Adapter module, adapter system and power supply system for electrical installations

Abstract

An adapter module comprises a plurality of first connection terminals for connection to an electric circuit comprising at least one load, a relevant control push-button and a reset push-button. The adapter module further comprises a plurality of second connection terminals configured to connect the adapter module to an electromechanical relay and a control circuit which includes a monostable relay and a plurality of passive electronic devices. The monostable relay comprises a first control device and a first switch and is configured so as to take up a rest configuration, in which the first control device is switched off and the first switch is open, and an operative configuration, in which the first control device is switched on and the first switch is closed. The control circuit is configured in such a manner that, following the actuation of the reset push-button, there is allowed a passage of electric current in the first switch only when the monostable relay is in the operative configuration, and, following the actuation of the control push-button, a passage of electric current takes place both when the monostable relay is in the operative configuration and when it is in the rest position.

Description

[0001] ADAPTER MODULE, ADAPTER SYSTEM AND POWER SUPPLY SYSTEM FOR ELECTRICAL INSTALLATIONS

[0002] DESCRIPTION

[0003] The present invention relates to an adapter module for electromechanical relays. In particular, the present invention relates to an adapter module for integrating operational functionalities in an existing relay of the electromechanical type with logic control functions for the electrical loads, such as, for example, reset, wherein all the electrical loads which are connected are disconnected from the electric power supply .

[0004] Relays are devices which, when they are controlled by means of a power supply circuit, bring about a variation in one or more circuits. A particular category of relay is defined as being electromechanical as a result of the operating principle thereof, in particular they are devices comprising an electromagnet, such as, for example, a coil, the magnetic field of which, when it is subjected to current variations, for example, by means of variations of the power supply upstream of the circuit, modifies the positioning thereof involving the triggering of one or more switches, which consequently modify the layout of the relevant circuit. Typically, if there is encountered the need for controlling from several positions of an electrical installation the circuit to which the relay is connected, such as, for example, for a lighting installation of a domestic or industrial consumer, there are used relays of the latching type. Furthermore, a different type of relay is electronic, that is to say, relays provided with circuit components in the solid state of the active type, which can be controlled in terms of voltage or current and which rapidly and reliably allow control of a plurality of loads by means of one or more control points. In the present description and in the claims appended thereto , a number of terms and expressions are considered to take up , unless di f ferent explicit indications are set out , the signi ficance expressed in the following definitions .

[0005] The term "electrical continuity" between a pair of components in a circuit is intended to be understood to mean that the circuit has a conductive path through which electric current can flow .

[0006] The term "connection" and generally the verb "connect" in relation to an electric / electronic circuit or component are intended to be understood to mean the j oining and the action of j oining two or more nodes of an electric or electronic circuit , respectively .

[0007] The term "disconnection" and generally the verb "di sconnect" in relation to an electric / electronic circuit or component are intended to be understood to mean the separation and the action of separating two or more nodes of an electric or electronic circuit , respectively .

[0008] The term "push-button" is intended to be understood to mean an element which is configured to temporarily modi fy the state of the branch of the circuit in which it is installed . Basically, it acts as a control element which is capable of closing the individual terminals when it is actuated . The term "push-button" includes both a physical element which can be actuated manually by a user, for example , a button, and elements which can be actuated remotely and which in any case close terminals temporarily when actuated . When a "push-button" is actuated, therefore , it means that the terminals thereof are closed .

[0009] The term "operatively connected" is intended to be understood to mean a connection between two or more devices or elements , which are both connected by means of modi fications to the configuration of the circuit and coordinated to perform a function, exchanging signals and / or instructions between them . The term "adapter module" is intended to be understood to mean an additional component which can be connected to an electric system which is already in existence and which can be suitably controlled in order to implement new logic functions in the electric system to which it is connected or to make the control thereof by a user easier . Therefore , the adapter module can be installed as an additional component with respect to other elements which, in the absence of the addition of the module , would not be provided with the same functionalities , though being usable elements , in the absence of the adapter module , for di f ferent obj ects or functions .

[0010] The term "connection terminals" or more generally simply the term "terminal" is intended to be understood to mean physical means , via which a component can be connected to another component , such as , for example , clamps or connectors . Particularly, the connection terminals allow signals to be transmitted between the components which connect and are used by an installer or user during the installation step of the component for connecting it to other elements which form an installation, a circuit or other type of system .

[0011] The term "reset" is intended to be understood to mean a logic function with which all the electrical loads which are connected to an electric power supply source are disconnected . Therefore , the Applicant has perceived the requirement to provide the existing electrical installations which are provided with relays with additional functionalities .

[0012] In the context of such a requirement , the Applicant has reali zed that the possibility of disconnecting a plurality of loads by actuating a single control point may simpli fy the ways of using the installation .

[0013] Furthermore , these requirements are particularly perceived when the same line supplies power to a large number of electric loads which, in accordance with the requirements of the users , can all be supplied with power, partially or individually . The Applicant has also perceived the need to provide a solution which uses components which are highly ef fective but of low cost .

[0014] The technical problem forming the basis of the present invention is therefore to provide an adapter module which i s structurally and functionally configured to at least partially overcome one or more of the disadvantages set out with reference to the cited prior art .

[0015] In the context of this problem, an obj ect of the present invention is to provide an adapter module for electromechanical relays comprising the logic reset function . In particular, the logic reset function is directed towards the possibility of switching of f a plurality o f electrical loads by actuating a single control point .

[0016] An additional obj ect of the present invention is to provide an adapter module for electromechanical relays comprising only electronic components of the passive type .

[0017] An obj ect of the present invention is to provide an adapter module which signals the presence of electrical loads which are switched on .

[0018] Another obj ect of the present invention is to provide an adapter module which is economical and certainly reliable to use .

[0019] This problem is solved and at least one of these obj ects is at least partially achieved by the invention, in a first aspect , by means of an adapter module which comprises a plurality o f first connection terminals which are configured to connect the adapter module to an electric circuit . Preferably, the electric circuit comprises at least one load, a relevant control pushbutton and a reset push-button . Preferably, the adapter module comprises a plurality of second connection terminals which are configured to connect the adapter module to an electromechanical relay .

[0020] Preferably, the adapter module comprises a control circuit which includes a monostable relay and preferably a plurality of passive electronic devices which are operatively interconnected to the monostable relay . Preferably, the first and second connection terminals being connected to the control circuit .

[0021] Preferably, the monostable relay comprises a first control device .

[0022] Preferably, the monostable relay comprises a first switch which is actuated by the first control device .

[0023] Preferably, the relay is configured so as to take up a rest configuration, in which the first control device is switched of f and in which the first switch is open . Preferably, the relay is configured so as to take up an operative configuration, in which the first control device is switched on and the first switch is closed .

[0024] Preferably, the control circuit is configured in such a manner that , following the actuation of the reset push-button, there is allowed a passage of electric current in the first switch only when a monostable relay is in the operative configuration . Preferably, the control circuit is configured in such a manner that , following the actuation of the control push-button, a passage of electric current takes place both when the monostable relay is in the operative configuration and when it is in the rest configuration .

[0025] Preferably, the plurality of first connection terminals comprise a reset terminal and / or a control terminal .

[0026] Preferably, the plurality of second connection terminals comprise an additional terminal . Preferably, the control circuit is configured in such a manner that , following the actuation of the reset push-button, a passage of electric current is allowed in the first switch in such a manner that the reset terminal is in electrical continuity with the additional connection terminal only when the monostable relay is in the operative configuration .

[0027] Preferably, the control circuit is configured in such a manner that , following the actuation of the control push-button, the control terminal is in electrical continuity with the additional terminal both when the monostable relay is in the operative configuration and when the monostable relay is in the rest configuration .

[0028] As a result of these features , it is possible to control an electric power supply circuit by means of an adapter module so as to selectively switch on an electromechanical relay . As a result of these features , it is possible to connect the adapter module to an existing electromechanical relay .

[0029] This is because , as mentioned above , the control circuit is advantageously configured in such a manner that , following the actuation of the reset push-button, there is allowed a passage of electric current in the first switch only when a monostable relay is in the operative configuration in such a manner that the at least one load, or all the electrical loads connected to the adapter module i f a plurality of loads are present , is / are switched of f , that is to say, disconnected from the electric power supply by means of which they are actuated .

[0030] On the basis of an additional aspect, the present invention also relates to an adapter system for performing a reset function in a plurality of electromechanical relays .

[0031] Preferably, the adapter system comprises a plurality of adapter modules which are constructed according to the preceding aspect and a reset device comprising a reset push-button which i s configured to simultaneously actuate each electromechanical relay .

[0032] As a result of these features , the adapter system i s implemented with a reset logic function . As a result of these features , the adapter system can be interconnected to a plurality of electromechanical relays .

[0033] Based on a third aspect , the present invention relates to a power supply system for electrical installations comprising a plurality of electromechanical relays which are configured to actuate respective electrical loads .

[0034] Preferably, each electromechanical relay comprises a second switch and a second control device for opening and closing the second switch .

[0035] Preferably, each relay is associated with a control device , each one comprising a relevant control push-button which is configured to independently actuate each second control device so as to open or close the relevant second switch in order to switch on or of f the respective electrical load .

[0036] Preferably, the power supply system comprises at least one electric power supply source and an adapter system according to the preceding aspect .

[0037] As a result of these features , the power supply system selectively supplies the electromechanical relays by implementing set and reset logic arrangements for all the loads interconnected to the relevant electromechanical relays .

[0038] The adapter system and the power supply system according to the preceding aspects also allow the same advantages set out with reference to the first aspect to be af forded .

[0039] The invention, as defined by each of the preceding aspects , may have one or more of the following additional features .

[0040] Preferably, the passive electronic devices are diodes . This feature allows the costs of the adapter module to be contained, though orientating the currents of the power supply system in a suitable manner .

[0041] Preferably, the passive electronic devices comprise a first diode which is interconnected in series between the reset pushbutton and the first switch and which is polari zed so as to allow the passage of electric current from the reset pushbutton to the first switch .

[0042] According to embodiments of the invention, the plurality of passive electronic devices comprise a first diode . Preferably, the first diode is connected in series to the reset pushbutton . According to embodiments of the invention, the first diode has the anode orientated towards the reset push-button . These features allow the unidirectional current flow in the reset push-button .

[0043] Preferably, the passive electronic devices comprise a second diode which is connected in parallel with the first switch and which is counter-polari zed with respect to the first diode . According to embodiments of the invention, the first diode and the second diode have a common cathode . These features al low the definition of an alternative path for the electric current , particularly preventing the second control device from being switched on, actuating the reset push-button when the monostable relay takes up the rest configuration with the first switch open .

[0044] They also allow the second control device to be switched on, actuating the reset push-button when the monostable relay takes up the operative configuration with the first switch closed . In this manner, switching on the relevant second control device is allowed for the reset push-button only i f the respective electric load is switched on, switching of f only all the loads which are switched on . These features also allow the control push-button to switch on the second control device independently of the configuration taken up by the monostable relay .

[0045] Preferably, the first diode , the second diode and the first switch have a common node . According to embodiments of the invention, the common node coincides with the anode of the first diode and / or the anode of the second diode .

[0046] Preferably, the passive electronic devices comprise a third diode which is interconnected in series to the first control device . As a result of this feature , the unidirectional passage of current in the first control device is allowed .

[0047] Preferably, the adapter module comprises an electrical resistance which is interconnected in series to the first control device .

[0048] Preferably, the connection module comprises an additional resistance which is interconnected in series to the first switch .

[0049] As a result of these features , it is possible to limit the excess voltages while the f irst control device and / or the first switch is / are switched on and of f .

[0050] Preferably, the reset device comprises a signalling device which is connected in parallel to the reset push-button .

[0051] Preferably, the reset device comprises a fourth diode which is polari zed so as to allow electric current to pass towards the first switch and which is connected in series to the signalling device , the signalling device and the fourth diode being completely in parallel with respect to the reset push-button . These features allow the presence of electrical loads to be signalled only i f switched on .

[0052] Preferably, the signalling device is an indicator light . This feature allows a user to conveniently identi fy the presence of switched-on electric loads . Preferably, the control device comprises a second signalling device which is connected in parallel to the control pushbutton .

[0053] Preferably, the control device comprises a fi fth diode which is polari zed so as to allow electric current to pass towards the first switch and which is connected in series to the second signalling device , the second signalling device and the fi fth diode being completely in parallel with respect to the control push-button .

[0054] These features allow signalling of the presence of individual electric loads which are switched on in the power supply system . Preferably, the second signalling device is an indicator light . This feature allows a user to conveniently identi fy the individual electric load switched on .

[0055] Preferably, the adapter system comprises a plurality of reset devices . As a result of this feature, a user has access from a plurality of points to a push-button for switching of f al l the electric loads which are interconnected to the power supply system .

[0056] Preferably, the power supply source comprises a phase line and a neutral line , preferably the phase line switches on the power supply system by being interconnected between the second switch and the second control device of the relevant electromechanical relay .

[0057] This feature allows the logic control functions of the power supply system to be made operatively independent , in particular set , reset and actuation by means of the control push-button of the relevant electrical load .

[0058] According to one embodiment o f the invention, the second switch, the first control device and the electrical load are switched on by a first power supply source . Preferably, the first power supply source operates at a first electric power supply voltage . Preferably, the second control device, the switch, the reset device and the control device are switched on by a second power supply source . Preferably, the second power supply source operates at a second electric power supply voltage . Preferably, the first power supply voltage and the power supply voltage are di f ferent .

[0059] These features allow the power supply system to operate at di f ferent voltages , thereby mutually insulating the circuits and si zing the relevant components for the ef fective operating voltages , thereby avoiding over-dimensions .

[0060] Additional features and advantages of the invention will be better appreciated from the description of the adapter for electromechanical relays for installations and the power supply system to which the invention relates and which are illustrated by way of non-l imiting example in the appended drawings , in which :

[0061] Figure 1 illustrates a circuit diagram of the electric adapter to which the present invention relates ;

[0062] - Figure 2 illustrates an embodiment of the electric system to which the present invention relates ;

[0063] - Figures 3 and 4 illustrate an additional embodiment of the electric system and the electric adapter to which the invention relates , respectively .

[0064] In Figures 1 and 2 , the adapter system for electromechanical relays is designated 1 , the adapter module is designated 10 , and the power supply system according to the present invention is designated 30 .

[0065] The power supply system 30 comprises a plurality of relays 100 of the electromechanical type of the latching type , a power supply line A implicitly comprising a phase line L and a relevant neutral line N of the electric current , a plurality of control devices P, each one being configured for actuating a relevant relay 100 which is connected to a respective electrical load Z and to the adapter system 1 , as will be described in greater detail below .

[0066] In preferred embodiments , the adapter module 10 comprises a plurality of connection terminals 21 , 23 , 24 , 25 which are configured to connect the same adapter module 10 to an electric circuit 200 comprising a relevant electrical load Z , a respective control device P and a reset device R . Preferably, the adapter module 10 comprises second connection terminals 31 , 32 , 33 which are configured to connect the same adapter module 10 to the relevant electromechanical relay 100 .

[0067] As illustrated, for example , in Figure 1 , in some embodiments the adapter module 10 comprises a control circuit 12 comprising a monostable relay 11 and a plurality of passive electronic devices DI , D2 , D3 .

[0068] Each adapter module 10 is interconnected between the relevant relay 100 and the respective control devices P so as to integrate the conventional operation thereof with di f ferent logic control arrangements for supplying the relevant electrical loads Z in a versatile manner .

[0069] It may be observed that each control device P comprises a respective control push-button 104 for actuating the relevant electromechanical relay 100 so as to switch on or of f the respective electrical load Z .

[0070] The electrical loads Z are , for example , identi fiable as lighting apparatuses both in the residential and in the industrial field, though it is evident that the same concepts may also be applied in the case of other loads , such as , for example , the actuation system of a motori zed shutter .

[0071] Each electrical load Z is connected to the power supply line A by means of the relay 100 , respectively, which alternately switches it on or of f in accordance with the logic control arrangements which will be described in detail below . Each electrical load 100 advantageously comprises a control device T2 and a respective switch 12 which is actuated thereby and therefore controlled thereby . As will be set out in greater detail below, the present invention can use additional control devices and relevant switches and consequently the control device T2 and the respective switch 12 of the electromechanical relay 100 will be indicated as the secondary control device T2 and secondary switch 12 .

[0072] In preferred embodiments , the second control device T2 i s an electromagnet which, when it is supplied by means of the electric current passage , alternately triggers the closure or opening of a contact of the second switch 12 . As illustrated in Figure 1 , the phase line L is connected to each electromechanical relay 100 between the second switch 12 and the second control device T2 .

[0073] Furthermore , each relevant electrical load Z is connected in series to the relevant secondary switch 12 of the respective electromechanical relay 100 and further interconnected to the neutral line N .

[0074] Advantageously, the adapter system 1 of the present invention may comprise one or more reset devices R, each of which i s operatively interconnected to each electromechanical relay 100 by means of respective adapter modules 10 .

[0075] In preferred embodiments , the reset device R further comprises a reset push-button 101 which is interconnected completely in parallel with respect to the series connection of a signalling device 102 , which may be present , and a respective diode D4 . Preferably, each adapter module 10 is alternately configured to allow or prevent the flow of electric current in the second control device T2 . Each monostable relay 11 comprises a first control device T1 and a first switch I I which is actuated by the first control device T1 and therefore controlled thereby . The monostable relay 11 is , for example , formed by an optotriac The operation of the monostable relay 11 provides for a rest configuration and an operative configuration . Advantageously, according to the rest configuration, the first control device T1 is not switched on and the first switch I I is open . While , according to the operative configuration, the control device T1 is switched on and actuates the first switch I I which i s closed .

[0076] The first control device T1 is preferably connected in parallel to the relevant electrical load Z so as to be always switched on i f the relevant electrical load Z is switched on, that is to say, i f the switch 12 is closed .

[0077] In preferred embodiments , the control circuit 12 comprises a third diode D3 which is interconnected in series to the relevant first control device T 1 so as to allow the passage o f electric current in one direction .

[0078] In some embodiments , the control circuit 12 comprises a first diode DI which is interconnected in series between the reset device R and the first switch I I . The first diode DI i s advantageously polari zed so as to allow the passage of electric current only in the direction from the reset device R to the first switch 11 , that is to say, so as to allow the passage of electric current from the reset device R to the second control device T2 . Each adapter module 10 also comprises a second diode D2 which is connected in parallel to the first switch I I and which is polari zed so as to allow the passage of electric current from the second control device T2 to the relevant control device P . In some embodiments , the second diode D2 is counter-polari zed with respect to the first diode DI and interconnects the second control device T2 to the relevant control device P even when the monostable relay I I takes up the rest configuration, that is to say, when the first switch I l is open . Advantageously, each control device P comprises a signalling device 103 and a fi fth diode D5 which are mutually provided in series and completely in parallel with respect to the relevant control push-button 104 .

[0079] In some embodiments , as illustrated in Figure 1 , the first switch I I , the second diode D2 , the first diode DI and the control push-button P share a common node C so as to allow, as a result of the mutual counter-polari zation between the first diode DI and the second diode D2 and the alternation between the rest position and the operative position of the monostable relay, the alternating passage o f electric current in the first diode DI or in the second diode D2 in accordance with the configuration taken up by the monostable relay 11 and also as a function of the actuation of the reset push-button 101 or the actuation of the relevant control push-button 104 .

[0080] According to the described configuration of the circuit diagram of the adapter module 1 , the adapter system 1 and the power supply system 30 , the actuation o f the first push-button 101 may allow the passage of electric current for switching on the second control device T2 only i f the monostable relay 11 takes up the operative configuration, that is to say, i f the switch I l is closed, that is to say, only i f the switch 12 is closed and allows the relevant load Z to be switched on .

[0081] In fact , the relevant second control device T2 of the relevant electromechanical relay 100 has to be switched on by actuating the reset push-button 101 only when the relevant electrical load Z is ef fectively switched on by the electric power supply source A.

[0082] I f instead the reset push-button 101 is actuated with a monostable relay 11 taking up the rest configuration, that is to say when the relevant electrical load Z is not switched on, then the second control device T2 cannot be switched on because the first switch I I is open .

[0083] The operation of the adapter 1 of the power supply system 30 according to the present invention is described below .

[0084] By way of example , there may be considered an initial condition, in which the second switch 12 , the control push-button 104 of the relevant control devices P and the reset push-button 101 are all open .

[0085] By actuating a control push-button 104 , there is electric current from the supply line L which switches on the second control device T2 , flowing in the second diode D2 and passing through the same control push-button 104 , closing at the return line N in known manner .

[0086] The extemporaneous switching-on o f the second control device T2 involves the closure of the second switch 12 . The closure of the second switch 12 allows the supply line L to simultaneously switch on the relevant load Z and consequently the first control device T1 which is interconnected thereto in parallel . The power supply o f the first control device T 1 causes the monostable relay 11 to take up the operative configuration in which the first switch I I is closed, thereby providing an additional path, with respect to the path provided by the second diode D2 , for the current passage .

[0087] By again actuating the control push-button 104 of an electromechanical relay, switching on a relevant electrical load Z , the second power supply device T2 is switched on and therefore the second switch 12 is opened, moving the monostable relay 11 into the rest configuration in which the switch I I i s open .

[0088] The provision of the signalling device 102 in parallel with respect to the reset push-button 101 and the signalling device 103 in parallel with each relevant control push-button 104 allows the transmission of relevant signals , for example , of the light-emitting type . In particular, the signalling device 103 which may, for example , be formed by an LED which is mounted on the control push-button itsel f , is actuated automatically i f the relevant electrical load Z is switched on by the relevant electromechanical relay 100 . At the same time , the signalling device 102 which can also be , for example , formed by an LED which is mounted on the reset push-button itsel f is actuated automatically i f any electrical load Z i s switched on .

[0089] By actuating the reset push-button 101 , the relevant second control devices T2 of the relays 100 are switched on only i f the relevant monostable relay 11 takes up the operative configuration . In particular, i f the monostable relay 11 takes up the rest configuration, that i s to say, the first switch I I is open, there is no closure of the circuit from the second control device T2 to the reset push-button 101 which i s actuated and the electric current cannot pass through the second diode D2 because it is counter-polari zed .

[0090] In particular, i f the monostable relay 11 takes up the operative configuration, that is to say, the first switch I I is closed, the reset push-button 101 which is actuated allows each relay 100 , that is to say, each second control device T2 , to be switched on, thereby controlling the disconnection of each electrical load Z from the power supply source A. According to a preferred embodiment of the invention illustrated in Figure 4 , the power supply system 30 is supplied with power from a first power supply source Al and a second power supply source A2 which operate at a first voltage VI and at a second voltage V2 which are di f ferent from each other . Preferably, each first control device T1 of the relevant monostable relay 11 , each second switch 12 of the relevant relay 100 , each electrical load Z and each third diode D3 operate at the first operative voltage VI and are supplied with power from the first power supply source Al . The operation follows what has been described above , in particular the circuit supplied with power from the power supply source A2 acts as a circuit simply for controlling the circuit supplied with power from the power supply source Al , which does or does not switch on the relevant load Z which is connected to the respective electromechanical relay 100 .

Claims

Claims1. An adapter module (10) comprising:- a plurality of first connection terminals (21, 23, 24, 25) comprising a reset terminal (25) and a control terminal (23) , the plurality of connection terminals (21, 23, 24, 25) being configured to connect the adapter module (10) to an electric circuit (200) comprising at least one load (Z) , a relevant control push-button (104) and a reset push-button (101) ;- a plurality of second connection terminals (31, 32, 33) comprising an additional terminal (33) , the plurality of second connection terminals (31, 32, 33) being configured to connect the adapter module (10) to an electromechanical relay (100) ;- a control circuit (12) which includes a monostable relay (11) and a plurality of passive electronic devices (DI, D2, D3) which are operatively interconnected to the monostable relay (11) , the first and second connection terminals being connected to the control circuit (12) ; wherein the monostable relay (11) comprises a first control device (Tl) and a first switch (II) which is actuated by the first control device (Tl) , the monostable relay (11) being configured so as to take up a rest configuration, in which the first control device (Tl) is switched off and in which the first switch (II) is open, and an operative configuration, in which the first control device (Tl) is switched on and the first switch (II) is closed; the control circuit (12) being configured in such a manner that, following the actuation of the reset push-button (101) , there is allowed a passage of electric current in the first switch (II) in such a manner that the reset terminal (25) is in electrical continuity with the additional terminal (33) only when the monostable relay (11) is in the operative configuration,the control circuit (12) being further configured in such a manner that, following the actuation of the control push-button (104) , the control terminal (23) is in electrical continuity with the additional terminal (33) both when the monostable relay (11) is in the operative configuration and when it is in the rest configuration.

2. An adapter module (10) according to claim 1, wherein each plurality of passive electronic devices (DI, D2, D3) comprises a first diode (DI) which is interconnected in series with respect to the reset push-button (101) and which has the relevant anode orientated towards the reset push-button (101) .

3. An adapter module (10) according to claim 2, wherein each plurality of passive electronic devices (DI, D2, D3) comprises a second diode (D2) which is connected in parallel with the first switch (II) and which is counter-polarized with respect to the first diode (DI) .

4. An adapter module (10) according to claim 3, wherein the first diode (DI) and the second diode (D2) have a common cathode (C) .

5. An adapter module (10) according to claim 3, wherein the first diode (DI) , the second diode (D2) and the first switch (II) have a common node (C) .

6. An adapter module (10) according to any one of the preceding claims, wherein each plurality of passive electronic devices (DI, D2, D3) comprises a third diode (D3) which is connected in series to the control device (Tl) .

7. An adapter system (1) for performing a reset function in a plurality of electromechanical relays (100) which comprises:- a reset device (R) comprising a reset push-button (101) which is configured to simultaneously actuate each electromechanical relay (100) ;- a plurality of adapter modules (10) which are constructed according to any one of the preceding claims, wherein each ofthe adapter modules (10) is configured to be operatively interconnected between each electromechanical relay (100) and the reset device (R) .

8. An adapter system (1) according to any one of the preceding claims, wherein the reset device (R) comprises a signalling device (102) which is connected in parallel with the reset push-button (101) .

9. An adapter system (1) according to claim 7, wherein the reset device (R) comprises a fourth diode (D4) which is polarized so as to allow the passage of electric current towards the first switch (II) and which is connected in series to the signalling device (102) , the signalling device (102) and the fourth diode (D4) being completely in parallel with respect to the reset push-button (101) .

10. An adapter system (1) according to claim 7 or 8, wherein the signalling device (102) comprises an indicator light.

11. A power supply system (30) for electrical installations comprising :- a plurality of electromechanical relays (100) which are configured to actuate respective electrical loads (Z) , each relay (100) comprising a second switch (12) and a second control device (T2) for opening and closing the second switch (12) , each relay (100) further being associated with a control device (P) , each one comprising a relevant control push-button (104) which is configured to independently actuate each second control device (T2) so as to open or close the relevant second switch (12) in order to switch on or off the respective electrical load (Z) ;- at least one electric power supply source (Al, A2 ) ;- an adapter system (1) according to any one of claims 6 to 9.

12. A power supply system (30) according to the preceding claim, wherein the second switch (12) , the first control device (Tl) , the electrical load (Z) are supplied by a first power supplysource (Al) which operates at a first electrical voltage (VI) , and wherein the second control device (T2) , the first switch (II) , the reset device (R) , the control device (P) are supplied by a second power supply source (A2) which operates at a second electrical voltage (V2) .

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