An electrical engineer will give you a detailed explanation of the energy meter
The electric energy meter uses integrated circuits internally to calculate the sampled current and voltage signals, and analyzes and processes the signals to obtain the usage value of electricity. At the same time, real-time electric energy parameters such as current, voltage, power, etc. can be obtained.
Classification of electric energy meters: According to different measurement properties, they are divided into DC electric energy meters and AC electric energy meters. DC energy meters are generally used in photovoltaic power generation and other occasions to measure DC electrical energy. AC energy meters are widely used in every household, and the electricity used in daily life is measured using AC energy meters.
According to different purposes, it can be divided into single-phase two wire, single-phase three wire, two-phase three wire, three-phase four wire, three-phase three wire, etc; According to the different wiring, it can be divided into direct type and mutual inductance type; According to different installation types, it can be divided into guide rail type, suspended type, circular surface, and panel surface; According to the different structures, it can be divided into integral type electric energy meters and split type electric energy meters; According to different payment methods, it can be divided into prepaid and postpaid.
The general composition of an energy meter includes power supply, signal sampling, energy metering, data processing, data storage, display, communication, and so on. Comparing an electric energy meter to a person's words!
The power source is the blood in the human body, which can provide the electrical resources for the entire energy meter to operate. Signal sampling devices are equivalent to various organs of the human body, which convert the collected high voltage and high current into low voltage signals and input them to the energy metering unit, providing sampling signals for the metering unit. The data processing unit and storage are equivalent to the human brain, processing the operation of the entire energy meter system and storing various data. The display unit can be compared to the face of the human body, and from the display, the usage of electricity in the energy meter, instantaneous measurement parameters, and so on can be obtained; The communication unit can be compared to the language function of a person, and the data acquisition device can obtain data through the communication unit.
