Huawei SUN2000-28KTL User manual

SUN2000 (8KTL-28KTL)
User Manual
Issue
12
Date
2019-06-30
HUAWEI TECHNOLOGIES CO., LTD.

Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
i
Copyright © Huawei Technologies Co., Ltd. 2019. 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.
Trademarksand 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

SUN2000 (8KTL-28KTL)
User Manual
About This Document
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
ii
About This Document
Purpose
This document describes the SUN2000 inverter in terms of its installation, electrical
connections, commissioning, maintenance, and troubleshooting. Readers should be familiar
with the SUN2000 features and functions and safety precautions provided in this document
before installing and operating the SUN2000.
Store the physical documentation shipped with the product properly for future reference.
This document is subject to update and revision. The latest version can be downloaded from
http://e.huawei.com.
Intended Audience
This document is intended for photovoltaic (PV) plant operators and qualified electrical
technical personnel.
Symbol Conventions
The symbols that may be found in this document are defined as follows.
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.

SUN2000 (8KTL-28KTL)
User Manual
About This Document
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
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 the
changes made in earlier issues.
Issue 12 (2019-06-30)
Updated 4.2 Tools.
Updated 5.3 Connecting DC Input Power Cables.
Updated 7 Man-Machine Interaction.
Issue 11 (2018-05-20)
Updated 5.3 Connecting DC Input Power Cables.
Updated 8.3 Troubleshooting.
Issue 10 (2017-07-30)
Updated certain content of 5.4.1 Communications Ports.
Updated 10 Technical Specifications.
Issue 09 (2017-02-21)
Updated certain content of 4.3 Determining the Installation Position.
Updated certain content of 8.2 Routine Maintenance.
Issue 08 (2015-12-08)
Deleted descriptions about the SUN2000-24.5KTL.
Updated descriptions in 5.2 Connecting AC Output Power Cables.
Updated descriptions in 7.2.1 Viewing System Operating Information.
Added the On-grid recovery time parameter to 7.2.9 Setting Protection Parameters.
Added parameters RCD enhancing and K-factor to 7.2.10 Setting Feature Parameters.
Added 7.2.16 Resetting Alarms.
Added 7.2.17 Resetting the System.
Updated B Power Grid Codes.

SUN2000 (8KTL-28KTL)
User Manual
About This Document
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
iv
Issue 07 (2014-07-30)
Added 4.4 Support-mounting the SUN2000.
Supplemented AC power cable specifications and models.
Modified the start time of the warranty period.
Issue 06 (2014-06-05)
Added descriptions about the SUN2000-24.5KTL.
Added more precautions for Installation and Maintenance and Replacement in 1 Safety
Precautions.
Added 3 SUN2000 Storage.
Added more maintenance items to 8.2 Routine Maintenance.
Added B Power Grid Codes.
Issue 05 (2014-03-25)
Added cable types and precautions for cable connections in 5.3 Connecting DC Input Power
Cables.
Modified the output power of the inverter at different temperatures in General Data in 10
Technical Specifications.
Issue 04 (2013-11-25)
Added description about the SUN2000-23KTL.
Issue 03 (2013-10-11)
Added descriptions about the SUN2000-28KTL.
Issue 02 (2013-06-08)
This issue is the second official release.
Issue 01 (2013-04-26)
This issue is the first official release.

SUN2000 (8KTL-28KTL)
User Manual
Contents
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
v
Contents
About This Document ............................................................................................................ ii
1 Safety Precautions .................................................................................................................1
2 Overview................................................................................................................................4
2.1 Introduction...........................................................................................................................................................................4
2.2Appearance............................................................................................................................................................................6
2.3 Label Conventions................................................................................................................................................................8
2.4 Monitoring Panel ................................................................................................................................................................10
2.5 Working Principles..............................................................................................................................................................13
3 SUN2000 Storage ................................................................................................................. 17
4 Installation ........................................................................................................................... 18
4.1 Checking Before Installation..............................................................................................................................................18
4.2 Tools.....................................................................................................................................................................................20
4.3 Determining the Installation Position................................................................................................................................23
4.4 Support-mounting the SUN2000 .......................................................................................................................................26
4.5 Wall-mounting the SUN2000.............................................................................................................................................31
5 Electrical Connections......................................................................................................... 39
5.1 Connecting PGND Cables..................................................................................................................................................39
5.2 Connecting AC Output Power Cables...............................................................................................................................42
5.3 Connecting DC Input Power Cables..................................................................................................................................49
5.4 Connecting Communications Cables.................................................................................................................................56
5.4.1 Communications Ports ....................................................................................................................................................56
5.4.2 Connecting RS485 Communications Cables.................................................................................................................58
6 System Operation................................................................................................................ 62
6.1 Checking Before Power-On...............................................................................................................................................62
6.2 Powering On the SUN2000................................................................................................................................................62
6.3 Setting Initialization Parameters........................................................................................................................................63
7 Man-Machine Interaction ................................................................................................... 66
7.1 Monitoring Menu Hierarchy ..............................................................................................................................................66
7.2 Monitoring Operations .......................................................................................................................................................70
7.2.1 Viewing System Operating Information.........................................................................................................................70

SUN2000 (8KTL-28KTL)
User Manual
Contents
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
vi
7.2.2 Viewing Alarm Records ..................................................................................................................................................75
7.2.3 Setting System Time........................................................................................................................................................78
7.2.4 Setting the System Language..........................................................................................................................................80
7.2.5 Setting the Contrast .........................................................................................................................................................82
7.2.6 Setting the Currency and Currency Factor.....................................................................................................................84
7.2.7 Changing a User Password..............................................................................................................................................86
7.2.8 Setting Communications Parameters..............................................................................................................................88
7.2.9 Setting Protection Parameters.........................................................................................................................................90
7.2.10 Setting Feature Parameters............................................................................................................................................92
7.2.11 Setting Isolation Parameters..........................................................................................................................................94
7.2.12 Manually Starting and Shutting down the SUN2000..................................................................................................95
7.2.13 Restoring Factory Settings............................................................................................................................................98
7.2.14 Enabling USB Guide Functions..................................................................................................................................100
7.2.15 Cleaning the User Data ...............................................................................................................................................102
7.2.16 ResettingAlarms..........................................................................................................................................................104
7.2.17 Resetting the System ...................................................................................................................................................106
7.2.18 Viewing the System Version .......................................................................................................................................107
8 Maintenance....................................................................................................................... 109
8.1 Powering Off the SUN2000.............................................................................................................................................109
8.2 Routine Maintenance........................................................................................................................................................110
8.3 Troubleshooting ................................................................................................................................................................110
9 SUN2000 Handling............................................................................................................ 118
9.1 SUN2000 Removal...........................................................................................................................................................118
9.2 SUN2000 Packing.............................................................................................................................................................118
9.3 Disposing the SUN2000...................................................................................................................................................118
10 Technical Specifications ................................................................................................. 119
A Acronyms and Abbreviations.......................................................................................... 127
B Power Grid Codes............................................................................................................. 129

SUN2000 (8KTL-28KTL)
User Manual
1 Safety Precautions
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
1
1 Safety Precautions
Strictly follow all the safety precautions in this document to prevent personal injury or death.
Personnel Requirements
Only qualified and trained electrical technicians are allowed to operate the SUN2000.
Operators should understand the components and functioning of a grid-tied PV power
system, and they should be familiar with relevant local standards.
Label Protection
Do not tamper with any warning signs on the SUN2000 enclosure because these signs
contain important information about safe operation.
Do not remove or damage the nameplate on the SUN2000 enclosure because it contains
important product information.
Installation
Ensure that DC and AC power supplies are disconnected before operations.
Read this document before installation. Huawei shall not be liable for any consequence
caused by violation of the regulations specified in this document.
Shield the PV modules with opaque cloth before connecting cables to the SUN2000.
Ensure that the SUN2000 is not connected to a power supply and is not powered on
before starting installation.
Ensure that there are no objects within 200 mm of both sides of the SUN2000, and no
objects within 500 mm, 600 mm, and 1000 mm of the top, bottom, and front,
respectively. This is to allow sufficient space for installation and heat dissipation.
Install the SUN2000 in an environment with good ventilation to ensure efficient and
long-term system performance.

SUN2000 (8KTL-28KTL)
User Manual
1 Safety Precautions
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
2
Ensure that the SUN2000 heat sinks are free from blockage.
Do not touch any components except the wiring terminals at the bottom inside the
enclosure.
Electrical Connection
Before connecting cables to the SUN2000, ensure that the SUN2000 is securely positioned
and not damaged in any way. Otherwise, electrical shock or fire may occur.
Ensure that all electrical connections comply with local electrical standards.
Obtain approval from the local power supply department before using the SUN2000 to
generate electricity in grid-tied mode.
Ensure that the cables to the solar power system are properly connected and insulated
and meet specifications. Confirm that the insulation resistance between the ground and
the main circuit formed by the PV module strings, the SUN2000, and protective devices
is at least 1 megohm.
Operation
High voltage may cause electrical shock or death during operation. Strictly comply with the
safety precautions in this document and associated documents when operating the SUN2000.
Do not disconnect the DC power supply during the SUN2000 operation.
Do not touch parts of the SUN2000 other than the liquid crystal display (LCD) and DC
SWITCH. The SUN2000 enclosure and heat sinks are extremely hot when the
SUN2000 is in operation and touching these parts can cause severe burns and personal
injury.
Ensure that only qualified personnel are allowed to set initialization parameters during
the first power-on of the SUN2000. Incorrect settings may affect the SUN2000 operation
and cause the SUN2000 to conflict with local certifications.
Follow local laws and regulations when operating the device.
Maintenance and Replacement
Before performing maintenance tasks, power off the SUN2000 by referring to 8.1
Powering Off the SUN2000. Then wait for at least 5 minutes before performing
operations on the SUN2000.
Place temporary warning signs or erect fences to prevent unauthorized access to the
maintenance site.
Rectify any faults that may compromise the SUN2000 security performance before
restarting the SUN2000.
A faulty SUN2000 requires overall maintenance. Contact the dealer if the SUN2000 is
faulty.

SUN2000 (8KTL-28KTL)
User Manual
1 Safety Precautions
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
3
Maintain the SUN2000 with sufficient knowledge of this document and proper tools and
testing equipment.
Wear electrostatic discharge (ESD) gloves and comply with ESD protection regulations
when maintaining the SUN2000.

SUN2000 (8KTL-28KTL)
User Manual
2 Overview
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
4
2 Overview
This chapter introduces the SUN2000 and describes its functioning, appearance, label
conventions, and monitoring panel.
2.1 Introduction
This section describes the functions, models, and application of the SUN2000.
Function
The SUN2000 is a three-phase grid-tied PV string inverter. It converts DC power generated
by PV strings into AC power and then feeds the AC power into the power grid.
Models
Figure 2-1 shows how to read the SUN2000 model number, using SUN2000-17KTL as an
example.
Figure 2-1 Model number description
Table 2-1 lists all the models of the SUN2000 and their rated output power.
Table 2-1 SUN2000 models and rated output power
Model
Rated Output Power
SUN2000-8KTL
8 kW
SUN2000-10KTL
10 kW

SUN2000 (8KTL-28KTL)
User Manual
2 Overview
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
5
Model
Rated Output Power
SUN2000-12KTL
12 kW
SUN2000-15KTL
15 kW
SUN2000-17KTL
17 kW
SUN2000-20KTL
20 kW
SUN2000-23KTL
23 kW
SUN2000-28KTL
27.5 kW
Network Application
The SUN2000 applies to grid-tied PV power systems for commercial rooftops and large
power stations. A typical grid-tied PV power system consists of PV strings, grid-tied inverters,
and AC distribution units (ACDUs), as shown in Figure 2-2.
Figure 2-2 SUN2000 network application
A. PV string
B. SUN2000
C. ACDU
D. Transformer
E. Power grid
A model in the range from SUN2000-8KTLto SUN2000-23KTL can connect to the low-voltage power
grid directly without connecting to a transformer.
Power Grid Modes for the SUN2000
All SUN2000 models except the SUN2000-28KTL support the power grid modes TN-S,
TN-C, TN-C-S, and TT, as shown in Figure 2-3. The SUN2000-28KTL supports the IT mode,
as shown in Figure 2-4.

SUN2000 (8KTL-28KTL)
User Manual
2 Overview
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
6
The valid neutral-ground voltage for the TT grid mode must be less than 30 V.
The SUN2000-28KTL applies to medium-voltage and low-voltage power grids. If the
output voltage of the SUN2000 (three-phase, with a PE cable, 480 V) does not match the
power grid voltage, connect a transformer to adapt to the power grid voltage.
For example, if the SUN2000 is connected to a low-voltage power grid (three-phase, with
an N cable and a PE cable, 400 V), a transformer is required to convert the 480 V voltage to
the 400 V voltage.
Figure 2-3 Power grid modes supported by all SUN2000 models except the SUN2000-28KTL
Figure 2-4 Power grid mode supported by the SUN2000-28KTL
2.2 Appearance
This section describes the appearance and specifications of the SUN2000.

SUN2000 (8KTL-28KTL)
User Manual
2 Overview
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
7
External Dimensions
Figure 2-5 Appearance

SUN2000 (8KTL-28KTL)
User Manual
2 Overview
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
8
Bottom View
Figure 2-6 Ports
(1) DC switch
(2) Ventilation valves
(3) DC input terminals
(positive)
(4) USB port
(5) RS485 IN port
(6) RS485 OUT port
(7) AC output
terminal
(8) Protective earthing (PE)
bolt
(9) DC input terminals
(negative)
2.3 Label Conventions
This section describes the symbols on the SUN2000 and the nameplate.
Symbols
Table 2-2 describes all symbols on the SUN2000.
Table 2-2 Symbols
Symbol
Label
Meaning
Danger high voltage
The SUN2000 operates at
high voltage. All operations
on the SUN2000 may only
be carried out by a trained
electrician.

SUN2000 (8KTL-28KTL)
User Manual
2 Overview
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
9
Symbol
Label
Meaning
Delay discharge
Any residual voltage in the
SUN2000 takes 5 minutes
to fully discharge.
Burn warning
The SUN2000 must not be
touched when in operation
because its enclosure and
heat sinks are extremely
hot.
Refer to documentation
Remind operators to refer to
the documentation shipped
with the SUN2000.
Grounding
The SUN2000 must be
connected to a ground bar
for grounding purposes.
Operation warning
The DC input connector
must not be removed when
the SUN2000 is in
operation.
Nameplate
Figure 2-7 shows the SUN2000 nameplate, which contains the model information, technical
specifications, and compliance symbols.
Figure 2-7 Nameplate
(1) Trademark, product name, and model
number
(2) Technical specifications
(3) Compliance symbols
(4) Company name and country of
manufacture

SUN2000 (8KTL-28KTL)
User Manual
2 Overview
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
10
The nameplate figure is for reference only. The actual nameplate prevails.
Table 2-3 describes the compliance symbols.
Table 2-3 Compliance symbols on the nameplate
Symbol
Name
Meaning
CGC-Solar certification
mark
The SUN2000 complies
with CGC-Solar
certification standards.
Note: The
SUN2000-8KTL,
SUN2000-10KTL, and
SUN2000-12KTL do not
feature.
CE certification mark
The SUN2000 complies
with CE certification
standards.
Environmentally friendly
use period (EFUP)
The SUN2000 is
environmentally friendly
for at least 50 years.
EU WEEE mark
The SUN2000 must not be
disposed of as domestic
waste.
2.4 Monitoring Panel
This section describes the monitoring panel, including the LCD, LED indicators, buttons, and
the default screen displayed on the LCD.
Appearance
The monitoring panel has an LCD, four indicators, and four buttons, as shown in Figure 2-8.

SUN2000 (8KTL-28KTL)
User Manual
2 Overview
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
11
Figure 2-8 Monitoring panel
(1) LCD
(2) Indicators
(3) Buttons
The LCD displays SUN2000 operating data such as input power, output power, energy yield, and alarms.
The indicators show the SUN2000 operating status.
LCD
The LCD displays the SUN2000 data in graphics and text, including the operating
information, alarm information, system parameters, and user parameters.
If no button is pressed within 90s on a non-default screen, the LCD automatically displays the
default screen, which is shown in Figure 2-9.
Figure 2-9 Default page

SUN2000 (8KTL-28KTL)
User Manual
2 Overview
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
12
(1) Energy
yield
histogram
The energy yield for each hour of the current day.
(2) Energy
yield data
The current date and time.
The total energy yield for the current day from 00:00 to the current
time.
The total energy yield from the initial startup to the current time.
(3) Power
flow diagram
The number of PV string inputs.
This is represented by the row of boxes under the PV module icon.
−A box with a cross indicates a PV string that is not connected or has
low power.
−A box marked white or black indicates a PV string that is working
normally.
The power flow from the PV strings to the SUN2000 and the voltage
and current of each input.
The power flow from the SUN2000 to the power grid and the voltage
and current of each output.
−All models except the SUN2000-28KTL display the effective phase
voltage and current of the SUN2000 three-phase output.
−The SUN2000-28KTL displays the effective line voltage and
current.
NOTE
The system displays thevoltage and current from the PV string corresponding to the
box marked black and switches between the connected PV strings every 10 seconds.
Manual switching can be performed by pressing and .
(4)
Output/Peak
power
The output power and peak power of the SUN2000.
Indicators
Table 2-4 describes the four indicators on the SUN2000 monitoring panel.
Table 2-4 Indicator description
Indicator
State
Meaning
PV connection indicator
Steady green
The SUN2000 is properly
connected to at least one PV
string.
Off
The SUN2000 is disconnected
from all PV strings.
Grid-tie indicator
Steady green
The SUN2000 is properly
connected to the power grid.
Off
The SUN2000 is disconnected
from the power grid.

SUN2000 (8KTL-28KTL)
User Manual
2 Overview
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
13
Indicator
State
Meaning
Communications
indicator
Blinking green fast (on for
0.5s and then off for 0.5s
for three times at an
interval of 10s)
The SUN2000 is communicating
properly.
Off
No communication is in progress
or the communication is
abnormal.
Alarm indicator
Steady red
The SUN2000 generates a major
alarm. For details, see 7.2.2
Viewing Alarm Records.
Blinking red at short
intervals (on for 0.5s and
then off for 0.5s)
The SUN2000 generates a minor
alarm. For details, see 7.2.2
Viewing Alarm Records.
Blinking red at long
intervals (on for 1s and
then off for 4s)
The SUN2000 has generated a
warning. For details, see 7.2.2
Viewing Alarm Records.
Buttons
Table 2-5 describes the four buttons on the SUN2000 monitoring panel.
Table 2-5 Button description
Button
Name
ESC
Escape
Up
Down
Confirm
The backlight lasts for 60s after any button is pressed.
2.5 Working Principles
This section describes the circuit diagrams and working modes of the SUN2000.
Conceptual Diagrams
The SUN2000-15KTL, SUN2000-17KTL, SUN2000-20KTL, SUN2000-23KTL, and
SUN2000-28KTL receive inputs from six PV strings. The inputs are then grouped into