1、 Overview

DDSY1791 Water and Electricity One Card Plug in Single phase Prepaid Electric Meter adopts advanced smart card technology and microelectronic metering technology, which has the advantages of high accuracy, multiple functions, low power consumption, security and confidentiality, and simple operation. The product complies with the standards of GB/T18460.3-2001 "Prepaid Energy Meters" and GB/T17215.321-2008 "Level 1 and Level 2 Static AC Active Energy Meters".

2、 Functional Features

1. Prepaid function: Pay first and then use electricity. Power will be automatically cut off if overdue, and power will be automatically restored after swiping the card again for renewal.
2. Constant display alarm function: Users can set their constant display alarm value. When the remaining battery level is below this value, users will be reminded to purchase electricity in a timely manner.
3. Power outage alarm function: Users can set their power outage alarm value. When the remaining power reaches the power outage alarm value, the meter will automatically power off. At this time, the card can still be plugged in to power on, reminding users to purchase electricity immediately.
4. Power off function: When the remaining power in the meter is zero, the meter will automatically power off.
5. Dynamic encryption: Using dynamic encryption algorithms, it has strong confidentiality, and the data in the table can be retained for 10 years after power failure.
6. Current limiting power-off: When the current exceeds the set value, the meter will be powered off for protection. When the load decreases, the meter will automatically restore power.
7. One card function: One card water meters can be paired with one card for use.

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 power, alarm power, capacity limiting method, and capacity limiting power into the IC card.

8. Electricity card usage: Insert the power purchase card into the card slot. If it is a valid power purchase card, the meter will automatically read the data into the meter. The LCD display screen will show the remaining amount, power purchase amount, total purchase amount, total power consumption, user number, and constant in sequence. Please keep the card properly when unplugged.

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, it will be turned off for 3 minutes after 60 seconds of over capacity power consumption; If the user inserts the card and responds, the power supply can be immediately restored.

11. Accumulation limit: If the purchased electricity+remaining electricity>accumulation limit (10000kWh), the purchased electricity will not be read in, and the display will show an "Error=10" prompt, indicating that the stored electricity 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.

13. Power outage warning: When the remaining power in the meter is less than the "trip alarm power", the "alarm indicator light" will remain on, and the LCD will display the "trip" prompt. The relay will trip. At this time, the user can insert the power purchase card into the meter once, and the meter will close. 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 time and unable to use electricity. 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.

15. Fault declaration: When the remaining power is displayed as zero or negative, a "trip" prompt will be displayed. If the meter continues to operate, the user should immediately purchase electricity and proactively report the situation to the power supply department.