Single-phase static electric energy meter and circuit control method thereof

Abstract

The invention relates to a single-phase static electric energy meter and a circuit controlling method, wherein, the electric energy meter comprises a metering unit, a recording unit, a communication unit, a monitoring unit, a self-checking unit, a displaying unit and a time sharing unit. The metering unit adopts single-phase three-wire, meters maximum demand, and has high current and a wide metering range; the recording unit is used for recording electric energy, the maximum demand, demand generation time, recording a load curve, and recording events such as programming, timing, demand clearing and time zone switching; the communication unit is used for carrier communication on an automatic networking power line, and provides the optical port communication conforming to ANSI specification; the monitoring unit is used for detecting the voltage, the current, the active power, the apparent power and the frequency of an electric network and detecting undervoltage, excess voltage, current loss and over-current; the self-checking unit is used for checking time sharing setting errors, and metering the errors, etc.; the displaying unit is used for normally performing liquid crystal display at the low temperature of subzero 40 DEG C; and the time sharing unit is used for meeting the multiple rate time share of the ANSI standard. The invention provides the single-phase static electric energy meter which is provided with more complete functions and more suitable for the use requirements of multiple levels of users.

Description

technical field [0001] The invention relates to an electric power meter, in particular to a single-phase static electric energy meter and its circuit control method. Background technique [0002] Existing ordinary single-phase electric energy meters generally only have the functions of measuring electric energy and time-sharing multi-rate, and can display normally at low temperatures. Generally, LED digital tubes are used, with less display content and high power consumption. In addition, the existing ordinary single-phase electric energy meters generally do not have the function of remote meter reading. Even the electric energy meters with the remote meter reading function still use wired transmission, the wiring is troublesome, and generally do not have demand metering, event records, load curves, measurement Voltage, current, active power, apparent power, frequency, etc., detection of undervoltage, overvoltage, loss of current, overcurrent and other functions. [0003] D...

AI Technical Summary

Problems solved by technology

[0002] Existing ordinary single-phase electric energy meters generally only have the functions of measuring electric energy and time-sharing multi-rate, and can display normally at low temperatures. Generally, LED digital tubes are used, with less display content and high power consumption.

In addition, the existing ordinary single-phase electric energy meters generally do not have the function of remote meter reading. Even the electric energy meters with remote meter reading function use wired transmission, the wiring is cumbersome, and generally do not have demand metering, event records, load curves, measurement Voltage, current, active power, apparent power, frequency, etc., detection of undervoltage, overvoltage, loss of current, overcurrent, etc.

[0003] Due to the above-mentioned defects in the existing ordinary single-phase electric energy meter, it does not meet the needs of customers at a higher level

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