DDSY866 Single phase electronic prepaid energy meter (with infrared and RS-485 communication)

Overview

• The DDSY866 electronic single-phase prepaid energy meter (RS485) (hereinafter referred to as the "instrument") is a high-tech product manufactured using advanced ultra-low power large-scale integrated circuit technology and SMT process. The key components are selected from well-known brands of long-life devices, which improves the reliability and lifespan of the product.

• The electric energy meter consists of a single metering unit and a main control unit, with LCD display, infrared, and RS485 communication functions. This meter has significant advantages such as high measurement accuracy, good stability, strong overload capacity, and high reliability. Can provide advanced and reliable measurement tools for cost control and billing.

according to the standard

The electric energy meter meets or exceeds the following standards:

Main specifications and models

Basic error

• Starting current: active power ≤ 0.004Ib (1.0 level); Active power ≤ 0.005Ib (2.0 level).

• Stealth: When the voltage line is applied with 115% Un and there is no current in the current circuit, the output pulse of the energy meter shall not exceed one.

• Basic error

  current value	power factor	Percentage error limit
  		Level 1.0	Level 2.0
  0.05Ib≤I<0.1ib<>0.1ib<	one	±1.5	±2.5
  0.1Ib≤I≤Imax	one	±1.0	±2.0
  0.1Ib≤I<0.2ib<>0.2ib<	0.5 (Sensory)	±1.5	±2.5
  	0.8 (capacitive)	±1.5	--
  0.2Ib≤I≤Imax	0.5 (Sensory)	±1.0	±2.0
  	0.8 (capacitive)	±1.0	--

  Note: (Ib rated current Imax maximum current)

Main technical parameters

• Electrical parameters

  Working Voltage	0.8Un ～ 1.15Un
  Voltage line power consumption	≤2W，10VA
  Power consumption of current circuit	≤4VA

• climatic conditions

  Working temperature range:	（-25～ +60）℃
  Working limit temperature range:	（-30～ +70）℃
  Storage and transportation temperature range:	（-30～ +70）℃

working principle

• The circuit metering part adopts imported specialized metering chips, which can accurately measure active energy. The circuit mainly consists of A/D conversion, power calculation, energy accumulation, and anti creep components. It has the characteristics of high reliability, high precision, and low power consumption. The energy meter is powered by a transformer. The metering chip converts electrical energy into pulses, which are then collected and accumulated by the CPU chip. It also performs functions such as infrared meter reading, 485 meter reading, and LCD display. Far infrared communication uses 38kHz modulation, with a communication distance of no less than 5 meters. Redundant design is adopted for data security, with multiple backups to ensure the reliability of measurement data.

• The product principle diagram is as follows:

  

installation dimensions

• Dimensions: (160 × 112 × 60) mm. (Please refer to Figure 3-1)

• Installation dimensions: Three holes form an isosceles triangle, with a center to center distance of 100mm from the bottom hole and a top hole height of 140 (150) mm.

  
  

wiring diagram

install

• Strictly prohibit live installation and wiring!

• The energy meter should be installed indoors as much as possible, and a dedicated instrument box should be used for outdoor installation protection. The installation base plate should be fixed on a sturdy, fire-resistant, and vibration resistant wall surface. There should be no corrosive gases in the surrounding air when installing an electric energy meter, and dust, salt spray, etc. should be avoided.

• When using an electric energy meter, it is necessary to strictly follow the wiring diagram inside the tail cover of the meter. It is recommended to use copper wire for the leads connected to the terminal block. The screws that fix the leads inside the terminal block should be tightened to avoid burning out the electric energy meter due to poor contact and heat generation.

Transportation and Storage

• The electricity meter must be transported and stored in its original packaging condition. The product should not be subjected to severe impact during transportation and unpacking, and should be transported and stored in accordance with GB/T15464-1995 "General Technical Conditions for Packaging of Instruments and Meters". The products are stored in the warehouse and placed on shelves, with a maximum stacking height of five layers. There must be no corrosive gases in the storage environment