RU217288U1 - STEP VOLTAGE INDICATION DEVICE FOR ELECTRIC CURRENT - Google Patents

Abstract

The utility model relates to electrical appliances, in particular to indicators (meters) of the magnitude of direct or alternating electrical voltage. The use of this device is most effective in cases where there is a step voltage zone dangerous for humans on the ground. The device detects the presence of step voltage on the surface of the earth or its coating and informs the person by triggering an audible alarm without a power source in the electrical circuit of the device. The device for indicating the step voltage of an electric current consists of two conductive electrodes isolated from each other, located at a maximum distance from each other on the sole of a person's shoes. The electrodes are connected to an electrical circuit that generates a sound signal when a potential difference in electric current appears between the electrodes. The use of the utility model will increase the safety of conducting electrical work on the earth's surface when an electric current is shorted to the earth and a step voltage occurs.

Description

The utility model relates to electrical appliances, in particular to indicators of the magnitude of direct or alternating electrical voltage. This device is used to indicate the electrical voltage (electric potential difference) that occurs between two points on the ground at a distance equal to the length of a person's foot, when he is in the danger zone - the step voltage zone. Step voltage occurs when a single-phase earth fault occurs in networks with an isolated neutral - in electrical installations with a voltage of 6-35 kV, for example, in the case of a short circuit of one wire of an overhead power line with a voltage of 6-35 kV to the ground or a support structure.

The step voltage indicator device is designed to operate in all weather conditions and outdoor temperature from -40°C to +40°C and does not require a power source (non-volatile).

Known are voltage signaling devices with caps SNK-10 (SNK-35), manufactured by Karneol LLC (Moscow region, Dolgoprudny, PO Box 103), voltage alarms with caps "Radius" manufactured by LLC NPC Elektrobezopasnost (Kirov region). , Kirov, PO box 57), which are designed to warn a person about approaching him at a distance of less than two meters to live parts under voltage of 6-10 kV, however, they have built-in (dependent) power sources.

Known voltage detectors SNI-6-10-U2 "Crystal" manufactured by "INVAR - ELTRANS" (Moscow, Podkolokolny lane, 13/5, office 512, 615), which are designed to warn operating personnel about the presence of voltage on wires of power lines with a voltage of 6-10 kV and have built-in (dependent) power supplies.

Known voltage signaling devices are individual universal IMS manufactured by the DIELECTRIC Company (127411, Moscow, PO Box 1), which are designed to alert a person about his approach to the current-carrying parts of 6-10 kV overhead power lines that are under voltage, and have built-in (dependent) power supplies.

Known voltage alarms are individual helmets "SNIKM 6-10" manufactured by Energozashchita LLC (Republic of Armenia, Yerevan), which are designed to warn personnel working on overhead power lines with a voltage of 6-10 kV about being in a potentially dangerous zone due to for approaching live wires at a dangerous distance and have built-in (dependent) power supplies.

The above signaling devices have built-in (dependent) power sources, which reduce their reliability, since the power source may lose its operability, followed by the loss of the diagnostic function of the device.

The closest in technical essence of the known devices is the device described in utility model 123168 (application 2012116339/28 dated 23.04.2012). An automatic individual step voltage signaling device containing a measuring body, a sound signaling module, placed in a durable plastic case that protects the device elements from mechanical damage and exposure to atmospheric precipitation, two insulated stranded copper flexible wires connected to conductive electrodes mounted on the sole of each person's shoes . This signaling device for the presence of step voltage provides for the location of one conductive electrode in each of the soles of a person's shoes, the connection of the electrodes to the signaling device using conductors attached to clothing or the human body, which reduces its reliability and brings inconvenience in use. The principle of operation of the device implies the location in the zone of action of the step voltage of both legs of a person, therefore, the passage of electric current through the human body until the alarm is triggered is not excluded.

The technical task of the utility model is to develop a voltage detector that will show the presence of step voltage even when one foot is in the dangerous zone of electric current spreading over the ground. Solving the problem will ensure the safety of the enterprise personnel in this zone.

The task is achieved by the fact that in the device for indicating the step voltage of an electric current, consisting of two conductive electrodes isolated from each other, connected to an electrical circuit that generates an audible signal when a potential difference of the electric current between the electrodes appears, according to the utility model of a pair of electrodes with an electrical circuit located at the maximum distance from each other on the sole of a person's shoes.

The developed device does not require insulated wires to be attached to the human body or clothing. Secondly, to alert a person about the zone of action of step voltage, it is enough to be in the zone of action of step voltage of one leg of a person. It is possible for one person to use two devices - one device in the left shoe, the second device in the right shoe to inform the person about the presence of step voltage, regardless of whether the right or left foot of the person first enters the step voltage zone.

To explain the principle of operation of the device, consider Fig. 1. The step voltage zone 1 appears, for example, as a result of a break in the electric current conductor of a voltage level of 6 kV 6, mounted on the supports of an overhead power line 5. When one leg of a person is in the step voltage zone between electrodes 2 isolated from each other, located at a maximum distance from each other on the soles of human shoes, a potential difference of electric current is formed. This electric current potential is transmitted through the electric conductors 3 to the audio signal generator 4, where the electric current potential is converted into an audio signal. An audible signal notifies a person about being in a potentially dangerous zone - a zone of step voltage.

Claims (1)

A device for indicating the step voltage of an electric current, consisting of two conductive electrodes isolated from each other, connected to an electrical circuit that generates an audible signal when an electric current potential difference appears between the electrodes, characterized in that a pair of electrodes with an electrical circuit are located at a maximum distance from each other. friend on the sole of a person's shoes.

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