The diversity of society determines the occurrence of electric tampering. Correct judgment and treatment of electric tampering can bring real economic and social benefits to power supply companies.
With the development of social economy and the gradual increase of power users, electric tampering has been troubling power supply enterprises and affecting the completion of various assessment indicators. Electric tampering has seriously damaged the interests of electric power enterprises, disrupted the order of power supply and consumption, and affected the social stability of the country. Although the power supply enterprises have taken a variety of anti-tampering measures, the tampering still happens. And with the rapid development of science and technology, electric tampering becomes more sophisticated.
First, electricity Tampering Causes
Due to the changes in the policy, power supply enterprises have no corresponding right to punish power theft. There are many reasons for electric theft. It is summarized as follows.
1. Changing the circuit connection. Reverse connect or cascading the one phase or multi phases of the current transformer.
Modify the current coil of the short circuit metering device. If we use the wire short connection, the wire resistance is almost zero and most of the current will pass through the short wire. The current coil of the electricity meter almost has no current, which will result in the electricity meter stopping; If the current coil is connected with a resistance less than the resistance value of the current coil, the current coil is connected with the resistance to form a parallel circuit. According to the shunt principle of the parallel circuit, most of the current will pass through the parallel resistance, and only a small current will pass through the current coil, causing the electricity meter to rotate slowly in a certain proportion, so as to achieve the purpose of stealing power.
2. Disconnecting the voltage coil is to make the voltage coil devoltage so that the meter does not work. The common method is to loosen the voltage connection. This method does not need to open the meter seal. It is a relatively low-level method of stealing electricity.
3. Disconnecting neutral line. As for this method, the neutral line of the incoming line of the electricity meter must be disconnected and concealed in advance. It is similar with adjustment tampering method that it needs to connect or set up another ground line and install the switch in the house.
4. Stealing power by phase-shifting
The thefts change the normal connection of watt-hour meter, or connect to the voltage, current which has no any connection with meter coil or change the normal phase relationship between voltage and current in coil to slow down the meter or even reverse its working.
5. Electric theft by enlarging the tolerance
The electricity stealer disassembles the electricity meter privately, and change the internal structure and performance of the electricity meter by various means, thus enlarging the tolerance of the electricity meter itself. The use of electric current or mechanical force to damage the electricity meter and change the installation conditions of the electricity meter. This kind of stealing power is called tolerance enlarging method.
6. High-tech power theft
The so-called high-tech electric theft refers to the one which is different from traditional electric theft techniques. The traditional methods of stealing electricity mainly include connecting lines privately, changing the internal wiring of metering devices, forging the seal of electricity meters, damaging electricity meters, forging the nameplates of transformers etc. These methods generally do not need specific auxiliary equipment to carry out.
Second: Anti-tampering Applications
(1) Adopt advanced anti-tampering meter box. For special transformer users, installing special metering boxes and closed metering cabinets on the outgoing side of the transformer can effectively prevent general power theft. Usually, when stealing electricity, the person must touch the metering device one or two times before committing a crime. Therefore, the purpose of using a special metering box or electricity meter box is to prevent the person from touching the metering device, so as to improve the metering device’s ability to prevent electricity theft.
(2) Make use of high-tech products to improve the ability to resist electric theft. Advanced technology and equipment are the basic guarantee to carry out anti-electric theft work. The anti-electric theft capability of metering equipment often lags behind the rapid development of electric theft means, and cannot completely prevent the occurrence of electric theft. Therefore, attention should be paid to the reform work of preventing electric theft. Preventing the loopholes of electric theft from metering devices and distribution facilities, strengthening the supervision and management of household lines and electric power metering devices under electricity meters, enhancing the reliability of power supply metering facilities against theft, and curbing the occurrence of electric theft to the greatest extent are what we should do for anti-tampering. We can install load control system and get the fault alarm of devoltage and current loss from metering alarm device.
Linyang’s watt-hour meter has a powerful anti-tampering function especially in terminal/cover, magnetic interference, PN unbalance, reverse power, neutral line missing, by pass. Linyang’s smart prepaid electricity meters SM150, SM350 can effectively prevent the theft of electricity, which could be the best choice for customers in terms of selecting anti-tampering electricity meters.
Post time: Jan-19-2021