Huawei DDSU666-H User manual

DDSU666-H Smart Power Sensor
User Manual
Issue 02
Date 2021-03-01
HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2021. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and
the customer. All or part of the products, services and features described in this document may not be
within the purchase scope or the usage scope. Unless otherwise specied in the contract, all statements,
information, and recommendations in this document are provided "AS IS" without warranties, guarantees
or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every eort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address: Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website: https://e.huawei.com
Issue 02 (2021-03-01) Copyright © Huawei Technologies Co., Ltd. i

About This Document
Purpose
This document describes the DDSU666-H Smart Power Sensor in terms of its
functions, electrical properties, and structure.
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 dened as follows.
Symbol Description
Indicates a hazard with a high level of risk which,
if not avoided, will result in death or serious
injury.
Indicates a hazard with a medium level of risk
which, if not avoided, could result in death or
serious injury.
Indicates a hazard with a low level of risk which,
if not avoided, could result in minor or moderate
injury.
DDSU666-H Smart Power Sensor
User Manual About This Document
Issue 02 (2021-03-01) Copyright © Huawei Technologies Co., Ltd. ii

Symbol Description
Indicates a potentially hazardous situation which,
if not avoided, could result in equipment damage,
data loss, performance deterioration, or
unanticipated results.
NOTICE is used to address practices not related to
personal injury.
Supplements the important information in the
main text.
NOTE is used to address information not related
to personal injury, equipment damage, and
environment deterioration.
Change History
Changes between document issues are cumulative. The latest document issue
contains all updates made in previous issues.
Issue 02 (2021-03-01)
● Updated 2.6 Installing the DDSU666-H.
● Updated 2.7 Installing the DDSU666-H Cable.
Issue 01 (2018-03-01)
This issue is the rst ocial release.
DDSU666-H Smart Power Sensor
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Issue 02 (2021-03-01) Copyright © Huawei Technologies Co., Ltd. iii

Contents
About This Document................................................................................................................ ii
1 Safety Precautions...................................................................................................................1
2 Overview....................................................................................................................................4
2.1 Product Overview.................................................................................................................................................................... 4
2.2 Working Principles.................................................................................................................................................................. 5
2.3 Application Scenarios............................................................................................................................................................. 8
2.4 Model Naming Conventions................................................................................................................................................ 9
2.5 Product Structure.....................................................................................................................................................................9
2.6 Installing the DDSU666-H................................................................................................................................................. 10
2.7 Installing the DDSU666-H Cable..................................................................................................................................... 10
3 System Maintenance............................................................................................................ 12
3.1 Troubleshooting..................................................................................................................................................................... 12
4 Technical Specications....................................................................................................... 14
4.1 Environmental Specications............................................................................................................................................ 14
4.2 Main technical performance and parameter.............................................................................................................. 14
4.2.1 Electrical parameter..........................................................................................................................................................14
4.2.2 Percentage error................................................................................................................................................................ 15
4.2.3 Start........................................................................................................................................................................................15
4.2.4 Deuction............................................................................................................................................................................. 15
4.2.5 Other technical parameters........................................................................................................................................... 16
4.3 EMC Specications............................................................................................................................................................... 16
4.4 Structure Specications...................................................................................................................................................... 16
4.4.1 Structure specications....................................................................................................................................................16
5 Acronyms and Abbreviations B.......................................................................................... 17
DDSU666-H Smart Power Sensor
User Manual Contents
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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.
● Bolts should be tightened with a torque wrench and marked using red or blue
color. Installation personnel should mark tightened bolts in blue. Quality
inspection personnel should conrm if the bolts are tightened and then mark
them in red. If screws or bolts used to secure the device are not tightened to
the required torque, the device may fall from the mounting bracket.
● Follow specied procedures during installation and maintenance. Do not
attempt to alter the device or deviate from the recommended installation
procedures without prior consent from the manufacturer.
● 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
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● The storage conditions do not meet the requirements specied in this
document.
● Incorrect installation or use
● Installation or use by unqualied 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 DDSU666-H operates beyond specied ranges.
● Unauthorized modications to the product or software code or removal of the
product
● Device damage due to force majeure (such as lightning, re, and storm)
● The warranty expires and the warranty service is not extended
● Installation or use in environments which are not specied in related
international standards
Personnel Requirements
Only certied electricians are allowed to install, connect cables for, maintain,
troubleshoot, and replace the DDSU666-H.
● 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 specications 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 any warning labels on the DDSU666-H because
these labels contain important information about safe operation.
● Do not scrawl or damage the nameplate on the back of the DDSU666-H
because it contains important product information.
Installation
● Ensure that the DDSU666-H is not connected to a power supply or powered
on before nishing installation.
● To allow proper heat dissipation and installation, maintain appropriate
clearances between the DDSU666-H and other objects.
Electrical Connections
D ANGER
Before connecting cables, ensure that the DDSU666-H is not damaged in any way.
Otherwise, electric shocks or re may occur.
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● 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 specication requirements.
Operation
D ANGER
High voltage may cause an electric shock, which results in serious injury, death, or
serious property damage from the DDSU666-H in operation. Strictly comply with
the safety precautions in this document and associated documents when
operating the DDSU666-H.
● Do not touch an energized DDSU666-H because it has a high temperature.
● Follow local laws and regulations when operating the device.
Maintenance and Replacement
D ANGER
High voltage may cause an electric shock, which results in serious injury, death, or
serious property damage from the DDSU666-H in operation. Therefore, before
maintenance, power o the DDSU666-H and strictly comply with the safety
precautions in this document and associated documents to operate the DDSU666-
H.
● Maintain the DDSU666-H with sucient 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 DDSU666-H can be powered on only after all faults are rectied. Failing
to do so may escalate faults or damage the device.
● During the maintenance, observe ESD precautions and wear ESD gloves.
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User Manual 1 Safety Precautions
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2 Overview
2.1 Product Overview
Type DDSU666-H Smart Power Sensor (hereinafter referred to as the " Sensor ") is
specially designed for the distributed photovoltaic system, to be a new Smart
power sensor, combined with measurement and communication, mainly applied
into the measurement for electrical quantity including voltage, current,
power ,frequency, power factor, active energy etc. in the electrical circuit. It can
realize networking with the external device through RS485 communication
interface. Adopting the standard DIN35mm din rail mounting, structural module
design, it is characterized with small volume, easy installation and networking, etc.
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
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Figure 2-1 DDSU666-H
2.2 Working Principles
Conceptual Diagram
The Sensor can convert the voltage and current signal to be the signal that can be
identied by MCU through the sampling circuit, MCU will calculate and convert it
into energy, power, power factor and other electrical quantity by calculating the
signals in the sampling circuit, transferring to users through communication and
meanwhile save the data in the storage circuit. Please see the conceptual diagram
of the Sensor as gure 2-2:
Figure 2-2 2-2Conceptual diagram
Functions
● Metering function:
Accurately metering the positive/ reverse active energy and combined active
energy, no storage data loss for the sensor after power interruption.
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