What Is The Principle Of Electricity Theft By Smart Meters? What Are The Two Types?

In the daily life of the public, smart energy meter plays a very important role, but it often has the reason of electricity theft. Recently, the editor often sees people asking about the anti-theft principle of 3 phase smart meter, so today the editor will explain it to you.

According to its function and principle, three phase smart meter is divided into two types. 1. When electricity is stolen, the meter will immediately cut off the power, and the power supply will be restored immediately when the theft stops; 2. When electricity is stolen, the meter will measure or measure faster.

Generally, 3 phase wifi energy meter has a controller composed of relays, transformers and electronic circuits compared to ordinary meters. The phase line and neutral line of the main circuit pass through the coil of the zero-sequence current transformer. During the normal working hours of single phase wifi energy meter, the currents on the two lines are equal and opposite, the induction signals of the transformers are offset, and the output signal is zero. When electricity theft occurs, the inlet and outlet currents are different, and the current values ​​of the two lines are different. When it exceeds a certain value, it trips and cuts off the power. Recommended reading: What protocol specifications does 3 phase smart energy meter comply with? What are the advantages?

Another method is to change the counter to a two-way relay with a reversing wheel. When someone changes the polarity of the current and voltage coils, uses a stealing device or other methods to reverse the aluminum disk of the energy meter, the counter maintains the positive count of the energy meter through the reversing mechanism, and the user cannot use the above method to make the counter count down, thereby preventing electricity theft.

As an anti-electricity theft researcher, one should have a forward-looking consciousness, be able to think about the ideas of the electricity thief, and seize the opportunity of anti-electricity theft before the electricity theft occurs, so as to effectively prevent the occurrence of electricity theft and effectively ensure social and economic benefits.