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DDZY6-Z single-phase cost control intelligent energy meter
The DDZY6-Z single-phase cost control intelligent energy meter (hereinafter referred to as the energy meter) is composed of a single-phase static ener
Product details
The DDZY6-Z single-phase cost control intelligent energy meter (hereinafter referred to as the energy meter) is composed of a single-phase static energy meter metering unit and a rate unit. It has real-time measurement, processing, and display of electrical parameters such as voltage, current, power factor, and frequency. The energy meter adopts a large screen LCD display and also has infrared RS485、 Communication interfaces such as carrier and low-power wireless, with cost control function. This electric energy meter is a high-tech product manufactured using advanced ultra-low power large-scale integrated circuit technology and SMT process. The key components are selected from internationally renowned brands of long-life devices, which improves the reliability and lifespan of the product. The electric energy meter has significant advantages such as high measurement accuracy, good stability, strong overload capacity, and high reliability.
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1. Measurement function
a) It has the functions of measuring positive and negative active energy, as well as storing their data. The positive and negative energy are measured separately, and the default combination of active energy is the sum of the absolute values of positive and negative energy.
b) It has a time-sharing metering function, which accumulates and stores the total, peak, off peak, and valley electrical energy according to the corresponding time period.
2. Timing function
a) Adopting a built-in hardware clock circuit with temperature compensation function, the internal clock terminal outputs a frequency of 1Hz.
b) The clock has functions such as calendar, timing, and automatic leap year conversion.
c) Use environmentally friendly lithium batteries as backup power for clocks; The backup power supply for the clock does not need to be replaced during the service life of the energy meter, and can maintain the correct working time of the internal clock for at least 5 years after power failure; When the battery voltage is insufficient, the energy meter will give an alarm prompt.
d) There are security measures to prevent unauthorized personnel from operating the time, date, and time settings of the electric energy meter through communication interfaces such as RS485 and infrared. In addition to broadcasting the time, ciphertext must be used for calibration.
e) The electric energy meter only accepts clock error broadcast timing of no more than 5 minutes; It is allowed to calibrate once a day (when the date changes, it is allowed to calibrate), and it should be avoided as much as possible within 5 minutes before and after the settlement data transfer operation of the energy meter.
f) Within the temperature range of -25 to+60 ℃, the clock accuracy is ≤± 1.0/s/d; At a reference temperature of 23 ℃, the clock accuracy is ≤± 0.5/s/d.
3. Rate and Time Period
a) Supports four rates: peak, off peak, flat, and valley.
b) It has two sets of programmable rates and time periods, and can start using another set of rates and time periods at a set time point.
c) At least 2 time zones can be set for each rate period throughout the year; At least 8 time periods can be set within 24 hours; The minimum interval between time periods is 15 minutes; The time period can be set across zero points.
d) Support the setting of special rate periods for public holidays and weekends.
4. Meter reset to zero
a) Clear the stored electrical energy, frozen amount, event records, load records, and other data in the energy meter.
b) The reset operation is permanently recorded as an event and has security measures to prevent unauthorized personnel from operating it.
c) The bottom reading of the electric energy meter can only be reset to zero and cannot be set.
5. Data storage
a) Capable of storing one-way or two-way total electricity and electricity rate data for up to 12 settlement days.
b) Missing the settlement time during power outage, being able to complete the energy data of the previous 12 settlement reports when powered on.
c) In the event of a power outage in the energy meter, all data related to settlement shall be kept for at least 10 years, and other data shall be kept for at least 3 years.
6. Freeze function
a) Timed freezing: Freeze electrical energy data according to the agreed time and interval; Each frozen amount should be saved at least 60 times.
b) Instant freeze: Freeze the current calendar, time, all electrical energy, and important measurement data under abnormal conditions; Instantaneous freezing saves the data from the last 3 times.
c) Agreed freeze: Freeze the electrical energy and other important data at the time of conversion between new and old rates/time periods, tiered electricity price conversion, or when the power company deems it necessary.
d) Daily freeze: stores electrical energy at midnight every day, capable of storing data for 62 days. If the daily freezing time is missed during a power outage, the frozen data for the entire day will be replenished when the power is turned on, up to a maximum of the last 7 days of frozen data.
e) Whole hour freeze: stores the total active energy at the hour or half hour, and can store 254 data points.
f) The frozen content and corresponding data identification comply with the requirements of DL/T 698.45 and its filing documents.
7. Event record
a) Permanently record the occurrence time of the reset event on the energy meter and the energy data at the time of reset.
b) Record the total number of programming attempts, the time of the last 10 programming attempts, operator code, and data identification of programming items.
c) Record the total number of calibration times (excluding broadcast calibration), the time of the last 10 calibration times, and the operator code.
d) Record the total number of power outages, as well as the last 10 instances of power outages occurring and ending.
e) Record the last 10 tripping and closing events, including the time of occurrence, operator code, and electrical energy.
f) Record the total number of times the meter cover has been opened, the occurrence and end times of the last 10 meter cover opening events, and the electrical energy data at the time of the opening of the meter cover. During a power outage, the electrical energy meter only records the earliest meter cover opening event.
8. Communication function
8.1 485 Communication
a) The RS485 interface and internal circuit of the energy meter are electrically isolated, and there is a failure protection circuit.
b) The RS485 interface meets the electrical requirements of DL/T 698.45 and can withstand AC voltage of 380V without damage for 2 minutes.
c) The communication rate of RS485 interface can be set, with standard rates of 1200bps, 2400bps, 4800bps, 9600bps, and default value of 9600bps.
d) RS485 interface communication follows the DL/T 698.45 protocol and its filing documents.
e) The energy meter can communicate using the RS485 interface within 3 seconds after being powered on.
f) The RS485 interface can ensure normal communication in both forward and reverse wiring on the 485 bus.
8.2 Infrared Communication
a) Equipped with modulation or contact infrared interfaces.
b) The electrical and mechanical performance of the infrared interface should meet the requirements of DL/T 698.45.
c) Infrared effective communication distance ≥ 5 meters.
d) The default communication rate for modulated infrared interfaces is 1200bps.
e) Infrared communication follows the DL/T 698.45 protocol and its filing documents.
f) Infrared authentication is required before infrared operation, and the operation permission needs to be opened.
8.3 Carrier Communication
a) The electric energy meter can be configured with narrowband or broadband carrier modules.
b) The communication between the electric energy meter and the carrier mode communication block follows the DL/T 698.45 protocol and its filing documents.
c) The default value for interface communication rate is 9600bps.
d) Adopting an external plug and play carrier communication module, the carrier communication interface has a failure protection circuit.
e) During carrier communication, the metering performance, stored metering data, and parameters of the electric energy meter are not affected or changed.
f) The energy meter can perform carrier communication within 5 seconds after being powered on.
8.4 Micropower wireless communication
a) The communication between the electric energy meter and the micro power communication module follows the DL/T 698.45 protocol and its filing documents.
b) The default value for interface communication rate is 9600bps.
c) Adopting an external plug and play micro power communication module, the micro power communication interface has a failure protection circuit.
d) During low-power communication, the metering performance, stored metering data, and parameters of the energy meter are not affected or altered.
9. Signal output
9.1 Electric energy pulse output
a) It should have optical pulse output and electrical pulse output proportional to the measured electrical energy (active/reactive).
b) The light pulse output adopts ultra bright and long-life LED devices.
c) The electrical pulse output should have electrical isolation and be able to be collected from the front.
9.2 Multi functional signal output
a) The multifunctional signal output terminal can output time signals or time period switching signals; Two types of signals are set and converted through software; The multifunctional signal output of the energy meter is initialized as a time signal output when it is powered on for the first time or when it is powered off and then powered on again.
b) The time signal is a second signal; The time interval switching signal is a pulse signal.
c) When the time period changes, a time period switching signal is issued, and even if the rate remains unchanged, the time period switching signal is still output.
5.9.3 Control Output
The electric energy meter can output electric pulses or level switch signals (output mode can be set), and control external alarm devices or load switches.
10. Display function
a) When the electric energy meter is in normal working condition for button pressing, infrared communication, and other operations, the LCD will activate the backlight. After the backlight is triggered by pressing a button or inserting a card, it will automatically turn off if there is no operation for 60 seconds; When triggered by infrared, turn off the backlight after 2 automatic rotation cycles.
b) The display content of the electric energy meter is divided into three types: numerical value, code, and symbol; The display content can be set through programming.
c) The energy meter has the function of waking up and displaying after a power outage.
d) Equipped with automatic loop and button display modes; The automatic loop display time interval can be set within 5-20s.
e) Equipped with power on full display function, the energy meter displays the full LCD screen within 1 second after power on, and the LED lights are all on (except for pulse lights); The backlight is on, and the LCD display and LED lights are on. The default time for backlight on is 5 seconds, and the time interval can be set within 5-30 seconds.
f) It has the function of fully displaying the charged energy meter's LCD screen and fully illuminating the LED lights (except for pulse lights) through communication commands, with a duration of 10 seconds for the LCD display and LED lights to remain on.
g) The electric energy meter can display the status of the test key, official key, etc. on the LCD screen.
11. Cost control function
a) The billing of electric energy meters is achieved through carrier waves, 485 ports, or wireless methods and remote electricity sales systems for cost control. The user's electricity bill is stored in the main station, and the electric energy meter is just a measuring instrument and control execution mechanism.
b) The energy meter achieves cost control function through remote commands, including tripping, closing permission, alarm, alarm release, power protection, and power protection release. When the main station detects that the user's remaining electricity bill is insufficient, it sends an alarm command to remind the user to pay for electricity as soon as possible; When the remaining electricity cost of the user is exhausted, the main station issues a trip command to remind the user that they must purchase electricity; When there are special circumstances that prevent power outages (such as during the Spring Festival), the main station can issue a power protection command in advance to ensure that the energy meter will not trip under any circumstances.
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