V-TAC VT-DTSU666 Smart Meter Instruction Manual

V-TAC VT-DTSU666 Smart Meter

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Product Information

Specifications

• WEEE Number: 80133970
• SKU: 11546
• Model: VT-DTSU666
• Multi-Language Manual QR Code: Please scan the QR code to access the manual in multiple languages.

Brief Introduction
The DTSU666 series and DSSU666 series are three-phase electronic energy meters designed for DIN-Rail mounting.

They come with the following features

• RS485 communication interface, easy to exchange data with outside
• Standard DIN35mm din rail mounting and modular design for easy installation and networking

Main application & applicable range
DTSU666 series three phase four wire and DSSU666 series three phase three wire electronic energy meter (din-rail) (hereinafter referred to as the “instrument”) is designed based on power monitoring and energy metering demands for electric power system, communication industry, construction industry, etc. as a new generation of intelligent instrument combining measurement and communication function, mainly applied into the measurement and display for the electric parameters in the electric circuit including three voltage, three current, active power, reactive power, frequency, positive& negative energy, four-quadrant energy, etc. Adopting the standard DIN35mm din rail mounting and modular design, it is characterized with small volume, easy installation and easy networking, widely applied into the internal energy monitoring and assessment for industrial and mining enterprises, hotels, schools, large public buildings.

Complied standards

• IEC 61010-1:2010《Safety requirements for electrical equipment for measurement， control and laboratory use Part1:General requirements》
• IEC 61326-1:2013 《Electrical equipment for measurement， control and laboratory use –EMC requirements Part1:General requirements》

Product Features

1. Characterized with positive and reverse active power, combined active power, combined reactive power, four quadrant reactive power metering and storage function with combination mode character can be set.
2. RS485 communication interface, easy to exchange data with outside;
3. Adopting the standard DIN35mm din rail mounting and modular design, it is characterized with small volume, easy installation and easy networking.

Product Model

product model and specification

Model| voltage
（V）| Curren（A）| Impulse constant| Accuracy class
---|---|---|---|---
imp/kWh| imp/kvarh
DTSU666| 3×230/400| 1.5(6)A| 6400| 6400| Active Class 0.5S, Reactive Class 2
5(80)A| 400| 400| Active Class 1, Reactive Class 2
DSSU666| 3×400| 1.5(6)A| 6400| 6400| Active Class 0.5S, Reactive Class 2
5(80)A| 400| 400| Active Class 1, Reactive Class 2

Note： 1.5(6)A is Connection through current transformers, 5(80)A is direct access.

Temperature Range

• Regulated working temperature range: -10°C to +45°C
• Limited working temperature range: -25°C to +75°C
• Relative humidity (Annually average): 75%
• Atmospheric pressure: 63.0kPa-106.0kPa (altitude 4km andbelow), excepting the requirements for special orders.

Working Principle

The instrument is composed of a high accurately integrated circuit specially for measurement (ASIC), managing MCU, memory chip, RS485 communication module, etc.

Working principle block diagram

Principle for the main function module
The special metering integrated circuit (ASIC) integrated six load two order ∑-? type of A/D conversion, please take the digital signal processing measured by the voltage circuit as well as all the power, energy, effective values, power factor and frequency. This metering chip can measure the active power, reactive power, apparent power, active energy, reactive power, apparent energy of each phase and combined phase, and at the same time measuring current, voltage effective values, power factor, phase angle, frequency and other parameters, entirely satisfying the needs of power meter. The chip provides an SPI interface, convenient for metering parameters as well as parameter calibration between the management MCU.

Main Technical Performance & Parameters

The metering integrated circuit (ASIC) integrated in the meter can measure active power, reactive power, apparent power, active energy, reactive power, apparent energy of each phase and combined phase. It can also measure current, voltage effective values, power factor, phase angle, frequency, and other parameters.
limit of error caused by the current augment
The limit value of the active percentage error of meters on balanced load

Meters for| Value of current| Power factor| Percentage error limits for meters of class
---|---|---|---
0.5S| Class 1| Class 2
Connection through current transformers| 0.01In≤I＜0.05In| 1| ±1.0| ±1.5| ±2.0
0.05In≤I≤Imax| 1| ±0.5| ±1.0| ±1.2
0.02In≤I＜0.1In| 0.5L、0.8C| ±1.0| ±1.5| ±2.0
0.1In≤I≤Imax| 0.5L、0.8C| ±1.0| ±1.0| ±1.2
Direct connection| 0.05Ib≤I＜0.1Ib| 1| –| ±1.5| ±2.0
---|---|---|---|---|---
0.1Ib≤I≤Imax| 1| –| ±1.0| ±1.2
0.01Ib≤I＜0.2Ib| 0.5L、0.8C| –| ±1.5| ±2.0
0.2Ib≤I≤Imax| 0.5L、0.8C| –| ±1.0| ±1.2
Note| In：secondary rated current of the current transformer; Ib：calibrated current of the meter; L:inductive；C：capacitive；

The limit value of the reactive percentage error of meters on balanced load

Value of current| sin
（inductive or capacitive ）| Percentage error limits for meters of class
---|---|---
Direct connection| Connection through current transformers| Class 2
0.05 I b £   I <  0.1 I b| 0.02 I n £   I <  0.05 I n| 1| ±2.5
0.1 I b £   I £   I max| 0.05 I n £ I £   I max| 1| ±2.0
0.1 I b £   I <  0.2 I b| 0.05 I n £   I <  0.1 I n| 0.5| ±2.5
0.2 I b £   I £   I max| 0.1 I n £   I £   I max| 0.5| ±2.0
0.2 I b £   I £   I max| 0.1 I n £   I £   I max| 0.25| ±2.5

The limit value of the reactive percentage error of meters on balanced load

The limit value of the reactive percentage error of meters on imbalanced load

±3.0

Starting and no-load condition

Starting
Under the power factor of 1.0 and started current, the instrument can be started and continuously measure (for multiple phase instrument, it will bring balanced load). If the instrument is designed based on measurement for dual directional energy, then it is applicable for each direction of energy.

start current

Test of no-load condition
When the voltage is applied with no current flowing in the current circuit, the test output of the meter shall not produce more than one pulse.
For this test, the current circuit shall be open-circuit and a voltage of 115 % of the reference voltage shall be applied to the voltage circuits.

• The minimum test period Δt shall be
• for meters of class 0.5S or 1
• for meters of class 2
• k is the number of pulses emitted by the output device of the meter per kilovarhour(imp/kvar.h); m is the number of measuring elements;
• Un is the reference voltage in volts;
• Imax is the maximum current in amperes.

Electrical parameters

Main function

Displayed function
From the displayed interface, the electrical parameter and energy data are all primary side data (that is, the multiplied by current and voltage ratios). The energy measuring value will be displayed seven bits, with the displaying range from 0.00kWh to 9999999MWh.

display
Display interface

NOTE： Combined active energy = Positive active energy – Reserve active energy。

Programming function
Programming function

When the current is connected to the line via the transformer, Ct=the rated current of the primary loop / the rated current of the secondary circuit; When the current is directly connected to the line, Ct shall be set as 1.

| 0.1～999.9| Voltage ratio, used for setting the voltage ratio of the input loop; When the voltage is connected to the line via the transformer, Pt= the rated voltage of the primary loop / the rated voltage of the secondary circuit; When the voltage is directly connected to the line, Pt shall be set as 1.0.
| 1：645;| Settings for communication stop bit and Parity bits：
| 2：n.2;
3：n.1;
4：E.1;
5：O.1;| 1：Factory mode；
2: None parity, 2 stop bits, n.2; 3: None parity, 1 stop bit, n.1; 4: Even parity, 1 stop bit, E.1;
5: Odd  parity, 1 stop bit, O.1;
---|---|---
| 0：1.200；
1：2.400；
2：4.800；
3：9.600；| Communication baud rate：
0：1.200 bps；
1：2.400 bps；
2：4.800 bps；
3：9.600 bps；
| 1～247| Communication address
| 0：n.34；
1：n.33；| Option for wiring mode:
0：n.34 represents three phase four wire; 1：n.33 represents three phase three wire.
| 0:no；1:E| The setting is 1, representing the allowed instrument energy data clearance, which will be zero reset after clearing.
| 0:P；1:Q； 2:S；| Pulse output:
0：active energy pulse; 1: reactive energy pulse; 2：Others.
| 0～30| Display in turns(second)
0：Timely display；   1～30：Time interval of actual display.
| 0～30| Backlight lighting time control （minutes）
0：Normally light； 1～30：backlight lighting time without button operation

Programming operation
Button description: “SET” button represents “confirmation”, or “cursor shift” (when input digits), “ESC” button represents “exit”, “→” (“ ”) button represents “add”. The input code is (default 701).

Setting examples for current and potential transformer ratio

Setting examples for communication address and Baud Rate
When input digits, “ ” can be used as cursor “ ”motion button; “ ”is “add” button, “ ”is Exit the programming operation interface or switch to the character interface from digit modification interface, add from the beginning after setting the digit to the maximum value.

Communication function

• Characterized with a RS485 communication interface, the baud rate can be changed between 1200bps, 2400bps, 4800bps and 9600bps. It conforms to DL/T645-2007 or ModBus-RTU protocol requirements. Factory default communication parameters is DL/T 645-2007 protocol, the default baud rate is 2400bps, with the calibration bit and stop bit to be E.1 and instrument address (please see instrument factory number or crystal display screen). Customized communication parameter is ModBus-RTU protocol, the baud rate is 9600bps, with the calibration bit and stop bit to be n.1, and the instrument address to be 1. The following table is the common ModBus protocol address table, can be asked for specified communication protocol by calling. ModBus_RTU protocol read command is 03H, write command is 10H.

ModBus protocol address table

Parameter address| Parameter code| Instructions of parameters| Data type| Data
length Word| Read Write
---|---|---|---|---|---
Keyboard parameters (specific parameters see the instructions of programming parameters, the actual value with () parameter＝ communication parameter value × 0.1）
0000H| REV.| Version No.| 16 bit with Signed char| 1| R/W
0001H| UCode| Programming code codE(1～9999)| 16 bit with| 1| R/W
0002H| ClrE| Power reset CLr.E(1:energy clear)| Signed char| 1| R/W
0003H| net| Network selection (0:three phase four wire,1:three phase three wire)| 16 bit with| 1| R/W
0006H| | Current transformer rate IrAt(1～9999)| Signed char| 1| R/W
0007H| | Voltage transformer rate UrAt（） (1～9999 represents voltage ratio 0.1～999.9)| 16 bit with| 1| R/W
000AH| Disp| Rotating display time（s）| Signed char| 1| R/W
000BH| B.LCD| Backlight time control（s）| 16 bit with| 1| R/W
000CH| Endian| Single-precision floating point size end mode (0:ABCD;1:CDAB;2:BADC;3:DCBA;)| Signed char| 1| R/W
002CH| Protocol| Protocol    switching (1:DL/T645-2007;2:n.2;5:n.1;6:E.1;7:o.1)| 16 bit with| 1| R/W
002DH| | Communication baud rate bAud (0:1200;1:2400;2:4800;3:9600;4:19200)| Signed char| 1| R/W
002EH| | Communication address Addr(1～247)| 16 bit with| 1| R/W
Electricity data on the secondary side
2000H| Uab| Three phase line voltage data, Unit V(×0.1V)| float| 2| R
2002H| Ubc| float| 2| R
2004H| Uca| float| 2| R
2006H| Ua| Three phase phase voltage data, Unit V V(×0.1V) (Invalid for three phase three phase)| float| 2| R
2008H| Ub| float| 2| R
200AH| Uc| | float| 2| R
---|---|---|---|---|---
200CH| Ia| Three phase current data, Unit A(×0.001A)| float| 2| R
200EH| Ib| float| 2| R
2010H| Ic| float| 2| R
2012H| Pt| Combined active power, Unit W(×0.1W)| float| 2| R
2014H| Pa| A phase active power, Unit W(×0.1W)| float| 2| R
2016H| Pb| B phase active power, Unit W(×0.1W) (Invalid for three phase three phase)| float| 2| R
2018H| Pc| C phase active power, Unit W(×0.1W)| float| 2| R
201AH| Qt| Combined reactive power, Unit var(×0.1var)| float| 2| R
201CH| Qa| A phase reactive power, Unit var(×0.1var)| float| 2| R
201EH| Qb| B phase reactive power, Unit var(×0.1var) (Invalid for three phase three phase)| float| 2| R
2020H| Qc| C phase reactive power, Unit var(×0.1var)| float| 2| R
202AH| PFt| Combined power factor(positive number： inductive，negative number：capacitive) (×0.001)| float| 2| R
202CH| PFa| A phase power factor(positive number：inductive， negative number：capacitive) (Invalid for three phase three phase) (×0.001)| float| 2| R
202EH| PFb| B phase power factor(positive number：inductive， negative number：capacitive) (Invalid for three phase three phase) (×0.001)| float| 2| R
2030H| PFc| C phase power factor(positive number：inductive， negative number：capacitive) (Invalid for three phase three phase) (×0.001)| float| 2| R
2044H| Freq| Frequency, Unit Hz(×0.01Hz)| float| 2| R
Power secondary side data
101EH| ImpEp| （current）positive total active energy| float| 2| R
1028H| ExpEp| （current）negative total active energy| float| 2| R
1032H| Q1Eq| （current）Total reactive energy of the first quadrant| float| 2| R
103CH| Q2Eq| （current）Total reactive energy of the second quadrant| float| 2| R
1046H| Q3Eq| （current）Total reactive energy of the third quadrant| float| 2| R
1050H| Q4Eq| （current）Total reactive energy of the fourth quadarant| float| 2| R
---|---|---|---|---|---

Note 1： When the ratio of the voltage transformer is 1, the data of read voltage transformer ratio register UrAt is 10. When the ratio of voltage transformer is 1, ignore the above table(UrAt×0.1).

• Single-precision floating point adopts standard IEEE754 format, total 32 bit(4 word). The single-precision floating point mode is assumed to be 0, ABCD(high type in the front, low byte behind).

Energy measurement function
The horizontal axis of the measurement plane represents the current vector I (fixed on the horizontal axis), and the instantaneous voltage vector is used to represent the current power transmission. Compared with the current vector I, it has phase angleφ. The counter-clockwise direction φangle is positive.

Measurement schematic diagram for energy four quadrants

Outline and installation size

able 12 Installation size

Model| modulus| Outline size (length× width× height) mm| Installation size (din rail)
---|---|---|---
DTSU666| 4| 100×72×65| DIN35 din rail
DSSU666| 4

Outline size diagram

current cable terminal (Conductor Cross-sectional Area Range ≤16 mm2 )

RS485 cable terminal (Conductor Cross-sectional Area Range 0.25-1mm2 )

Installation and operation manual

Inspection Tips
When unpacking the carton, if the shell has obvious signs caused by severe impact or falling, please contact with the supplier as soon as possible. After the instrument being removed from the packing box, it should be placed on a flat and safe plane, facing up, not overlaying for more than five layers. If not installed or used in a short time, the electric meter shall be packed and placed to the original packing box for storage.

Installation and tips
Installation and Inspection
If the model No or configuration in the original packing box is not in accordance with the requirement, please contact with the supplier. While, if the inner package or shell has been damaged after removing the instrument from the packing box, please do not install, power on the instrument, please contact with the supplier as soon as possible, instead.

Installation
It requires experienced electrician or professional personnel to install it and you must read this operation manual. During the installation, if the shell has obvious damage or marks caused by violent impact or falling, please do not install it or power on and contact with the supplier as soon as possible.

Typical wiring

• Three phase four wire: direct connect

• Three phase three wire: direct connect

• Three phase four wire: Connection through current transformers

• Three phase three wire: Connection through current transformers

RS485

Pulse output

• Voltage signal (only for connection via current transformer)

2——-UA (Phase A voltage input terminal)
8——-UC (Phase C voltage input terminal)

• Current signal

1——-IA(Phase A current input terminal)
4——-IB(Phase B current input terminal)
7——-IC*( Phase C current input terminal)

• RS485 Communication wire

24——-A（RS485 Terminal A）

• Auxiliary function

19—— Active energy and reactive energy output high terminal
21—— Active energy and reactive energy output low terminal
5 ——-UB (Phase B voltage input terminal)
10——-UN (Phase N voltage input terminal)
3——IA (Phase A current output terminal)
6——IB (Phase B current output terminal)
9——IC(Phase C current output terminal)
25——-B（RS485 Terminal B）

• Auxiliary function

19—— Active energy and reactive energy output high terminal
21—— Active energy and reactive energy output low terminal

Diagnosis, analysis and elimination for common faults

1. Incorrect wiring
2. Abnormal voltage for the instrument

|

1. If it is wrongly connected, please reconnect based on the right wiring mode (see the wiring diagram).
2.  If the supplied voltage is abnormal, please choose the specified voltage.
3. If not the above problems, please contact with the local supplier.

Abnormal RS485 communication|

1. RS485 communication cable is opened, short circuit or reversely connected.
2. Address, baud rate, data bit and check bit is not in accordance with the host computer.
3. The end of RS485 communication cable has not been matched with resistance (when the distance over than 100 meters)
4. Not matched with the communication protocol order of the host computer

|

1.  If there is any problem with the communication cable, please change it.
2.  Set the address, baud rate, data bit and check bit through buttons and confirm it is the same with the host computer, then set the operation to be “parameter settings”.
3.  If the communication distance is over than 100 meters, and the communication parameter settings are the same as the host computer, but cannot be communicated, then please lower the baud rate or add a resistance of 120Ω at the start terminal and ending

| | terminal.
---|---|---
Abnormal data for the electrical parameter (voltage, current, power, etc.)|

1. The transformer’s ratio hasn’t been set, and the instrument displays the secondary side data.
2. Wrong wiring.

|

1. If setting the transformer ratio, please set the voltage ratio and current ratio based on “parameter setting”
2. If wrongly connected, please connect the voltage and current of phase A, B and C to the wiring terminal of the instrument.

Abnormal data for the electrical parameter read by communication (voltage, current, power, etc.)|

1. Data read by communication is secondary side data, without transformer ratio.
2. Wrong analysis for data frame

|

1. Multiply the data read by communication with the voltage ratio and current ratio.
2. Analyze the data frame based on the format of the communication protocol, please pay attention to the mode of the big and small end of data.

Product Usage Instructions

Installation

1. Ensure that the power supply is turned off before starting the installation.
2. Mount the meter on a standard DIN35mm din rail.
3. Connect the necessary wiring according to the electrical diagram provided in the manual.
4. Ensure all connections are secure and properly insulated.
5. Turn on the power supply and verify that the meter is functioning correctly.

Data Exchange with External Devices
The meter is equipped with an RS485 communication interface for easy data exchange with external devices.

Follow the steps below to exchange data

1. Connect the RS485 communication interface of the meter to the corresponding interface of the external device using appropriate cables.
2. Configure the communication parameters on both the meter and the external device, ensuring they are compatible.
3. Establish a communication link between the meter and the external device.
4. Use the appropriate commands or protocols supported by both devices to exchange data.

Transportation & Storage
When transporting and unpacking the products, please confirm they are not severely impacted, transporting and storing based on Transportation, basic environmental conditions and testing methods for instrument and meters of JB/T9329-1999. The instrument and accessories shall be stored in the dry and ventilated places, to avoid humidity and corrosive gas erosion, with the limited environmental temperature for storage to be -40℃～+70℃and relative humidity not exceeding 85%.

Maintenance **

**

To ensure proper functioning and accurate measurements, follow these maintenance guidelines

• Regularly inspect the meter for any physical damage or loose connections. Repair or replace any damaged components.
• Clean the meter using a soft, dry cloth. Avoid using any abrasive materials or solvents that may damage the surface.
• Periodically calibrate the meter according to the manufacturer’s instructions to maintain accuracy.
• If you encounter any issues or abnormalities with the meter, refer to the troubleshooting section in the manual or contact customer support for assistance.

We guarantee free reparation and change for the multi-meter if found any unconformity with the standard, under circumstance of that the users fully comply with this instructions and complete seal after delivery within 18 months.
Dear clients,
Please assist us: when the product life is end, to protect our environment, please recycle the product or components, while for the materials that cannot be recycled, please also deal with it in a proper way. Really appreciate your cooperation and support.

FAQ

1. Q: How do I access the manual in multiple languages?
   A: Scan the QR code provided on the product using a QR code scanner app on your smartphone or tablet. This will give you access to the manual in multiple languages.

2. Q: Where can I reach out for support or queries related to the product?
   A: For any queries or issues with the product, please reach out to us at support@v-tac.eu. For more products range and inquiries, please contact our distributor or nearest dealers.

3. Q: What is the working temperature range of the meter?
   A: The regulated working temperature range is -10°C to +45°C, and the limited working temperature range is -25°C to +75°C.

References

• TAC.EU

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