Integrated intelligent electricity meter with earth leakage protection function

Abstract

An integrated smart meter with leakage protection function. It consists of three parts: casing, machinery and circuit. The casing is composed of a base (1) and an upper cover (2). The mechanical part is mostly installed in the base. There are LCD screens, Buttons and indicator lights, the circuit includes a power circuit (16), a main control chip circuit (19), a communication and control circuit (17), a metering circuit (15) and a sampling circuit (18); the single-phase AC 220V input in the power circuit passes through Step down the voltage of the transformer, then rectify it into DC, and output 5V through the voltage regulator block to provide stable 5V power supply and 12V power supply for the main control chip circuit, communication and control circuit, metering circuit and sampling circuit; the AC in the power circuit The 12V output terminal is connected to the optocoupler output terminal of the sampling circuit. This meter can perform automatic load control and leakage protection for power users, saving time, labor, safety and efficiency.

Description

technical field [0001] The invention relates to an integrated intelligent electric meter with leakage protection function used in a low-voltage power distribution and metering box. Background technique [0002] The watt-hour meters used in low-voltage power distribution cabinets and metering boxes can only measure the actual output power usage, so as to complete the task of charging electricity usage. Once this kind of watt-hour meter cannot cut off the user's electricity in time when the user owes the fee, it can only be used Manual on-site switching can control the continued arrears of electricity, which has caused some problems such as untimely charging and arrears of electricity. In the event of overload, short circuit and other faults, the power supply circuit cannot be cut off in time, and accidents such as personal electric shock and electrical fire cannot be avoided. It can be seen that ordinary electric meters need to be used in conjunction with other line protecti...

AI Technical Summary

Problems solved by technology

At present, each split type, used alone, there are serious hidden dangers to personal safety and electrical appliances, and the cost of auxiliary equipment is relatively high, and it is also limited by the actual installation space of the box, which brings a lot of inconvenience to the actual installation and commissioning process.

[0003] So far, an integrated and comprehensive smart meter that has the meter's own measurement function and can truly realize the line protection function has not yet come out. Therefore, in order to actively cooperate with the transformation of my country's new rural power grid, a new type of smart meter with leakage protection function is proposed. is imperative

Images