Common terminology of multifunction meter

1. Meter reading-that is, the various electric energy parameters of the electric meter are frozen and transmitted to other equipment.

Automatic meter reading day-the monthly change time of each month. At this time, the electric energy parameters of the electric meter are frozen and rolled into the memory of the electric meter.

Meter reading after power failure——Meter reading can be performed even when there is no mains power.

Meter setting-Peripherals set the management parameters of the meter through the 485 or infrared port.

Meter calibration-mainly refers to the error adjustment of the meter through the 485 or infrared port.

2. Demand period-continuous equal time interval for measuring average power.

Demand-the average power measured during the demand period.

Maximum demand——the maximum value among the continuous (slip time) measured demand in the specified time interval.

slip time-successively recursively measure the time interval of the maximum demand less than the demand period. 3. Daily period-several consecutive closed time periods divided into 1 day (24 hours).

Number of daily periods-the number of consecutive closed time periods divided into 1 day (24 hours).

Daily time period table-1 day is divided into time periods to form a table.

Number of daily timetables——Different timetables make up different daily timetables. One division method corresponds to one daily time slot table, and several classification methods correspond to several daily time slot tables, and the total number is the number of daily time slot tables.

Daily timetable number-each day timetable is compiled with a number, that is, the daily timetable number.

Rates-Electricity has different charges at different time periods, and each charge is one rate.

Number of rates-There are several types of rates, and the total number of rates is the number of rates.

rate number-each rate has a corresponding number, which is represented by 1, 2, 3, 4, or sharp, peak, flat, and valley. There are generally at most four types at present.

Year time zone——Several consecutive closed date intervals divided into one year.

Number of time zones in a year-the number of consecutive closed date intervals divided in a year.

4. Rotary display time-the display time of each item of data (screen) when the electric energy meter is displayed in turn.

Cycle display time-the total time displayed by the electric energy meter in turn.

Stop display time-the time for the electric energy meter (after a cycle display time) to stop displaying.

5. Six types of load curve-according to the time interval set by the user, the contents of the selected six types of data are recorded in rolling data. The curve formed by this data is the load curve. The interval time is 1~99 minutes, which can be set arbitrarily. The six types of sampled data are:

One category: total active power, total forward active power, and total reverse active power;

Two categories: total reactive power, quadrant reactive power, quadrant reactive power, I IV II quadrant reactive power, III quadrant reactive power;

Three categories: A-phase voltage, B-phase voltage, C-phase voltage;

Four types: A-phase current, B-phase current, C-phase current;

Five categories: total power factor, A-phase power factor, B-phase power factor, C-phase power factor;

Six categories: instantaneous reactive power, A-phase reactive power, B-phase reactive power, and C-phase reactive power.

6. Load representative day—a day (00-28) set arbitrarily in each month. The electric meter records the hourly load electric energy from 00:00 to 23:00 on the load representative day of each month.

7. Electric energy (quantity) freezes—that is, the electric energy (quantity) at that time is recorded at a certain moment and no longer changes.

Freezing of zero-point electric energy-at the zero crossing every day, the meter can calculate the current rates and total electric energy of forward active power, various rates and total electric energy of reverse active power, various rates and total electric energy of forward reactive power, and reverse zero. All tariffs and total electrical energy are frozen.

Instant electric energy freezing-through the 485 port or infrared communication, the meter will be able to change the current forward active power rates and total electrical energy, reverse active power rates and total electrical energy, forward reactive power rates and total electrical energy, and reverse Reactive power rates and total electrical energy freeze.

8. Management parameters-various parameters set in advance in the meter. Such as time period, fee rate and baud rate, etc.

Electric energy parameters-various data related to electrical energy recorded in real time during the operation of the electric meter. Such as power, voltage, current and power factor, etc.

9.485 Interface——The interface for communication or dialogue (communication) between the meter and the outside world. For example, common handheld computers and PC upper computers communicate with the electric meter through this interface. It is wired, and the junction (wiring) is on the terminal.

Infrared port-another interface for communication or dialogue (communication) between the meter and the outside world. For example, the common infrared remote control communicates with the meter through this interface. It is wireless, and the junction is receiving and transmitting diodes.

Baud rate——1200bps 2400bpb 4800bps 9600bps

10. Four quadrants of reactive power-the horizontal axis of the measurement plane represents the voltage vector U, and the current vector has a phase angle ø with respect to the voltage phasor U.

11. Electric energy pulse-a series of digital pulses representing the magnitude of electric energy are electric energy pulses. It can be output through the pulse port, on the terminal.

Pulse constant-the number of flashes of the electric energy indicator corresponding to one kilowatt-hour of electricity measured by the electronic electric energy meter.

Remote output-another way of electric energy pulse output. The remote port is also on the terminal. 12. Clock frequency-the frequency used by the meter for timing.

13. Voltage assessment-a method used to measure voltage quality in an electric meter. Such as minimum qualified voltage, maximum voltage value and time of occurrence and so on.

14. Loss of voltage-is a phenomenon when the voltage meets certain conditions.

XX.XX——absolute value of current YYYY——absolute value of voltage Vector voltage judgment method and condition: set judgment method according to customer requirements

current loss-is a phenomenon when the current meets certain conditions

XX.XX——absolute value of current ZZ——current unevenness

Current unbalance rate = (maximum phase current-certain phase current)÷maximum phase current×100% The current loss judgment method is set according to customer requirements

15. Programming-generally refers to the read and write operations on the electric energy meter (mainly refers to the write operation), such as meter setting,. School hours, and school schedules.

16. Meter number-the identification number of the communication between the peripherals such as PC or palmtop computer and the electric energy meter.

User number-can be used as a number for power user management.

Equipment number-can be used as a device management number.

17. Ordinary time calibration-usually refers to the time calibration of a single meter (one at a time).

Broadcast timing-usually refers to the simultaneous timing of multiple meters (multiple at a time).

18. Power failure wakeup——When there is no mains power, the meter can be restored to display by pressing buttons, remote control, etc. 19. A/D conversion-in digital circuits, refers to the process of converting analog quantities into digital quantities.

Energy (metering) chip-is a chip that converts sampled voltage and current signals into data related to electrical energy through a series of operations.

CPU-is a single-chip microcomputer (microprocessor). Perform a series of complex calculations on the input data through a pre-programmed program to get the expected result, and output the result.

Memory-the chip that stores the program and data information in the electric energy meter.

20. Pocket PC-one of the commonly used external devices for electric energy meters. It can be used to set, calibrate and read the electric energy meter.

Infrared remote control-is one of the commonly used external devices for electric energy meters. The function is similar to that of a handheld computer, and it is wireless operation.

The multi-function meter is composed of a measurement unit and a data processing unit. It has programmable measurement, display, digital communication and electric energy pulse transmission and output and other multi-function smart meters, which can complete electric energy measurement, electric energy measurement, data display, acquisition and transmission , Can be widely used in substation automation, power distribution automation, intelligent buildings, and internal electric energy measurement, management, and assessment of enterprises.