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With the increasing demand for electricity from power users, some power users adopt various means of electricity tamper in order to obtain electricity for free and to achieve the purpose of paying less or not paying electricity bills. tamper of electricity not only causes great direct economic losses to power supply institutions, but also has a great impact on the quality of the power grid, and brings security risks to the electricity users. The phenomenon of electricity tamper is especially serious in Southeast Asia, Africa, South America and other regions, and the energy meters in these regions are explicitly required to have the function of electricity tamper prevention.
Today I would like to introduce to you the way to prevent electricity tamper power meter and the clarification of professional terms.
1、Absolute value measurement: to prevent the live line, neutral line connection reversal; live and neutral line connection reversal according to the normal positive measurement and calculation
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2、Open cover detection: Some electricity tamper needs to change the wiring or meter internal devices to achieve, open cover detection function can be issued when the electricity thief open the surface cover, tail cover alarm and saved to the memory chip in the form of event records.
3、Magnetic field detection: through the magnet near the meter affects the measurement accuracy of the meter, according to the standard requirements in the external magnetic field ≤ 0.5mT is the meter can be measured normally; magnetic field detection function can detect when the external magnetic field near the meter issued an alarm and saved to the memory chip in the form of event records.
4、Double-circuit (Neutral line) metering: ordinary meters only measure the live line circuit, while double-circuit Anti-tamper meters also measure the Neutral line, and when the Neutral line current is detected to be greater than the live line current, the meter uses the Neutral line current for power calculation. When the Neutral line current is detected to be greater than the live line current, the meter uses the Neutral line current to calculate the power.
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5、Drop Neutral line metering: general electricity meter after losing the Neutral line, it will lose the power to maintain the work, will stop working to lose the ability to measure electricity. In South Asia, South America this kind of tamper of electricity by destroying the Neutral line input of the meter is more common, according to this pain point yongtailong design and development of the meter without Neutral line power supply can also be measured normally (load current greater than 0.5A case)
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The methods of electricity tamper are endless, but the basic principle is mainly through changing the main parameters of energy meter measurement (voltage, current, power factor), to achieve the purpose of electricity tamper. Yongtailong is a high-tech enterprise, which has been focusing on the R&D, manufacturing and sales of foreign trade energy meters since 2000, and is now exported to nearly 60 countries and regions. Having worked in the international energy meter market for more than 20 years, we have a clear understanding of the performance requirements, functional requirements and other special requirements of electricity meters in each country. Under the guidance of product leadership strategy, we play the advantage of technological innovation to gain a foothold in the global electric energy meter market.
