Huawei SUN2000-55KTL-HV-D1 User manual

SUN2000-(55KTL, 60KTL) Series
User Manual
Issue
02
Date
2017-07-30
HUAWEI TECHNOLOGIES CO., LTD.

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Copyright © Huawei Technologies Co., Ltd. 2017. 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:
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SUN2000-(55KTL, 60KTL) Series
User Manual
About This Document
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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 an imminently hazardous situation which, if not
avoided, will result in serious injury or death.
Indicates a potentially hazardous situation which, if not
avoided, could result in serious injury or death.
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.
Calls attention to important information, best practices and
tips.
NOTE is used to address information not related to personal

SUN2000-(55KTL, 60KTL) Series
User Manual
About This Document
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Symbol
Description
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 (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
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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.......................................................................................................................................................12
3 Inverter Storage ...........................................................................................................................15
4 Installation....................................................................................................................................16
4.1 Checking Before Installation......................................................................................................................................16
4.2 Materials.....................................................................................................................................................................17
4.3 Determining the Installation Position .........................................................................................................................18
4.4 Installing the Mounting Bracket .................................................................................................................................23
4.5 Installing the SUN2000 ..............................................................................................................................................27
5 Electrical Connections................................................................................................................31
5.1 Precautions..................................................................................................................................................................31
5.2 Crimping the OT Terminal..........................................................................................................................................31
5.3 Connecting a ground cable .........................................................................................................................................32
5.4 Opening the Maintenance Compartment Door...........................................................................................................33
5.5 Connecting AC Output Power Cables.........................................................................................................................35
5.6 Connecting DC Input Power Cables...........................................................................................................................39
5.7 Connecting the Communications Cable......................................................................................................................45
5.7.1 Communication Mode Description..........................................................................................................................45
5.7.2 Connecting the RS485 Communications Cable.......................................................................................................46
5.8 Closing the Maintenance Compartment Door ............................................................................................................54
6 System Commissioning .............................................................................................................56
6.1 Checking Before Power-On........................................................................................................................................56
6.2 DC Input Detection.....................................................................................................................................................56
6.3 Powering On the SUN2000 ........................................................................................................................................58
6.4 Powering Off the SUN2000........................................................................................................................................64

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7 Man-Machine Interactions ........................................................................................................65
7.1 Operations with a USB Flash Drive............................................................................................................................65
7.1.1 Exporting Configurations ........................................................................................................................................65
7.1.2 Importing Configurations ........................................................................................................................................67
7.1.3 Exporting Data.........................................................................................................................................................68
7.1.4 Upgrading................................................................................................................................................................69
7.2 Operations with the SUN2000 App ............................................................................................................................70
7.2.1 Operations Related to the Advanced User ...............................................................................................................71
7.2.1.1 Setting Grid Parameters........................................................................................................................................71
7.2.1.2 Setting Protection Parameters...............................................................................................................................72
7.2.1.3 Setting Feature Parameters ...................................................................................................................................72
7.2.2 Operations Related to the Special User....................................................................................................................80
7.2.2.1 Setting Grid Parameters........................................................................................................................................80
7.2.2.2 Setting Protection Parameters...............................................................................................................................83
7.2.2.3 Setting Feature Parameters ...................................................................................................................................86
7.2.2.4 Setting PowerAdjustment Parameters..................................................................................................................89
8 System Maintenance ..................................................................................................................92
8.1 Routine Maintenance..................................................................................................................................................92
8.2 Troubleshooting..........................................................................................................................................................93
9 Handling the Inverter...............................................................................................................101
9.1 Removing the SUN2000...........................................................................................................................................101
9.2 Packing the SUN2000...............................................................................................................................................101
9.3 Disposing of the SUN2000.......................................................................................................................................101
10 Technical Specifications ........................................................................................................102
A Acronyms and Abbreviations................................................................................................106

SUN2000-(55KTL, 60KTL) Series
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1 Safety Precautions
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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.

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Protect Labels
Do not tamper with any warning labels on the inverter enclosure because these labels
contain important information about safe operation.
Do not tamper with the nameplate on the inverter enclosure because it contains important
product information.
Do not remove the warranty label from the inverter enclosure. Otherwise, product
warranty will be voided.
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.

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Maintenance and Replacement
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.

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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.

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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 is mainly used for medium-voltage power grids. It delivers three-phase, three-wire output,
which is then fed to a medium-voltage power grid through a step-up transformer.
2.2 Appearance
SUN2000 Dimensions
Figure 2-5 shows the SUN2000 dimensions.

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Figure 2-5 SUN2000 dimensions
Front view
Figure 2-6 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.

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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.
Communications
indicator
Blinking green
The SUN2000 receives data
over RS485/PLC
communication.
Green off
The SUN2000 has not
received data over RS485/PLC
communication for 10
seconds.
Alarm/Maintenanc
e 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
Local maintenance fails.

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Indicator
Status
Meaning
(on for 0.125s
and then off for
0.125s)
Steady green
Local maintenance succeeds.
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 universal serial bus (USB) flash drive,
Bluetooth module, or USB data cable is inserted into the USB port of the SUN2000. For example,
local maintenance includes data import and export using a USB flash drive and connecting to the
SUN2000 APP over a Bluetooth module or USB data cable.
If alarming and local maintenance happen concurrently, the alarm/maintenance indicator shows the
local maintenance state first. After the USB flash drive, Bluetooth module, or USB data cable is
removed, the indicator shows the alarm state.
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

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No.
Component
Silk Screen
7
DC input terminal (controlled by DC
SWITCH 1)
+/–
8
DC input terminal (controlled by DC
SWITCH 2)
+/–
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.

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Symbol
Name
Meaning
Grounding
Indicates the position for
connecting the protection
ground cable.
Operation warning
Do not remove the DC
input connector when the
SUN2000 is running.
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.
Warranty label
The warranty will be
voided if the label is
damaged.
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.

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Figure 2-8 Place for attaching
Nameplate
The SUN2000 is labeled with a nameplate on the side that contains the model information,
technical specifications, and compliance symbols, as shown in Figure 2-9 (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

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Table 2-3 describes the compliance symbols.
The certification marks on the nameplate will be subject to the actual product.
Table 2-3 Compliance symbols
Symbol
Name
Meaning
Environmentally friendly
use period (EFUP) label
The SUN2000 does not
pollute the environment
during the specified
period.
EU waste electrical and
electronic equipment
(WEEE) label
Do not dispose of the
SUN2000 as household
garbage.
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
protection is supported on both the DC and AC sides. Figure 2-10 shows the SUN2000
conceptual diagram.
Figure 2-10 SUN2000 conceptual diagram

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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
Table 2-4 describes the three working modes shown in Figure 2-11.
Table 2-4 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.

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Working
Mode
Description
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.