Huawei DTSU666-HW/YD Series

Questions and Answers

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merritttraceyAug 7, 2025
Why is my Huawei Security Sensor metering inaccurately?
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  christopher23Aug 7, 2025
  Inaccurate metering in your Huawei Security Sensor can stem from a couple of issues. First, the cable connections may be incorrect, so verify that the phase sequence of voltage and current is correct, referring to the wiring diagrams. Second, the high and low ends of the current transformer inlet might be reversely connected. If the values Pa, Pb, and Pc are negative, you should change the cable connection for the current transformer to ensure correct connection.
C
Carlos DavisAug 17, 2025
What to do if my Huawei Security Sensors have no display after power-on?
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  Janice ArellanoAug 17, 2025
  If your Huawei Security Sensor shows no display after powering on, the issue might be related to the cable connection or the voltage supply. Ensure the cables are correctly connected according to the wiring diagrams. Also, check that the voltage supplied matches the specifications required for the sensor.
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Diane McguireAug 27, 2025
How to fix abnormal RS485 communication in Huawei Security Sensors?
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  Shelia DixonAug 27, 2025
  Abnormal RS485 communication in Huawei Security Sensors can be due to several reasons: * The RS485 communication cable might be disconnected, short-circuited, or reversely connected. If the cable is faulty, replace it. * The communication address, baud rate, data bit, and parity bit of the meter may not match those of the inverter. Correct this by setting these parameters to match those of the inverter using the buttons on the device.

Summary

1 Overview

1.1 Dimensions

Provides dimensional information and tolerances for the DTSU666-HW Smart Power Sensor.

1.2 Appearance

Details the specifications and nameplate information of the DTSU666-HW Smart Power Sensor.

2 Installing the DTSU666-HW

3.1 Preparing Cables

Details the types, ports, conductor sizes, and sources for various cables used with the DTSU666-HW.

3 Installing Cables

3.2 Wiring Scenarios

Describes different wiring scenarios based on current and line voltage, including connection modes and wiring modes.

3.3 Direct Connection: SmartLogger Networking

Wiring diagrams for SmartLogger networking in three-phase connections for direct current and voltage.

3.3 Direct Connection: Smart Dongle Networking

Wiring diagrams for Smart Dongle networking in three-phase connections for direct current and voltage.

3.4 CT Connection: SmartLogger Networking

Wiring diagrams for SmartLogger networking using current transformers for high currents.

3.4 CT Connection: Smart Dongle Networking

Wiring diagrams for Smart Dongle networking using current transformers for high currents.

3.5 CT and PT Connection (Voltage > 500 V)

Wiring diagrams for three-phase connections using CTs and PTs for line voltage over 500 V.

4 Display and Parameter Settings

4.1 Display

Details the various display items and their corresponding values shown on the DTSU666-HW meter.

4.2 Parameter Settings

Explains the parameters, their value ranges, and descriptions for configuring the DTSU666-HW meter.

4.3 Parameter Setting Operations

Provides step-by-step instructions for setting wiring mode, ratios, and communication parameters.

5 Troubleshooting

Troubleshooting Symptoms and Methods

Lists common issues like no display or abnormal communication and their corresponding cause analysis and solutions.

6 Installation Verification

Installation Verification Checks

Checks for secure mounting brackets, tightened screws, and reliable cable connections without short circuits.

7 Customer Service Contact

Customer Service Contact Information

Provides contact email and telephone numbers for customer service across different geographical regions.