DDZY866 Single phase intelligent energy meter (Dual Circuit Campus Table)

Product Overview

• The DDZY866 single-phase cost controlled intelligent energy meter adopts advanced ultra-low power solid-state integrated circuit technology and SMT process design and manufacturing, and can be used to measure AC single-phase active energy with a voltage of 220V and a frequency of 50Hz. Its performance indicators meet the requirements of the following specifications: JJF 1245.1-2010 "General Requirements for Type Evaluation Outline of Installed Energy Meters", JJF 1245.3-2010 "Special Requirements for Type Evaluation Outline of Installed Energy Meters - Static Active Energy Meters (0.2S, 0.5S, 1 and 2 Levels)", JJG 596-2012 "Verification Regulations for Electronic Energy Meters".

Structure and other requirements

1. Specification requirements

• Standard reference frequency

  The standard value of the reference frequency is 50Hz.

• Specifications and main parameters (see Table 1):

  Table 1

  Connection method of electric energy meter	accuracy	Voltage (V)	Current (A)	Constant (imp/kWh)
  Single phase straight through	Level 1, Level 2	two hundred and twenty	5 (60), 10 (60)	one thousand and six hundred

2. Environmental conditions

• Reference temperature and relative humidity

  The reference temperature is 23 ℃, and the reference relative humidity is 45%~75%.

• Working temperature range (see Table 2):

  Table 2 Operating Temperature Range Table

  The prescribed scope of work	-25℃~+60℃
  Extreme working range	-40℃~+70℃
  Storage and transportation limit range	-40℃~+70℃

  
  

• Relative humidity at work (see Table 3):

  Table 3 Relative humidity at work

  annually average	<75%75%<
  30 days (these days are naturally distributed within a year)	95%
  Occasionally appearing on other days	85%

  
  

• atmospheric pressure

  63.0kPa~106.0kPa (altitude 4000m and below)

3. Display

• display mode

  The electric energy meter adopts LCD display information, and under normal use conditions, the service life is greater than 10 years. The LCD alternately displays the remaining power, total power consumption, (first channel) L total power consumption, (second channel) L total power consumption, and total purchased power. The basic unit for displaying the energy value is kWh, and the number of digits displayed is 8 with 2 decimal places. The electricity meter has two metering channels and records the electricity consumption of each channel and the total electricity consumption of the two channels separately.

• indicator light

  The energy meter uses high brightness, long-life LEDs as indicator lights. Two pulse 1 and pulse 2 indicator lights: red, normally off, flashing when measuring active energy. Two way trip 1 and trip 2 indicator lights: yellow, normally off, lights up when tripped, and the LCD displays the word "trip".

4. Appearance structure and installation dimension diagram

Specification: 160mm (height) × 112mm (width) × 58mm (thickness)

5. Mechanical and structural requirements

• General Requirements

  The design and structure of the electric energy meter can ensure that it does not cause any danger when used under rated conditions. Using an isolation transformer with two outputs to provide working power for the meter's internal measurement and data processing section, as well as the communication section.

• watch case

  The electric energy meter has a case that can be sealed, and only after breaking the seal can the internal components of the meter be accessed.

• packaging

  Product packaging shall be carried out in accordance with the requirements of GB/T 13384-2008 "General Technical Conditions for Packaging of Mechanical and Electrical Products".

6. Functional requirements

• Normal power consumption state: The LED pulse light flashes, and the speed of flashing is related to the user's electricity consumption. The more electricity consumption, the faster the pulse light flashes.

• Communication function: It has 485 communication function and a baud rate of 2400bps.

• Remote cost control function: The implementation of cost control function is remote. After receiving communication instructions, the energy meter can cut off or restore the user's electricity load, forcing the user to purchase electricity.

• Pulse output: The electric energy meter has the function of outputting LED pulses and electrical pulses proportional to the measured electrical energy. The characteristics of the optical test output device comply with the requirements of GB/T 17215.211-2006. The characteristics of the electrical test output device comply with the requirements of GB/T 15284-2002.

7. Electrical performance requirements

Power consumption:

• Voltage line

  At the reference voltage, reference temperature, and reference frequency, the active power and apparent power consumption of the voltage line of the electric energy meter shall not exceed 1W and 8VA, respectively; Not exceeding 3W and 12VA in communication state.

• Current line

  At the basic current, reference temperature, and reference frequency, the apparent power consumption of the current circuit of the energy meter shall not exceed 1VA.

experiment

• Accuracy requirements

  Error limit during reliability verification operation

  Under the specified reference conditions, the percentage error of the electric energy meter shall not exceed the percentage error limit specified in Table 4.

  Table 4 Percentage Error Limit

  load current	power factor	Percentage error limit of each level of instrument (%)
  Directly connected to the instrument panel	one	Level 1	Level 2
  0.05Ib≤I<0.1ib0.1ib<	one	±1.5	±2.5
  0.1Ib≤I≤Imax		±1.0	±2.0
  0.1Ib≤I<0.2ib0.2ib<	0.5L 0.8C	±1.5	±2.5
  			——
  0.2Ib≤I≤Imax		±1.0	±2.0
  			——

  
  

• start

  Under the conditions of rated voltage, rated frequency, and cos ф=1.0, when the load current rises to 0.004Ib, the energy meter will have pulse output or the indicator light representing the energy output will flash, and the starting time will not exceed the requirements of the following formula calculation results.

  Starting specified time

  

  Where:

  C - Pulse constant, imp/kWh;——Starting power, W。

  
  

• 3.3 Submersion

  Applying 115% reference voltage to the voltage circuit, there is no current in the current circuit, and no more than one pulse output will be generated within the specified time.

  
  

• 3.4 Constant of electric energy meter

  The relationship between the test output of the electric energy meter and the reading displayed is consistent with the nameplate markings.

Front/Side/Rear Dimensional Diagram of Electric Energy Meter

Dimensions: Length x Width x Thickness=160mm x 112mm x 58mm

Installation dimensions: length x width=(140mm~150mm) x 100mm

Terminal wiring diagram of electric energy meter

Direct access type

Table A-1 Definition of Wiring Terminals for Direct Access Energy Meters

Transportation and storage

• Electric energy meters should not be subjected to severe impacts during transportation and should be placed according to the labeling requirements such as "upward" and "moisture-proof" on the packaging box.

• The storage environment should be between -25 ℃ and+70 ℃, with a relative humidity not exceeding 85%, and the air should not contain corrosive gases.

• When storing electric energy meters in the warehouse, they should be placed on shelves. After unpacking, the number of stacked electric energy meters in a single package should not exceed 5 pieces. The stacking quantity of a whole box should not exceed 5 boxes.