Huawei DDSU666-H User Manual

DDSU666-H Smart Power Sensor

User Manual

Issue

01

Date

2018-05-18

HUAWEI TECHNOLOGIES CO., LTD.

Issue 01 (2018-05-18)

Huawei Proprietary and Confidential

i

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 specified 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 effort 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:

http://e.huawei.com

DDSU666-H Smart Power Sensor User Manual

About This Document

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Purpose

Symbol

Description

Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

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.

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:

About This Document



Sales engineers



Technical support engineers



Maintenance engineers

Symbol Conventions

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

DDSU666-H Smart Power Sensor User Manual

About This Document

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iii

Symbol

Description

Calls attention to important information, best practices and tips.

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 01 (2018-05-18)

This issue is the first official release.

DDSU666-H Smart Power Sensor User Manual

1 Safety Precautions

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General Safety

1 Safety Precautions



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 confirm 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 specified 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



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

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1 Safety Precautions

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

Operation in extreme environments which are not covered in this document



The DDSU666-H 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 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 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 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 finishing installation.



To allow proper heat dissipation and installation, maintain appropriate clearances between the DDSU666-H and other objects.

Electrical Connections

Before connecting cables, ensure that the DDSU666-H 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.

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1 Safety Precautions

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Operation

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

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 off 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 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 DDSU666-H 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.

DDSU666-H Smart Power Sensor User Manual

2 Overview

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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.

2 Overview

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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2 Overview

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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 identified 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 Figure 2-2 Conceptual diagram.

DDSU666-H Smart Power Sensor User Manual

2 Overview

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Functions

No.

Content

Description

Figure 2-2 Conceptual diagram



Metering function: Accurately metering the positive/ reverse active energy and combined active energy, no

storage data loss for the sensor after power interruption.



Measurement function of electrical parameters The sensor can accurately measure electrical parameters including power, voltage,

current, frequency, power factor, etc.



Display function

The instrument adopts field LCD design, characterized with display function for electrical parameters and energy data. Please see LCD display in Figure 2-3 Liquid crystal display.

The display bit of energy measurement value can be six bits, with display range from 0 to 999999kWh.

Figure 2-3 Liquid crystal display



Cyclic display

Characterized with cyclic display function, the shift time of cyclic display is 5s. Please see the cyclic displayed item in Table 2-1 Cyclic displayed items.

Table 2-1 Cyclic displayed items

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2 Overview

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No.

Content

Description

1 Current positive active energy Imp = 1.20kWh

2 Current reverse active energy Exp = 1.00kWh

3 Active power P=1.100kW

4 Voltage U U=220.0V

5 Current I=5.000A

6 Frequency F=50.00Hz

No.

Content

Description

1 Current combined active energy =0.20kWh

2 Current positive active energy Imp = 1.20kWh

3 Current reverse active energy Exp = 1.00kWh

4

n.1. data format to be eight bits, none parity bit and one stop bit.

9600: baud rate to be 9600bps 4800: baud rate to be 4800bps

5 Comm.Add=11

6 Voltage U=220.0V



Button display

The instrument has button display and backlight function, please see button displayed items in Table 2-2 Button displayed items.

Table 2-2 Button displayed items

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No.

Content

Description

7 Current I=5.000A

8 Active power P=1.100kW 9 Power factor Ft=1.000

10 Frequency F=50.00Hz

1.

Backlight closed without button operation for sixty seconds.

2.

The combined active energy default by the factory is equal to positive active energy.



Parameter setting function The sensor can set the communication address and baud rate through buttons. Setting method please see Figure 2-4: Long press the button 3s, the sensor will automatically

enter into the communication address setting interface, with cyclic display for setting display interface of baud rate and communication address. Please press the button when required for baud rate or communication address settings, it will exit to communication address and baud rate settings without button operation for twenty seconds.

The details are as follows:

Figure 2-4 Communication address and baud rate setting diagrammatic sketch



Communication function The sensor is equipped with one RS485 communication interface, with baud rate changed

among 4800bps and 9600bps. The default baud rate is 9600bps with check bit and stop bit to be n.1, communication address (see factory number or LCD display), support ModBus-RTU protocol.

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For the definition of ModBus-RTU interface, please see article 2.1 of General signal definition table (Float) of Modbus interface definition and description of Huawei Smart Power Sensor with word version of V100, issued on January 29th, 2018.

2.3 Application Scenarios

Scenario 1: The sensor is used to realize power restriction of the power grid with charge and discharge control towards energy storage in the household inverter scheme, which is the core component for household energy management. It adopts RS485 communication, which can realize the electrical quantity measurement, energy metering function and in respond to the upper host for the real-time data query.

Figure 2-5 Application Scenario

2.4 Model Naming Conventions

Figure 2-6 Model naming conventions

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2 Overview

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Table 2-3 Model Specification

Model No.

Accuracy grade

Reference d voltage

Current specification

Collector constant

Type

DDSU666H

Active Class 1

230 V

100 A/40 mA

800 imp/kWh

Via transformer

2.5 Product Structure

Outline dimension: 36mm x 98mm x 66mm; Din-rail mounting dimension: 35mm, for the outline and installation dimension, please see Figure 2-7 as below.

Figure 2-7 Product dimensions

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3 System Maintenance

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3.1 Troubleshooting

Fault phenomenon

Factor analysis

Elimination method

No display after the instrument being powered on

1. Incorrect wiring mode;

2. Abnormal voltage

supplied for the instrument;

1. If the wiring mode is

incorrect, please connect based on the correct wiring mode (see the wiring diagram).

2. If the supplied voltage is

abnormal, please supply the voltage on the instrument specification.

Abnormal RS485 communication

1. The RS485

communication cable is disconnected, short circuit or reversely connected.

2. The address, baud rate,

data bit and parity bit of the instrument is not in accordance with the host computer;

1. If any problems for the

communication cable, please reconnect or change the cable.

2. Set the address, baud

rate, data bit, parity bit to be the same as the host computer through buttons, for button settings, please see “parameter setting”.

Table 3-1 Common alarms and troubleshooting measures

3 System Maintenance

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Fault phenomenon

Factor analysis

Elimination method

Inaccurate for energy metering

1. Incorrect wiring, please

check whether the corresponding phase sequence of voltage and current is correct.

2. Check whether the high

& low end of current transformer inlet is reversely connected. Please observe the power of Pa, Pb, Pc, to be abnormal if any negative values.

If the wiring mode is incorrect, please connect based on the correct wiring mode (see the wiring diagram).

Contact the installation vendor if all failure analysis procedures listed above are completed and the fault still exists.

DDSU666-H Smart Power Sensor User Manual

A Technical Specifications

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A Technical Specifications

Item

Specifications

Regulated working temperature range

-25ºC to +60ºC

Limited working temperature range

-35ºC to +70ºC

Relative humidity (Annual average)

≤ 75% RH Atmospheric pressure

86-106 kPa

Regulated working voltage range

176-288 VAC

Extended working voltage range

0.7-1.3 Un

Working frequency range

45-65 Hz

Current value

Power factor

The percentage error limitation of various grade instruments

Direct connect

Via transformer

Class 1

A.1 Environmental Specifications

A.2 Main technical performance and parameter

A.2.1 Electrical parameter

A.2.2 Percentage error

The percentage error of the sensor cannot exceed the following corresponding limited value.

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A Technical Specifications

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Current value

Power factor

The percentage error limitation of various grade instruments

Direct connect

Via transformer

Class 1

0.05Ⅰb ≤ Ⅰ <

0.1Ⅰb

0.02Ⅰn ≤ Ⅰ <

0.05Ⅰn

1

±1.5

0.1Ⅰb ≤ Ⅰ ≤ Ⅰmax

0.05Ⅰn ≤ Ⅰ ≤ Ⅰmax

1

±1.0

0.1Ⅰb ≤ Ⅰ <

0.2Ⅰb

0.05Ⅰn ≤ Ⅰ <

0.1Ⅰn

0.5L

±1.5

0.8C

±1.5

0.2Ⅰb ≤ Ⅰ ≤ Ⅰmax

0.1Ⅰn ≤ Ⅰ ≤ Ⅰmax

0.5L

±1.0

0.8C

±1.0

When users has special requirement

0.25L

±3.5

0.2Ⅰb ≤ Ⅰ ≤ Ⅰmax

0.1Ⅰn ≤ Ⅰ ≤ Ⅰmax

0.5C

±2.5

Sensor Energy meter grade

Power factor Class 1

Direct connect

0.004Ib

1 Via transformer

0.002Ib

Scale range

0-999999.99 kWh

Communication protocol

Modbus-RTU protocol

A.2.3 Start

Under the referenced voltage and Table A-1, the sensor starts and continuously metering the electrical energy.

A.2.4 Defluction

The sensor shall have good anti-creeping logic, when the voltage loop is added with 1.15 times of referenced voltage, when the current loop is disconnected, the energy meter will not produce more than one pulse.

A.2.5 Other technical parameters

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A Technical Specifications

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A.3 EMC Specifications

Item

Specifications

Installation mode

Directly stuck the sensor on the din rail and finally install it on the power distribution box.

1) When installing, please firstly stuck one side of the card slot and then forcibly stuck it on the din rail.

2) When disassembling, please use a screwdriver to forcibly hold the flexible card and then take out the sensor.

Dimensions (H x W x D)

36 mm x 100 mm x 65.5 mm (±0.5 mm)

Weight

≤ 0.3 kg

EMC performance of the meter conforms to the following relevant technical standard: IEC 61326-1:2012, IEC 61326-2-1:2012 EN 61326-1:2013, EN 61326-2-1:2013 EN61000-3-2:2005/A2:2009, EN61000-3-3:2008

A.4 Structure Specifications

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A.5 Wiring terminal instruction

DDSU666-H Smart Power Sensor User Manual

B Acronyms and Abbreviations B

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B Acronyms and Abbreviations B

D DC

direct current

E

EFT

electrical fast transient

EMI

electromagnetic interference

EMS

electromagnetic susceptibility

ESD

electrostatic discharge

M

MPPT

maximum power point tracking

P

PLC

power line communication

R RE

radiated emission

RS

radiated susceptibility

Huawei DDSU666-H User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

About This Document

Contents

1 Safety Precautions

2 Overview

2.1 Product Overview

2.2 Working Principles

2.3 Application Scenarios

2.4 Model Naming Conventions

2.5 Product Structure

3 System Maintenance

3.1 Troubleshooting

A Technical Specifications

A.1 Environmental Specifications

A.2 Main technical performance and parameter

A.2.1 Electrical parameter

A.2.2 Percentage error

A.2.3 Start

A.2.4 Defluction

A.2.5 Other technical parameters

A.3 EMC Specifications

A.4 Structure Specifications

A.5 Wiring terminal instruction

B Acronyms and Abbreviations B