DDZY866C-Z Single phase cost control intelligent energy meter (State Grid RS-485 Communication Local CPU Card Carrier Communication)

Overview

• The DDZY866C-Z single-phase local (carrier) cost controlled intelligent energy meter (hereinafter referred to as the "instrument") adopts advanced ultra-low power large-scale integrated circuit technology and SMT process manufacturing high-tech products. The key components are selected from internationally renowned 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 rate unit, with LCD display, infrared, and RS485 communication functions. In terms of cost control function, strict security authentication through ESAM module is adopted to ensure the safety and reliability of data transmission. This meter has significant advantages such as high measurement accuracy, good stability, strong overload capacity, and high reliability. It can provide advanced and reliable measurement tools for single-phase cost control 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 ≤ 0.005Ib (level 2).

• 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 2)
  0.05Ib	one	±2.5
  0.1Ib～Imax	one	±2.0
  0.1Ib	0.5 (sensory), 0.8 (capacitive)	±2.5
  0.2Ib～Imax	0.5 (sensory), 0.8 (capacitive)	±2.0

Main technical parameters

• Electrical parameters

  Working Voltage	0.8Un ～ 1.15Un
  Voltage line power consumption	≤1.5W，10VA
  Power consumption of current circuit	≤1VA（Ib）
  Backup battery voltage	3.6VDC，≥1.2Ah

• climatic conditions

  Working temperature range:	（-25～ +60）℃
  Working limit temperature range:	（-40～ +70）℃
  Storage and transportation temperature range:	（-40～ +70）℃

• Clock accuracy

  Clock accuracy (23 ℃)	≤±0.5s/d
  Clock accuracy (-25 ℃~+60 ℃)	≤±1s/d

• Safety performance: AC insulation voltage test: The test voltage is 4kV, which meets the requirements of GB/T17215.321-2008. Impulse voltage test: The impulse voltage is 6 kV, which has passed the EMC test and meets the requirements of GB/T17215.321-2008.

• The meter remained undamaged for 4 hours under the condition of 1.9Un and continued to operate normally under the condition of 6Ib.

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. The clock is built-in with a temperature compensation chip, ensuring that the daily clock error is less than 0.5S/d at nominal temperature and the monthly error does not exceed 25 seconds. 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 × 71) mm. (For reference only)

• 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

(Based on the actual wiring diagram)

• Connect the wires correctly according to the wiring diagram on the back of the terminal box. The typical reference wiring diagram is as follows:

  Direct phenotype 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 present in the storage environment.