Huawei SUN2000-50KTL-ZHM3 User manual

SUN2000-(50KTL-ZHM3, 50KTL-M3)
User Manual
Issue 03
Date 2022-08-30
HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2022. 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 specied 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 eort 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
Issue 03 (2022-08-30) Copyright © Huawei Technologies Co., Ltd. i

About This Document
Overview
This document describes the SUN2000-50KTL-ZHM3 and SUN2000-50KTL-M3
(also referred to as SUN2000) in terms of their installation, electrical connections,
commissioning, maintenance, and troubleshooting. Before installing and operating
the SUN2000, ensure that you are familiar with the features, functions, and safety
precautions provided in this document.
Intended Audience
This document is applicable to:
● Installers
● Users
Symbol Conventions
The symbols that may be found in this document are dened 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.
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Symbol Description
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.
Change History
Changes between document issues are cumulative. The latest document issue
contains all changes made in earlier issues.
Issue 03 (2022-08-30)
Added the SUN2000-50KTL-M3 model.
Updated 2.1 Product Introduction.
Updated 10 Technical Specications.
Updated A Grid Codes.
Added G Rapid Shutdown.
Added H NS Protection.
Issue 02 (2022-08-12)
Updated 5.2 Preparing Cables.
Updated 5.4 Connecting the AC Output Power Cable.
Updated 5.5 Installing the DC Input Power Cable.
Updated 10 Technical Specications.
Issue 01 (2022-05-20)
This issue is the rst ocial release.
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Contents
About This Document................................................................................................................ ii
1 Safety Information.................................................................................................................. 1
1.1 General Safety.......................................................................................................................................................................... 1
1.2 Personnel Requirements....................................................................................................................................................... 2
1.3 Electrical Safety........................................................................................................................................................................3
1.4 Installation Environment Requirements.......................................................................................................................... 4
1.5 Mechanical Safety................................................................................................................................................................... 4
1.6 Commissioning......................................................................................................................................................................... 6
1.7 Maintenance and Replacement..........................................................................................................................................6
2 Overview....................................................................................................................................7
2.1 Product Introduction.............................................................................................................................................................. 7
2.2 Appearance................................................................................................................................................................................ 9
2.3 Label Description.................................................................................................................................................................. 10
2.4 Working Principles................................................................................................................................................................ 12
2.4.1 Circuit Diagram.................................................................................................................................................................. 12
2.4.2 Working Modes.................................................................................................................................................................. 12
3 SUN2000 Storage...................................................................................................................14
4 Installation..............................................................................................................................15
4.1 Checking Before Installation............................................................................................................................................. 15
4.2 Tool Preparation.................................................................................................................................................................... 16
4.3 Selecting an Installation Position.................................................................................................................................... 17
4.4 Moving the SUN2000.......................................................................................................................................................... 21
4.5 Installing the Mounting Bracket...................................................................................................................................... 22
4.5.1 Support-mounted Installation.......................................................................................................................................23
4.5.2 Wall-mounted Installation............................................................................................................................................. 24
4.6 Installing a SUN2000........................................................................................................................................................... 25
5 Electrical Connections.......................................................................................................... 27
5.1 Precautions.............................................................................................................................................................................. 27
5.2 Preparing Cables................................................................................................................................................................... 28
5.3 Connecting the PE Cable.................................................................................................................................................... 30
5.4 Connecting the AC Output Power Cable...................................................................................................................... 32
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5.5 Installing the DC Input Power Cable.............................................................................................................................. 37
5.6 (Optional) Installing the Smart Dongle........................................................................................................................ 40
5.7 Connecting the Signal Cable............................................................................................................................................. 42
5.7.1 Communication Modes................................................................................................................................................... 44
5.7.2 (Optional) Connecting the RS485 Communications Cable to the SUN2000............................................... 46
5.7.3 (Optional) Connecting the RS485 Communications Cable to the Power Meter.........................................47
5.7.4 (Optional) Connecting the Power Grid Scheduling Signal Cable..................................................................... 48
6 Commissioning.......................................................................................................................50
6.1 Checking Before Power-On................................................................................................................................................50
6.2 System Power-On................................................................................................................................................................. 51
7 Man-Machine Interaction....................................................................................................53
7.1 Scenario in Which SUN2000s Are Connected to the FusionSolar Smart PV Management System.........54
7.1.1 (Optional) Registering an Installer Account............................................................................................................ 54
7.1.2 Creating a PV Plant and a User.................................................................................................................................... 55
7.1.3 SmartLogger Networking Scenario............................................................................................................................. 55
7.2 Scenario in Which SUN2000s Are Connected to Other Management Systems..............................................56
7.3 Energy Control....................................................................................................................................................................... 56
7.3.1 Grid-tied Point Control.................................................................................................................................................... 56
7.3.2 Apparent Power Control on the Inverter Output Side..........................................................................................60
8 Maintenance...........................................................................................................................62
8.1 System Power-O.................................................................................................................................................................62
8.2 Routine Maintenance.......................................................................................................................................................... 63
8.3 Troubleshooting..................................................................................................................................................................... 64
8.4 Replacing a Fan..................................................................................................................................................................... 74
9 Handling the Inverter...........................................................................................................77
9.1 Removing the SUN2000..................................................................................................................................................... 77
9.2 Packing the SUN2000..........................................................................................................................................................77
9.3 Disposing of the SUN2000................................................................................................................................................ 77
10 Technical Specications.....................................................................................................78
A Grid Codes...............................................................................................................................85
B Device Commissioning......................................................................................................... 90
C Built-in PID Recovery............................................................................................................93
D Resetting Password.............................................................................................................. 94
E Setting Dry Contact Scheduling Parameters.................................................................. 95
F AFCI...........................................................................................................................................96
G Rapid Shutdown....................................................................................................................98
H NS Protection.........................................................................................................................99
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I Smart I-V Curve Diagnosis................................................................................................. 100
J Contact Information............................................................................................................101
K Acronyms and Abbreviations........................................................................................... 103
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1 Safety Information
1.1 General Safety
Statement
Before installing, operating, and maintaining the equipment, read this document
and observe all the safety instructions on the equipment and in this document.
The "NOTICE", "CAUTION", "WARNING", and "DANGER" statements in this
document do not cover all the safety instructions. They are only supplements to
the safety instructions. Huawei will not be liable for any consequence caused by
the violation of general safety requirements or design, production, and usage
safety standards.
Ensure that the equipment is used in environments that meet its design
specications. Otherwise, the equipment may become faulty, and the resulting
equipment malfunction, component damage, personal injuries, or property
damage are not covered under the warranty.
Follow local laws and regulations when installing, operating, or maintaining the
equipment. The safety instructions in this document are only supplements to local
laws and regulations.
Huawei will not be liable for any consequences of the following circumstances:
● Operation beyond the conditions specied in this document
● Installation or use in environments which are not specied in relevant
international or national standards
● Unauthorized modications to the product or software code or removal of the
product
● Failure to follow the operation instructions and safety precautions on the
product and in this document
● Equipment damage due to force majeure, such as earthquakes, re, and
storms
● Damage caused during transportation by the customer
● Storage conditions that do not meet the requirements specied in this
document
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General Requirements
D ANGER
Do not work with power on during installation.
● Do not install, use, or operate outdoor equipment and cables (including but
not limited to moving equipment, operating equipment and cables, inserting
connectors to or removing connectors from signal ports connected to outdoor
facilities, working at heights, and performing outdoor installation) in harsh
weather conditions such as lightning, rain, snow, and level 6 or stronger wind.
● After installing the equipment, remove idle packing materials such as cartons,
foam, plastics, and cable ties from the equipment area.
● In the case of a re, immediately leave the building or the equipment area,
and turn on the re alarm bell or make an emergency call. Do not enter the
building on re in any case.
● Do not scrawl, damage, or block any warning label on the equipment.
● Tighten the screws to the specied torque using tools when installing the
equipment.
● Understand the components and functioning of a grid-tied PV power system
and relevant local standards.
● Repaint any paint scratches caused during equipment transportation or
installation in a timely manner. Equipment with scratches cannot be exposed
to an outdoor environment for a long period of time.
● Do not open the host panel of the equipment.
● You shall not reverse engineer, decompile, disassemble, adapt, add code to
the device software or alter the device software in any other way, research the
internal implementation of the device, obtain the device software source
code, infringe on Huawei's intellectual property, or disclose any device
software performance test results.
Personal Safety
● If there is a probability of personal injury or equipment damage during
operations on the equipment, immediately stop the operations, report the
case to the supervisor, and take feasible protective measures.
● Use tools correctly to avoid hurting people or damaging the equipment.
● Do not touch the energized equipment, as the enclosure is hot.
1.2 Personnel Requirements
● Personnel who plan to install or maintain Huawei equipment must receive
thorough training, understand all necessary safety precautions, and be able to
correctly perform all operations.
● Only qualied professionals or trained personnel are allowed to install,
operate, and maintain the equipment.
● Only qualied professionals are allowed to remove safety facilities and inspect
the equipment.
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● Personnel who will operate the equipment, including operators, trained
personnel, and professionals, should possess the local national required
qualications in special operations such as high-voltage operations, working
at heights, and operations of special equipment.
● Only professionals or authorized personnel are allowed to replace the
equipment or components (including software).
NO TE
● Professionals: personnel who are trained or experienced in equipment operations
and are clear of the sources and degree of various potential hazards in equipment
installation, operation, and maintenance
● Trained personnel: personnel who are technically trained, have required experience,
are aware of possible hazards on themselves in certain operations, and are able to
take protective measures to minimize the hazards on themselves and other people
● Operators: operation personnel who may come in contact with the equipment,
except trained personnel and professionals
1.3 Electrical Safety
Grounding
● For the equipment that needs to be grounded, install the ground cable rst
when installing the equipment and remove the ground cable last when
removing the equipment.
● Do not damage the ground conductor.
● Do not operate the equipment in the absence of a properly installed ground
conductor.
● Ensure that the equipment is connected permanently to the protective
ground. Before operating the equipment, check its electrical connection to
ensure that it is securely grounded.
General Requirements
D ANGER
Before connecting cables, ensure that the equipment is intact. Otherwise, electric
shocks or re may occur.
● Ensure that all electrical connections comply with local electrical standards.
● Obtain approval from the local electric utility company before using the
equipment in grid-tied mode.
● Ensure that the cables you prepared meet local regulations.
● Use dedicated insulated tools when performing high-voltage operations.
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AC and DC Power
D ANGER
Do not connect or disconnect power cables with power on. Transient contact
between the core of the power cable and the conductor will generate electric arcs
or sparks, which may cause re or personal injury.
● Before making electrical connections, switch o the disconnector on the
upstream device to cut o the power supply if people may contact energized
components.
● Before connecting a power cable, check that the label on the power cable is
correct.
● If the equipment has multiple inputs, disconnect all the inputs before
operating the equipment.
Cabling
● When routing cables, ensure that a distance of at least 30 mm exists between
the cables and heat-generating components or areas. This prevents damage
to the insulation layer of the cables.
● Bind cables of the same type together. When routing cables of dierent types,
ensure that they are at least 30 mm away from each other.
● Ensure that the cables used in a grid-tied PV power system are properly
connected and insulated and meet specications.
1.4 Installation Environment Requirements
● Ensure that the equipment is installed in a well ventilated environment.
● To prevent re due to high temperature, ensure that the ventilation vents or
heat dissipation system are not blocked when the equipment is running.
● Do not expose the equipment to ammable or explosive gas or smoke. Do
not perform any operation on the equipment in such environments.
1.5 Mechanical Safety
Using Ladders
● Use wooden or berglass ladders when you need to perform live working at
heights.
● When a step ladder is used, ensure that the pull ropes are secured and the
ladder is held rm.
● Before using a ladder, check that it is intact and conrm its load bearing
capacity. Do not overload it.
● Ensure that the wider end of the ladder is at the bottom, or protective
measures have been taken at the bottom to prevent the ladder from sliding.
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● Ensure that the ladder is securely positioned. The recommended angle for a
ladder against the oor is 75 degrees, as shown in the following gure. An
angle rule can be used to measure the angle.
● When climbing a ladder, take the following precautions to reduce risks and
ensure safety:
– Keep your body steady.
– Do not climb higher than the fourth rung of the ladder from the top.
– Ensure that your body's center of gravity does not shift outside the legs
of the ladder.
Drilling Holes
When drilling holes into a wall or oor, observe the following safety precautions:
● Wear goggles and protective gloves when drilling holes.
● When drilling holes, protect the equipment from shavings. After drilling, clean
up any shavings that have accumulated inside or outside the equipment.
Moving Heavy Objects
● Be cautious to avoid injury when moving heavy objects.
● When moving the equipment by hand, wear protective gloves to prevent
injuries.
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1.6 Commissioning
When the equipment is powered on for the rst time, ensure that professional
personnel set parameters correctly. Incorrect settings may result in inconsistency
with local certication and aect the normal operation of the equipment.
1.7 Maintenance and Replacement
D ANGER
High voltage generated by the equipment during operation may cause an electric
shock, which could result in death, serious injury, or serious property damage.
Prior to maintenance, power o the equipment and strictly comply with the safety
precautions in this document and relevant documents.
● Maintain the equipment with sucient knowledge of this document and
using proper tools and testing equipment.
● Before maintaining the equipment, power it o and follow the instructions on
the delayed discharge label to ensure that the equipment is powered o.
● Turn o the AC and DC switches of the SUN2000 when maintaining the
electric equipment or power distribution equipment connected the SUN2000.
● Place temporary warning signs or erect fences to prevent unauthorized access
to the maintenance site.
● If the equipment is faulty, contact your dealer.
● The equipment can be powered on only after all faults are rectied. Failing to
do so may escalate faults or damage the equipment.
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2 Overview
2.1 Product Introduction
Function
The SUN2000 inverter 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.
Model
This document covers the following SUN2000 models:
● SUN2000-50KTL-ZHM3
● SUN2000-50KTL-M3
Figure 2-1 Model description
Table 2-1 Model description
ID Meaning Value
1 Series name SUN2000: three-phase grid-tied PV string
inverter
2 Power class 50K: rated power of 50 kW
3 Topology TL: transformerless
4 Region ZH: China
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ID Meaning Value
5 Product code M3: product series with an input voltage level
of 1100 V DC
Networking Application
The SUN2000 applies to the grid-tied systems of industrial and commercial
rooftops and small ground PV plants. Typically, a grid-tied system consists of PV
strings, grid-tied inverters, AC switches, and power distribution units.
Figure 2-2 Networking application - single inverter scenario
(1) PV string (2) SUN2000 (3) AC power distribution
unit
(4) Isolation transformer (5) Power grid
Supported Power Grid Types
The SUN2000 supports TN-S, TN-C, TN-C-S, TT, and IT power grids.
Figure 2-3 Power grid types
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2.2 Appearance
Figure 2-4 Appearance
(1) LED indicator (2) Front panel
(3) Screws for xing the awning (4) Communications port (COM)
(5) Hole for the DC switch locking
screw
(6) DC switch (DC SWITCH)
(7) Smart Dongle port (4G/WLAN-FE) (8) DC input terminals (PV1–PV8)
(9) Ventilation valve (10) AC output port
(11) Ground point (12) Fan
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2.3 Label Description
Enclosure Labels
Symbol Name Description
Delay discharge Residual voltage exists
after the SUN2000 is
powered o. It takes 5
minutes for the
SUN2000 to discharge
to the safe voltage.
Burn warning Do not touch a
running SUN2000
because it generates
high temperatures on
the shell.
Electric shock warning ● High voltage exists
after the SUN2000
is powered on. Only
qualied and
trained electrical
technicians are
allowed to perform
operations on the
SUN2000.
● High touch current
exists after the
SUN2000 is
powered on. Before
powering on the
SUN2000, ensure
that the SUN2000
is properly
grounded.
Refer to
documentation
Reminds operators to
refer to the documents
delivered with the
SUN2000.
Grounding label Indicates the position
for connecting the PE
cable.
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Symbol Name Description
Operation warning Do not remove the DC
input connector or AC
output connector with
power on.
Weight label The SUN2000 is heavy
and needs to be
carried by three
persons.
Burn warning on
inverter handles
Do not touch the
handles within 10
minutes after the
inverter is shut down.
Indicator Indicates the SUN2000
operating information.
SUN2000 serial
number
Indicates the serial
number.
SUN2000 WiFi login
QR code
Scan the QR code to
connect to the Huawei
SUN2000 WiFi
network.
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2.4 Working Principles
2.4.1 Circuit Diagram
A SUN2000 can connect to a maximum of eight PV strings and has four MPPT
circuits inside. Each MPPT circuit tracks the maximum power point of two PV
strings. The SUN2000 converts DC power into single-phase AC power through an
inverter circuit. Surge protection is supported on both the DC and AC sides.
Figure 2-5 Schematic diagram
2.4.2 Working Modes
The SUN2000 can work in Standby, Operating, or Shutdown mode.
Figure 2-6 Working modes
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Table 2-2 Working mode description
Working
Mode
Description
Standby The SUN2000 enters Standby mode when the external
environment does not meet the operating requirements. In
Standby mode:
● The SUN2000 continuously performs status check and enters
the Operating mode once the operating requirements are met.
● The SUN2000 enters 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.
● If the SUN2000 detects a fault or a shutdown command, it
enters the Shutdown mode.
● The SUN2000 enters Standby mode after detecting that the PV
string output power is not suitable for connecting to the power
grid for generating power.
Shutdown ● In Standby or Operating mode, the SUN2000 enters Shutdown
mode after detecting a fault or shutdown command.
● In Shutdown mode, the SUN2000 enters Standby mode after
detecting a startup command or that the fault is rectied.
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