Single phase electronic watt-hour meter

Abstract

A single phase electronic watt-hour meter comprises an electronic watt-hour meter measurement unit, a voltage sampling unit, a current sampling unit, a light emitting diode (LED), a register and a power source. Signal output ends of the voltage sampling unit and the current sampling unit are connected with a signal input end of the electronic watt-hour meter measurement unit. A pulse signal output end of the electronic watt-hour meter is connected with the LED. A register driving output end of the electronic watt-hour meter is connected with the register. A measuring signal output end of the electronic watt-hour meter measurement unit passes through an isolating circuit to be connected with a test end port. The power source is connected with a power source input end of the electric watt-hour meter measurement unit. According to the technical scheme, the single phase electric watt-hour meter is reasonable in structure, high in precision, wide in load, low in power consumption, high in sensitivity, small in size, convenient to install, long in alternative cycle, stable and reliable in running, strong in anti-interference capacity and the like. The light emitting diode pulse indication is convenient to monitor, optoelectronic isolation pulse interface facilitates function expanding and automatic management, forward electric energy and backward electric energy are accumulated, backward electricity stealing can be effectively prevented, and the single phase electronic watt-hour meter is a preferred measuring product of a power supply department.

Description

technical field [0001] The technical proposal belongs to electric power metering devices, in particular to a single-phase electronic electric energy meter. Background technique [0002] In the prior art, the electric energy meter used to measure AC electric energy with a rated voltage of 220V and a frequency of 50Hz must meet the technical requirements of GB / T17215.321-2008 "Special Requirements for Alternating Current Measuring Equipment Part 21: Static Active Energy Meter" (Level 1 and Level 2)" National Standard. However, existing products cannot meet the high current range requirements. Contents of the invention [0003] In order to solve the above-mentioned problems existing in the prior art, this technical solution proposes a new single-phase electronic watt-hour meter, specifically as follows: [0004] A single-phase electronic watt-hour meter, comprising a watt-hour meter metering unit, a voltage adopting unit, a current sampling unit, an LED, a counter, and a po...

AI Technical Summary

Problems solved by technology

However, existing products cannot meet the high current range requirements

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