LT6146B - Protection module for preventing unauthorized use of electric energy - Google Patents

Abstract

The invention relates to the field of electrotechnics and can be used in electric energy consumption metering systems. Particularly it is used for preventing unauthorized use of electric power.The protection module for preventing unauthorized use of electric power consists of an automatic circuit breaker, a current sensor, a control block, an actuation mechanism, two control circuit connectors, whereas one of said two connectors links the current sensor with the control block, and the other one of said two connectors links the control block with the actuation mechanism, and a mechanical connector, linking the actuation mechanism and the automatic circuit breaker. First ends of the primary windings in the supply power grid are connected to the output terminals of the automatic circuit breaker, and the second terminals are connected to the electricity metering device. The module is arranged to be integrated into an electricity meter or can be used as a self-contained device in electric power supply system.

Description

Technical field

The invention relates to the field of electrical engineering and can be applied in the system of commercial electricity accounting for protection against unauthorized consumption of electricity and deviations of the rated parameters of electricity supply.

State of the art

It is known that in a commercial electricity metering system consisting of an electricity meter and an automatic switch, most consumers have installed inductive electricity meters which account for the electricity consumed. Only about 10 per cent of electronic electricity meters are installed. The electricity meters are connected to the electricity supplier's network through an automatic switch, which protects the power supply circuit against short-circuit currents and overloads. Besides counting the electricity consumed, the electronic meters share other functions: they read the accounting data, store them and transmit them to the electricity supply operator. In addition, the operator may remotely change the tariff system (http // www.oowi.lt. Studies "Technological and economic analysis of energy consumption meters on the market and recommendations for replacing installed appliances with advanced, technically feasible, financially feasible and proportionate Energy Savings Report, 2007)

The disadvantages of these well-known and widely used induction and electronic electricity meters are that they do not have effective protection against unauthorized use of electricity, since the sealing of their casing enclosure does not protect against fraudulent consumers from influencing the meter readings. Existing regulatory enactments prohibit the direct connection of the meter to the distribution grid in the commercial electricity metering system, therefore, at the customer's electrical input (commercial metering system), the meter is connected to the mains supply via an automatic switch.

The closest technical solution (analogue) of the present invention is an unauthorized power protection module, which consists of an automatic switch, an electrical leakage sensor, a control unit and an actuator. The power supply circuit of this protection module consists of a circuit breaker and a current leakage sensor connected sequentially to the circuit, and a control circuit and actuator having a mechanical connection to the automatic circuit breaker mechanism. The current leakage sensor is an electric current measurement transformer whose secondary winding ends are connected to a control unit that receives, processes and generates an electrical signal generated by the secondary winding of the transformer and transmits it to an actuator which executes the received command - disables the automatic switch and thus interrupts the power supply to the consumer. In the secondary winding of a current measuring transformer, an electrical signal is generated when the difference between the supply and return currents of the primary windings is not greater than 0, 3 A. The difference between the currents occurs when a user illegally consumes electricity (LT Patent Application No. 2012 046, TPK GO1R 11/00, GO1R 21/00 .G01R 22/00, Filing Date 06/14/2012).

The disadvantages of this module for protection against unrecognized electricity are as follows: the power supply to the customer is interrupted only when there is a difference in the value of the supply and return currents (current leakage) and no other functions are performed; the actuator is used to disconnect the circuit breaker from the mains supply, the installation of which on the circuit breaker body is a certified breach of the design of the circuit breaker and damage to the structure is prohibited. All of this reduces the reliability of the electricity metering system's operating mode and the power supply operator cannot remotely control or influence the system's operating mode. In addition, after a breakdown of the circuit breaker certified by the manufacturer, it is necessary to re-certify the switch.

The essence of the invention

The object of the present invention is to provide a multifunctional receiver for a commercial electricity meter, which additionally performs protective functions against the increase, voltage increase and decrease of the current supplied, and has a communication interface with the electricity supply operator for controlling and remotely operating the system. position the actuator on the DIN rail adjacent to any manufacturer's circuit breaker so that it (circuit breaker) is controlled externally. Technical result: The multifunction receiver performs more protective functions of a commercial electricity metering system; using a built-in stand, the actuator can be mounted adjacent to any manufacturer's circuit breaker without affecting the certified circuit breaker design.

Implementation of the invention

The object of the present invention is realized by a commercial electricity meter appendix consisting of a circuit breaker, a current leakage sensor supply and a consumer power grid for measuring the difference in current values, for measuring the current consumption of an electric current sensor, for measuring the supply voltage of a voltage sensor, a processor with software, signal input and output devices interconnected with other processor devices, remotely transmitting data to and from a control interface module, receiving control unit executing commands, and generating a signal for command execution, from the control unit to the executing command and attach the actuator of the stand to the DIN rail adjacent to the side of the circuit breaker with the disconnector socket. The current leakage sensor is a sensitive current measuring transformer constructed and configured by the inventor of the present invention and consisting of two equal windings, primary windings, a magnetic wire and one secondary winding. The voltage sensor is connected in parallel to the wires of the electrical supply circuit before the electrical current sensor. The power supply circuit diagram of the multifunction receiver consists of a sequential connection of a circuit breaker, a current sensor, a leakage current sensor (current measuring transformer primary windings), and a control circuit diagram consisting of a processor connected to the outputs of the supply voltage, consumption current and current leakage sensors. , a communication interface module and a control unit coupled to an actuator mounted adjacent to the circuit breaker. In addition, an electrical leakage sensor is also connected to the control unit.

The electrical signals generated at the output of the applied voltage, current and current leakage sensors are transmitted to a processor which receives them, converts them to digital signals, processes them and deviates from the measured parameters, generates a control execution signal to disable the circuit breaker. the communication interface module and to the control unit, which executes the received command by an actuator, by disconnecting the circuit breaker in the circuit breaker socket by pushing the rod, thereby interrupting the power supply to the user. Leakage current occurs when a user starts using electricity that is not counted on the electricity meter, malfunctioning electrical equipment, wiring insulation breaks, and so on. Current leakage protection shall be applied at a current not exceeding 0,3 A. The supply voltage sensor generates an electrical output signal when it reaches a set maximum or minimum supply voltage. The current consumption sensor generates an electrical output signal when the current increases to the set maximum value. The communication interface module remotely transmits information about controlled parameter deviations to the power supply operator and receives control signals from it - commands to limit power consumption. The circuit breaker is controlled externally by an actuator, which is mounted on a DIN rail adjacent to the side of the circuit breaker socket with a tripod. The design of this stand allows you to adjust the mounting position of the actuator in various directions: vertical, horizontal and circular. When the actuator is actuated by the rod, which is inserted into the tripping socket in the circuit breaker, the rod pushes the trigger and returns to its initial position when it is released. In addition, when the power to the multifunction receiver is interrupted, the protection against unauthorized use of the power is triggered by an electrical signal at the output of the leakage sensor directly to the control unit, which disengages the circuit breaker by actuator.

Disclosure of Invention

Diagrams and drawings of the proposed commercial electricity meter multifunctional attachment are presented in the form of a block diagram of the multifunctional attachment (Fig. 1), drawings for a rack actuator (Fig. 2, Fig. 3), an automatic switch, a rack and actuator DIN rail, overall view (Fig. 4).

Multifunctional appendix 1 for commercial electricity meter, consisting of circuit breaker 2, supply voltage sensor 3. power consumption sensor 4, current leakage sensor 5, processor 6, communication interface module 7, control unit 8, actuator 9, stand 10 , terminal 11 of the appendix, control circuit connections: connector of connector 12 connecting supply voltage sensor 3 to processor 6, connector 13 connecting power supply sensor 4 to processor 6, connector 14 connecting electrical leakage sensor 5 to control unit 8 15, connecting the current leakage sensor 5 to the processor 6, the connectors 16 and 17 connecting the two-way processor 6 to the communication interface module 7, the connector 18 connecting the processor 6 to the control unit 8, the connector 19 connecting the control unit 8 to the actuator 9. Stand 10 consists of an "L" shaped plate 20 with two vertical notches 21 and inserts: a circular plate 22 with a hole 23 in the center 23 and a hole 24, a strip 25 with a notch 26 and a hole 27 and fastening screws 28. The actuator 9 is mounted to the plate 22 using inserts 22. 25 28: Attached to a plate 22 connected to a strip 25 which is inserted into a notch 21 of the stand. With this composition, the actuator can be adjusted in all directions: vertical (strip 25 slides up and down in notches 21), horizontal (plate 22 slides in notch 26 in both directions), rotated in a circle (plate 22 rotates on strip 25). The stand 10 with the actuator 9 is mounted on a DIN rail 29 adjacent to the automatic switch 2, the actuator is positioned so that its sliding actuator rod 30 is inserted into the unlocking socket of the automatic switch 2 and secured by screws 28.

The circuit breaker 2 can be of various manufacturers, certified and equipped with a tripping socket. The input of the multifunctional attachment 1 is the terminals of the circuit breaker 2 to which the wires 31 (F), (O) of the power supply network are connected. Commercial electricity meter 32 is connected to output 11 of multifunctional appendix 1 and connected to the customer's power grid 33.

The current and current leakage sensors 4, 5 are inductive, that is, transformers for measuring the current. The current leakage transformer consists of two primary windings 34, 35 of equal number, one of which is a phase 34 and the other of 35, a magnetic wire and one secondary winding which generates an alternating current signal when the primary windings 34, 35 occur through them. the difference between the forward and reverse currents. The transformer for measuring the current consumed consists of one primary winding 36 and one secondary winding, which generates an electrical signal of the measured electric strength. The primary windings 34, 35, 36 of these current measuring transformers are connected in the power supply circuit as follows: one end of the windings 34, 35 is connected to the terminals 11 of the multifunctional appendix 1, the other end of the winding 34 is connected to one end of the winding 36. Other windings 35. The 36 ends are connected to the 2 terminals of the circuit breaker.

Operation of the Commercial Electricity Meter Multifunctional Appendix 1

By connecting the phase (F) and zero (O) wires of the power supply network 31 to the input terminals of the multi-function attachment 1 automatic switch 2, and to the output 11 the electricity metering device 32 to which the consumer power network 33 is connected and the automatic switch 2 and when the consumer starts to use electricity, the electric supply circuit supplies the electricity to the electricity meter through the primary winding 36 of the current sensor 4 and the phase primary winding 34 of the current leakage sensor 5. and through the primary winding 35 of the multifunction transmitter current leakage sensor 5 and the circuit breaker 2. When no unaccounted electricity is consumed, the meter 32 records the electricity consumed because the values of the supplied current and the return current are identical. and no electrical signal is generated in the secondary winding of sensor 5 (output of sensor 5). When a user starts to use unmetered electricity in the metering device 32, different currents of different currents start to flow through the primary windings 34 of the current sensor 5 and, when the difference in current intensity approaches 0.3 A, an electrical current is induced in the secondary winding of the sensor 5. force - the output electrical signal of the sensor 5 is proportional to the value of the difference in current and transmitted to the processor 6 by means of a connector 15. The supply voltage sensor 3 and the current sensor 4 output the measured parameters electrical outputs via terminals 12, 13 to processor 6. the electrical signals received by the sensors 2, 4, 5 are converted into digital signals, processed and, at the deviations of the measured parameters (maximum and minimum supply voltage values, maximum power consumption values, the output of the processed signals is transmitted through the connector 16 to the communication interface module 7, from which the data is transmitted to the power supply operator, and the control switch "off switch" 2 formed at the same time in the processor 6 is transmitted to the control unit 8: the execution command formed in this block activates via actuator 18 the actuator 9, which by sliding rod 30 disables the automatic switch 2 and returns to its initial position, thereby interrupting the power supply to the user. In the multifunctional appendix 1, in the event of a power failure, the current leakage sensor 5 transmits the generated electrical signal via a connector 15 directly to the control unit 8, which disengages the circuit breaker 2 by the actuator 9. but can delegate control execution command to reduce or increase power consumption.

The proposed composition of the multifunctional appendix 1 and the stand 10 design are more advanced than the closest technical solution, as the appendix performs three additional security functions of the commercial electricity metering system (protects against peak current and voltage and low voltage) - a processor 6 and a communication interface module 7, which allows controlled parameter data to be collected, processed, stored, remotely transmitted and remotely received by control commands, and the provided design of stand 10 allows for an unobtrusive implementation of the circuit breaker certified design the mechanism 9 externally controls the automatic switch 2 of any manufacturer having a socket outlet. This is very relevant for upgrading the existing consumer electricity metering system with smart devices, as the current system makes multifunctional appendix 1 easy to implement technically and cost-effectively.

Claims (4)

DEFINITION OF INVENTION 1. Commercial Multifunction Attachment, consisting of a circuit breaker, a power leakage sensor, a control unit and an actuator, characterized in that the multifunction attachment of the commercial electric energy meter consists of an automatic switch, a supply voltage sensor, a power consumption sensor, power leakage sensor, processor, communication interface module, control unit, actuator, rack and control circuit connections connecting supply voltage, power consumption and current leakage sensors, communication interface module and processor control unit, and a connector connecting the control unit to the actuator. A multifunctional attachment for a commercial electricity meter according to claim 1, characterized in that the stand comprises an "L" shaped stand and inserts: strips, circular plates and screws. 3. A multifunctional appendix to a commercial electricity meter according to claims 1 and 2, characterized in that there are two vertical, narrow slots at the edges of the vertical wall of the stand, which are provided with a vertically sliding strip capable of sliding horizontally on both sides and rotate the circular plate with an actuator attached thereto, the position of which in the stand can be adjusted by means of a strip and a circular plate, and fixed in position by screws. A multifunctional appendix to a commercial electricity meter according to claim 1, characterized in that the processor comprises an input device which converts received electrical signals to digital, transmits the digital signals to a processing unit having a program, transmits the received data to the communication interface module via the output device, and transmits the formed control execution commands to the control unit.