1、 Overview

The DTSY6607 electronic three-phase prepaid energy meter adopts advanced application specific integrated circuit design and is manufactured using fully automatic surface mount (SMT) production technology. 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 meets all technical requirements of GB/T17215.321-2008 "Level 1 and Level 2 Static AC Active Energy Meters" and GB/T 18460.3-2001 "IC Card Prepaid Electricity Sales System Part 3: Prepaid Energy Meters".

2、 Working principle

1Working 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.

The electric energy metering pulse is sent to the CPU through a photoelectric coupler for processing, and after calculation, it is stored in the 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 read and write the user's electricityNumber, pre order power, alarm power, capacity limiting method, and capacity limiting power are encrypted and written into the IC 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.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.

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.

Figure 1 Outline drawing

Functional terminal wiring