DDS1791Single phase electronic energy meter adopts the United StatesADIThe company's single-phase energy metering chipADE7755And advancedSMTA new type of instrument designed and manufactured based on the actual power consumption of users using wave soldering technology. All technical indicators of this instrument comply withGB/T17215.321-2008Static AC Active Energy Meter andIEC62053-21The requirements of international standards.

2、 Function and Features

1It has the function of bidirectional measurement of active energy,LCD display or meter displays the total power level;

2Equipped with infrared communication andRS-485 communication interface (optional), which allows for remote and convenient meter reading and switching management of electric energy meters;

3Can set or retrieve parameters such as total power consumption, instrument constant, meter address, meter password, etc;

4The CPU chip has a watchdog system inside, making data more secure and reliable,Long term storage of power outage data (continuous power outages can be stored for more than 10 years);

5Isolated power sources, namelyCPU、 The metering part and RS485 interface provide reliable working power supply.

6Communication protocol

According to the Multi function watt hour meter communication protocol》DL/T 645-2007 is the standard for the electric power industry in the People's Republic of China.

3、 Specifications and main technical parameters

1. Model specifications

2. Basic error limit

Note:IbCalibrate the current,Imax maximum current.

3. Start up

At reference voltage, reference frequency, andUnder the condition of COS φ=1.0, the load current is0.004Ib(Level 1) or0.00The 5Ib (level 2) instrument should be able to continuously measure electricity.

4. Stealth

Voltage circuit with rated voltage addedAt 115%, when there is no current in the current circuit, the test output of the instrument should not generate more than one pulse within the specified time.

5. Voltage range

Normal operating voltage:0.9Un-1.1Un

Maximum operating voltage:0-1.15Un

6. Power consumption

Voltage line≤2W and 10VA

Current line≤0.6VA

7. Climatic conditions

Normal operating temperature:-10℃ +45℃

Extreme working temperature:-25℃ +55℃

Storage and transportation temperature:-25℃ +70℃

8. Weight: 0.8kg

9External dimensions:168mm×108 mm×58 mm