RU2327173C2 - Electric power consumption control device - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention may be used in individual and collective control systems. The device, as per invention, incorporates a counter, load cutoff circuit-breaker incorporating a cutoff coil, two identical current transformers wire-interconnected and arranged on opposite ends of the supply cable, all mounted inside a sealed power control box. The said transformers and cutoff coil are connected the power consumption control circuit so that with the misbalance originating in the transformers secondary, due to unauthorised connection of loads, the cutoff coil disconnects the user circuit. The first current transformer is connected to the phase of the power supplier circuit in the area of electric power transmission support, while the second current transformer, along with the load circuit-breaker and the counter, is mounted in the said sealed power consumption control box. The current transformers are connected by a small-section flexible insulated wires within the visibility range of controlling subjects.

EFFECT: possibility of disconnecting the user circuit in unauthorized power consumption.

1 dwg

Description

The invention relates to the field of electric power, in particular to means of control and metering of energy consumption, and can be applied in collective and individual systems of metering and control.

A device for metering electricity consumption is known, containing a current-limiting resistance (fuse) mounted on an overhead line support (see the book by P.A. Umov. Maintenance of city electric networks. M .: Higher School, 1984. P.71-75).

The presence of current-limiting resistance does not allow the excess of the use of installed capacity, and the calculation for electricity is made according to the averaged data of the electricity supplying organization.

The known device does not allow metering of the electric power consumption of each subscriber individually, and the current-limiting resistance installed on the overhead line support complicates its maintenance.

The closest set of essential features to the claimed (prototype) is a device for metering electricity consumption, disclosed in the RF application for invention RU 2003138033 (option 1), on the basis of which the RF patent RU 2253121 was issued, published May 27, 2005. The specified device for metering energy consumption contains a counter installed in a sealed electricity metering panel, a load disconnecting machine equipped with a disconnecting coil, two identical current transformers interconnected by wires installed at different ends of the input cable supplying the meter, and these current transformers and a disconnecting coil are included in a diagram of a device for accounting for energy consumption so that when a load arises due to the connection without taking into account the electricity, On the secondary windings of current transformers, a trip coil opens the consumer circuit.

The disadvantage of this device is that unauthorized use of electricity is possible when connected to the input cable in hidden places that are not visible to the controlling entities (in the wall, pipe, floor of the ceiling).

The problem to which the present invention is directed, is to provide the possibility of a guaranteed disconnection of the consumer network in case of unauthorized consumption of electricity in hidden places.

The problem is solved in that in the known device for metering energy consumption, comprising a counter installed in a sealed electricity metering panel, a load disconnecting machine equipped with a disconnecting coil, two identical current transformers interconnected by wires installed at different ends of the input cable supplying the meter, and these current transformers and a trip coil are included in the circuit of the device for metering power consumption so that when narrow without taking into account the unbalance current electric energy on the secondary windings of current transformers, a trip coil opens the consumer circuit, according to the proposed invention, the first current transformer is installed in the phase of the power supply network in the area of the overhead line support or pipe pipe, and the second current transformer, together with the load disconnect and the counter, is installed in sealed electricity metering board, and flexible insulated thin-wire wires were selected as connecting wires for current transformers views located in the zone of visibility of controlling entities.

An alternative way to obtain a technical result is to connect the beginning of the secondary winding of the first current transformer with the beginning of the secondary winding of the second current transformer, and the ends of the secondary windings of the first and second current transformers with a load disconnecting coil.

The connecting wires between the first and second current transformers and the disconnecting coil of the load switch are flexible, and in length with a margin with the possibility of inspection by moving by the value of the thickness of the hidden cavity.

If there are several separate electricity consumers in one building, the number of additional current transformers can be two, three, or more in an amount equal to the number of consumers. At the same time, when an unauthorized connection of one of the consumers occurs, only this consumer is disconnected.

The installation of the first current transformer at the beginning of the input electrical line (on a sealed switchboard, on an electrical support at a height, etc.) makes it impossible for an unauthorized connection to the input line to the first current transformer. The second current transformer mounted at the end of the input electrical line is located in the sealed unit for determining and indicating power consumption and therefore unauthorized connection without triggering the device to disconnect the consumer is also impossible.

The signs of the connection of the beginning of the secondary winding of the first current transformer with the beginning of the secondary winding of the second current transformer, and the ends of the secondary windings of the first and second current transformers with a load switch trip coil, are additional signs that contribute to the alternative to achieve the positive results provided by the technical task.

The signs of the execution of the connecting wires between the first and second current transformers and the circuit breaker of the load switch are flexible, and along the length with a margin with the possibility of inspection by moving by the thickness of the hidden cavity - these are additional signs that reveal the specific implementation of the main features and contribute to the achievement of the technical problem posed by the invention .

So, the connecting wires of the secondary winding of the first transformer passing through hidden cavities (pipes, walls of the building, etc.) are made in length with a margin so that, for example, the controller can periodically inspect this wire by stretching it on one or another side of the hidden cavity and see if there was an unauthorized connection.

The drawing schematically shows the proposed device.

A device for accounting for energy consumption consists of an input electrical line 1, at the beginning of which a first current transformer 3 is connected to the phase wire 2, with primary 4 and secondary 5 windings. At the end of the input electric line directly approaching the consumer through the sealed unit 6 for determining and indicating power consumption, a second current transformer 7 with primary 8 and secondary 9 windings is connected on the phase wire. The sealed power determination and indication unit 6 comprises a counter 10 mounted on a phase wire a second current transformer 7 and a trip coil 11 (a highly sensitive current relay that responds to the appearance of a current circuit) connected to a load switch 12. A connecting wire 13 connecting the ends of the secondary windings of the first current transformer 3 with a unit 6 for determining and indicating power consumption, is flexible and in length with a margin, forming on both sides of the hidden cavity, walls 14, etc., loops 15, while ina connecting wire 13 allows prodernut (to stretch the wire from one side wall 14 to the other) and inspect it for damage. Both current transformers 3 and 7 have the same parameters, while the first current transformer 3 is installed on the phase wire 2 of the input electric line of the power supply organization. For clarity, on the left side of the proposed scheme, an unauthorized connection block 16 is shown.

The proposed device operates as follows.

Current transformers 3 and 7 are connected to phase wire 2 of electric line 1. When turning on and supplying electricity to the consumer, when there is no unauthorized connection, the total current (unbalance current) of the secondary windings 5 and 9 of current transformers 3 and 7 will be zero, i.e. There is no unauthorized connection.

In the case of unauthorized connection of the unit 16, an unbalance current appears, which leads to the trip coil 11 (sensitive current relay) tripping and the consumer circuit opening through the load switch 12. Further power to the consumer is carried out by the inspector. Thus, the proposed device determines the presence of deviations from the equality of the primary currents in the windings of current transformers 3 and 7. In the operating and emergency modes, the secondary windings 5 and 9 and the connecting flexible wires connecting them 13 do not have an electric potential and are safe. Connecting flexible wires 13 connecting the windings of current transformers 3 and 7 are in the field of visibility and simplify the work of inspection.

Currently, the author has made several prototypes of the proposed device, tests of which have shown good results. Design documentation is being developed and work is being carried out to organize the production of the proposed devices.

Claims (1)

A device for metering electric power consumption, comprising a counter installed in a sealed electric metering panel, a load disconnecting machine equipped with a disconnecting coil, two identical current transformers interconnected by wires installed at different ends of the input cable supplying the meter, said current transformers and a disconnecting coil a diagram of a device for accounting for energy consumption so that when a load arises due to the connection without taking into account the electricity, an unbalance current in toric windings of current transformers, a trip coil opens the consumer circuit, characterized in that the first current transformer is installed in the phase of the power supply organization network in the area of the overhead line support or pipe stand, and the second current transformer, together with the load disconnect and meter, is installed in a sealed electricity metering panel, and thin insulated flexible insulated wires located in the zone of visibility of controlling subjects were selected as connecting wires for current transformers.