A power-on / off test circuit and test device for an electricity meter

By designing a power-on/off test circuit for electricity meters and utilizing the cooperation of the main control module and the relay module, accurate power-on/off testing of smart electricity meters was achieved. This solved the problem of the inability to accurately control the power-on/off time in existing technologies, and improved testing efficiency and effectiveness.

CN224287121UActive Publication Date: 2026-05-26SHENZHEN FRIENDCOM TECH DEV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHENZHEN FRIENDCOM TECH DEV
Filing Date
2025-01-16
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In existing technologies, when conducting power outage and power-on tests on smart meters, it is impossible to accurately control the power outage and power-on time, which affects the test results and is inefficient.

Method used

A power-on/off test circuit for an energy meter was designed, including a main control module, a 485 communication module, a power supply module, and a relay module. The 485 communication module receives test parameters from the host computer, and the main control module controls the relay module to perform precise power-off/off tests, achieving millisecond-level time control.

Benefits of technology

It enables millisecond-level power-on/off and power-off testing of electricity meters, improving testing efficiency, avoiding frequent manual operations, and enabling timely detection of problems and defects in electricity meters.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224287121U_ABST
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Abstract

This utility model discloses a power-on / off testing circuit and device for electricity meters. The circuit includes a main control module, a 485 communication module, a power supply module, and a relay module. The 485 communication module is connected to a host computer and the main control module, and is used to receive power-on / off test parameters sent by the host computer, convert the test parameters into electrical signals, and input them to the main control module. The power supply module is connected to both the main control module and the electricity meter under test, and is used to provide power to both the electricity meter and the main control module. The relay module is connected to both the main control module and the electricity meter under test, and is used to control the electricity meter under test to perform power-on / off testing according to the electrical signals received by the main control module. This utility model can improve the testing effect and efficiency of power-on / off testing of electricity meters.
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