DTSD866/DSSD866 Three phase electronic multifunctional energy meter (Accuracy of 0.5S level)

Overview

• The DSSD866/DTSD866 three-phase electronic multifunctional energy meter is a modern and advanced instrument designed and manufactured using large-scale integrated circuits, digital sampling processing technology, and SMT technology, based on the actual power consumption of industrial users.

• The performance indicators of this meter comply with the technical requirements of GB/T 17215.323-2008 "Special Requirements for AC Measuring Equipment Part 23: Static Reactive Energy Meters (Level 2 and Level 3)", GB/T 17215.321-2008 "Special Requirements for AC Measuring Equipment Part 21: Static Active Energy Meters (Level 1 and Level 2)", GB/T 17215.301-2007 "Special Requirements for Multifunctional Energy Meters", DL/T 614-2007 "Multifunctional Energy Meters", Q/GDW 362-2009 "Technical Specification for Level 1 Three phase Cost Control Intelligent Energy Meters" and Q/GDW 363-2009 "Technical Specification for Level 1 Three phase Intelligent Energy Meters" for multifunctional energy meters. Its communication complies with the requirements of DL/T 645-2007 "Multifunctional Table Communication Protocol".

• This meter can measure active and reactive power and demand in various directions, and measure active and reactive power in phases. It has dual RS485 and modulated infrared communication, buttons, and infrared power outage wake-up meter reading functions. It has stable performance, high accuracy, and easy operation.

working principle

• An electric energy meter is composed of a measuring unit and a data processing unit. In addition to measuring active (reactive) electrical energy, it also has two or more functions such as time-sharing and measuring demand, and can display, store, and output data.

• The working principle is shown in Figure 1:

  

  Figure 1 Working principle block diagram of three-phase intelligent energy meter

  
  

  
  

• When the electric energy meter is working, the voltage and current are sampled separately by the sampling circuit and sent to the amplification circuit for buffering and amplification. Then, they are converted into digital signals by the metering chip, and the high-performance microcontroller is responsible for analyzing and processing the data. Due to the use of high-precision measurement chips, the measurement chip completes high-speed front-end sampling on its own, and the measurement algorithm is stable. The microcontroller only needs to manage and control the working status of the measurement chip. The microcontroller in the figure is also used for time-sharing billing and processing various input and output data, and completes time-sharing active and reactive energy metering and maximum demand metering functions according to pre-set time periods. It displays various data as needed, communicates and transmits through infrared or 485 interfaces, monitors operating parameters, records and stores various data.
  

technical indicators

• Accuracy level: Active power 0.2S level, 0.5S level, 1 level, reactive power 2 level

• Rated frequency: 50Hz

• Starting current: active 0.001In (0.2S level, 0.5S level); 0.002In (direct type 0.004In) (1.0 level) reactive power 0.003In (direct type 0.005In) (2.0 level)

• Stealth: with anti creep logic design

• Dimensions: 265mm × 170mm × 75mm

• Weight: Approximately 2.5kg

• Electrical parameters

  Normal operating voltage	0.8Un～1.2Un
  Extreme working voltage	0.7Un～1.3Un
  Voltage line power consumption	≤ 1.5W and 5VA (auxiliary power supply ≤ 10VA)
  Power consumption of current circuit	＜2 VA
  Clock battery voltage	3.6V
  Power outage meter reading battery voltage	3.0V

  
  

• Multiple rate work parameters

  Clock accuracy (daily error)	≤ 0.5/s/d (temperature -30 ℃~+65 ℃)
  Clock battery capacity	≥1200mAh
  Data retention time after power outage	≥ 10 years

  
  

• climatic conditions

  Normal operating temperature	-20℃～+60℃
  Extreme working temperature	-30℃～+70℃
  Storage and transportation temperature	-40℃～+70℃
  Storage and working humidity	≤85%RH

  
  

Outline drawing

Explanation of LCD display symbols

	Current running quadrant indication
	Chinese characters can indicate: 1) Current, forward and reverse active power consumption from January to December, combined active or reactive power consumption, reactive or reactive power consumption in quadrants I, II, III, and IV, maximum demand, and time of occurrence of maximum demand 2) Time and Time Period 3) Phase separated voltage, current, power, power factor 4) Record of pressure and current loss events
	Data display and corresponding unit symbols
	The upper row displays the data identifier corresponding to the wheel display/key display data, while the lower row displays the composition number of the wheel display/key display data in the corresponding data identifier. Please refer to DL/T 645-2007 for details
	From left to right: 1) ①② represents the first and second time slot schedules 2) Clock battery undervoltage indication 3) Power outage meter reading battery undervoltage indication 4) Infrared communication, if "1" is displayed simultaneously, it indicates the first 485 communication channel, and if "2" is displayed, it indicates the second 485 communication channel 5) Allow programming status indication 6) Three password verification error indication 7) Laboratory status 8) Alarm indication
	From left to right: 1) Three phase real-time voltage status indication, Ua, Ub, Uc for phase A, B, C voltage respectively. When a phase loses voltage, the corresponding character flashes; When a certain phase is disconnected, it will not be displayed. 2) Voltage reverse flow and reverse phase sequence indication. 3) Three phase real-time current status indication, Ia, Ib, Ic are for phase A, B, and C currents respectively. When a certain phase loses current, the corresponding character flashes; When the current of a certain phase is less than the starting current, it will not be displayed. When the power of a certain phase is reversed, display the "-" before the corresponding symbol
	1) Indicate the current rate status (peak to valley)

Installation and wiring of electric meters

• 1) The energy meter should be installed in a ventilated and dry indoor area to ensure safe and reliable installation and use. In areas with pollution or potential damage to the energy meter, it should be protected by a protective cabinet.

• 2) The installation size of the electric energy meter has hook screw holes on the upper part and 2 installation holes on the lower part, which are fixed with M4 × 15 screws. Fix on a sturdy, fire-resistant, and non vibrating object according to the installation dimensions shown in the following figure.

  

  Installation diagram of electric energy meter

  
  

• 4) Terminal wiring diagram

  

  Functional Terminal Wiring Diagram

  
  

  

  Power terminal wiring diagram