CZ26789U1 - System of delayed indication of attack to electric supply meter - Google Patents

Description

Technical field

The technical solution relates to a set of delayed indication of an electric meter attack, providing increased protection for both meter components and data recorded by it.

State of the art

Nowadays, more and more sophisticated methods of unauthorized attack of electricity meters are being detected by the electricity supplier, the most important of which is the opened cover and interventions in the electricity meter underneath in order to obtain unauthorized, so-called "black", ie unregistered electricity consumption. Many offenders make such interventions very expert, as they can so camouflage them that they are then very difficult to discern or indistinguishable at all. Such cases include, in particular, skillfully falsified seals.

Various methods of indicating the attack of the meter are known. One of them is to turn on certain symbols on the meter display element - LCD display. For example, by illuminating the r symbol, a magnetic field attack is indicated, the A symbol is lit to open the meter terminal cover and the V symbol of the meter section is opened. If an authorized person opens the meter and performs interventions on it, the relevant symbols will light up, but such a person is equipped with customer software, in addition, for example, a password that can be used to delete the indication.

However, the immediately displayed indication alerts an unauthorized person that his intervention is being recorded. It can then try to conceal the intervention appropriately, which may not be in the interest of the electricity supplier.

The essence of the technical solution

The described disadvantage is significantly reduced by the set-up of the delayed indication of the attack of the meter according to this technical solution. This comprises at least one, preferably a hidden sensor, indicating its "on / off" state when the meter is attacked by the magnetic field and / or when the meter terminal cover is opened and / or the meter section is opened, and connected to an electronic recorder and indicating element wherein a delay timer is provided in the connection between the sensor and the display element, either hardware or software. The delay value, ie, the time length of the interval between entering the pulse from the sensor into the delay and the pulse output from the delay to the indicating element is preset. The recorder is indelible and its data is only available through customer software. The indicating element is acoustic or optical, eg, an LED or LCD display, including, but not limited to, symbols for indicating magnetic field attack, opening the meter terminal cover, and opening the meter section of the meter. The indication is canceled only by company software.

The advantage of the delayed indication of the meter's electrical attack according to this technical solution is the fact that the perpetrator of unauthorized interference with the electricity meter does not have any information during the course of his activity and after that time that his intervention has been registered and therefore does not appear to camouflage his intervention. The delayed indication time is arbitrarily adjustable, however, the optimum time is 72 hours, because it is impossible to exclude the possibility that the offender's interest in the meter's state has already passed. At the same time, the meter performs its function of detection of intrusion during the unauthorized intervention as well as after it, while maintaining its measuring function, ie displaying the measured values.

List of drawings in the drawing

FIG. 1 shows a block diagram of a delayed indication assembly and FIG. 2 shows a possible arrangement of the LCD display elements.

-1 CZ 26789 Ul

Examples of technical solutions

A possible embodiment of the delayed indication meter of the meter includes two hidden sensors 1, imparting pulses of both their activation and deactivation. One of the sensors 1 detects the opening of the meter cover, the other detects the opening of the meter and also the removal of the print panel. The sensors I are connected to the electronic answering machine 2 and via the delayer 4 to the indicating element 3, which is an LCD display, which, among other information, includes the symbol r for indicating the meter reading by the magnetic field, the symbol A opening the meter terminal cover and the symbol V opening the meter measuring part cover . The delayer 4 can be implemented either hardware or software. The delay value, ie, the time interval between the pulse input of the sensor to the delayer and the pulse output from the delayer to the display element, is predetermined, typically is preferably set to 72 hours. The recorder 2 is indelible, with a timestamp recording the opening of some of the sensors I of the protected part of the meter, including the duration and its data is only available with customer software, which is also password protected. The meter's attack is indicated by the flashing of all currently displayed segments of the display element 3 - LCD display after the elapsed time of the set delay, and also by the flashing of the meter backlight, and this indication can only be canceled by the company software.

Importantly, the delayed indication of an electrometer's attack does not in any way interfere with the measurement activity of the meter, both during the time when one of the meter's parts is open and for the indication of attack.

The described technical solution significantly reduces the consequences of an undesirable attack on the meter.

Claims (9)

PROTECTION REQUIREMENTS A delayed, metering function retaining, visible and / or audible meter indication, comprising an electronic recorder (2) and an indicator element (3) for indicating pulse input from a sensor (1) connected to at least one preferably hidden sensor (1) indicating its "on / off" status when the electricity meter is attacked by a magnetic field and / or when the meter terminal box cover is opened and closed and / or when the meter meter cover is opened, characterized in that ) and the indicator element (3) is connected to a delayer (4). The meter of the delayed indication of electrometer attack according to claim 1, characterized in that the delayer (4) is implemented in hardware. A delayed indication of the electrometer attack according to claim 1, characterized in that the delayer (4) is implemented in software. The meter of delayed meter indication according to claims 1 and 2 or 3, characterized in that the time interval between the pulse input from the sensor (1) to the delayer (4) and the pulse output from the delayer (4) to the display element (3) it is pre-adjustable, preferably for 72 hours. The meter of a delayed meter indication according to claim 1, characterized in that the logger (2) is indelible and its data is accessible only by the customer software. 6. The meter of the delayed indication of the electrometer attack according to claim 1, characterized in that the indicator element (3) is audible. -2GB 26789 U1 The meter of the delayed indication of electrometer attack according to claim 1, characterized in that the indicating element (3) is an optical, preferably an LCD display or an LED. The meter of a delayed indication of electrometer attack according to claim 7, characterized in that the indicating element (3) comprises a symbol (r) for indicating the magnetic field attack, 5 a symbol (A) to indicate the opening of the meter terminal box cover and a symbol (V) to indicate the opening of the meter measuring housing cover. 9. The meter of a delayed meter indication according to claim 6 or 7, characterized in that the meter indication can only be erased by means of company software. 1 drawing