ten or twenty.

[0043] According to an embodiment, the contacts 40 , 42 and 44 of the circuit breaker device C1 and the contacts 50 , 52 , 54 , 56 , 58 , 60 , 62 and 64 of the circuit breaker device C2 are normally open contacts, that is, they remain open if no control signal is applied to the actuator.

[0044] The first contacts 40, 42 and 44 of the circuit breaker device C1 are preferably in the same open or closed state at the same time, and the second contacts 50, 52, 54, 56, 58, 60, 62 and 64 of the circuit breaker device C2 are preferably all in the same open or closed state.

[0045] like Figure 1 , 2 3 , the device 6 includes an input terminal 10 , an output terminal 12 , and control terminals 14 and 16 .

[0046] Terminals 10 and 12 enable the system 2 to be connected to an electrical device. By way of illustrative example, in Figure 2 In the embodiment, the electric load 30 is connected between the output terminal 12 and another terminal 32 of the electric device.

[0047] Here, the device 6 is intended to be connected to the circuit breaker devices C1 and C2, enabling the system 2 to interrupt the current flowing between the input terminals 10 and the output terminals 12. For example, the device 6 is removable and can be reversibly connected to the circuit breaker devices C1 and C2.

[0048] The control terminals 14 and 16 are adapted to receive a control signal, in particular a control signal similar to a control signal for controlling one of the actuators of the circuit breaker devices C1 and C2.

[0049] The device 6 also includes first terminals L1 / C1, T1 / C1, L2 / C1, T2 / C1, L3 / C1 and T3 / C1, second terminals L1 / C2, T1 / C2, L2 / C2, T2 / C2, L3 / C2, T3 / C2, 13NO / C2, 14NO / C2, 53NO, 54NO, 63NO, 64NO, 73NO, 74NO, 83NO and 84NO, third terminals A1 / C1 and A2 / C1 and fourth terminals A1 / C2 and A2 / C2.

[0050] For example, each terminal comprises a blade or pad of conductive material adapted to be connected to a corresponding connector of the circuit breaker device C1 or C2.

[0051] According to an example, when the device 6 is connected to the assembly 4 to form the system 2 , the first terminals L1 / C1 , T1 / C1 , L2 / C1 , T2 / C1 , L3 / C1 and T3 / C1 are electrically connected to the first electrical contacts 40 , 42 , 44 .

[0052] More specifically, the first terminals are grouped in pairs, each of which is connected to a first electrical contact. For example, terminals L1 / C1 and T1 / C1 are connected to opposite terminals of contact 40, respectively. Terminals L2 / C1 and T2 / C1 are connected to opposite terminals of contact 42, respectively. Terminals L3 / C1 and T3 / C1 are connected to opposite terminals of contact 44, respectively.

[0053] In a similar manner, the second terminals L1 / C2, T1 / C2, L2 / C2, T2 / C2, L3 / C2, T3 / C2, 13NO / C2, 14NO / C2, 53NO, 54NO, 63NO, 64NO, 73NO, 74NO, 83NO and 84NO are electrically connected to the second electrical contacts 50, 52, 54, 56, 58, 60, 62, 64, respectively.

[0054] Here, the second terminals are again grouped in pairs, each second terminal being connected to a second electrical contact. For example, terminals L1 / C2, T1 / C2 are respectively connected to opposite terminals of contact 50. Terminals 83NO, 84NO are respectively connected to opposite terminals of contact 64, and so on.

[0055] The third terminals A1 / C1 and A2 / C1 are electrically connected to the actuator of the first circuit breaker device C1. The fourth terminals A1 / C2 and A2 / C2 are electrically connected to the actuator of the second circuit breaker device C2.

[0056] The device 6 is preferably preassembled and comprises a support 18 on which are mounted the terminals 10, 12, 14 and 16, first terminals L1 / C1, T1 / C1, L2 / C1, T2 / C1, L3 / C1 and T3 / C1, second terminals L1 / C2, T1 / C2, L2 / C2, T2 / C2, L3 / C2, T3 / C2, 13NO / C2, 14NO / C2, 53NO, 54NO, 63NO, 64NO, 73NO, 74NO, 83NO and 84NO, third terminals A1 / C1 and A2 / C1 and fourth terminals A1 / C2 and A2 / C2.

[0057] For example, the support 18 is made of a plastic material, preferably a molded plastic material.According to an example, the support 18 forms a rigid or at least partially rigid armature.

[0058] The support 18 may optionally include one or more connector portions 20 visible from the outside of the support 18 , which connect portions of the support 18 , in particular when the rigid portion of the support 18 supporting the terminals is not integrally formed.

[0059] According to an example, the device 6 is suitable for being mounted on the surface of the circuit breaker devices C1 and C2 so that when the device 6 is connected to the circuit breaker devices C1 and C2, the terminals of the device 6 are inserted into the corresponding connectors of the circuit breaker devices C1 and C2. Figure 1 In the example of FIG. 1 , the circuit breaker devices C1 and C2 are aligned and arranged side by side, for example, fixed on the same circuit board.

[0060] It is thus clear that the arrangement and shape of the device 6 depends on the shape of the circuit-breaker devices C1 and C2 and is therefore adapted according to the type of circuit-breaker device to which the device 6 is intended to be connected.

[0061] For example, Figure 1 As shown, the terminals are divided between a plurality of connection areas bearing reference numerals 22, 24 and 26. The shape and size of the connection areas are complementary to the layout of the connectors of the circuit breaker devices C1 and C2.

[0062] According to the illustrative example, the terminals of the device 6 are arranged along parallel rows, one of the terminals of each pair of terminals being placed in the upper row and the other terminal of the pair being placed in the lower row.

[0063] exist Figure 3In the example shown, terminals L1 / C1, L2 / C1, L3 / C1, L1 / C2, L2 / C2, L3 / C2, 13NO / C2, 53NO, 63NO, 73NO, 83NO, A1 / C1 and A1 / C2 are placed in the upper row and terminals 1 / C1, T2 / C1, T3 / C1, T1 / C2, T2 / C2, T3 / C2, 14NO / C2, 54NO, 64NO, 74NO, 84NO, A2 / C1 and A2 / C2 are placed in the lower row.

[0064] According to an alternative embodiment not shown, the support 18 comprises fixing elements enabling the support 18 to be reversibly fixed to the respective housings of the circuit breaker devices C1 and C2. The fixing elements may comprise hooks, screws, bolts, clamping means, fixing means relying on complementary shapes or any other equivalent fixing means.

[0065] The device 6 includes a first circuit, which connects the input terminal 10 and the output terminal 12 to the first terminals L1 / C1, T1 / C1, L2 / C1, T2 / C1, L3 / C1 and T3 / C1, and to the second terminals L1 / C2, T1 / C2, L2 / C2, T2 / C2, L3 / C2, T3 / C2, 13NO / C2, 14NO / C2, 53NO, 54NO, 63NO, 64NO, 73NO, 74NO, 83NO, so as to electrically connect the first contacts 40, 42, 44 and the second contacts 50, 52, 54, 56, 58, 60, 62 and 64 of the circuit breaker device C1, C2 between the input terminal 10 and the output terminal 12.

[0066] According to an embodiment, the first circuit is configured to electrically connect the first contacts 40, 42, 44 in parallel between the input and output terminals 10, 12. In addition, the first circuit is configured to electrically connect the second contacts 50, 52, 54, 56, 58, 60, 62 and 64 in series with each other and in parallel with the first contacts 40, 42, 44 between the input and output terminals 10, 12.

[0067] For example, the first circuit comprises electrical conductors integrated into the support 18. Figure 3 , the electrical conductors of the first circuit are identified by the hatched areas.

[0068] According to one example, the electrical conductor is a metal strip or cable and is fixed to the support 18 or integrated into the support 18, for example by overmolding. According to another example, the electrical conductor is a conductive track deposited on an insulating substrate, for example an insulating resin board, which is fixed to or integrated into the support 18.

[0069] exist Figure 3In the example shown, the support 18 includes plates 70, 72, 74, 76, 78 and 80, which are associated with the connection areas 22, 24 and 26 on which the terminals are mounted. For example, the plates 70, 74 and 78 are used to support the upper terminals, while the plates 72, 76 and 80 are used to support the lower terminals. The support 18 also includes auxiliary plates 82, 84, 86, 88 and 90, which interconnect the plates 70, 72, 74, 76, 78 and 80 and at least partially form the connector 20 therein. In order to Figure 3 For easier reading, the connection areas 22 , 24 and 26 are shown separated from one another.

[0070] In this illustrative and non-limiting example, the first circuit includes a conductor connecting the input terminal 10 to the terminals L1 / C1, L2 / C1, L3 / C1, L1 / C2, another conductor connecting the output terminal 12 to the terminals T1 / C1, T2 / C1, T3 / C1 and 83NO, and an additional conductor connecting the other second terminals two by two to connect the second contacts in series, as described above, such as Figure 2 shown.

[0071] The device 6 further comprises a second circuit connecting the control terminals 14 and 16 to the third and fourth terminals A1 / C1 , A2 / C1 , A1 / C2 and A2 / C2 to distribute the control signal applied between the control terminals 14 and 16 to the third and fourth terminals.

[0072] For example, as described above, the control signal here is a voltage. When a voltage is applied between the control terminals 14 and 16, a corresponding voltage is applied between the third terminals A1 / C1 and A2 / C1 and between the fourth terminals A1 / C2 and A2 / C2.

[0073] For example, the first circuit comprises electrical conductors integrated into the support 18. Figure 3 , the electrical conductors of the second circuit are identified by shaded areas. The electrical conductors of the second circuit are, for example, similar to the electrical conductors of the first circuit.

[0074] The second circuit further comprises an electronic circuit 8 configured to transmit a control signal for opening the electrical contacts received from the control terminals 14 and 16 to the fourth terminals A1 / C2 and A2 / C2 with a predetermined time delay (T).

[0075] For example, the electronic circuit 8 is connected between the control terminal and the fourth terminal. The electronic circuit 8 is mounted on a support 18 , here on a plate 74 .

[0076] exist Figure 41 shows by way of example the voltage amplitudes applied between the third terminals A1 / C1 and A2 / C1 (curve 100) and between the fourth terminals A1 / C2 and A2 / C2 (curve 102) when a command for opening the first and second contacts is received from the control terminals 14 and 16.

[0077] Here, the abscissa axis t corresponds to time, and the ordinate axis V corresponds to the amplitude value expressed in volts. Figure 4 For ease of reading, a vertical offset of 100 has been applied to the curve.

[0078] For example, in the case of normally open contacts, the command to open the contacts corresponds to a control voltage switching from a first amplitude value (e.g., equal to 5 volts DC) to a second amplitude value (e.g., zero volts) lower than the first amplitude. In other words, according to these examples, the coil of the actuator of the circuit breaker device is de-energized to force the electrical contacts of the circuit breaker device to return to their open state.

[0079] Therefore, the second circuit and the electronic circuit 8 are configured to provide a delayed control signal (curve 102) to the fourth terminals A1 / C2 and A2 / C2, wherein the transition of the voltage to the second amplitude value is delayed by a time delay T relative to the signal transmitted to the third terminals A1 / C1 and A2 / C1 (curve 100).

[0080] Thus, when the voltage on the control terminals 14 and 16 disappears, the actuator of the first circuit breaker device C1 is immediately de-energized. On the other hand, due to the delay imposed by the electronic circuit 8, the actuator of the second circuit breaker device C2 continues to be energized during the time delay T and stops being energized when the time delay T expires.

[0081] According to an example, the duration of the time delay T is between 5 ms and 50 ms, inclusive.

[0082] For example, the electronic circuit 8 comprises one or more passive components which make it possible to delay the transmission of the opening command to the fourth terminals A1 / C1 and A2 / C1, that is to say to keep the voltage between the fourth terminals A1 / C1 and A2 / C1 equal to the first amplitude value within the time delay T after the voltage between the control terminals 14, 16 is interrupted.

[0083] For example, the electronic circuit 8 comprises a capacitor connected between the terminals 14, 16 and the fourth terminal, which capacitor is suitable for maintaining the voltage between the fourth terminals A1 / C1 and A2 / C1 (but not between the third terminals A1 / C1 and A2 / C1) equal to the first amplitude value within the time delay T once the voltage between the control terminals 14, 16 is interrupted.

[0084] The interconnection device 6 enables the modular combination of two or more circuit-breaker devices C1 , C2 to form an electrical system 2 suitable for interrupting DC currents having an intensity and / or a voltage higher than the rating of each of said circuit-breaker devices C1 , C2 , respectively.

[0085] As an illustrative and non-limiting example, each circuit breaker device C1 and C2 has a rated voltage of 300 V DC and a rated current of 32 amperes (A). Thanks to the device 6, the system 2 formed by the combination of the circuit breaker devices C1 and C2 is able to interrupt the current even for voltages greater than 300 V DC, for example for voltages up to 1000 V DC and currents up to 75 A.

[0086] The device 6 is pre-assembled, making it easier to connect the circuit breaker devices C1 and C2 to form the system 2. The user does not need to manually wire all connections between the circuit breaker devices C1 and C2, thereby saving time and limiting connection errors that may occur during manual wiring installation.

[0087] Therefore, users can build a system 2 suitable for their requirements based on the existing circuit breaker devices C1, C2.

[0088] By connecting the second contacts 50, 52, 54, 56, 58, 60, 62 and 64 in series between the terminals 10 and 12, the current is more easily interrupted because the greater the number of second contacts connected in series, the greater the voltage drop at each second contact. When interrupting the current, there is less risk that the arc will remain at the level of only one second contact 50, 52, 54, 56, 58, 60, 62 or 64.

[0089] By connecting the first contacts 40, 42, 44 and the second contacts 50, 52, 54, 56, 58, 60, 62 and 64 in parallel between the terminals 10 and 12, when the system 2 is in operation, the current flowing in the second contacts 50, 52, 54, 56, 58, 60, 62 and 64 is reduced, limiting heat dissipation.

[0090] The device 6 thus enables the system 2 to be configured with a good compromise between interruption power and heat dissipation.

[0091] When the opening command is received, the delay of opening the second contacts 50, 52, 54, 56, 58, 60, 62 and 64 enables the first contacts 40, 42, 44 to be opened before the second contacts. In fact, since the current that can be used by the system 2 exceeds the rating of the circuit breaker device C1 and the first contacts 40, 42, 44 are connected in parallel, if the second contacts 50, 52, 54, 56, 58, 60, 62 and 64 are opened before the first contacts 40, 42, 44, the first contacts 40, 42, 44 may not be able to interrupt the current by themselves.

[0092] Many other embodiments are possible. In particular, the above teachings can be transferred to many different circuit breaker devices or circuit breaker devices comprising a different number of contacts or a different geometric configuration than described, or again to circuit breaker devices having normally closed contacts instead of normally open contacts.

[0093] The embodiments and variations envisaged above can be combined with one another to produce new embodiments.

Claims

1. An interconnection device (6), characterized in that: include: - a first terminal (L1 / C1, T1 / C1, L2 / C1, T2 / C1, L3 / C1, T3 / C1) configured to be electrically connected to a first electrical contact (40, 42, 44) of a first device (C1) for interrupting an electric current; - a second terminal (L1 / C2, T1 / C2, L2 / C2, T2 / C2, L3 / C2, T3 / C2, 13NO / C2, 14NO / C2, 53NO, 54NO, 63NO, 64NO, 73NO, 74NO, 83NO, 84NO) configured to be electrically connected to a second electrical contact (50, 52, 54, 56, 58, 60, 62, 64) of a second device (C2) for interrupting an electric current; - a third terminal (A1 / C1, A2 / C1) configured to be electrically connected to a first actuator for actuating the first circuit breaker device; - a fourth terminal (A1 / C2, A2 / C2) configured to be electrically connected to a second actuator for actuating a second circuit breaker device; - input terminals (10), output terminals (12) and control terminals (14, 16); - a first circuit connecting the input and output terminals to the first terminal and the second terminal to electrically connect the first and second electrical contacts of the first and second circuit breaker devices between the input and output terminals; - a second circuit connecting the control terminal to the third and fourth terminals to distribute the control signal applied between the control terminals (14, 16) to the third terminal (A1 / C1, A2 / C1) and the fourth terminal (A1 / C2, A2 / C2), the second circuit also comprising an electronic circuit (8) connected between the control terminal and the fourth terminal, the electronic circuit being configured to transmit the control signal for opening the electrical contact received from the control terminal to the fourth terminal with a predetermined time delay (T), The interconnection device (6) is preassembled and comprises a support (18) on which a first terminal (L1 / C1, T1 / C1, L2 / C1, T2 / C1, L3 / C1, T3 / C1), a second terminal (L1 / C2, T1 / C2, L2 / C2, T2 / C2, L3 / C2, T3 / C2, 13NO / C2, 14NO / C2, 53NO, 54NO, 63NO, 64NO, 73NO, 74NO, 83NO, 84NO), a third terminal (A1 / C1, A2 / C1) and a fourth terminal (A1 / C2, A2 / C2), an input terminal (10), an output terminal (12) and a control terminal (14, 16) are mounted, and the first and second circuits are integrated into the support.

2. The interconnection device (6) according to claim 1, characterized in that The support member (18) is made of plastic.

3. The interconnection device (6) according to claim 2, characterized in that The support member (18) is made of molded plastic.

4. The interconnection device (6) according to any one of claims 1 to 3, characterized in that The first circuit is configured to electrically connect first electrical contacts (40, 42, 44) in parallel between input and output terminals (10, 12).

5. The interconnection device (6) according to any one of claims 1 to 3, characterized in that The first circuit is configured to electrically connect the second electrical contacts (50, 52, 54, 56, 58, 60, 62, 64) in series with each other and in parallel with the first electrical contacts (40, 42, 44) between the input and output terminals (10, 12).

6. The interconnection device (6) according to any one of claims 1 to 3, characterized in that The control signal for opening includes a transition of a voltage applied to the control terminal (14, 16) from a first amplitude value to a second amplitude value lower than the first amplitude value, and the electronic circuit (8) is configured to provide a delayed control signal (102) to the fourth terminal (A1 / C2, A2 / C2), wherein the transition of the voltage to the second amplitude value is delayed by a time delay (T) relative to the control signal (100) transmitted to the third terminal (A1 / C1, A2 / C1).

7. The interconnection device (6) according to any one of claims 1 to 3, characterized in that The duration of the time delay (T) is in the range of 5 ms to 50 ms.

8. An electrical system (2), characterized in that include: - a first device (C1) for interrupting an electric current, comprising a first electrical contact (40, 42, 44) and a first actuator, the first actuator being configured to switch the first electrical contact between an open state and a closed state in response to a control signal; - a second device (C2) for interrupting an electric current, comprising a second electrical contact (50, 52, 54, 56, 58, 60, 62, 64) and a second actuator, the second actuator being configured to switch the second electrical contact between an open state and a closed state in response to a control signal; - An interconnection device (6) according to any one of claims 1 to 7; In the system, an interconnection device (6) is connected to the first and second circuit breaker devices, a first terminal (L1 / C1, T1 / C1, L2 / C1, T2 / C1, L3 / C1, T3 / C1) is connected to the first electrical contact (40, 42, 44), a second terminal (L1 / C2, T1 / C2, L2 / C2, T2 / C2, L3 / C2, T3 / C2, 13NO / C2, 14NO / C2, 53NO, 54NO, 63NO, 64NO, 73NO, 74NO, 83NO, 84NO) is connected to the second electrical contact (50, 52, 54, 56, 58, 60, 62, 64), a third terminal (A1 / C1, A2 / C1) is connected to the first actuator, and a fourth terminal (A1 / C2, A2 / C2) is connected to the second actuator.

9. The electrical system (2) according to claim 8, characterized in that The first electrical contact (40, 42, 44) and the second electrical contact (50, 52, 54, 56, 58, 60, 62, 64) are normally open type contacts.

10. The electrical system (2) according to claim 9, characterized in that The first and second circuit breaker devices (C1, C2) are adapted to interrupt a DC current.

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