Huawei SUN2000-55KTL User manual

SUN2000-(55KTL, 60KTL) Series
User Manual
Issue
06
Date
2020-01-03
HUAWEI TECHNOLOGIES CO., LTD.

Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
i
Copyright © Huawei Technologies Co., Ltd. 2020. 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 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:
https://e.huawei.com

SUN2000-(55KTL, 60KTL) Series
User Manual
About This Document
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
ii
About This Document
Purpose
This document describes the SUN2000-55KTL-HV-D1, SUN2000-55KTL-IN-HV-D1,
SUN2000-55KTL-HV-D1-001, SUN2000-60KTL-HV-D1, and
SUN2000-60KTL-HV-D1-001 (SUN2000 for short) in terms of their installation, electrical
connections, commissioning, maintenance, and troubleshooting. Understand the safety
information and get familiar with the SUN2000 functions and features before installing and
operating the SUN2000.
Intended Audience
This document is intended for photovoltaic (PV) power plant personnel and qualified
electrical technicians.
Symbol Conventions
The symbols that may be found in this document are defined 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.
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.

SUN2000-(55KTL, 60KTL) Series
User Manual
About This Document
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
iii
Change History
Changes between document issues are cumulative. The latest document issue contains all
updates made in previous issues.
Issue 06 (2020-01-03)
Updated 3 Inverter Storage.
Added 6.5 Power-Off for Troubleshooting.
Issue 05 (2018-04-26)
Added description about the metal stamping forming contact.
Issue 04 (2018-01-15)
Added B Grid Codes.
Issue 03 (2017-10-30)
Updated 3 Inverter Storage.
Updated 5.2 Crimping the OT Terminal.
Issue 02 (2017-07-30)
Updated 5.3 Connecting a ground cable.
Updated 10 Technical Specifications.
Issue 01 (2017-06-15)
This issue is used for first office application (FOA).

SUN2000-(55KTL, 60KTL) Series
User Manual
Contents
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
iv
Contents
About This Document.................................................................................................................... ii
1 Safety Precautions.........................................................................................................................1
2 Overview.........................................................................................................................................4
2.1 Introduction ..................................................................................................................................................................4
2.2 Appearance ...................................................................................................................................................................5
2.3 Label Description..........................................................................................................................................................9
2.4 Working Principle....................................................................................................................................................... 11
3 Inverter Storage ...........................................................................................................................14
4 Installation....................................................................................................................................15
4.1 Checking Before Installation......................................................................................................................................15
4.2 Materials.....................................................................................................................................................................16
4.3 Determining the Installation Position .........................................................................................................................18
4.4 Installing the Mounting Bracket .................................................................................................................................22
4.5 Installing the SUN2000 ..............................................................................................................................................26
5 Electrical Connections................................................................................................................31
5.1 Precautions..................................................................................................................................................................31
5.2 Crimping the OT Terminal..........................................................................................................................................31
5.3 Connecting a ground cable .........................................................................................................................................33
5.4 Opening the Maintenance Compartment Door...........................................................................................................34
5.5 Connecting AC Output Power Cables.........................................................................................................................36
5.6 Connecting DC input power cables ............................................................................................................................41
5.7 Connecting the Communications Cable......................................................................................................................48
5.7.1 Communication Mode Description..........................................................................................................................48
5.7.2 Connecting the RS485 Communications Cable.......................................................................................................49
5.8 Closing the Maintenance Compartment Door ............................................................................................................56
6 System Commissioning .............................................................................................................58
6.1 Checking Before Power-On........................................................................................................................................58
6.2 DC Input Detection.....................................................................................................................................................58
6.3 Powering On the SUN2000 ........................................................................................................................................60
6.4 Powering Off the SUN2000........................................................................................................................................65

SUN2000-(55KTL, 60KTL) Series
User Manual
Contents
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
v
6.5 Power-Off for Troubleshooting...................................................................................................................................66
7 Man-Machine Interactions ........................................................................................................68
7.1 Operations with a USB Flash Drive............................................................................................................................68
7.1.1 Exporting Configurations ........................................................................................................................................68
7.1.2 Importing Configurations ........................................................................................................................................70
7.1.3 Exporting Data.........................................................................................................................................................71
7.1.4 Upgrading................................................................................................................................................................71
7.2 Operations with the SUN2000 App ............................................................................................................................73
7.2.1 Operations Related to the Advanced User ...............................................................................................................73
7.2.1.1 Setting Grid Parameters........................................................................................................................................74
7.2.1.2 Setting Protection Parameters...............................................................................................................................74
7.2.1.3 Setting Feature Parameters ...................................................................................................................................75
7.2.2 Operations Related to the Special User....................................................................................................................83
7.2.2.1 Setting Grid Parameters........................................................................................................................................83
7.2.2.2 Setting Protection Parameters...............................................................................................................................86
7.2.2.3 Setting Feature Parameters ...................................................................................................................................88
7.2.2.4 Setting PowerAdjustment Parameters..................................................................................................................91
8 System Maintenance ..................................................................................................................94
8.1 Routine Maintenance..................................................................................................................................................94
8.2 Troubleshooting..........................................................................................................................................................95
9 Handling the Inverter...............................................................................................................104
9.1 Removing the SUN2000...........................................................................................................................................104
9.2 Packing the SUN2000...............................................................................................................................................104
9.3 Disposing of the SUN2000.......................................................................................................................................104
10 Technical Specifications ........................................................................................................105
A Domain Name List of Management Systems.....................................................................110
B Grid Codes.................................................................................................................................111
C Acronyms and Abbreviations................................................................................................116

SUN2000-(55KTL, 60KTL) Series
User Manual
1 Safety Precautions
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
1
1 Safety Precautions
Before performing operations, read through this manual and follow all the precautions to
prevent accidents. The safety precautions provided in this document do not cover all the
safety precautions. Huawei shall not be liable for any consequence caused by the violation of
the safety operation regulations and design, production, and usage standards.
Disclaimer
Huawei shall not be liable for any consequence caused by any of the following events.
Transportation
The storage conditions do not meet the requirements specified in this document.
Violate the operation instructions and safety precautions in this document for installation,
cable connecting, and maintenance.
Operation in extreme environments which are not covered in this document
Unauthorized modifications to the product or software code
Installation or use in environments which are not specified in related international
standards
Personnel Requirements
Only certified electricians are allowed to install and operate the SUN2000.
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.
Protect Labels
Do not tamper with any warning labels on the inverter enclosure because these labels
contain important information about safe operation.

SUN2000-(55KTL, 60KTL) Series
User Manual
1 Safety Precautions
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
2
Do not tamper with the nameplate on the inverter enclosure because it contains important
product information.
Installation
Ensure that the inverter is not connected to a power supply and is not powered on before
starting installation.
Ensure that there are no objects within 200 mm, 300 mm, 500 mm, 600 mm, and 1000
mm of the left, right, top, bottom, and front of the inverter, respectively. This is to allow
sufficient space for installation and heat dissipation. For ease of installation, ensure that
the inverter bottom is at most 730 mm above the floor. If you have any questions about
the distance, consult the local technical support engineers.
Ensure that the inverter is installed in a well ventilated environment.
Ensure that the inverter heat sinks are free from blockage.
Open the maintenance compartment door of the chassis before connecting cables. Do not
perform any operation on other components inside the chassis except connecting the PE
cable, AC power cables and communications cables.
Cable Connections
Before connecting cables, ensure that the inverter is secured in position and not damaged in
any way. Otherwise, electric shocks or fire may occur.
Ensure that all electrical connections comply with local electrical standards.
Obtain approval from the local utility company before using the inverter to generate
electricity in grid-tied mode.
Ensure that the cables used in a grid-tied PV system are properly connected and insulated,
meet all specification requirements.
Operation
High voltages may cause electric shocks result in serious injury, death or serious property
damage from inverter in operation. Strictly comply with the safety precautions in this
document and associated documents when operating the inverter.
Do not touch an energized inverter because the heat sink may be over 60ºC.
Follow local laws and regulations when operating the equipment.
Maintenance and Replacement

SUN2000-(55KTL, 60KTL) Series
User Manual
1 Safety Precautions
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
3
High voltages may cause electric shocks result in serious injury, death or serious property
damage from inverter in operation. Prior to maintenance, power off the inverter and strictly
comply with the safety precautions in this document and associated documents to operate the
inverter.
Maintain the inverter with sufficient knowledge of this document and proper tools and
testing equipment.
Before performing maintenance tasks, power off the inverter and wait at least 5 minutes.
Place temporary warning signs or erect fences to prevent unauthorized access to the
maintenance site.
Rectify any faults that may compromise the inverter security performance before
powering on the inverter again.
Observe ESD precautions during the maintenance.
For personal safety, wear insulation gloves and safety shoes.

SUN2000-(55KTL, 60KTL) Series
User Manual
2 Overview
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
4
2 Overview
2.1 Introduction
Function
The SUN2000 is a three-phase grid-tied PV string inverter that converts the DC power
generated by PV strings intoAC power and feeds the power into the power grid.
Models
Figure 2-1 Model number description (SUN2000-55KTL-IN-HV-D1)
Figure 2-2 Model number description (SUN2000-60KTL-HV-D1-001)
Network Application
The SUN2000 applies to grid-tied PV systems for commercial rooftops and large plants.
Typically, a grid-tied PV system consists of PV strings, grid-tied inverters, AC power
distribution units, and step-up transformers.

SUN2000-(55KTL, 60KTL) Series
User Manual
2 Overview
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
5
Figure 2-3 Network application
(A) PV string
(B) SUN2000
(C) ACDU
(D) Step-up transformer
(E) Power grid
Supported Power Grids
The SUN2000 only supports the IT power grid mode, as shown in Figure 2-4.
Figure 2-4 Power grid modes
The SUN2000 applies to the AC power system with the neutral point grounding of the box-type
transformer. The SUN2000 itself does not connect to any neutral wire.
2.2 Appearance
SUN2000 Dimensions
Figure 2-5 shows the SUN2000 dimensions.

SUN2000-(55KTL, 60KTL) Series
User Manual
2 Overview
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
6
Figure 2-5 SUN2000 dimensions
Front view
2.2 Appearance shows the SUN2000 front view.
Figure 2-6 Front view
(1) Maintenance
compartment door
(2) LED indicator
(3) Host panel
Table 2-1 describes the LED indicators.

SUN2000-(55KTL, 60KTL) Series
User Manual
2 Overview
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
7
Table 2-1 LED indicator description (from left to right)
Indicator
Status
Meaning
PV
connection
indicator
DC input
detection
status
Blinking green
The DC input is normal.
Blinking red
DC input detection is in
progress.
Steady red
The DC input is abnormal.
PV string
connection
status
Steady green
At least one PV string is
properly connected, and the DC
input voltage of the
corresponding maximum power
point tracking (MPPT) circuit is
higher than or equal to 600 V.
Green off
The SUN2000 disconnects from
all PV strings, or the DC input
voltage of each MPPT circuit is
less than 600 V.
Grid-tied
indicator
Steady green
The SUN2000 connects to the
power grid.
Green off
The SUN2000 does not connect
to the power grid.
Communicati
ons indicator
Blinking green
The SUN2000 receives
communications data normally.
Green off
The SUN2000 receives no
communications data for 10s.
Alarm/Maint
enance
indicator
Alarm status
Blinking red at long
intervals (on for 1s and
then off for 4s)
A warning alarm is generated.
Blinking red at short
intervals (on for 0.5s
and then off for 0.5s)
A minor alarm is generated.
Steady red
A critical alarm is generated.
Local
maintenance
status
Blinking green at long
intervals (on for 1s and
then off for 1s)
Local maintenance is in
progress.
Blinking green at short
intervals (on for 0.125s
and then off for 0.125s)
Local maintenance fails.
Steady green
Local maintenance succeeds.

SUN2000-(55KTL, 60KTL) Series
User Manual
2 Overview
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
8
If both DC switches are OFF, the PV connection indicator indicates the DC input detection status. If
one or two DC switches are ON, the PV connection indicator indicates the PV string connection
status.
Local maintenance refers to operations performed after a USB flash drive, Bluetooth module,
WLAN module or USB data cable is inserted into the USB port of the SUN2000. For example, local
maintenance includes configuration import and export using a USB flash drive, and maintenance
operations on the SUN2000 app installed on a device connected to the SUN2000 by a Bluetooth
module, WLAN module or USB data cable.
If an alarm occurs during local maintenance, the Alarm/Maintenance LED shows the local
maintenance status first. After the USB flash drive, Bluetooth module, WLAN module or USB data
cable is removed, the LED shows the alarm status.
Bottom View
Figure 2-7 shows the SUN2000 bottom view.
Figure 2-7 Bottom view
No.
Component
Silk Screen
1
Waterproof cable connector (inner
diameter: 37–44 mm)
AC OUTPUT
2
Waterproof cable connector (inner
diameter: 10–15 mm)
RESERVE
3
USB port
USB
4
DC switch 1
DC SWITCH 1
5
DC switch 2
DC SWITCH 2
6
Waterproof cable connector (inner
diameter: 14–18 mm)
COM1, COM2, COM3
7
DC input terminal (controlled by
DC SWITCH 1)
+/–
8
DC input terminal (controlled by
DC SWITCH 2)
+/–

SUN2000-(55KTL, 60KTL) Series
User Manual
2 Overview
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
9
Waterproof cable connector is abbreviated as waterproof connector in the following text.
2.3 Label Description
Symbols
Table 2-2 describes the labels on the SUN2000 chassis and their meanings.
Table 2-2 Label description
Symbol
Name
Meaning
Running warning
Potential hazards exist after the
SUN2000 is powered on. Take
protective measures when
operating the SUN2000.
Burn warning
Do not touch a running SUN2000
because it generates high
temperatures on the shell.
Delay discharge
High voltage exists after the
SUN2000 is powered on. Only
qualified and trained electrical
technicians are allowed to
perform operations on the
SUN2000.
Residual voltage exists after
the SUN2000 is powered off.
It takes 5 minutes for the
SUN2000 to discharge to the
safe voltage.
Refer to
documentation
Remind operators to refer to the
documents shipped with the
SUN2000.
Grounding
Indicates the position for
connecting the protection ground
cable.
Operation
warning
Do not remove the DC input
connector when the SUN2000 is
running.

SUN2000-(55KTL, 60KTL) Series
User Manual
2 Overview
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
10
Symbol
Name
Meaning
DC terminal
operation
warninga
High voltage exists after the
SUN2000 is powered on. To
avoid electric shocks, perform the
following system power-off
operations before plugging or
unplugging DC input connectors
of the SUN2000:
1. Send a shutdown command.
2. Turn off the downstream AC
switch.
3. Turn off the two DC switches
at the bottom.
SUN2000 serial
number label
Indicates the SUN2000 serial
number.
Weight label
The SUN2000 needs to be carried
by more than one person or using
a pallet truck.
Note a: Fittings delivered with the SUN2000 contain the label of DC terminal operation
warning. You are advised to attach the label at the bottom of the SUN2000 front side, as
shown in Figure 2-8. You can also select an appropriate place for attaching the label based
on site requirements.
Figure 2-8 Place for attaching

SUN2000-(55KTL, 60KTL) Series
User Manual
2 Overview
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
11
Nameplate
The SUN2000 is labeled with a nameplate on the side that contains the model information,
technical specifications, and compliance symbols, as shown in 2.3 Label Description (which
uses SUN2000-55KTL-HV-D1 as an example).
Figure 2-9 Nameplate
(1) Trademark and product model
(2) Important technical specifications
(3) Compliance symbols
(4) Company name and country of
manufacture
The certification marks on the nameplate will be subject to the actual product.
2.4 Working Principle
Conceptual Diagram
The SUN2000 receives inputs from eight PV strings. Then the inputs are grouped into four
MPPT routes inside the SUN2000 to track the maximum power point of the PV strings. The
DC power is then converted into three-phase AC power through an inverter circuit. Surge

SUN2000-(55KTL, 60KTL) Series
User Manual
2 Overview
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
12
protection is supported on both the DC and AC sides. Figure 2-10 shows the SUN2000
conceptual diagram.
Figure 2-10 SUN2000 conceptual diagram
Working Modes
The SUN2000 can work in standby, operating, or shutdown mode. Figure 2-11 shows the
relationship between the three working modes.
Figure 2-11 SUN2000 working modes

SUN2000-(55KTL, 60KTL) Series
User Manual
2 Overview
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
13
Table 2-3 describes the three working modes shown in Figure 2-11.
Table 2-3 Working mode description
Working
Mode
Description
Standby
The SUN2000 enters the standby mode when the external environment does
not meet the requirements for starting the SUN2000. In standby mode:
The SUN2000 continuously performs self-check and enters the operating
mode once the operating requirements are met.
If the SUN2000 enters the shutdown mode after detecting a shutdown
command or a fault after startup.
Operating
In operating mode:
The SUN2000 converts DC power from PV strings into AC power and
feeds the power to the power grid.
The SUN2000 tracks the maximum power point to maximize the PV
string output.
The SUN2000 enters the shutdown mode after detecting a fault or a
shutdown command, and enters the standby mode after detecting that the
PV string output power does not meet the requirements for grid-tied
electricity generation.
Shutdown
In standby or operating mode, the SUN2000 enters the shutdown mode
after detecting a fault or shutdown command.
In shutdown mode, the SUN2000 enters the standby mode after detecting
a startup command or that a fault is rectified.

SUN2000-(55KTL, 60KTL) Series
User Manual
3 Inverter Storage
Issue 06 (2020-01-03)
Copyright © Huawei Technologies Co., Ltd.
14
3 Inverter Storage
The following requirements should be met if the SUN2000 is not put into use directly:
Do not remove the packing materials, and check the packing materials regularly
(recommended: every three months). If any rodent bites are found, replace the packing
materials immediately. If the solar inverter is unpacked but not put into use immediately,
put it inside the original package with the desiccant bag, and seal it using tape.
Keep the storage temperature at –40°C to +70°C and the humidity at 5%–95% RH. The
air must not contain corrosive or flammable gases.
The solar inverter should be stored in a clean and dry place and be protected from dust
and water vapor corrosion. The solar inverter must be protected against rain and water.
A maximum of five inverters can be stacked.
Do not tilt the package or place it upside down.
Periodic inspections are required during the storage. If any rodent bites are found,
replace the packing materials immediately.
If the solar inverter has been stored for more than two years, it must be checked and
tested by professionals before being put into use.