Huawei SUN2000-45KTL-US-HV-D0 User manual

SUN2000-45KTL-US-HV-D0
User Manual
Issue
04
Date
2018-06-01
HUAWEI TECHNOLOGIES CO., LTD.

Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
i
Copyright © Huawei Technologies Co., Ltd. 2018. 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:
http://e.huawei.com

SUN2000-45KTL-US-HV-D0
User Manual
About This Document
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
ii
About This Document
Purpose
This document describes the SUN2000-45KTL-US-HV-D0 (SUN2000 for short) in terms of
its 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
injury, equipment damage, and environment deterioration.

SUN2000-45KTL-US-HV-D0
User Manual
About This Document
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
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 04 (2018-06-01)
Changed Supported Power Grids in 2.1 Introduction to Supported Power Grid Earthing
Systems.Added three power grid earthing systems supported by the SUN2000. Deleted the
description that "The SUN2000 only supports the IT power grid mode" and that "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."
Issue 03 (2018-05-05)
Updated Supported Power Grids in 2.1 Introduction.Added the description that "The
SUN2000 can be configured in common transformer secondary winding scenarios, such as
grounded Y, neutral ungrounded Y, and delta (floating). For any other transformer
configuration, contact Huawei technical support."
Added the description about the metal stamping forming contact in 6.5 Connecting DC Input
Power Cables.
Issue 02 (2017-10-30)
Updated 3 Storage.
Updated 5.1 Crimping the OT Terminal.
Updated 6.3.1 Connecting a Ground Cable to the PE Point (Bonding).
Updated 11 Technical Specifications.
Issue 01 (2017-03-10)
This issue is used for first office application (FOA).

SUN2000-45KTL-US-HV-D0
User Manual
Contents
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
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.......................................................................................................................................................14
3 Storage...........................................................................................................................................16
4 Installation....................................................................................................................................17
4.1 Checking Before Installation ......................................................................................................................................17
4.2 Materials.....................................................................................................................................................................18
4.3 Determining the Installation Position .........................................................................................................................19
4.4 Installing the Mounting Bracket .................................................................................................................................23
4.5 Installing the SUN2000 ..............................................................................................................................................28
5 General Operation ......................................................................................................................31
5.1 Crimping the OT Terminal..........................................................................................................................................31
5.2 Installing the Tube Fittings .........................................................................................................................................33
5.3 Routing Cables Through Waterproof Connectors.......................................................................................................36
6 Electrical Connections................................................................................................................38
6.1 Precautions..................................................................................................................................................................38
6.2 Opening the Maintenance Compartment Door...........................................................................................................38
6.3 Connecting the Ground Cable.....................................................................................................................................40
6.3.1 Connecting a Ground Cable to the PE Point (Bonding)...........................................................................................40
6.3.2 Connecting the Ground Cable to the PV Side Ground Point (GND).......................................................................41
6.4 Connecting AC Output Power Cables.........................................................................................................................42
6.4.1 Connection Through a Tube.....................................................................................................................................43
6.4.2 Connection Through a Waterproof Connector.........................................................................................................45
6.5 Connecting DC Input Power Cables...........................................................................................................................49
6.6 Connecting the Communications Cable......................................................................................................................56
6.6.1 Communication Mode Description..........................................................................................................................56

SUN2000-45KTL-US-HV-D0
User Manual
Contents
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
v
6.6.2 Connecting the RS485 Communications Cable (to a Terminal Block)....................................................................58
6.6.2.1 Connection Through a Tube..................................................................................................................................59
6.6.2.2 Connection Through a Waterproof Connector ......................................................................................................62
6.6.3 Connecting RS485 Communications Cables (to an RJ45 Network Port) ................................................................65
6.6.3.1 Connection Through a Tube..................................................................................................................................66
6.6.3.2 Connection Through a Waterproof Connector ......................................................................................................68
6.7 Closing the Maintenance Compartment Door ............................................................................................................70
7 System Commissioning .............................................................................................................72
7.1 Checking Before Power-On........................................................................................................................................72
7.2 DC Input Detection.....................................................................................................................................................72
7.3 Powering On the SUN2000 ........................................................................................................................................74
7.4 Powering Off the SUN2000........................................................................................................................................80
8 Man-Machine Interactions ........................................................................................................81
8.1 Operations with a USB Flash Drive............................................................................................................................81
8.1.1 Exporting Configurations ........................................................................................................................................81
8.1.2 Importing Configurations ........................................................................................................................................83
8.1.3 Exporting Data.........................................................................................................................................................84
8.1.4 Upgrading................................................................................................................................................................85
8.2 Operations with the SUN2000 App ............................................................................................................................86
8.2.1 Operations Related to theAdvanced User ...............................................................................................................87
8.2.1.1 Setting Grid Parameters........................................................................................................................................87
8.2.1.2 Setting Protection Parameters...............................................................................................................................88
8.2.1.3 Setting Feature Parameters ...................................................................................................................................88
8.2.2 Operations Related to the Special User....................................................................................................................96
8.2.2.1 Setting Grid Parameters........................................................................................................................................96
8.2.2.2 Setting Protection Parameters...............................................................................................................................99
8.2.2.3 Setting Feature Parameters .................................................................................................................................101
8.2.2.4 Setting Power Adjustment Parameters................................................................................................................104
9 System Maintenance.................................................................................................................106
9.1 Routine Maintenance................................................................................................................................................106
9.2 Troubleshooting........................................................................................................................................................107
10 Handling the Inverter.............................................................................................................115
10.1 Removing the SUN2000......................................................................................................................................... 115
10.2 Packing the SUN2000............................................................................................................................................. 115
10.3 Disposing of the SUN2000..................................................................................................................................... 115
11 Technical Specifications ........................................................................................................116
A Acronyms and Abbreviations................................................................................................119
B Contact Information.................................................................................................................120

SUN2000-45KTL-US-HV-D0
User Manual
1 Safety Precautions
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
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.

SUN2000-45KTL-US-HV-D0
User Manual
1 Safety Precautions
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
2
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.
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 (7.87 in.), 300 mm (11.81 in.), 500 mm
(19.69 in.), 600 mm (23.62 in.), and 1000 mm (39.37 in.) 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 (28.74 in.) 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 (140°F).
Follow local laws and regulations when operating the equipment.

SUN2000-45KTL-US-HV-D0
User Manual
1 Safety Precautions
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
3
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 protective shoes.

SUN2000-45KTL-US-HV-D0
User Manual
2 Overview
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
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 into AC power and feeds the power into the power grid.
Models
Figure 2-1 describes the model number.
Figure 2-1 Model number description
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.

SUN2000-45KTL-US-HV-D0
User Manual
2 Overview
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5
Figure 2-2 Network application
(A) PV string
(B) SUN2000
(C) ACDU
(D) Step-up transformer
(E) Power grid
Supported Power Grid Earthing Systems
The following figure shows the power grid earthing systems supported by the SUN2000.
Figure 2-3 Power Grid Earthing System
The SUN2000 can be installed in common transformer secondary winding configuration such as neutral
grounded Y, neutral ungrounded Y, delta (floating). For any other transformer configuration, please
contact Huawei.
2.2 Appearance
SUN2000 Dimensions
Figure 2-4 shows the SUN2000 dimensions.

SUN2000-45KTL-US-HV-D0
User Manual
2 Overview
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
6
Figure 2-4 SUN2000 dimensions
Front view
Figure 2-5 shows the SUN2000 front view.
Figure 2-5 Front view
(1) Maintenance compartment door
(2) LED indicators
(3) Host panel cover
Table 2-1 describes the LED indicators.

SUN2000-45KTL-US-HV-D0
User Manual
2 Overview
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
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 MPPT
circuit is higher than or
equal to 600 V.
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 has
connected to the power
grid.
Off
The SUN2000 does not
connect to the power grid.
Communication
indicator
Blinking green
The SUN2000 receives
data over RS485 or PLC
communication.
Off
The SUN2000 has not
received data over RS485
or 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 (on
Local maintenance fails.

SUN2000-45KTL-US-HV-D0
User Manual
2 Overview
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
8
Indicator
Status
Meaning
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 2-6 shows the SUN2000 bottom view.
Figure 2-6 Bottom view
No.
Component Name
Description
Silk Screen
1
Waterproof cable
connector
Inner diameter: 37–44
mm (1.46–1.73 in.)
AC OUTPUT
2
Waterproof cable
connector
Inner diameter: 10–15
mm (0.39–0.59 in.)
RESERVE
3
USB port
N/A
USB
4
DC switch 1
N/A
DC SWITCH 1
5
DC switch 2
N/A
DC SWITCH 2
6
Waterproof cable
connector
Inner diameter: 14–18
mm (0.55–0.71 in.)
COM1, COM2, COM3

SUN2000-45KTL-US-HV-D0
User Manual
2 Overview
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
9
No.
Component Name
Description
Silk Screen
7
DC input terminal
Controlled by DC
SWITCH 1
+/–
8
DC input terminal
Controlled by DC
SWITCH 2
+/–
9
PV side ground point
N/A
GND
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.

SUN2000-45KTL-US-HV-D0
User Manual
2 Overview
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
10
Table 2-2 Label description
Symbol
Name
Meaning
Electric shock
Lethal voltages 1500
V DC. Keep out.
No user serviceable
parts inside. Only
trained service
personnel are allowed
access.
Both AC and DC
voltage sources are
terminated inside this
equipment. Each
circuit must be
disconnected before
servicing.
When the photovoltaic
array is exposed to
light, it supplies DC
voltage to this
equipment.
The DC conductors of
this photovoltaic
system are ungrounded
and may be energized.
The DC conductors of
this photovoltaic
system are normally
ungrounded but will
become intermittently
grounded without
indication when the
SUN2000 measures
the PV array isolation.
Burn warning
Do not touch a running
SUN2000 because it
generates high
temperatures on the shell.

SUN2000-45KTL-US-HV-D0
User Manual
2 Overview
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
11
Symbol
Name
Meaning
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.
Transformerless inverter
The SUN2000 output
does not pass through an
isolation transformer.
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.
SUN2000 serial number
label
Indicates the SUN2000
serial number.

SUN2000-45KTL-US-HV-D0
User Manual
2 Overview
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
12
Symbol
Name
Meaning
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 2-7. You can also select an appropriate place for attaching the label based
on site requirements.
Figure 2-7 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 2-8.

SUN2000-45KTL-US-HV-D0
User Manual
2 Overview
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
13
Figure 2-8 Nameplate
(1) Trademark and product model
(2) Important technical specifications
(3) Compliance symbols
(4) Company name and country of manufacture
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
American FCC Part 15B
certification
The SUN2000 complies
with FCC Part 15B
certification standards.
American FCC Part 15G
certification
The SUN2000 complies
with FCC Part 15G
certification standards.
CSA certification of
America and Canada
The SUN2000 complies
with CSA certification
standards.
EFUP label
The SUN2000 does not
pollute the environment
during the specified

SUN2000-45KTL-US-HV-D0
User Manual
2 Overview
Issue 04 (2018-06-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
14
Symbol
Name
Meaning
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-phaseAC power through an inverter circuit. Surge
protection is supported on both the DC and AC sides. Figure 2-9 shows the SUN2000
conceptual diagram.
Figure 2-9 SUN2000 conceptual diagram
Working Modes
The SUN2000 can work in standby, operating, or shutdown mode. Figure 2-10 shows the
relationship between the three working modes.