Huawei DTSU666-H 100 A and 250 A Smart Power Sensor User Manual

About This Document

This document describes the DTSU666-H (100 A/40 mA) and DTSU666-H 250 A/50 mA Smart Power Sensor in terms of its functions, electrical properties, and structure. The DTSU666-H (100 A/40 mA) is abbreviated as DTSU666-H. Figures provided in this document are for reference only.

Intended Audience

This document is intended for:

• Sales engineers
• Technical support engineers
• Maintenance engineers

Symbol Conventions

The symbols that may be found in this document are defined as follows:

Change History

Changes between document issues are cumulative. The latest document issue contains all updates made in previous issues.

• Issue 06 (2024-05-06): Updated 2.2.2 Functions.
• Issue 05 (2021-10-10): Updated 2.3 Application Scenarios, Updated 4.4 Structure Specifications.
• Issue 04 (2021-03-01): Updated 4.4 Structure Specifications.
• Issue 03 (2019-12-10): Updated 2.5 Product Structure, Updated 4.4 Structure Specifications, Added 5 Current Transformer.
• Issue 02 (2019-08-30): Added the DTSU666-H 250 A/50 mA Smart Power Sensor.
• Issue 01 (2018-03-01): This issue is the first official release.

1 Safety Precautions

General Safety

• Follow the precautions and special safety instructions provided by Huawei when operating this product. Personnel who plan to install or maintain Huawei devices must receive a thorough training, understand all necessary safety precautions, and be able to correctly perform all operations. Huawei will not be liable for any consequences that are caused by the violation of general safety regulations and device usage safety standards.
• Before performing operations, read through this manual and follow all the precautions to prevent accidents. The "DANGER", "WARNING", "CAUTION", and "NOTICE" statements in this document do not represent all the safety instructions. They are only supplements to the safety instructions.
• Operation personnel should comply with local laws and regulations. The safety instructions in this document are only supplements to local laws and regulations.
• Do not operate the product or handle cables during thunderstorms.
• Before operating the product, remove any conductors such as jewelry or watches.
• Use insulated tools during operations.
• Follow specified procedures during installation and maintenance. Do not attempt to alter the device or deviate from the recommended installation procedures without prior consent from Huawei.
• Install the product in strict accordance with the quick guide.

Disclaimer

Huawei shall not be liable for any consequence caused by any of the following events:

• Transportation damage.
• The storage conditions do not meet the requirements specified in this document.
• Incorrect installation or use.
• Installation or use by unqualified personnel.
• Failure to obey the operation instructions and safety precautions in this document.
• Operation in extreme environments which are not covered in this document.
• The DTSU666-H or DTSU666-H 250 A/50 mA operates beyond specified ranges.
• Unauthorized modifications to the product or software code or removal of the product.
• Device damage due to force majeure (such as lightning, fire, and storm).
• The warranty expires and the warranty service is not extended.
• Installation or use in environments which are not specified in related international standards.

Personnel Requirements

Only certified electricians are allowed to install, connect cables for, maintain, troubleshoot, and replace the DTSU666-H or DTSU666-H 250 A/50 mA.

• Operation personnel should receive professional training.
• Operation personnel should read through this document and follow all the precautions.
• Operation personnel should be familiar with the safety specifications about the electrical system.
• Operation personnel should understand the composition and working principles of the grid-tied PV power system and local regulations.
• Operation personnel must wear proper personal protective equipment (PPE).

Protect Labels

Do not scrawl or damage the nameplate on the back of the DTSU666-H or DTSU666-H 250 A/50 mA because it contains important product information.

Installation

• Ensure that the DTSU666-H or DTSU666-H 250 A/50 mA is not connected to a power supply or powered on before finishing installation.
• To allow proper heat dissipation and installation, maintain appropriate clearances between the DTSU666-H or DTSU666-H 250 A/50 mA and other objects.

Electrical Connections

DANGER Before connecting cables, ensure that the DTSU666-H or DTSU666-H 250 A/50 mA is not damaged in any way. Otherwise, electric shocks or fire may occur.

• Ensure that all electrical connections comply with local electrical standards.
• Ensure that the cables used in a grid-tied PV system are properly connected and insulated and meet all specification requirements.

Operation

DANGER High voltage may cause an electric shock, which results in serious injury, death, or serious property damage from the DTSU666-H or DTSU666-H 250 A/50 mA in operation. Strictly comply with the safety precautions in this document and associated documents when operating the DTSU666-H or DTSU666-H 250 A/50 mA.

• Do not touch an energized DTSU666-H or DTSU666-H 250 A/50 mA because it may result in an electric shock.
• Follow local laws and regulations when operating the device.

Maintenance and Replacement

DANGER High voltage may cause an electric shock, which results in serious injury, death, or serious property damage from the DTSU666-H or DTSU666-H 250 A/50 mA in operation. Therefore, before maintenance, power off the DTSU666-H or DTSU666-H 250 A/50 mA and strictly comply with the safety precautions in this document and associated documents to operate the DTSU666-H or DTSU666-H 250 A/50 mA.

• Maintain the DTSU666-H or DTSU666-H 250 A/50 mA with sufficient knowledge of this document and proper tools and testing devices.
• Temporary warning signs or fences must be placed to prevent unauthorized people from entering the site.
• The DTSU666-H or DTSU666-H 250 A/50 mA can be powered on only after all faults are rectified. Failing to do so may escalate faults or damage the device.
• During the maintenance, observe ESD precautions and wear ESD gloves.

2 Overview

2.1 Product Overview

Type DTSU666-H and DTSU666-H 250 A/50 mA Smart Power Sensor (here in after referred to as the "sensor") adopts large-scaled integrated circuit with digital sampling technology, specially designed for power monitoring and energy metering demands including power system, communication industry, construction industry, mainly applied into real-time measurement and display for parameters such as three phase voltage, three phase current, active power, reactive power, frequency, positive and reverse energy, four quadrant electric energy, etc. Adopting the standard DIN35mm din rail mounting, structural module design, it is characterized with small volume, easy installation and networking, etc. As a monitoring terminal product towards energy management system, it can be widely applied into internal power assessment and monitoring of the industrial and mining enterprises, hotels, schools, large public buildings.

This performance index of the meter conforms to the following relevant technical standard:

• EN 61326-1:2013
• IEC 61326-1:2012
• EN 61326-2-1:2013
• IEC 61326-2-1:2012
• EN 61010-1:2010
• IEC 61010-1:2010
• EN 61010-2-1:2010
• IEC 61010-2-1:2010

2.2 Working Principles

2.2.1 Conceptual Diagram

The instrument is composed of highly accurate metering integrated circuit (ASIC), management MCU, storage chip, RS485 communication module, etc. The conceptual diagram is shown in Figure 2-2.

2.2.2 Functions

• Display function: The displayed interfacial electrical parameter and power data are both primary-side data (which is calculated based on the value of the current and voltage). The energy measurement value is displayed in seven bits, with the display range from 0.00kWh to 999999.9 kWh.

Figure 2-3 Liquid crystal display

IIIVEImp.Exp. TBNO.TIME

888:8.8.8.8

Table 2-1 Display (auto loop)

No.	Display Interface	Instruction	No.	Display Interface	Instruction
1		Guide des Onduleurs et Systèmes de Gestion d'Énergie Huawei Guide complet des onduleurs solaires Huawei SUN2000, appareils de communication, compteurs intelligents et solutions de gestion d'énergie, couvrant la vue d'ensemble du système, l'installation et l'utilisation de la plateforme FusionSolar.
	Huawei Smart Power Sensor Product Change Notice: DDSU666-H & DTSU666-H Discontinuation Huawei announces the discontinuation of Smart Power Sensor models DDSU666-H and DTSU666-H, introducing replacements SmartPS-100A-S0 and SmartPS-250A-T0 with enhanced capabilities. Details product changes, EOM dates, and specifications.
	DDSU666-H Smart Power Sensor User Manual User manual for the Huawei DDSU666-H Smart Power Sensor, detailing its functions, electrical properties, structure, safety precautions, and technical specifications.
	Huawei DTSU666-HW Smart Power Sensor Quick Guide This document provides a quick guide for installing and operating the Huawei DTSU666-HW Smart Power Sensor, covering dimensions, appearance, key specifications, port definitions, installation procedures, wiring scenarios, and troubleshooting.
	DTSU666-HW Smart Power Sensor Quick Guide A quick guide to the DTSU666-HW Smart Power Sensor, covering its dimensions, appearance, key specifications, port definitions, installation, wiring scenarios, display, parameter settings, and troubleshooting.
	Huawei DDSU666-H Smart Power Sensor User Manual This user manual provides comprehensive information on the Huawei DDSU666-H Smart Power Sensor, covering its purpose, intended audience, safety precautions, overview, technical specifications, and troubleshooting.
	DDSU666-H Smart Power Sensor Quick Guide A quick guide for the Huawei DDSU666-H Smart Power Sensor, covering installation, cable preparation, connecting diagram, user interface, and troubleshooting.