c. When the remaining power is zero, the meter outputs a trip signal.

3、 Working principleWhen the electric energy meter is working, the voltage and current are sampled separately by the sampling circuit, and then multiplied by the dedicated integrated circuit for electric energy processing before being sent toCPUProcess it, and finally,CPU

Send the processed data to output devices such as the display and communication sections as needed.Managed by a computer information system, throughICCard reader/writer, capable of writing a certain amount of power and monitoring requirementsICThe microprocessor system in the card input table, throughCPU

After calculation, provide display, alarm, and cut-off status signals.

4、 Technical indicators1.0 4.1 Accuracy Level Merit2.0 Reactive power

level4.2 Reference voltage

220/380V4.3 Rated current3X 1.5(6)A、2.5(10)、5(20)A、10(40)A、15(60)A、

20(80)A4.4 Rated frequency

50Hz14.5 Starting currentLevel: ≤ 20.004InLevel: ≤

0.005In

4.6 Stealth with anti creep logic design

4.9 Electrical Parameters	Operating Voltage0.9Un～
1.1Un	Extreme working voltage0.75Un～
1.15Un	Voltage line power consumption≤2Wand
5VA	Power consumption of current circuit＜
1VA	Data backup battery voltage3.0V

DC

4.10 Rate Working ParametersClock accuracy(Daily error	)≤0.5S (23℃
)	Battery capacity≥
1000mAh	Data retention time after power outage10≥year(Use new batteries

)

4.11 Climate conditions	-20Normal operating temperature℃+50～
℃	-30working temperature limit℃+60～
℃	-40Storage and transportation temperature℃+70～
℃	Storage and working humidity≤

85%

4.12 Technical Parameters	4
Number of rates	12
Number of time periods	2
Number of time zones	0Measurement range～
999999.99 kWh	displayLCD (Liquid Crystal Display)（LCD
）	Baud rateRS485:1200bps～9600 bpsInfrared port
: 1200bps	Communication Protocol《DL/T645-2007

Meter number and factory number: the identification number for communication between the handheld computer and the energy meter. When reading or setting up meters, it is necessary to input the meter number or factory number of the energy meter in order for the handheld computer to communicate with the energy meter normally. The meter number can also be assigned to the user's account through the purchase of a power card. Can be viewed through the reading button3“3.1B”

The content of the item indicates the table number of the table. The factory number is assigned when the electricity meter leaves the factory and printed on the meter nameplate.seven point zero fiveRotation time: The display time of each data item during rotation, with the default rotation time beingIn seconds.seven point zero six28Wheel display content encoding: The encoding of the wheel display content that users can set according to their needs, please refer to the appendix for details0.28seven point zero seven24Automatic meter reading date and time: programmable meter reading date and time. As per the script“3.1A”When the item (automatic meter reading date) is entered, it will be coded as

28 00

The electricity meter will be used on a monthly basis040503 daily041003Automatically save the current data to last month's records. Users can set their content as needed. (Date greater than)

Time setting01, then automatically switch to0201 0003）04seven point zero eight

Primary and secondary time periods: Two time periods can be set, namely two sets of rates, such as daylight saving time.24seven point zero nine

Starting and ending dates of sub time periods: such as setting a start date

Stop date.seven point one zero

Time period and rate number: The peak rate number is

The peak rate number is

The flat rate number is

The grain rate number is

.

seven point one one

Public holidays: can be set oncePublic holidays.seven point one twoWeekends: You can specify the middle of each week as a weekend.seven point one threeNon business hours: You can set daily non business hours. For example:18:00-08:30.seven point one fourEmergency credit limit: It can be set to allow users to have emergency credit limits during public holidays, weekends, and non business hours.The above management parameters can be transmitted from the management system to the user's electricity meter through preset cards and purchase cards.

seven point one five1Date: should be the current accurate date.seven point one sixTime: should be the current accurate time.The date and time should be regularly checked on-site.8、 Installation and wiringeight point oneThe instrument is inspected and sealed with lead before leaving the factory. Before installation and use,Check if the lead seal is intact

,Once the lead seal is intact, it can be installed and used,For instruments without lead seals or with a long storage period,

Relevant departments should be requested to conduct a re inspection

eight point three

3.3The instrument should be wired correctly according to the wiring diagram. It is recommended to use copper wire or copper joint for the incoming wire of the terminal box

,

The screws inside the terminal box should be tightened2,08Avoid burning caused by poor contact or overheating due to thin leads.008.4 The instrument will enter normal operation after being powered on with the correct wiring as described above.119、 Transportation and storage30The product should not be subjected to severe impact during transportation and unpacking, and according to

GB/T5464-19953The General Technical Conditions for Instrument Packaging stipulate transportation and storage.11Inventory and storage should be stored on racks in their original packaging conditions, and the stacking height should not exceed30Layer.18The storage location should be clean, and the ambient temperature should be30～

℃, relative humidity not exceeding485%18And there are no harmful substances in the air that can cause corrosion.3010、 Guarantee period23From the date of sale, if the electric energy meter is found to not meet the requirements specified in the technical specifications, provided that the user complies with the instructions and the manufacturer's lead seal is still intact, the company will provide a one-year return, three-year replacement, and five-year repair guarantee.00Appendix

Main time period and rate setting51. Set corresponding electricity prices for peak, off peak, off peak, and off peak rates according to the prescribed electricity pricing policy.23auxiliary word for ordinal numbers00Time period:07：00arrive

：5formant

auxiliary word for ordinal numbers

3.7Time period:

：

arrive

：8119Flat section4auxiliary word for ordinal numbers

Time period:：arrive：

formantauxiliary word for ordinal numbersTime period:：

arrive：Valley sectionThe minimum interval between time periods isMinutes, the time period can cross zero.Unable to provide emergency credit, therefore the daily time slot number does not work.

Setting of sub time periodsDivide the internal rates of the meter into two sets, one as the main rate (operating rate) and the other as the secondary rate (standby rate). The primary and secondary rates can be switched between each other (following the setting command). If the superior notifies that the rates and time periods need to be adjusted, the staff can set them several days in advance and ensure that all the meters set are converted on the same day and at the same time. This not only provides sufficient working time (lead time), but also ensures that policies are implemented at the same time (reducing the difficulty of electricity calculation software)

A、 The sub time period setting is similar to the main time period setting, please refer to the main time period section.B、 Time period start and end date setting: identification code（）Set score

Scenario:i. As from

04.10.011Starting from [date], execute the sub period:8119=000000 041001²ii.Execute from the current date until

04.10.012Day end:

8119=041001 000000

iii.3follow004.06.01

From day to day2 04.10.01

Date execution:

8119=041001 040601iv.Stop sub period:8119=000000000000The start and end dates of the sub period are set in811F

The load control package is transmitted to the user's electricity meter together.

4、 Accident handling:（

）When there is an unexpected malfunction or damage caused by human operation (the meter cannot operate) in the already opened meter, open the meter and save the data stored in the already opened meter

EPROMIf the display panel is unplugged and replaced with a new meter, the new meter can replace the original one and all data and fault tables are the same. (The nameplate of the electric meter also needs to be replaced with a new one)8100（8101）When the allowed load and remaining power exceed the pre-set values, and the available power of the meter is zero, the meter will output an alarm or trip signal.8102Attention: When both alarm and trip are selected, trip takes priority over alarm.8103（8104）When the remaining electricity on the meter is8105If the external power supply circuit cannot be disconnected due to emergency credit or other reasons, the electricity meter will start calculating the overdrawn power and automatically deduct the overdrawn power when the next power card is inserted.8106appendix8107User Attention Notice81081. One table, one card:8109The user holds

IC

Cards cannot be exchanged. If lost, please go to the power supply department(Electricity sales office)Purchase an additional one.302. Preparation for purchasing electricity:3Before purchasing electricity, users mustICInsert the card into the electricity meter once to facilitate sending the data in the meter back to the computer database.3. When purchasing electricity, please declare the amount of electricity to be purchased and the alarm reminder amount.4. Electricity card usage: Insert the purchase card into the electricity meter. If it is a valid purchase card, the electricity meter will automatically read the data into the meter,

LCDThe display screen sequentially shows:Total purchased electricityRemaining battery capacityOverdraft electricityPurchase electricityMeter frequency

Alarm battery levelAccumulation limitCredit limitLimiting powerPurchase information such as purchase date. Please store the unplugged card properly.25. Operation display: During the operation of the electricity meter, it alternately displays the total average electricity, peak and valley electricity, remaining electricity, and operation period in the meter.6. Overcapacity alarm: During the operation of the electricity meter, if“call the police”LED1If the indicator light flashes rapidly, it warns the user that the battery has exceeded its capacity. If the meter is set to the over capacity power-off limit mode, then the over capacity electricity will be usedIn seconds, the brake will be pulledMinutes and countdown display(180second2)

Time to restore power supply; The user's card insertion response can immediately restore power supply.107. Accumulation limit: If purchased electricity+remaining electricity>Accumulation limit (e.g: 9999kWh）If the purchased electricity is not read in, the display will show“8106 NNNNNN”Reminder: The battery level in the card is still valid.

8. Warning reminder: When the remaining battery level in the meter is less than“Alarm power level”ofWhen doubled,“call the police”LED

The indicator light will flash at intervals ofDisplay a reminder to the user to purchase electricity in seconds. If the user responds by inserting the card,“Alarm indicator light”

The flicker interval has changed to0Seconds can avoid power outage warnings.9. Power outage warning: If the user does not respond by inserting the card during the warning reminder, the remaining battery level will be the alarm battery level agreed upon by the user (or the current purchased battery level)%When the electricity meter is turned off, a warning will be issued for power outageICPlug in the meter once to restore power supply. If this table cannot be found after pulling the switch

IC