DTZY866C/DSZY866C Three phase cost control intelligent energy meter, State Grid meter (Wired local CPU card)

Purpose Characteristics and scope of adaptation

• The DTZY866-C three-phase intelligent cost control energy meter adopts the most 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".

Specifications, models, and technical indicators

• Specification Model

  model	accuracy	Reference voltage	specification	wiring method
  DTZY866-C	one / two	3×220/380V	3X1.5(6)A、3X5(20)A、3X5(30)A、 3X5(40)A、3X5(60)A、3X10(40)A、 3X10(60)A、3X20(80)A	Refer to the wiring diagram
  Note: Special specifications can be customized.

  
  

• Basic Error (Balance Load Error Limit)

  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
  

  
  

• Data storage time

  Power failure data storage time>10 years
  

Main structure and working principle

This series of three-phase intelligent cost control electric 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 frequency proportional to the product of voltage and current through frequency conversion.

  
  

  
  

• 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 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, alarm, and cut-off status signals.
  

  
  

• Key Features:

  Prepaid function: Users can purchase electricity before using it, and power outages may occur if they owe.

  Step by step pricing function: It can be set to adopt a step by step pricing method to promote users to save electricity.

  LCD display function: Display multiple data information such as purchased electricity, remaining electricity, cumulative electricity consumption, status, etc.

  Prompt alarm function: insufficient available power and other fault information.

  Anti hoarding function: The software allows for flexible setting of recharge limits to prevent users from hoarding electricity.
  

Instructions for Use

• Table Category Description

  This series of products comes in two categories: single price and tiered price, subject to physical availability. The swipe card LCD screen displays in rotation, including "remaining", "cumulative", "year month day", "time", "user number", "current unit price", "u user number", and "c times".
  

  
  

• The process of purchasing electricity

  Before purchasing electricity, set the parameters of the electricity meter (such as alarm power) first. The user holds an IC card (i.e. "user card") to the designated electricity sales department to recharge and purchase electricity, and then inserts the recharged IC card into the electric meter (RF type needs to be placed in the card reading area) for recharging. After recharging, the electric meter will display the working status and recharge amount. After the display is complete, the IC card will be taken away and kept properly for future electricity purchases. In the future, every time you purchase electricity, insert (swipe) the meter once before recharging.

  
  

• Measurement Description

  The electricity meter charges in real-time and settles regularly based on the electricity price set by the sales department. After settlement, the current electricity consumption will be reset to zero, and the total electricity consumption will be accumulated in real-time.

Transportation, storage, and warranty period

• The table should not be subjected to severe impact during transportation and unpacking, and should be transported and stored in accordance with GB/T15464-1995 "Technical Conditions for Packaging of Instruments and Meters".

• The energy meter should be stored in its original packaging in an environment with an ambient temperature of -25 ℃ to+55 ℃, a relative humidity not exceeding 85%, and no corrosive gases in the air. When storing electric energy meters on shelves, the stacking height of the entire box should not exceed 5 boxes, and the stacking height of a single packaged electric energy meter after unpacking should not exceed 10.

• Within 18 months from the date of manufacture, if the electric meter complies with the requirements specified in this manual and is found to not meet the technical requirements with intact lead seals at the manufacturer, the manufacturer will provide free repair or replacement.

Outline drawing, functional terminal wiring reference diagram

(For reference only, subject to actual conditions)

wiring diagram

(For reference only, subject to actual conditions)

Reference diagram for power terminal wiring (external switch type: three-phase four wire with 220V AC contactor as an example)

Reference diagram for shell wiring

Reference diagram for shell two wiring