1、 Overview

DDSY6607 electronic single-phase prepaid energy meter adopts advanced application specific integrated circuit design and fully automatic surface mount (SMT) production process manufacturing. The circuit design and component selection of the electric energy meter are based on a large environmental tolerance, which can ensure long-term stable operation of the whole machine, high precision, high overload, low power consumption, and high reliability performance. Adopting advanced intelligent IC card technology that meets international standards to achieve prepaid payment, with built-in magnetic holding relay. By controlling the relay to control the on and off of the load, the function of urging users to buy electricity before using it can be achieved.

The product complies with GB/T17215.321-2008Level andAll technical requirements for Level 2 Static AC Active Energy Meter and GB/T 18460.3-2001 IC Card Prepaid Electricity Sales System Part 3: Prepaid Energy Meter.

2、 Working principle

1. Working principle diagram

The electric energy meter obtains voltage sampling signals from the voltage divider, current sampling signals from the current divider, voltage current product signals from the multiplier, and then generates a counting pulse proportional to the product of voltage and current through frequency conversion. Through frequency division, it drives the stepper motor to measure electricity.

2. Data processing

Electricity metering pulse is transmitted through a photoelectric couplerThe CPU processes and stores the computed data in memory. The information system is managed by a computer, and through an IC card reader/writer, a certain amount of electricity and monitoring requirements are written into the IC card input table of the microprocessor system. After being processed by the CPU, it provides display and alarm status signals.

3、 Specifications, models, and technical parameters:

1. Specification and model

2. Main technical parameters:

a、 Basic error:

b、 Gas parameters (reference conditions):

Starting current: 0.4% Ib

Power consumption: Voltage line<1.0W，3.0VA；

Current line<1.0VA

Stealth: equipped with logic anti creep circuit

Voltage range:220V±10%

Working temperature range: -25 ℃~+65 ℃

Power failure data storage time>20 years

4、 Installation and use

1. The electricity meter has been inspected and qualified before leaving the factory, and sealed with a lead seal before installation and use. If there is no lead seal or it has been stored for too long, relevant departments should be asked to re verify and seal it before installation and use.

2. The electric meter should be installed in a dry and ventilated place, and the bottom plate for installing the electric meter should be fixed on a sturdy, fire-resistant, and vibration resistant wall. The height of the electric meter is about 1.8 meters.

3. Install and wire according to Figure 1 and Figure 2, tighten the wiring screws, and secure the connecting plate inside the terminal box.

4. The reading of an electric meter connected through a transformer must be multiplied by the transformation ratio to obtain the actual amount of electrical energy.

5. One table, one card: The IC card held by the user cannot be exchanged. In case of loss, a replacement card should be purchased from the power supply department (sales office).

6. Preparation for purchasing electricity: Before purchasing electricity, the user must insert the IC card into the card slot once to facilitate sending the data in the meter back to the computer database.

7. Electricity purchase method: When selling electricity, insert the IC card into the IC card reader and operate the computer to use it

Encrypt and write the account number, pre purchased electricity, alarm electricity, capacity limiting method, and capacity limiting power, etcIC card.

8Electricity card usage: Insert the power purchase card into the card slot. If it is a valid power purchase card, the electricity meter will automatically read the data into the meter,LCDThe display screen sequentially shows:Please keep the remaining amount, purchase amount, total purchase amount, total electricity consumption, user ID, and constants properly when unplugging the card.

9. Operation display: During the operation of the electricity meter, it alternately displays the remaining amount, purchase amount, total purchase amount, total electricity consumption, user number, and constant in the meter.

10. Overcapacity alarm: During the operation of the electricity meter, if the "alarm indicator light" flashes rapidly, it warns the user that the electricity has been exceeded. If the meter is set to the over capacity power-off limit mode, the over capacity electricity consumption will be 60%In seconds, the brake will be pulled3 minutes; If the user inserts the card and responds, the power supply can be immediately restored.

11. Storage limit: If the purchased electricity+remaining electricity>storage limit (10000kWh)If the purchased electricity is not read in, the display will showError=10 "prompt, the battery level in the card is still valid.

12. Warning reminder: When the remaining power in the meter is less than the "audible and visual alarm power", the "alarm indicator light" will flash (with an interval of 1 second) to display a reminder to the user to purchase electricity.

13Power outage warning: When the remaining battery level in the meter is less thanWhen the "power alarm" is triggered, the "alarm indicator light" stays on, and the LCD displays the "power alarm" prompt. The relay is triggered, and the user can insert the power card into the meter once. The meter will close, and the "alarm indicator light" will continue to stay on. At this time, the user should quickly go to the power supply department to purchase electricity to avoid being unable to purchase electricity in a timely manner and unable to use it. If the IC card of this meter cannot be found after pulling the switch, you can borrow a neighbor's IC card to insert it and restore power supply.

14. Power purchase reminder: When the remaining power in the meter is less than the "alarm power", the "alarm indicator light" will remain on as a constant reminder.

15Fault declaration: When the remaining battery level is displayed as zero or negative, displayIf the electricity meter continues to operate, the user should immediately purchase electricity and proactively report the situation to the power supply department.