DTSY866/DSSY866 Three phase electronic prepaid energy meter (One liquid display, one meter, one card)

Purpose Characteristics and scope of adaptation

• The DTSY866/DSSY866 series three-phase electronic prepaid energy meters (hereinafter referred to as electric meters) comply with the GB/T17215.321-2008 and GB/T18460.3-2001 standards, and use advanced microcontroller processing systems for data acquisition, processing, and storage. Its purpose is to measure three-phase active electrical energy with a rated frequency of 50Hz or 60Hz.

• Main features: Application of computer management, purchasing electricity first and then using electricity: maximum power consumption can be limited within the rated current range (limited by the power supply department): one meter, one card, dedicated card, no power loss after card loss, and can be used after card replacement; Electric cards can transmit data bidirectionally; Can automatically power off and alert users to purchase electricity; When the battery level is zero, the power will automatically trip and cut off; And it has certain anti-theft software design, etc.

• This meter is suitable for environments with temperatures ranging from -25 ℃ to+55 ℃ and relative humidity not exceeding 85%.

Specifications, models, and technical indicators

• Specification Model

  model	accuracy class	Reference voltage Un	Rated current Ib	Access method	Instrument constant imp/kWh	wiring method
  DTSY866 DSSY866	Level 1 or Level 2	3×220/380V 3×/380V	1.5(6)	Mutual inductance type	Refer to the label and follow the actual situation.	Refer to the wiring diagram
  			3(6)	Direct type
  			5(20)	Direct type
  			10(40)	Direct type
  			10(60)	Direct type
  Note: Special specifications can be customized.

  
  

• Basic error

  current value		Power factor (COS Φ)	Basic error (%)
  Directly connect the instrument panel	Transformer instrument		one	two
  0.05Ib≤I<0.1Ib0.1ib<	0.02Ib≤I<0.05Ib0.05ib<	one	±1.5	±2.5
  0.1Ib≤I≤Imax	0.05Ib≤I≤Imax	one	±1.0	±2.0
  0.1Ib≤I<0.2Ib0.2ib<	0.05Ib≤I<0.1Ib0.1ib<	0.5 (sensory) 0.8 (capacitive)	±1.5	±2.5
  0.2Ib≤I≤Imax	0.1Ib≤I≤Imax	0.5 (sensory) 0.8 (capacitive)	±1.0	±2.0

  
  

• Unbalanced load error

  current value		Power factor (COS Φ)	Basic error (%)
  Directly connect the instrument panel	Transformer instrument		one	two
  0.1Ib≤I≤Imax	0.05Ib≤I	one	±2.0	±3.0
  0.2Ib≤I≤Imax	0.1Ib≤I	0.5 (Sensory)	±2.0	±3.0

  Note: (Ib rated current Imax maximum current)
  

  
  

• start

  Under the conditions of reference voltage, reference frequency, and COS φ=1.0, the instrument should be able to continuously measure electricity with a load current of 0.004Ib (level 1) and 0.005Ib (level 2).
  

  
  

• Stealth

  When the rated voltage of the voltage circuit is 115% and there is no current in the current circuit, the test output of the instrument should not generate more than one pulse.
  

  
  

• voltage range

  Normal operating voltage: 0.9Un-1.1Un

  Maximum operating voltage: 0.8Un-1.15Un
  

  
  

• power consumption

  Voltage line power consumption: ≤ 2W and 10VA

  Current line power consumption: ≤ 4.0VA
  

Main structure and working principle

This series of three-phase electronic prepaid energy meters is a new type of instrument manufactured using imported specialized large-scale integrated circuits, 16 bit A/D conversion, digital multipliers, digital sampling processing technology, and SMT process.

• Working Principle Diagram

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

  
  

  
  

• data processing

  The electric energy metering pulse is sent to the CPU for processing through a photoelectric coupler, and after calculation, it is stored in a non-volatile EEPROM. The information system is managed by a computer, and a certain amount of electricity and required parameters are written into the IC card input table through an IC card reader/writer. After being processed by the CPU, the microprocessor system provides display and cut-off status signals.
  

Installation and Usage

• 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.

  
  

• The electric meter should be installed vertically and not tilted in a dry and ventilated place. 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.

  
  

• Connect the wires according to the circuit diagram, tighten the wiring screws, and secure the connecting plate inside the terminal box.

  
  

• 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.

  
  

• 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 (i.e. the electricity sales office).

  
  

• Opening an account allows users to purchase electricity directly. When selling electricity, insert the power card into the power card reader and operate the computer to write encrypted parameters such as user code, pre purchased power, and area information into the power card.

  
  

• When using, insert the power card into the card holder. If it is a valid card, the meter will automatically read the data into the meter, and the meter will automatically close and power on. The screen will display the remaining power and total power consumption in the card. After using it up, the card will automatically power off when unplugged. The user should keep the power card properly. If the power card is lost, it cannot be replaced and can only be bought again to open an account. The previous power consumption data cannot be restored.

  
  

• The electric card held by the user can be used on any electric meter within the corresponding area number; An electricity meter can also allow any user's card within the corresponding area number to be inserted and used for electricity, but it is required not to be used at the same time. 4.9 When the remaining power is displayed as zero, the electricity meter automatically shuts off.

Overall dimensions

(For reference only, subject to actual conditions)

Reference diagram for functional terminal wiring

Reference diagram for power terminal wiring

(External switch type: Taking AC contactor as an example)