DDZY866-U 7P single-phase multi circuit rail type electric energy meter

Product Overview

The DDZY866-U single-phase electronic cost controlled energy meter (rail type) (hereinafter referred to as the "energy meter") 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 internationally renowned brands of long-life devices, which improves the reliability and lifespan of the product. Equipped with LCD display and RS485 communication function. This meter has significant advantages such as high measurement accuracy, good stability, strong overload capacity, and high reliability.

according to the standard

• GB/T 17215.321-2008 "Special Requirements for AC Measuring Equipment Part 21: Static Active Energy Meters (Class 1 and Class 2)"

• GB/T 17215.211-2006 "General Requirements, Tests and Test Conditions for AC Measuring Equipment Part 11: Measuring Equipment"

• JJG596-2012 "Electronic Energy Meter"

• DL/T 645-2007 "Communication Protocol for Multi functional Energy Meters"

• DL/T 830-2002 "Guidelines for the Use of Static Single phase AC Active Energy Meters"

working principle

The circuit measurement part adopts a dedicated integrated SOC measurement chip, which can accurately measure active energy. This microcontroller has strong anti-interference ability. The energy meter is powered by a transformer. The SOC metering chip converts electrical energy into pulse indicators, and the SOC built-in MCU completes power collection and accumulation. At the same time, the MCU processes functions such as 485 meter reading, LCD display, network prepayment, and load control. The product principle diagram is as follows:

Specifications and main technical parameters

1. Specifications:

2. Basic technical parameters:

(1) Basic error (not exceeding the limit range of this table):

(2) Electrical parameters

• Working voltage: 80%~115% UN (ultimate withstand voltage: 400V AC for 1 hour) Starting current:<0.4% Ib (1.0 level),<0.5% Ib (2.0 level)

• Latent movement: When the electric energy meter applies 115% of the reference voltage and there is no current in the current circuit, the test output of the electric energy meter should not generate more than one pulse within 10 times the time when the electric energy meter generates one pulse under the reference voltage and starting current.

• power waste:

  Voltage circuit: Under reference voltage, reference temperature, and reference frequency, the active power and apparent power consumption of the voltage circuit of the electric energy meter should not exceed 1W and 8VA; Under communication conditions, it should not exceed 3W and 12VA.

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

(3) Climate conditions

• Relative humidity: Annual average ≤ 75%, maximum ≤ 95%. The specified working temperature range is -25 ℃ to+60 ℃

• Extreme working temperature range: -40 ℃ to+70 ℃

• Storage and transportation temperature range: -40 ℃ to+70 ℃

Main functions

1) Measurement function

• Capable of measuring active electrical energy.

2) Communication function (optional)

• 1. It has an infrared communication interface and an RS485 communication interface, and the physical layers of the communication interfaces are independent of each other. Damage to one communication channel does not affect other channels.

• 2. The electric energy meter can transmit data to handheld terminals, data collectors, detection devices, computers, etc. through communication interfaces. The communication protocol complies with the DL/T645-2007 standard format.

• 3. RS485 communication transmission rate is 2400bps. The RS485 communication interface and the internal circuit of the energy meter achieve electrical isolation and have a fail safe circuit. The communication interface has passed electrical performance and anti-interference tests and meets the requirements of DL/T 614-2007.

3) Prepaid function (optional)

• The energy meter can be recharged with electricity through the main station system. When the remaining electricity level is higher than the alarm level by 1, the energy meter will close, otherwise it will close. The alarm power level can be set to 1 value.

4) Remote brake function (optional)

• The electric energy meter can be remotely tripped through the main station system control.

5) Automatic timing function (adjustable)

• The electric energy meter can be set with 7 built-in sets of timed power supply functions within 24 hours per week.

6) Overload opening function (can be set)

• The energy meter can set the maximum control load parameter, and when the operating power of the energy meter is set to a threshold, the energy meter will automatically trip.

7) Malignant load setting

• Malignant load: It is a major feature of this meter. Malignant load is identified using a combination of power and power factors, which can distinguish between 200 watt fast heating and 200 watt computer. A 200 watt fast heating can trip, while a 200 watt computer can be used normally. Malignant load settings can be divided into three groups, each with a power interval and a power factor interval

• Power factor: The more resistive the load, the higher the power factor. Simply put, the more heat an appliance generates, the higher the power factor. Reference: Fast heating power factor 0.97, computer 0.70. Each set of values represents a malignant load jump within the interval range

• For example, if the malicious load power is set to 100-300 and the power factor is 0.96-0.99, then using a 200 watt computer will not cause a power outage, while a 200 watt computer that heats up quickly will cause a power outage

8) Port output

• 1. The electric energy meter has the function of outputting light pulses and electric pulses proportional to the measured electrical energy.

• The characteristics of the optical pulse test output device comply with the requirements of GB/T17215.211-2006.

• 3. The electrical pulse test output is an optically isolated passive output with a pulse width of 80ms ± 20ms, and the characteristics of the output device comply with the requirements of GB/T15284-2002.

display

1. Display requirements

• The LCD cycle displays the remaining power, total power consumption, total power consumption of the first channel, total power consumption of the second channel, total purchased power, current voltage and other constantly displayed cumulative power consumption. The basic unit for displaying the energy value is kWh, and the numerical display has 6 digits and 2 decimal places.

  
  

2. Indicator light

The energy meter uses high brightness, long-life LED as the indicator light;

• Pulse indicator light:

  The first circuit: red, usually off, the first circuit measures active energy and flashes.

  Second circuit: Red, normally off, the second circuit measures active energy and flashes.

  
  

• Pull off indicator light:

  Route 1: The circuit breaker is always on when the circuit breaker is pulled, and it is off when the circuit breaker is closed.

  Route 2: The circuit breaker is always on when the circuit breaker is pulled, and it is turned off when the circuit breaker is closed.

Wiring diagram, appearance, and installation dimensions

1. Wiring diagram

2. General outline dimension diagram

Transportation and Storage

• The transportation and unpacking of electric energy meters should not be subjected to severe impact and vibration, and should be transported and stored in accordance with GB/T 15464-1995 "General Technical Conditions for Packaging of Instruments and Meters". During transportation, it should not be subjected to strong impact, handled with care, and placed according to the requirements of "upward" and "moisture-proof" on the packaging box.

• The energy meter should be stored in its original packaging, with an optimal ambient temperature of 15 ℃ to 25 ℃ and a maximum ambient temperature of -40 ℃ to+70 ℃. The relative humidity should not exceed 95%, and there should be no corrosive gases in the air.

• When storing electric energy meters on shelves, the stacking height should not exceed 6 boxes, and the stacking height of a single package after unpacking should not exceed 10.

• It is not easy to store for a long time after the inner packaging is opened.