RU176977U1 - SAFETY AND OPERATION CONTROL DEVICE 220V - Google Patents

Abstract

The device is designed to control the safe connection of wires of both a three-wire and a two-wire line of a 220 V network to the contacts of an electrical outlet with a protective contact of a European type. The technical result consists in increasing the reliability of identification of faults in the installation of wires in the Euro-socket and increasing the scope of the device. In the device (Fig. 3), containing two interconnected electrical branches connected to a plug having a ground contact (4), each of the branches includes a series-connected indicator element (1) and a limiting resistor (2), and the indicators are made in the form of LEDs turned on in the opposite direction, and the third electric branch contains sequentially and consistently connected LEDs (6) and a diode (5) and is connected at one end to the midpoint of the two branches, and at the other end to the ground contact (4), and the LED (6) is one third of the first branch is turned on in the opposite direction to the first two LEDs (1), as well as a sensor transistor switch, an LED (8) and a resistor (9) are introduced, the first output of the LED (8) is connected to the first output of the sensor transistor switch, the second output of which is connected to the phase wire contact (3), the second output of the LED (8) is connected to the connection point of the first (2) and second (9) resistors, and the LED (8) is turned on in conjunction with the LED (6) of the third electrical branch. The device can be used during the commissioning of electrical installation of premises as well as in the current operation of electrical equipment. 5 ill.

Description

The alleged invention relates to the field of electrical engineering and may find application for the safe operation of office and household appliances. The proposed utility model provides control of the safe connection of wires of both a three-wire and a two-wire line of a 220 V network to the contacts of a European (German) type electrical outlet.

The well-known Euro-tester EuroTester (www.waisbord.co.il/eurotester.asp) The electrical circuit of the tester is shown in the drawing of FIG. 1. The tester has three indicator lights HL1, HL2, HL3, three resistors, three diodes and two buttons with contacts for shorting S1 and S2 to test the residual current device - RCD connected to the outlet line. The tester recognizes three standard malfunctions in the installation of wire sockets:

1. - An open of the PE protective earth wire, while three light indicators are lit

2. - Open wire of the working zero N, the HL3 indicator lights up, if the phase wire L is connected to the right contact of the socket (when they are horizontal). If the wire L is connected to the left pin of the socket, the HL1 indicator lights up.

3. - Reverse phase L wire and PE protective zero wire. At the same time, the indicators HL1, HL3 are lit

If the socket is connected to the 220 V network correctly, the indicators HL2, HL3 light up when the phase is connected to the right and HL2, HL1 when the phase is connected to the left contact of the socket.

Using the S2 button "Test N = PE" and the RCD device connected to the outlet line, a malfunction is detected - reverse of wires N and PE. However, the tester will not detect a dangerous double malfunction of the outlets if there is a break in the PE wire and the phase wire is shorted to the ground terminal of the outlet. At the same time, HL2, HL1 light up if the phase is connected to the right and indicators HL2, HL3 light up if the phase is to the left. This means that the indicators light up the same way as with a safe and efficient outlet.

The disadvantage of this tester is that it does not detect which pin of the socket the phase wire L is connected to, if there is a break in the PE wire or a two-wire 220 V line is connected to the socket.

There is a well-known socket tester CA 751 manufactured by CHAUVIN ARNOUX (www.electronshik.ru). The tester has three LED indicators, three diodes and three resistors. The electrical circuit is similar to the EuroTester tester. The CA 751 tester is different in that there are two external sockets on the front of the case for connecting voltage indicators CA 704 or CA760 for phase identification. The disadvantage of this tester is that an additional device is used to determine which contact of the outlet the phase is connected to. This slows down and complicates the process of checking 220 V sockets.

The well-known socket tester MS6860D (www.testers.ru/catalog) does not detect a double dangerous malfunction of the sockets, since it does not have a touch phase identifier.

The closest analogue (prototype) in technical essence is "Device for monitoring the presence of grounding in the socket", patent LV 143333 V, IPC H01H 9/00, G01R 27/20, published on July 20, 2011. Application P-09-212, published on 04/20/2011. The electrical circuit of the device is shown in the drawing of FIG. 2 The device consists of a plastic insulating casing with a plug built into it with a protective contact of the European type. There are three LED indicators on the front of the case. The indicator HL1 is red, HL2 and HL3 are green. The device recognizes three standard faults:

1. - Open wire PE. The indicators HL1, HL2 are on. HL3 indicator is off. In this case, the phase wire L can be connected to the right or left contact.

2. - Wire break N. HL3 indicator is on, HL1, HL2 indicators are off. In this case, the wire L can be connected to the right or left pin of the outlet.

3. - Reverse L and PE wires. The HL3 indicator lights up. Indicators HL1, HL2 do not light. When you touch your hand to a place on the device’s body, where the touch terminal E is located on the inside of the case, the HL3 indicator goes off. This device recognizes a double dangerous malfunction when the left contact of the socket and the ground contact are under the phase potential and the wire N is connected to the right contact. At the same time, the HL2, HL3 indicators are green. But when you touch your hand to the place where the touch contact E is located, the HL3 indicator goes out. With the correct connection of the wires of the outlet, the indicators HL2, HL3 also glow. But at the same time, the HL3 indicator does not go out at the touch of a hand. The disadvantage of this device is the low reliability of detecting a dangerous malfunction of the outlets, since when there is no malfunction in the outlet by touching a hand to the device’s case, nothing changes.

Before checking the outlets, it is necessary to check the control device itself (for example, by connecting outlets to the malfunction simulator).

The disadvantage of this device is that it does not detect to which pin of the outlet the phase wire L is connected in the case of a two-wire 220 V.

The purpose of the proposed utility model is to eliminate these drawbacks, namely, ensuring the reliability of the identification of malfunctions of 220 V Euro outlets and increasing the scope of the device.

This goal is achieved by the fact that in the device for monitoring the safety and operability of 220 V sockets, containing two interconnected electrical branches connected to a plug having a ground contact, each of the branches includes an indicator element and a limiting resistor connected in series, and the indicators are made in the form LEDs turned on counterclockwise, the third electrical branch contains sequentially and consistently connected LED and diode and is connected at one end to the midpoint of two x branches, and the other end to the ground contact, and the third branch LED is turned on opposite the first two LEDs, as well as the sensor transistor key, an LED and a resistor are connected in series between the first resistor of the second electric branch and the phase wire contact, the first output of the introduced LED is connected in concert with the first output of the sensor transistor switch, the second output of which is connected to the contact of the phase wire, the second output of the introduced LED is connected to the connection point of the first and of the resistors of the second electrical branch, the introduced LED being included in coordination with the LED of the third electrical branch.

The essence of the invention lies in the fact that the electrical circuit of the device is changed in terms of the connection of the sensor transistor key. An additional LED has been introduced with its own electrical connections. The proposed utility model is illustrated by the drawing in FIG. 3. The device contains two electrical branches, one ends connected to each other and the other connected to the contacts (3) of the plug. Each branch contains a series-connected LED (1) and a resistor (2). The third electrical branch contains an LED (6) and a diode (5) and is connected at one end to a ground terminal (4). There is an entered LED (8) and a sensor transistor switch (7).

The device (Fig. 3) recognizes the following faults:

1. - Open wire PE. The indicators HL1, HL2 are on. HL3 indicator is off. If the phase is connected to the right contact of the socket, then when the hand touches the touch contact, the HL4 LED lights up. If the phase is on the left contact of the socket, then the HL4 indicator does not light

2. - Reverse wires L and PE. Indicator HL3 is on, but HL1, HL2 are off. The HL4 indicator does not shine at the touch of a hand, since the source of the transistor switch is at zero potential. There is no current in the gate circuit and the transistor is closed

3. - Wire break N. The HL3 indicator is on because there is current in the circuit: contact (3) - resistors (2) and (9) -diode VD2 - LED HL3 -diode VD3 - contact PE. Indicators HL1, HL2 do not light. If the phase wire is connected to the right pin of the outlet, the HL4 indicator glows by hand.

4. - Double dangerous malfunction. In this case, the left contact of the socket and the ground contact are under phase potential and the wire N is connected to the right contact. In this case, the indicators HL3, HL2 are on, and HL1 is not on. The HL4 indicator does not glow by hand, since the N wire is connected to the right pin of the outlet.

5. - The socket under test is connected correctly if the phase L wire is connected to the right pin of the socket, wire N is connected to the left pin and the protective zero wire PE is connected to the ground terminal of the socket. In this case, the indicators HL3, HL2 are lit and HL4 is lit from the touch of a hand to the touch contact E. In the drawing of FIG. 4 shows an electrical diagram of a second embodiment of the device in which a tri-color RGB LED with a case diameter of 5 mm is used. The LED emits red, blue, green light and has four outputs.

The appearance of the prototype of the proposed device is shown in the photo of FIG. 5 The touch contact E is made in the form of a metal plate 20 × 20 mm, mounted on the inside of the device. The sensor transistor switch is made on an MOS transistor having a large input gate impedance.

The pilot operation of the proposed device in real conditions of a single-phase three-wire 220 V network confirms the ability to control the health and safety of outlets. The device detects to which pin of the socket the phase wire is connected, and in the case of a two-wire line of the 220 V network. This allows the user to connect the plugs of electrical appliances in the sockets in the right direction, so that the phase is connected to the right pin of the plug. This increases the reliability of electrical appliances and reduces their electromagnetic field of 50 Hz.

Literature

1. Device for monitoring the presence of grounding in the outlet. Patent RU 2341841 C1 IPC Н01Н 9/00

2. Patent LV 14333 V, IPC H01H 9/00, G01R 27/20 Device for monitoring the presence of grounding in the outlet. Published July 20, 2011. Application R-09-212 published on 04/20/2011

3. Afanasyev A.I. Electromagnetic background of industrial frequency 50 Hz "Safety and labor protection" 2006 Nr3

Claims (1)

A safety and operability monitoring device for 220 V sockets, containing two interconnected electrical branches connected to a plug having an earthing contact, each of which branches includes an indicator element and a limiting resistor connected in series, and the indicators are made in the form of LEDs connected in the opposite direction, the third electric the branch contains a serially and consistently connected LED and a diode and is connected at one end to the midpoint of the two branches, and at the other end to the contact the LEDs of the third branch are turned on opposite to the first two LEDs, as well as a sensor transistor switch, characterized in that the LED is inserted and a resistor connected in series between the first resistor of the second electric branch and the contact of the phase wire, the first output of the introduced LED is connected to the first output of the sensor transistor key, the second output of which is connected to the contact of the phase wire, the second output of the introduced LED is connected to the connection point of the first and second resistors of the second electric eskoy branches being introduced LED included in concert with LED third electric branch.

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