Description The invention refers to the field of electronics / electrical and relates to a method and device which applies the method, by which the amount of the electrical leakage of a circuit is detected, while regulating its leakage level in the electrical installation, in compliance with the global safety standards governing the electrical installations.

The problem solved by this invention is to prevent the current from passing through a person's body thus protecting his/her life, where voltage current up to 30Vcan cause a small shock, but larger ones may, under certain circumstances, can even cause death. According to the present state of the art, for decades, the use of a Residual Current Device (RCD) that interrupts the power supply in the event of an electrical current leakage, typically <= 30 mA, has been internationally decided. This amount of leakage is the global norm for the smoothest operation with the least problems that can exist inside an electrical grid. The Residual Current Devices (RCD) based on the Kirchhoff voltage law offer only supplementary protection. Since the passing of electric current through the human body is ruled by the law of Ohm: I=V R and the current intensity depends on the resistance of the human body, which ranges from 5 kCl to 100 kQ., depending on the position of the body and the type of contact with the conductor, the safety limit is set to 10 mA. The application of the invention enables the amperage to be adjusted within the safety margin by eliminating the lethal hazard.

Other applications of the state of the art have attempted to solve the above problem, such as JP H09 171047 A, which is intended to measure the circuit's leakage and interruption. However, this application works only in a three phase circuit and measures the leakage current of the circuit to which it is directly connected via the A D converter to indicate this leakage to the indicator. It also acts as a relay for protection, thus interrupting the circuit when a leakage current exceeds a specified value, unlike the present invention, whereas the indication demonstrates the leakage current generated in the circuit to which it is connected. In JP H09 171047 A, the leakage current is generated by a series circuit with resistor and capacitor, resulting in the generation of a capacitive current which can be varied in conjunction with the other loads of the installation thereby changing the interrupt point of the Residual Current Device (RCD). On the contrary, this technical feature is absent form the present invention where the leakage current is constant, i.e. only by resistors, so it does not depend on the nature of the rest of the installation load. JP H09 171047 A measures the leakage of the circuit and its interrupt point, in contrast to the present invention, which operates by causing an artificial leak in order to activate the Residual Current Device (RCD). Also, JP H09 171047 A is connected by interrupting the current of the circuit, unlike the present invention connected in parallel to the circuit without interruption and as a result the Residual Current Device (RCD) does the interrupting of the circuit's electric current. Also, JP H09 171047 A, measures the leakage current of the circuit to which it is directly connected via an A/D converter and shows this leakage to the indicator, in contrast to the present invention which indicates the artificial leak that generates in the circuit to which it is connected. So they are two different inventive ideas, introducing different ways of solving the same problem. Finally, JP H09 171047 A operates in a three-phase circuit, in contrast to the present invention operating in a single-phase.

The invention described in AU 61703 80 A attempts to create artificial leakage through a series circuit with resistor and capacitor resulting to the generation of capacitive current which, in conjunction with the other loads of the system, can be varied whenever the Residual Current Device (RCD) interrupts the current of the circuit. In this patent, the leakage sensitivity regulator is mechanical, there is no clear indication of the leakage current and the setting is without a clear gradient, contrary to the present invention where there is a clear indication of the leakage current. In addition, in the present invention the leakage current is generated by a series circuit with resistor and capacitor, resulting in capacitive current generation which can be varied in conjunction with the other loads of the installation and the switching point of the Residual Current Device (RCD), making it dependent on the nature of the rest load of the installation. In AU 61703 80 A the box containing the circuit is not in DIN standard dimensions for installation in the electrical panel, so its placement is only possible externally. In the contrary, the present invention is introduced parallel to the Residual Current Device (RCD) into the electrical panel.

The invention described in GR1007680 / EP2492946A3 attempts to solve the leakage problem of the circuit with a digital power cut sensitivity regulator. In circuit 4 of GR1007680/EP2492946A3 the load is interrupted through mosfet without taking into account the grid voltage phase, which gives as a result the generation of electrical noise input into the power supply network. In the logic circuit of the present invention, the indicator is of the LCD type as opposed to the 7 segments display shown on screen lc of circuit 3 of GR1007680/EP2492946A3, resulting in lower power consumption. Even in GR1007680/EP2492946A3, overheating problems arise as shown by circuit diagram 4, making it compulsory to use a fan to cool it, giving as a result noise in the system. In contrast, the present invention with a total of 19 resistors mounted on a board with inner copper layers to assist in heat transfer distributes the temperature better and opens the load when the voltage is zero to give zero electrical noise. The power supply of the present invention is via an integrated circuit which adapts the voltage of the respective network (230V or 110V) to a low voltage (5V) for its operation and does not require, as shown in circuit 1 in GR1007680/EP2492946A3, a radical change in the circuit Power supply. The present invention has a better performance than GR1007680/EP2492946A3 since it does not add capacitive load to the grid by changing the power factor and can operate at a greater voltage range of 90V-240V (Universal input).

KR 2003 0065195 A presents a device that informs about the presence of circuit leakage. KR 2003 0065195 A, indicates the leakage current of the electrical grid that installed. The leakage current measured by the ZCT is compared to the current initially set by the user to act on buzzer sound and not on the Residual Current Device (RCD).

Briefly, the present method and device which applies it are implemented and operate as follows:

Since there may be a leak in the electrical installation due to the leakage already existing in the technical relay not exceeding 30 mA, the present invention regulates the level of leakage so as to interrupt the electrical current at a lower leakage rate, by creating artificial leakage in the circuit that is connected. In short, the assembly and the method applied are as follows:

The device applying the inventive method during its initial installation is connected in parallel to the Residual Current Device (RCD) in the circuit. As soon as the device is connected, through the resistors it uses it generates to the circuit, with step of 1 mA each time, artificial leakage of as many mA as needed, until the amount of the leakage detected in the circuit, added to the amount of the artificial leak generated by the invention, becomes <= 30mA and as a result the Residual Current Device (RCD) interrupts the power to the installation. Thereafter the artificial leak is reduced by 2 mA so that the leakage amount is less than 30 mA and the system can re-operated again. The liquid crystal display or LED technology on the device indicates the amount of artificial leakage, reduced by 2 mA. To measure the level of the existing leakage in the circuit, it is subtracted from the 30 mA operating condition of the residual current device (RCD) the indication on the display, increased by 2 mA, i.e. [30 mA - (artificial leak + 2)]. By using the keys or via remote control or over a wireless network, are subtracted from the circuit as many mA of artificial leakage generated by the invention, as needed to ensure the residual current device (RCD) sensitivity is set at <10 mA and to interrupt the power of the installation, satisfying a new defined condition (30 mA - leakage of the existing circuit - artificial leak generated by the invention <10mA), ensuring the protection of human life and keeping it in its most uninterrupted operation.

The device implementing the method consists of a liquid crystal or LED or touch screen technology display, keys or remote control or wireless receiver, 5 resistance levels and a total of 19 resistors grouped in a specific way, copper inner layers, a special integrated circuit for voltage transformation of each network (230V or 1 10V) at 5V, processor and program.

In a variation thereof, the device implementing the present method, with the addition of a removable plug, can be adapted directly to the socket or internally into a socket box or externally to a wall.

The present invention has the following advantages:

- Energy is saved because the invention detects and measures the existing leak in the installation, enabling it to restore and stop the unnecessary leakage of energy in the circuit.

- It achieves control of the reliability of the existing residual current device (RCD) because its application requires a gradual increase of the mA leakage of up to 30 mA to stimulate the residual current device (RCD), according to the law governing safe circuit operation against electric shock of the condition of internal electrical installation, therefore any failure of the Residual Current Device (RCD) is immediately perceived.

- Detects the source of leakage and its intensity as early as 1mA. - The device is installed in all electrical installations connected to any electrical Residual Current Device (RCD) and does not affect the functionality of the residual current devices (RCD), even when improved RCD in response time (ms) are mounted in the circuit.

- The 5 resistance levels and the total of 19 resistors of the device, placed on a large surface, on a board with inner layers of copper, help to keep the heat at low level. At the same time, the present invention distributes temperature in a better way, thus eliminating the use of fan, thereby rendering the device noiseless. Operation without fan eliminates the limitation of the life of the device.

- In the logic circuit of the present invention the indicator is LCD type, resulting in lower power consumption.

- Due to the supply circuit, which has the ability of lowering the voltage to 5V to operate the device no radical change of the circuit is required in case the network where it is placed has a different voltage (220V /

1 10V), providing low cost in time and materials for its production.

- Alternatively, the device can operate by adding infrared IR remote control or Wi-Fi remote control, to set the desired level of artificial leakage in the circuit through the web.

The drawings accompanying the present invention briefly illustrate the following:

Drawing 1 shows the circuit which is the power supply of the device (Figure la) connected to the voltage of the respective network (230V or 1 10V), and converts it to a low (5V) in order for the invention to work, and in detail the connectors that support and supply the rest of the device (Figure lb) and (Figure lc) Drawing 2 shows the so-called power circuit of the device, which is the circuit of the electric power consumption (Figure 2a) of the electrical power resulting from the artificial leak and in details, the connectors of transfer power and commands, to the rest of the device (Figures 2b, 2c and 2d). Drawing 3 shows the so-called logic section and contains the electronic control circuit and user interface (Figures 3b, 3c and 3d), the microcontroller (Figure 3a), the liquid crystal indicator (Figure 3e) and the connectors that transfer power and commands to the rest of the device (Figure 3f and 3g). Drawings 4 and 5 show the flow chart of the process and decision series for implementing the method being processed by the microcontroller (Figure 3 a) in Figure 3, but also for applying the method from the device.

Drawing 6 shows the components of the device of Figure 3 in a variation of the inventive concept for adjusting and interfacing with the user, by adjusting the artificial leakage through infrared remote control (Figure 6d), the so- called logical part and contains electronic system for adjusting and interfacing with the user (Figures 6b and 6d), microcontroller (Figure 6a), liquid crystal indicator (Figure 6e) and connectors that transfer power and commands to the rest of the device (Figures 6f and 6c).

It also shows an application variant of the same inventive idea by applying the method

- in a socket sensitivity regulator device, by adding a direct or indirect plug-in socket

- in a wall mounted sensitivity regulator

- in a sensitivity regulator placed in a wall box. Drawing 7 shows the components of figure 3 of the device, in 3 in a variation of the inventive concept for adjusting and interface with the user, by adjusting an artificial leakage through the internet via Wi-Fi Module (Figure 7b), the so-called logical part containing electronic control and interface circuit to the user (7d figure), microcontroller (Figure 7a), one voltage stabilizer (Figure 7g) at 3.3 V for the power feed, liquid crystal indicator (7e figure) and connectors that transfer power and commands to the rest of the device (Figure 7f and 7c).

A non-limiting application of the method and the device that implements it, is described below with reference to the accompanying drawings.

Accessories and technical characteristics of the device that applies the method. The device consists of three parts:

- The power supply circuit board ( 101 ) of the device (Drawing 1 ). - The circuit board of the power circuit (102) which is the electrical power consumption circuit resulting from the artificial leakage (Drawing 2).

- The logic module board (103) for the electronic control circuit and the user interface (Drawing 3).

Specifically:

The power supply circuit board (101) (Drawing 1, figure la) is the power supply of the device and includes in the following order :

- Connector (33) for connecting the device to the electrical grid of the installation,

- varistor (35) at the input of the power supply circuit that protects the system from over voltages of the installation circuit voltage, which can come from the electrical supply network through the connector (33), - female connector (34) serves to support the circuit board of the power circuit (102) on the power supply board (101),

- thermistor (36) that confines the high level electrical current of the tarting of the pulse generator,

- rectifier diodes (37) and (38) of the alternating current into direct current, offering a semi-rectifying of the voltage on both poles. The filtering of the voltage after the rectification is done with a filtering capacitor (39). The capacity of the capacitor (39) is such as that, it can provide the circuit, current that is required around 200mA and is resistant to high temperatures (105oC),

- coil (40) together with the capacitors (39) and (41) create a dual- function filter, on the one hand filtering and smoothing the rectified voltage and on the other hand, blocking the high currents produced by the interrupted power supply so that they do not enter in the power supply network,

- an integrated circuit (42) of the power supply (1) regulates the oscillation of the current limitation and the adjustment of the output voltage,

- one capacitor (43) serves to uncouple the supply voltage of the integrated power supply circuit (42) from its alternative current output voltage of integrated power supply circuit (42),

- resistors (44) and (45) serve as voltage divider and regulate the output voltage of the pulse generator and are 1% precision resistors, - one diode (49) together with the capacitor (47) composes the recuperative and filtration circuit of its supply voltage (42),

- one diode (46) together with coil (48) is the circuit for lowering the voltage level, and one capacitor (50) filters out the output voltage and has been calculated to provide the required output current, i.e. 200 mA of the pulse generator figure of the power supply,

- resistor (51) discharges the capacitor (50) when the power supply stops being fed by the electrical grid,

- voltage stabilizer (53) at 5 V/150 mA feeds the device. The input of the stabilizer (53) receives 12 V and gives the output a constant voltage of 5 V for about 150mA,

- one capacitor (56) serves in the decoupling of the output voltage,

- one connector (57) connects the power supply circuit board (101) (Figure 1) to the circuit board of the power circuit (102) (Figure 2), Connectors (52),(55) and (54) (Drawing 1, Figures lb, lc) serve to connect the circuit board of the supply circuit (101) to support and supply the logic module board (103) (Figure 3) and the circuit board of the power circuit (102) (Figure 2).

The circuit board of the power circuit (102) (Drawing 2) is the load for the system and operates acts as a variable ohmic load to regulate the artificial leak that it generates.

The load is set by commands from the microcontroller (1) (Figure 3 a) which connects and disconnects resistors.

The connector (26) (Figure 2b) connects the circuit board of the power circuit (102) (Drawing 2) via the connector (7) (Figure 3g) to the logic module board (103) (Drawing 3).

There are five resistance groups (20), (21), (22), (23), (24) on the circuit board of the power circuit (102) (figure 2a) with a total of 19 resistors mounted on a large surface, on a board with inner layers of copper. The resistors are rated so that the first group of resistors (20) when connected to the circuit, creates an artificial leakage of 16 mA, when the second group (21) is connected to the circuit, creates an 8 mA artificial leak, when the third group (22) is connected to the circuit, creates artificial leakage of 4 mA, when the fourth group (23) is connected to the circuit, creates 2 mA artificial leakage and when the fifth group (24) is connected to the circuit, an artificial leakage of 1 mA is generated. By combining these resistors with the microcontroller, artificial leakage can take values from 1 to 31 mA in 1 mA increments. The switches (27), (28), (29), (30), (31) opening the load on the network line, through the connectors (18) and (19) are optotriacs capable of interrupting and connecting the load that do not exceed 1A and operating voltage up to 400V.

Connectors (17) (18) and (19) (Figures 2a, 2d) are used to support the power circuit board (Drawing 2) on the power board (101) (Drawing 1) and connector (32) (Figure 2a) for connection and mounting with the logic circuit board (103) via the connector (6) (Figure 3f). Also a connector (25) (Figure 2c) is used to support the power circuit board (102) (Drawing 2) on the logic module board (103) (Drawing 3).

The power supply of the device from the network being installed is via a connector (33) of the power supply board (101) (Figure la). The input of the power supply is universal, i.e. it receives a voltage from 90V to 260V. The power supply (101) does not provide isolation from the grid and therefore no part of the device is accessible to the user except through insulating materials.

The logic module board (103), as depicted in Figure 3, is the logic circuit consisting of the system microcontroller (1) (Figure 3a) which controls all the functions. It is a CMOS type with little power consumption and the ability to store various parameters in non volatile memory. Its' operating voltage is 5V, 8Kb program memory, 368 bytes data memory and internal clock system functionality. It is a ROHS surface support material. The functions of the logical component board components (103) (Drawing 3) are controlled by the microcontroller (1) and are the following:

- the two keys (1 1) and (12) (figure 3d) that act as selector switches and which regulate the amount of artificial current leakage generated by the device in the second step of the method,

- the liquid crystal indicator (3) (figure 3e) depicting the value of the artificial leakage current created by the device during the application of the method,

- the load through the resistors (5) limiting the current of the optotriacs in the power circuit,

- the connector (6) (Figure 3f) connecting the logic section (Figure 3) to the circuit board of the power circuit (102) (Figure 2) via the connector (32) of Figure 2a.

The board (103) also has:

Resistor (2) (Figure 3 a) holds to logic 1 the reset input of the microcontroller. Connector (7) (Figure 3g) through which the programming of the microcontroller (1) (Fig. 3a) of the system is taking place by an external programmer.

Pull-up resistors (9) and (10) (figure 3d) are provided for the operation of the buttons, selector switches, (11) and (12).

Capacitor (4) (Fig. 3e) operating to disconnect the supply circuit from the logic circuit (Drawing 3).

The ON / OFF switch (8) (figure 3 c) of the device is located on its front. When in ON mode, the microcontroller (1) (figure 3a) is fed and the circuit is in full operation. When the switch (8) (figure 3c) is in OFF mode, the only circuit in operation is the power supply circuit of the appliance (Drawing 1). Two LEDs (15) and (16) (Figure 3b) for illumination of the liquid crystal display (3) (Figure 3e) (back-light).

Two resistors (13) and (14) (Figure 3b) limit the power feeding the LEDs of the liquid crystal display illumination (3) (figure 3e).

Figure 4 shows the flow diagram defining the imaging functions on the LCD screen, timer 1 interruption service, modification of the LCD display data for calculation, load input into the grid, and the load extraction function.

Figure 5 shows the flow diagram in which the internal oscillator is initialized at the frequency of 4MHz, the system variables are defined, the initial values are given, the frequency of the PWM is set at 2048Hz, the analog inputs and the analogue comparators are deactivated and the doors of microcontroller are set. Then the load is disconnected from the grid and begins to be displayed on the LCD. It starts the timer 1, reads the EEPROM value for the load and starts the timer 1 interrupt. It then inserts the program into an endless loop where the switches are initially controlled and stores the new power values in the EEPROM for the next restart in case of power failure.

All other functions are done within the interrupts. As a function of the display on the LCD screen, a table (Look up table) is used to convert the data into the parts of the LCD digits. Three functions are performed in the timer 1 overcurrent through the interruption routine. The polarity of the signals led to the LCD at 32 Hz is changed, the PWM load cycle is set and the routine is used to import or export the load. In the data modification function the imaging data are analyzed in two sections to display the units and tens on the LCD. Figure 6 shows a variation of the board (103) for regulating the current leakage via IR (infrared) remote control.

For this operation, the two keys (1 1) and (12) (figure 3d) are replaced by an infrared sensor (10) (Figure 6d) following the NEC protocol. Changes only concern the materials of logic board. Component (9) (Figure 6d) is a pull-up resistor for the infrared sensor (10) (Figure 6d) that is the infrared remote control receiver. All other components are the same as in the design of the logic board (103) (Figure 3) described above. Figure 7 shows a variation of the plate (103) for adjusting the leakage current through the internet via Wi-Fi Module. In this version the plate is handled via any device that has the ability for a Wi-Fi connection, after it is connected to the device wirelessly using a security code. The user has the ability to see and change the artificial leakage current from the appropriate menu loaded by the web server contained in the Wi-Fi module. The device through the Wi-Fi module can be wirelessly connected to the user's router. This connection enables the user to intervene in settings from anywhere with an internet connection. In this circuit there is additionally a voltage stabilizer (22) (Figure 7g) at 3.3 V for supplying the Wi-Fi module (12) (Figure 7b) and the capacitors (20), (21) and (23) (Figure 7g) needed to uncouple the stabilizer circuit. The Wi-Fi module (12) (Figure 7b) serves to wirelessly connect the device to the internet. The resistors (9) (Figure 7b) are pull-ups to hold some of the signals of the Wi-Fi module in logic T. The transistor (18) (Figure 7b) with the resistors (10), (11) and (18) (Figure 7b) are the matching circuit of microcontroller's (1) (Figure 7a) 5V signal with the signals of Wi-Fi module (12) (Figure 7b). Resistors (10) and (11) (Figure 7b) create a voltage divider from 5V to 3.3V.

Device connectivity and steps to implement the method:

First of all, the device is placed on the electrical board in parallel with the Residual Current Device (RCD) in the circuit. From the exits of the existing leakage switch, phase (L) and neutral (N) are respectively placed on the connector (33) (Drawing 1) (figure la) at the input of the device. Then, from the output of the device, the neutral (N) is connected to the neutral (N) of the Residual Current Device (RCD) input.

With the connection of the device to the installation current, the power supply (Fig. 1) (101) starts and via the connectors (52), (54) and (57) feed off the power circuit board (102) and the logic module board (103) and activate the microcontroller (1) (figure 3a) who controls all the functions.

Step 1 : The device starts to operate via the microcontroller, following the logic diagram (figure 4), which defines in sequence: the initialization function, the display function on the LCD (Figure 3e), the service of the interrupt by the timer 1, the data-modifying function for the LCD display (3) (Figure 3e), the function for calculating and introducing the load on the network and the load extraction function.

Step 2: By pressing the ON / OFF button the device starts to operate and starts the main routine in the microcontroller (1) (figure 3a) of the logic module board (103) shown in the logic diagram (figure 5) and initially the initialization function is called whereas:

- The internal oscillator is initialized at the 4MHz frequency.

- The system variables are defined and the initial values are given.

- The frequency of the PWM is set at 2048Hz.

- Analog inputs and analog comparators are disabled.

- The microcontroller's doors are defined.

- The load is disconnected from the grid.

- Two dashes are displayed on the LCD (3) (figure 3e) in the middle of the LCD indicator (3) (figure 3e).

- Timerl starts.

- Reads from the EEPROM (1) (figure 3a) value of the load and if this is greater than 2 and less than 31 it then decreases the value by 2.

- Timerl interrupt starts.

Step 3: A delay of 98 msec to 102 msec takes place, with an optimal of 100 msec

Step 4: the program enters into an endless loop where the switches are initially controlled.

The process of the previous four steps is performed whenever the device is either fed for the first time or fed after a circuit break.

Step 5: By pressing the artificial leakage increase switch (1 1) (Figure 3d) or via remote control (10) (Figure 6d) or via wireless network (22) (Figure 7g), the invention adds to the circuit, with step of 1 mA each time, artificial leakage of as many mA as needed, until the amount of the leakage detected in the circuit, added to the amount of the artificial leak generated by the invention, becomes <=30mA and as a result the Residual Current Device (RCD) stops the current in the installation.

If the artificial leak caused by the invention reaches 30 mA and the Residual Current Device (RCD) is not energized to interrupt the current in the circuit, the malfunction of the existing the Residual Current Device (RCD) is indicated. In this way the invention also controls the good functioning of the Residual Current Device (RCD) present in the circuit.

By pushing the artificial leakage reduction switch (12) (figure 3d) or via remote control (10) (figure 6d) or via wireless network (22) (figure 7g), the artificial leakage value is reduced by one at a time only, if the previous value is greater than 0, creating artificial leakage in the circuit, by 1 mA less.

Step 6: The new artificial leakage values are stored in the EEPROM memory (1) (Figure 3a) for the next re-operation in the event of a power failure. As a function of the display on the LCD indicator (3) (figure 3e), a table (Look up table) is used to convert the data into the parts of its digits.

Three functions are performed in the timer 1 overcurrent through the interruption routine:

- The polarity of the signals being led to the LCD indicator (3) (figure 3e) is changed at a rate of 32 Hz.

- The PWM load cycle is set.

- The routine is used to import or export the load.

In the data modification function, the imaging data are analyzed in two sections to display the units and tens in the LCD indicator (3) (figure 3e).

Step 7: The load calculation function analyzes the desired artificial leak with a total of 19 resistors mounted on a large surface on a board with copper inner layers. The resistors are rated so that the first group of resistors (20) when connected to the circuit an artificial leakage of 16 mA is caused, when the second group (21) is connected to the circuit an 8 mA artificial leak is caused, when the third group (22) is connected to the circuit artificial leakage of 4 mA is caused when the fourth group (23) is connected to the circuit 2 mA artificial leakage is caused and when the fifth group (24) is connected an artificial leakage of 1 mA is caused. By combining these resistors by the microcontroller, artificial leakage can take values from 1 to 31 mA in 1mA increments. The switches (27), (28), (29), (30), (31) opening the load on the network line, through the connectors (18) and (19) who are optotriacs capable of interrupting and connecting the load that do not exceed 1 A and operating voltage up to 400V. This routine is called through the interruption routine.

Step 8: Optotriacs are triggered and open the proper outdoors, this routine is called through the interrupt routine, called the deactivation function of the (exporting) load, disconnected, through the optotriacs, the load from the grid and this routine is called in the routine of stopping the timer 1 as analyzed in step 6.

The frequency that opens and closes the load is at 50 Hz.

Step 9: The stored leakage value in EEPROM memory of the device is reduced by 2, creating artificial leakage in the circuit, by 2mA less, to re-start the system by turning on the circuit by activating the Residual Current Device (RCD). The method could be applied in the same way with a 1mA reduction, but the reduction of 2mA leads to optimal application of the method. The liquid crystal display or LED technology (3) (figure 3e) on the device indicates the amount of artificial leakage, reduced by 2mA. From the 30mA of the operating condition governing Residual Current Device (RCD), reduce the reading on the LCD indicator (3e) (figure 3e) on the device, and 2mA in addition, i.e. [30mA - (artificial leak + 2)], whereby the maximum level of leakage in the circuit is detected. In this way, any leakage in the circuit and proper operation of Residual Current Device (RCD) is checked at the same time.

Step 10: With the keys (12) (figure 3d) or via remote control (10) (Figure 6d) or via wireless network (22) (Figure 7g), the invention creates a value of artificial leakage that much as to ensure that the Residual Current Device (RCD) interrupts the power of the installation, when satisfies the condition (30mA - leakage of the existing circuit - artificial leak generated by the invention <10mA), maintaining it in its uninterrupted operation and thus ensuring protection of human life.

In application variants of the same inventive concept, the method can be applied in the same way by a socket sensitivity regulator which is placed directly in any socket outlet of the installation or internally in a socket box or externally on a wall also with the addition of a removable suction plug.

The device that implements the method is installed in all electrical installations connected to any Residual Current Device (RCD) and does not affect the functionality of the Residual Current Device (RCD), even if an improved Residual Current Device (RCD) to the response time (ms) are used.

The method can be applied in exactly the same way combined with extensions of other applications, such as, for example, temperature control, safety light, Wi-Fi signal transponder, room thermostat, table lamp, smoke detector, motion detection.