With the continuous development of power measurement technology, choosing the right equipment is more important than ever. Among the prominent product lines on the market, the CHINT DDSU666 and DTSU666 power meters are two models of power meters trusted by many engineers. Both are designed to accurately measure important parameters such as voltage, current, power and energy consumption, but each product offers its own unique features and advantages. This article will help you compare the DDSU666 and DTSU666 in detail, and provide detailed installation instructions to ensure optimal use. Let's explore the differences to choose the right product for your work needs!1. Introduction to DDSU666 electricity meter
Overview of DDSU666 electricity meter
• Suitable for some solar inverters to enable grid-tie load tracking and anti-reverse power generation to the grid (zero export).
• Voltage: 220/230V.
• Current: 5(80)A, class 1.
• Origin: China.
• Design: Compact, easy to install on 35mm rail, saving space in the electrical cabinet.
• Display: LCD screen.
• Measurement features: Measure active energy, measure volts, current, frequency, power and power factor.
• Connection: Supports communication, can be combined with cloud for remote viewing and data closing.
• Common applications: Used in electrical cabinets to save space and optimize power monitoring.Figure 1. DDSU666 Electricity Meter
Detailed specifications of DDSU666
Measurement | Complies with IEC60252-11 IEC62053-21 |
| Connection Type: 1P2W |
| Accuracy: Class 1.0 for operation |
Operating voltage | Nominal voltage (Un): 120V, 220V, 230V, 240V |
| Operating range: 0.7Un ~ 1.2Un |
| Power consumption: ≤1W, 5VA |
Current | CT: 1.5 (6)A |
DC: 5 (80)A |
| Frequency | 50Hz |
60Hz |
LCD screen | 7 segment LED display |
| Screen size: 5.3mm x 2.8mm |
| LED display | Number of flashes per kWh |
| Measured value | Total kWh |
| Instantaneous kW |
| Irms, Vrms, frequency, instantaneous power factor |
| Media | RS485 protocol |
Modbus và DL/T |
| Environment | Operating range limits: -40°C to +75 °C |
| Storage range limits: -40° C to +85 °C |
| Relative humidity: ≤ 95% RH |
| Protection: IP54 |
DDSU666 Electric Meter Dimensions
Figure 2. Dimensions of DDSU666Wiring diagram and pinout of DDSU666
Figure 3. DDSU666 pin diagram
Figure 4. DDSU666 pin definitions
Figure 5. DDSU666 wiring diagram and connection ports
Advantages of DDSU666
• High accuracy: Measures electricity according to international standard IEC 62053-21, ensuring level 1 accuracy.
Multi-function:
• Full display of electrical parameters: voltage, current, power, cosφ, frequency, energy consumption...
• Data storage: store 12 months of electricity consumption data by month, day, hour.
• Overload warning: set power limit, warning when exceeded.
• Support RS485 connection: transmit data to energy management system.
Modern design:
• Clear, easy-to-read LCD display.
• Compact size, easy to install.
• IP54 protection level, dust and water resistant.
2. Introduction to DTSU666 electricity meter
Overview of DTSU666 electricity meter
• Design: Electronic power meter according to DIN35 standard, easy to install on the guide rail.
• Measurement capability: Accurately measure active energy and other electronic parameters.
• Application: Analyze and evaluate energy in industrial production facilities, monitor energy in mines, apply in hotels, schools and large-scale public works.
• Management features: Support to optimize energy use and provide smart energy management solutions.
• Efficiency: Help businesses and organizations monitor and manage electricity accurately and effectively, thereby reducing costs and increasing efficiency.Figure 6. CHINT DTSU666 electricity meter
Detailed specifications of DTSU666
| Measurement | Complies with IEC60252-11 IEC62053-21 |
| Connection Type: 3P4W |
| Accuracy: Class 1.0 for operation |
| Operating voltage | Nominal Voltage (Un): 3×220/380V，3×230/400V, 3×240/415V |
| Operating range: 0.7Un ~ 1.2Un |
| Power consumption: ≤1W, 5VA |
Current | CT: 1.5 (6)A |
DC: 5 (80)A |
| Frequency | 50Hz |
60Hz |
| LCD screen | 7 segment LED display |
| Screen size: 5.3mm x 2.8mm |
| LED display | Number of flashes per kWh |
| Measured value | Total kWh |
| Instantaneous kW |
| Irms, Vrms, frequency, instantaneous power factor |
| Media | RS485 protocol |
| Modbus and DL/T 645-2007 |
| Environment | Operating range limits: -40°C to +75 °C |
| Storage range limits: -40° C to +85 °C |
| Relative humidity: ≤ 95% RH |
| Protection: IP51 |
| Dimensions | 98mm x 65mm x 72mm |
Weight | 0.4kg |
DTSU666 electric meter dimensions
Figure 7. Dimensions of DTSU666 electric meter
DTSU666 pinout and wiring diagram
Figure 8. DTSU666 pin diagram
Figure 9. Pin definition of DTSU666
Figure 10. 3-phase 4-wire wiring diagram
Figure 11. 3-phase 3-wire wiring diagram3. Compare the similarities and differences between CHINT DDSU666 and DTSU666 electric meters
Similarities
- Both can measure many electrical parameters such as voltage, current, power, power factor, energy consumption, etc.
- Both have RS485 and Modbus-RTU communication to connect to the central monitoring system.
- Both have LCD screens to visually display the electrical parameters being measured.
- Compact design, easy to install.
Difference
- Number of phases:
+ DDSU666 is a 1-phase meter, suitable for 1-phase electrical systems such as households, small shops, etc.
+ DTSU666 is a 3-phase meter, suitable for 3-phase electrical systems such as factories, industrial parks, buildings, etc.
- Maximum current:
+ DDSU666 has a maximum current of 100A, suitable for electrical systems with small and medium loads.
+ DTSU666 has a maximum current of 250A, suitable for electrical systems with large loads.
- Size and weight: DTSU666 is larger in size and weight than DDSU666 because it has 2 more measurement phases.
Choose according to your needs
- If you need a meter for a single-phase electrical system: DDSU666 is the right choice.
- If you need a meter for a three-phase electrical system: DTSU666 is the right choice.
- If you need a meter for a large-load electrical system: DTSU666 is the right choice.
- If you need a compact meter: DDSU666 is the right choice.
- In addition, you also need to consider other factors such as price, brand, warranty, etc. before making a purchase decision.4. Instructions for setting parameters for DDSU666 and DTSU666 electric meters
CHINT DDSU666 Electric Meter
Figure 12. DDSU666 main screen| Symbol | Meaning |
V | The unit of voltage, the display data of LCD screen is voltage. |
A | The unit of current, the display data of the LCD display is current. |
W | Unit of working power, LCD display data is working power. |
VAR | The unit of reactive power, the display data of LCD indicator is reactive power. |
Hz | The unit of frequency, the display data of the LCD display is frequency. |
kWh | Unit of active energy, the display data of the LCD indicator is active energy. |
Display functionsFunction of the key
- After pressing the button for a long time, the display interface will switch to the 645 protocol and Modbus protocol setting conversion interface. Short press can switch the protocol, not the address page (can only switch the ModBus protocol to the address page), the address of ModBus can be set by the button, the button can set the address range 1-247.
Figure 13. Order of access to settingsRS485 communication function
- The device uses RS485 communication mode with baud rate set to 1200, 2400 bps, 4800 bps and 9600 bps. - For the same communication circuit, it can be connected to 32 devices at the same time, with each device set as its own communication address. For communication connection, it is recommended to use twisted pair with copper mesh shielding with wire diameter not less than 0.5mm2. When arranging the wiring, the communication line should be far away from strong cables or other strong electric fields with a maximum transmission distance of 1200m. For normal network connection mode, please see the figure below, users can choose other suitable connection mode based on detailed conditions.
MODBUS access address on DDSU666Parameter
address | Parameter code | Instruction of the parameters | Type of data | Length
of data
Word | Read&write
attributes |
0000H | UCode | Programming password codE | 16-bit with
symbols | 1 | R/W |
0001H | REV. | Reserved, actual read is the
version number | 16-bit with
symbols | 1 | R |
0002H | ClrE | Electric energy zero clearing
CLr.E(1:zero clearing) | 16-bit with
symbols | 1 | R/W |
0003H | RESERVED | RESERVED | 16-bit with
symbols | 1 | |
0004H | RESERVED | RESERVED | 16-bit with
symbols | 1 | |
0005H | ChangeProtocol | Protocol changing-over | 16-bit with
symbols | 1 | R/W |
0006H | Addr | Communication address Addr | 16-bit with
symbols | 1 | R/W |
0007H | Urat | RESERVED | 16-bit with
symbols | 1 | |
0008H | Irat | RESERVED | 16-bit with
symbols | 1 | |
0009H | RESERVED | RESERVED | 16-bit with
symbols | 1 | |
000AH | RESERVED | RESERVED | 16-bit with
symbols | 1 | |
000BH | RESERVED | RESERVED | 16-bit with
symbols | 1 | |
000CH | BAud | Communication baud rate
bAud | 16-bit with
symbols | 1 | R/W |
000DH | RESERVED | RESERVED | 16-bit with
symbols | 1 | |
000EH | RESERVED | RESERVED | 16-bit with
symbols | 1 | |
000FH | RESERVED | RESERVED | 16-bit with
symbols | 1 | |
0010H | RESERVED | RESERVED | 16-bit with
symbols | 1 | |
Electric quantity of the secondary side |
2000H | U | Voltage | single precision
floating decimal | 2 | R |
2002H | I | Current | single precision
floating decimal | 2 | R |
2004H | P | Conjunction active power， the
unit is KW | single precision
floating decimal | 2 | R |
2006H | Q | Conjunction reactive power，
the unit is Kvar | single precision
floating decimal | 2 | R |
2008H | RESERVED | RESERVED | single precision
floating decimal | 2 | R |
200AH | PF | Conjunction power factor | single precision
floating decimal | 2 | R |
200CH | RESERVED | RESERVED | single precision
floating decimal | 2 | R |
200EH | Freq | Frequency | single precision
floating decimal | 2 | R |
2010H | RESERVED | RESERVED | single precision
floating decimal | 2 | R |
Electrical data of the secondary side |
4000H | Ep | Active in electricity | single precision
floating decimal | 2 | R |
MODBUS RTU connection address structureStart | Address code | Function
code | Data field | CRC check
code | End |
More than
3.5-character
dead time | 1 character | 1 character | n
characters | 2 characters | More than
3.5-character
dead time |
Read/write function codeFunction code | Definition | Operation |
03H | Read register | Read one or several register data |
10H | Write multichannel register | Write n 16-bit binary data into n continuous registers |
Error code01H | Illegal function code | The function code received is not supported by the instrument |
02H | Illegal register address | The register address received is out of the register address range |
03H | Illegal data value | The data value received is out of the corresponding address data range |
CHINT DTSU666 Electric Meter
Figure 14. Screen of DTSU666 electric meter
Meaning of the icons appearing on the screen
Figure 15. Parameters displayed on the screen
Programming function
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Figure 16. DTSU666 programming functionsExtended functions of DTSU666
Button description: “SET” button represents “confirm” or “cursor movement” (when entering digits), “ESC” button represents “exit”, “→” (“ ”) button represents “add”. Input code is (default 701).
Figure 17. Steps to access the extended menu
5. Video instructions for setting parameters for CHINT DDSU666 and DTSU666 electric meters
6. Applications of CHINT DDSU666 and DTSU666 electric meters
Electricity measurement
• Measuring total energy consumption (kWh): DDSU666 and DTSU666 can accurately measure the total amount of electricity consumed in a certain period of time, helping users to effectively monitor and manage electricity usage.
• Measure other electrical parameters: In addition to total energy consumption, these two meters can also measure other electrical parameters such as voltage, current, power, power factor, etc., providing users with detailed information about the operating status of the electrical system.
• Energy monitoring and surveillance: Thanks to the ability to continuously measure and record data, DDSU666 and DTSU666 help users effectively monitor and supervise energy usage, thereby providing appropriate electricity saving measures.
Applications in solar power systems
• Energy production measurement: DDSU666 and DTSU666 can accurately measure the amount of electricity produced by the solar power system, helping users evaluate the system's operating efficiency and optimize the power output.
• Solar power system management: These two meters can be integrated with the solar power monitoring system to effectively manage and control the system, ensure safety and optimize economic benefits.
Other applications
• Industry: DDSU666 and DTSU666 are used in factories and industrial parks to measure and monitor electricity usage for each workshop and production line, helping to save energy and improve production efficiency.
• Buildings: These two types of meters are used in office buildings and apartments to measure and allocate electricity costs for each floor and room, helping to save costs and raise users' awareness of saving electricity.
• Agriculture: DDSU666 and DTSU666 are used in livestock farms and ranches to measure and monitor electricity usage for water pumps, ventilation fans, heating systems, etc., helping to save costs and improve livestock and crop efficiency.ConclusionIn case you need to learn, need technical advice and order DDSU666 and DTSU666 Electric Meters, please contact Amazen immediately via:Hotline: 0934 399 068 - Sales: 0938 072 058
Email: amazen@amazen.com.vnWith a team of highly specialized technical support and sales consultants, our company is confident that it will bring customers the best shopping experience.
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