SUNGROW DTSU666-20 Three-Phase Smart Energy Meter Installation Guide

SUNGROW DTSU666-20 Three-Phase Smart Energy Meter

Product Information

The Three-Phase Smart Energy Meter, model DTSU666-20, is aversatile device designed for monitoring and measuring energy consumption in three-phase electrical systems. It is suitable foruse in various applications, including solar switch, PV strings, hybrid inverter, load switch, and network metering. The meter features a compact design with dimensions of 118mm (width) x 72mm (height) x 65.5mm (depth) and is equipped with advancedfunctionality to ensure accurate energy measurement.

Technical Data:

• Nominal voltage: 3X57.7/100V…3X240/415V
• Input voltage range: V…3X240/415V
• Current Transformer: CT1:/0.333V, CT2:/0.333V
• Grid frequency: 50/60Hz
• Operating temperature: -20°C to +55°C
• Relative humidity: Up to 95% (non-condensing)
• Dimensions (W x H x D): 118mm x 72mm x 65.5mm

Delivery Contents:

• Three-Phase Smart Energy Meter (DTSU666-20)
• RS485 cable
• Quick installation guide

Product Usage Instructions

Installation:

1. Mount the Smart Energy Meter to a 35 mm DIN rail.
2. Hook the meter into the top edge of the rail.
3. Press down firmly until the meter snaps into place.

Note : Ensure that the meter is securely installed to prevent any potential hazards or damage.

Usage:

The Three-Phase Smart Energy Meter is designed to accurately measure and monitor energy consumption in three-phase electrical systems. Follow the steps below to use the meter:

1. Ensure that the meter is properly installed and connected to the electrical system.
2. Check the LCD display on the meter for active energy, reactive energy, and other relevant information.
3. Use the keys on the meter to navigate through menus and make selections.
4. Press the SET key to confirm selections or settings.
5. Press the ESC key to return to a previous menu or cancel settings.
6. Use the increase key to adjust setting values as required.
7. Refer to the user manual for detailed instructions on specific functions and features of the meter.

Caution : Only qualified personnel with training in theinstallation and commissioning of electrical systems should perform the work described in this document. Familiarize yourself with the country/regional standards and specifications, and strictly adhere to the instructions provided in the manual and related documents.
If you encounter any issues or require further assistance, please contact SUNGROW or the distributor for support.

Applicability

This manual is applicable to Sungrow Three-phase Smart Energy Meter.
DTSU666-20
Keep the manual in a convenient place for future reference. The latest manual can be acquired at support.sungrowpower.com.

Target Group

Only qualified personnel with the following skills are allowed to perform the work described in this document:

• Training in the installation and commissioning of the electrical systems.
• Capable of coping with the dangerous and emergency situations during the installation and commissioning.
• Familiar with the country/regional standards and specifications.
• Knowledge of and compliance with this manual and other related documents.

Intended Use

• The Smart Energy Meter is designed for indoor use only. It is a measuring device detecting the electrical values at the grid-connected point. It cannot be used for billing purposes. The data collected by the Smart Energy Meter on the PV power generation may differ from the data of the main Smart Energy Meter.
• Any use other than those described in this document does not qualify as appropriate usage and is prohibited. Do not make any modifications to the product.
• Damage or destruction may be caused to the Smart Energy Meter due to inappropriate usage. The Smart Energy Meter must not be operated beyond the values specified in the technical data.
• The following figure shows an application example of the Smart Energy Meter in the PV system. The inverter figure is for your reference only.

DANGER

Lethal voltages and danger to life due to electric shock!

• Only use the Smart Energy Meter in a dry environment and keep it away from liquids.
• Install the Smart Energy Meter in the switch cabinet only and ensure that the connection areas for the line and the neutral conductors are behind an insulating cover or have contact protection.
• Install an external disconnect switch between the Smart Energy Meter and the grid-connection point. The external disconnector must be close to the Smart Energy Meter and easily accessible.
• Disconnect the Smart Energy Meter from voltage sources before cleaning. The Smart Energy Meter must be cleaned with a dry cloth only.

Fire hazard!

If a fuse is missing or incorrect, a fire may be caused when a fault occurs. This can result in death or serious injury.

Technical Data

Delivery Contents

Related components in the scope of delivery:

• Smart Energy Meter
• RS485 cable *
• Quick installation guide

The RS485 cable is included in the accessories of the meter or the inverter.

NOTICE
Contact SUNGROW or the distributor in case of any damaged or missing components.

Three-phase Smart Energy Meter dimensions

The current transformer (CT) is shipped separately or with the inverter.

Three-phase Smart Energy Meter and its terminals

→: increase the setting value

D| A, B| Communication terminals
E| 1, 3, 4, 6, 7, 9| CT1 Current Input
F| 31, 33, 34, 36, 37, 39| CT2 Current Input
G| 91| Power supply of Rogowski coil (5V)

Installation

Mount the Smart Energy Meter to a 35 mm DIN rail. Hook it into the top edge of the rail and press down until it snaps into place.

Cable Connection

• The line conductor L1 supplies power to the Smart Energy Meter. The line conductor L1 and neutral conductor must be connected to the terminal 2 and terminal 10 of the Smart Energy Meter respectively.
• If there is only L1(to terminal 2), or L2 (to terminal 5), or L3 (to terminal 8), and the neutral conductor (to terminal 10), then the three-phase Smart Energy Meter can be used as a single-phase Smart Energy Meter.

1. Step 1 Turn off solar switch, load switch, main switch and other power switches, and secure them against connection.
2. Step 2 Take out the RS485 cable from inverter’s packaging or Smart Energy Meter’s packaging .
3. Step 3 Connect the plugs A and B to terminals A and B on the Smart Energy Meter.
4. Step 4 Strip the insulation from the power wires by 10 mm. Then connect wires to the terminals on the Smart Energy Meter, as shown below. ( Cross-section: 1mm to 6mm )
   Retrofit (Three-phase hybrid inverter + Three-phase PV inverter + Three-phase grid)

Retrofit (Three-phase hybrid inverter + Single-phase PV inverter + Three-phase grid)
Retrofit (Single-phase hybrid inverter + Single-phase PV inverter + Single- phase grid)

Note:
Connect CT1 to terminal 1 and terminal 3 of the smart energy meter, and CT2 to terminal 31 and terminal 33.

For details about the installation direction and cable connection of the current transformer, please refer to the information on the side of the current transformer.

NOTICE

• The CT direction must be consistent with the arrow direction as shown in the preceding figure.
• The maximum torque of 2, 5, 8 and 10 terminal screws is 1.7N.m, and the recommended torque is (1.0 ± 0.1) N.m; The maximum torque of 13, 14, 16, 17, 19, 21, 24 and 25 terminal screws is 0.4N.m, and the recommended torque is (0.20 ± 0.05) N.m.

Step 5 For inverter cable connection, refer to the user manual of the corresponding inverter.
Step 6 Cover the Smart Energy Meter with the insulating cover or contact protection of the sub-distribution. Switch on the power supply to the sub- distribution.

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.

• The communication address of Modbus protocol is 1 decimal data (1 ~ 254), and the factory default baud rate is 9600bps, N.8.1; E1 means even check one stop bit, O1 means odd check one stop bit, N2 means two stop bits without check, N1 means one stop bits without check.
• When RS485 communicating, the telephone sign will flashes.

Programming function

The meter parameters have been set before delivery. It can be installed directly after acception and there is no need to set parameters again.

Programming Parameter

Button description: “SET” represents “confirm” or “cursor shift” (when input digits), “ESC” represents “exit”, and “→” represents “add”. The password is 701 by default.

When input digits, “ ” can be used as cursor “ – ”motion button, “ ”is “add” button, “ ”is Exit the ESC 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.

Troubleshooting

References

• support.sungrowpower.com

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