1、 summary

DTS1791 three-phase rail type electric meterOur company uses microelectronics technology to measure electrical energy,Adopting imported specialized large-scale integrated circuits, applying digital sampling processing technology andSMTA new type of triathlon electronic energy meter developed through technological research and development. This energy meter fully complies withGB/T17215.321-2008National standards andIEC62053-21In international standards1Technical requirements for three-phase active energy meters; Capable of directly and accurately measuring positive active energy in electrical energy metering,7positionLCDThe monitor displays functional power, with good reliability, small size, light weight, beautiful appearance, advanced technology35mmDINStandard rail installation and other characteristics: It has good resistance to electromagnetic interference, low self consumption and energy saving, high precision, high overload, high stability, anti electricity theft, and long service life, RS485Communication, remote closing and opening functions (optional).

This meter is suitable for measuring rated frequencies of50Hzor60HzThree phase AC active electrical energy. For fixed installation indoors, suitable for ambient temperatures not exceeding-25~+55℃, relative humidity not exceeding95%And the air does not contain corrosive gases and should avoid the influence of dust, mold, salt spray, condensation, insects, etc.

2、Main specifications and technical parameters

2.1 Specification of electric energy meter:

Note: In the rated current column, the values before parentheses are the calibrated current valuesIbThe value in parentheses is the rated maximum current valueImax.

2.2 technical parameter

2.2.1 Error limit:

Basic error limit of electric energy meter with balanced load

Basic error limit of electric energy meter with single-phase load

2.2.2start

At rated voltage, rated frequency, andCOSUnder the condition of Φ=1, when the load current of the electric energy meter is the specified value in the table below, the electric energy meter can start and continuously measure the electric energy.

2.2.3 Stealth

When there is no current in the current circuit of the energy meter and the voltage applied to the voltage circuit is at the rated value115%The test output of the electric energy meter should not generate more than one pulse.

2.2.4 Insulation performance

The waveform that all lines of the electric energy meter can withstand between the outer shell is1.2//50μsThe peak value is6KVPulse voltage, continuous tests at different polarities10Secondly, there is no occurrence of arc discharge or breakdown. The frequency that all circuits of the electric energy meter can withstand between the case or the metal parts that can be touched outside the case is50HzThe actual sine waveform AC voltage2KVThe test lasted for one minute without breakdown.

2.2.5 Working voltage limit:70~115%Ub

2.2.6 Power consumption: ≤2Wand10VA

2.2.7 display

LCDdisplay

2.2.8 Data saving

Can be saved for 12 months, and after power failure, the data can be saved for at least 10 years.

3Installation and use

3.1 Installation precautions and methods

3.1.1 The electric energy meter can be installed and used after passing the inspection and being sealed with a lead seal before leaving the factory. Electric energy meters without lead seals or stored for too long should be re inspected by relevant departments before installation and use.

3.1.2 When taking out the electric energy meter from the original packaging box, if damage is found to the inner packaging or outer shell, do not install or power on the meter. Please contact our technical service department

3.1.3 Experienced electricians or professionals are required to install an energy meter and ensure that they have read this manual thoroughly.

3.1.4 The electric energy meter should be installed in a ventilated and dry indoor area, using35mmDINStandard rail installation, the base plate for installing the electric energy meter should be fixed on a sturdy, fire-resistant, and vibration resistant wall.

3.1.5 In places with pollution and potential damage to the structure, the energy meter should be installed in a protective cabinet.

3.1.6 When installing wiring, follow the wiring diagram on the terminal cover of the electric energy meter or the corresponding wiring diagram in this manual. It is best to adapt to the introduction of multiple copper wires to avoid abnormal operation or burning of the electric energy meter due to poor contact.

3.2 instructions

3.2.1 When using an electric energy meter in areas with frequent lightning strikes, lightning protection measures should be taken to avoid damaging the meter due to lightning strikes.

3.2.2 The load capacity of an electric energy meter is0.05 Ib~1max(Direct access type) or0.02 Ib~1maxExceeding this load capacity between (connected through transformers) will result in inaccurate measurement of the energy meter or burning of the current coil due to heating.

3.2.3 When an electric energy meter is used with a transformer, that is, an electric energy meter connected through a current transformer must multiply the reading of its electric energy by the transformer multiplier to obtain the actual electricity consumption.

3.2.4 Data display: Adopting7positionLCDDisplay or measure device.

3.2.5 Power indicator:L1,L2,L3Three of themLEDWhen the indicator light is on, it indicates that the three-phase power supply is normal; When a certain phase voltage is missing, the corresponding voltage loss indicator light will turn off.

3.2.6 Pulse indication:PULSEWhen the indicator light is on, it indicates that a power pulse has been detected (when there is a sampling signal, the pulse indicator light will light up approximately)80ms）

3.2.9LCDDisplay type, as follows:

Total energy consumptionNNNNN.NN（5+2Format, such as the image1What is the total energy consumption value45748.91KWh

chart1

3.2.12 be careful:

Please check if all programming is correct before using the electricity meter

Correctly functional wiring

1 2 3 4 5 6

pulse+pulse-Always open Normally closed Public end

5Measurement method

The electric energy meter is equipped with a photoelectric coupling type electric energy pulse test output port, located on the terminal box, which connects the testing equipment+5Vdcreceive8On the positive terminal, signal wiresreceive7Simply connect it to the negative terminal.

6、Transportation and storage

6.1 The transportation and unpacking of electric energy meters should not be subjected to severe impacts, and should be carried out according toZBY002-81According to the Basic Environmental Conditions and Test Methods for Transportation and Storage of Instruments and Meters, transportation and storage are regulated.

6.2 The electric energy meter should be stored in its original packaging box at an ambient temperature of-30~+65℃, relative humidity not exceeding95%And there should be no gas in the air that can cause corrosion, and the ambient temperature should not change dramatically.

6.3 The electric energy meter should be placed on the rack in its original packaging condition, with a stacking height of no more than five boxes. After unpacking, the stacking height of a single packaged electric energy meter should not exceed five. The electric energy meter after unpacking the inner packaging (plastic bag) should not be stored.

7、Guarantee period

This electric energy meter is from the date of manufacture12Within one month, if the user discovers that the electric energy meter does not meet the technical requirements of the above characteristics and product standards, and the remanufacturing inspection lead seal is still intact (or certified by the relevant power measurement department) and fully complies with the transportation, storage, installation, and use rules specified in this manual, and quality problems occur, the manufacturer will provide free repair or replacement.