1.summary

DTS1791、DSS1791The three-phase electronic energy meter adopts imported specialized large-scale integrated circuits,16positionA/DConversion, digital multiplier, application of digital sampling processing technology andSMTProcess, a new type of instrument designed and manufactured based on the actual electricity consumption of industrial users. This meter uses an independent three unit metering module to accurately measure the active energy of three-phase forward and reverse directions. Measurement errors have excellent long-term stability.Its performance meets the technical requirements of GB/T17215-2002 standard for three-phase energy meters.

Main features: It has good resistance to electromagnetic interference, low self consumption, high precision, anti electricity theft, wide range, long life, and can display liquid level.

This meter is suitable for an ambient temperature of -10~50℃, relative humidity not exceeding 85%.

2.Function and Features

1It has the function of bidirectional measurement of active energy, and the LCD display shows the total amount of electricity;

2HavingRS-485And infrared communication, which can remotely and conveniently read the total power of the energy meter;

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

4Equipped with a programming switch, it can be programmed online;

5The chip has a watchdog system inside, making data more secure and reliable, and power outage data can be stored for a long time (continuous power outages can be stored for more than 10 years);

6Isolated power sources, namelyCPUMeasurement section andRS485The interface provides reliable working power supply.

7It has a phase failure indication function.

8Communication protocol

According to the Communication Protocol for Multi functional Energy MetersMulti-function watt-hour meter communication protocol》DL/T 645—1997The standards of the power industry in the People's Republic of China shall be implemented.

3.working principle

DTS6607、 The working principle of DSS6607 three-phase static electric energy meter is shown in Figure 1.

This electric energy meter adopts a three-phase power supply mode and can work normally under any single-phase power supply situation.

When the electric energy meter is working, the voltage and current are sampled separately by the sampling circuit and sent to the large-scale dedicated integrated circuit for buffering and amplification. Then, they are converted into digital signals by a 16 bit A/D converter, processed by a digital multiplier, and sent to the CPU for processing. Finally, the CPU sends the processed data to the display section, step counter, and other output units as needed.

4.Specifications, models, and technical indicators

4.1Specification and model

4.2Basic Error (Balance Load Error Limit)

Note: (Ib rated current Imax maximum current)

4.3start

Under the conditions of reference voltage, reference frequency, and COS φ=1.0, the instrument should be able to continuously measure electricity with a load current of 0.001Ib (0.5 level) and 0.002Ib (1 level).

4.4Stealth

When the rated voltage of the voltage circuit is 115% and there is no current in the current circuit, the test output of the instrument should not generate more than one pulse.

4.5Voltage range

Normal operating voltage: 0.9Un-1.1Un

Maximum operating voltage: 0.8Un-1.15Un

4.6power waste

Voltage line power consumption: ≤ 2W and 5VA

Current line power consumption: ≤ 1VA

4.7Climatic conditions

Normal operating temperature: -10 ℃+45 ℃ Extreme operating temperature: -20 ℃+55 ℃

Storage and transportation temperature: -25 ℃+70 ℃. The humidity can reach 95% for 30 days of the year (naturally diffused), and sometimes up to 85% for the rest of the time.

4.8Mechanical dimensions

Dimensions: 228mm × 144mm × 72mm

4.9Weight:About 1.2kg