Huawei SUN2000-42KTL User manual

SUN2000-(36KTL,42KTL)
User Manual
Issue
Draft A
Date
2016-05-30
HUAWEI TECHNOLOGIES CO., LTD.

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Copyright © Huawei Technologies Co., Ltd. 2016. 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.
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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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Email:
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SUN2000-(36KTL,42KTL)
User Manual
About This Document
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About This Document
Purpose
This document describes the SUN2000-36KTL/42KTL (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-(36KTL,42KTL)
User Manual
About This Document
Issue Draft A (2016-05-30)
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Change History
Changes between document issues are cumulative. The latest document issue contains all
updates made in previous issues.
Issue Draft A (2016-05-30)
This issue is used for first office application (FOA).

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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 System Installation .....................................................................................................................16
4.1 Checking Before Installation ......................................................................................................................................16
4.2 Tools ...........................................................................................................................................................................17
4.3 Wall-mounting the SUN2000......................................................................................................................................21
4.3.1 Determining the Installation Position ......................................................................................................................21
4.3.2 Moving the Inverter .................................................................................................................................................26
4.3.3 Installing the Mounting Bracket ..............................................................................................................................27
4.3.4 Installing the SUN2000 ...........................................................................................................................................30
4.4 Support-mounting the SUN2000 ................................................................................................................................33
4.4.1 Determining the Installation Position ......................................................................................................................33
4.4.2 Moving the Inverter .................................................................................................................................................36
4.4.3 Installing the Mounting Bracket ..............................................................................................................................36
4.4.4 Installing the SUN2000 ...........................................................................................................................................38
5 Connecting Cables ......................................................................................................................39
5.1 Precautions..................................................................................................................................................................39
5.2 Opening the Maintenance Compartment Door ...........................................................................................................39
5.3 Connecting the Ground Cable (PE) ............................................................................................................................41
5.4 Connecting AC Output Power Cables.........................................................................................................................43
5.5 Connecting DC Input Power Cables...........................................................................................................................47
5.6 Connecting Communications Cables..........................................................................................................................54
5.6.1 Communication Mode Description..........................................................................................................................54
5.6.2 Connecting RS485 Communications Cables ...........................................................................................................56
5.6.3 (Optional) Connecting FE Communications Cables................................................................................................62

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5.7 Closing the Maintenance Compartment Door ............................................................................................................66
6 System Commissioning .............................................................................................................68
6.1 Checking Before Power-On........................................................................................................................................68
6.2 Powering On the SUN2000 ........................................................................................................................................68
6.3 Powering Off the SUN2000........................................................................................................................................74
7 Man-Machine Interactions ........................................................................................................75
7.1 Operations with a USB Flash Drive............................................................................................................................75
7.1.1 Exporting Configurations ........................................................................................................................................75
7.1.2 Importing Configurations ........................................................................................................................................77
7.1.3 Exporting Data.........................................................................................................................................................78
7.1.4 Upgrading................................................................................................................................................................79
7.2 Operations with a SmartLogger..................................................................................................................................80
7.3 Operations with the NMS ...........................................................................................................................................80
7.4 Operations with the SUN2000 APP............................................................................................................................80
8 Maintenance.................................................................................................................................81
8.1 Routine Maintenance..................................................................................................................................................81
8.2 Troubleshooting..........................................................................................................................................................82
9 Handling the SUN2000 ..............................................................................................................90
9.1 Removing the SUN2000.............................................................................................................................................90
9.2 Packing the SUN2000.................................................................................................................................................90
9.3 Disposing of the SUN2000.........................................................................................................................................90
10 Technical Specifications ..........................................................................................................91
A Power Grid Standard Code ......................................................................................................95
B Acronyms and Abbreviations ..................................................................................................99

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User Manual
1 Safety Precautions
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1 Safety Precautions
Personnel Requirements
Only qualified and trained electrical technicians are allowed to install and operate the
inverter.
Operators should understand the components and functioning of a grid-tied PV power
system and be familiar with relevant local standards.
Read this document thoroughly before operations. Huawei shall not be liable for any
consequence caused by violation of the storage, transportation, installation, and operation
regulations specified in this document.
Sign Protection
Do not tamper with any warning signs on the inverter enclosure because these signs
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 forfeited.
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.

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Open the maintenance compartment door of the chassis before connecting cables. Do not
perform any operation on other components inside the chassis except connectingAC
power cables and communications cables.
Cable Connections
Before connecting cables, ensure that the inverter is securely positioned 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 power supply department before using the inverter to
generate electricity in grid-tied mode.
Ensure that the cables used in a grid-tied PV power system are properly connected and
insulated and meet specifications.
Operation
High voltages may cause electric shocks and serious injuries during inverter operating.
Strictly comply with the safety precautions in this document and associated documents when
operating the inverter.
Do not touch an operating inverter because the heat sinks may have a temperature of
greater than 60ºC and may cause burns when the inverter is operating.
Follow local laws and regulations when operating the equipment.
Maintenance and Replacement
High voltages may cause electric shocks and serious injuries during inverter operating.
Therefore, before 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.

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1 Safety Precautions
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Observe ESD precautions during the maintenance.
For personal safety, wear insulation gloves and protective shoes.

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2 Overview
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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 into AC power and feeds the power into the power grid.
Model
Figure 2-1 shows a model number of the SUN2000, using SUN2000-36KTL as an example.
Figure 2-1 Model number description
Table 2-1 shows the rated output power.
Table 2-1 SUN2000 models and corresponding rated output power and voltage
Model
Rated Output Power
SUN2000-36KTL
36 kW
SUN2000-42KTL
42 kW
Network Application
The SUN2000 applies to grid-tied PV power systems for commercial rooftops and large
power stations. Typically, a grid-tied PV power system consists of PV strings, grid-tied
inverters, AC distribution units (ACDUs), and isolation transformer, as shown in Figure 2-2.

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Figure 2-2 Network application
(A) PV string
(B) SUN2000
(C) ACDU
(D) Isolation transformer
(E) Power grid
Supported Power Grids
The SUN2000-36KTL supports the following power grid modes: TN-S, TN-C, TN-C-S, TT,
and IT. The SUN2000-42KTL supports only IT grid mode.
Figure 2-3 Power grid modes
2.2 Appearance
SUN2000 Dimensions
Figure 2-4 shows the SUN2000 dimensions.

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Figure 2-4 SUN2000 dimensions (including the mounting bracket)
Front View
Figure 2-5 shows the SUN2000 front view.
Figure 2-5 SUN2000 front view
(1) Maintenance compartment door
(2) LED indicator
(3) Host panel
Table 2-2 describes the LED indicators.

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Table 2-2 LED indicator description (from left to right)
Indicator
Status
Meaning
PV connection
indicator
Green on
At least one PV string is
properly connected, and
the DC input voltage of
the corresponding MPPT
circuit is higher than or
equal to 200 V.
Green off
The inverter disconnects
from all PV strings, or the
DC input voltage of each
MPPT circuit is less than
200 V.
Grid-tied indicator
Green on
The SUN2000 connects
to the power grid.
Green off
The SUN2000 does not
connect to the power grid.
Communications
indicator
Blinking green at short intervals (on for
0.5s and then off for 0.5s)
The inverter receives data
over RS485, PLC, or FE
communication.
Green off
The inverter has not
received data over RS485,
PLC, or FE
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
for 0.125s and then
off for 0.125s)
Local maintenance fails.
Steady green
Local maintenance
succeeds.

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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.
SUN2000 Rear View
Figure 2-6 shows the SUN2000 rear view.
Figure 2-6 SUN2000 rear view
(1) Heat sink
(2) Mounting bracket
SUN2000 Bottom View
Figure 2-7 shows the SUN2000 bottom view.
Figure 2-7 SUN2000 bottom view

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No.
Component
Silk Screen
1
Waterproof cable connector
AC OUTPUT 1
2
Waterproof cable connector
AC OUTPUT 2
3
USB port
USB
4
DC switch 1
DC SWITCH 1
5
DC switch 2
DC SWITCH 2
6
DC input terminal
+/–
7
Waterproof cable connector
COM1, COM2, COM3
Waterproof cable connector is abbreviated as connector in the following text.
2.3 Label Description
Symbols
Table 2-3 describes the labels on the SUN2000 enclosure and their meanings.
Table 2-3 Label description
Symbol
Name
Meaning
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.
Warranty label
Never open the host panel
of the SUN2000.
SUN2000 serial number
label
Indicates the SUN2000
serial number.
Weight label
The SUN2000 is heavy
and needs to be carried by
multiple persons.
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.

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Figure 2-8 Nameplate (using the SUN2000-42KTLas an example)
(1) Trademark and product model
(2) Important technical specifications
(3) Compliance symbols
(4) Company name and country of manufacture
Table 2-4 describes the compliance symbols.
Table 2-4 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.

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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 2-9 shows the conceptual
diagram for the SUN2000-36KTL. Figure 2-10 shows the conceptual diagram for the
SUN2000-42KTL.
Figure 2-9 Conceptual diagram for the SUN2000-36KTL
Figure 2-10 Conceptual diagram for the SUN2000-42KTL

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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 2-5 describes the three working modes shown in Figure 2-11.
Table 2-5 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.
Operating with Limited Power
It is normal that the inverter operates with limited power and the operating mode may be
caused by either of the following conditions.
1. If the sunlight is good and the PV array output power exceeds the maximum inverter
output power, the inverter does not trace the maximum power point of the PV array.
Instead, the inverter limits the PV array output power close to the maximum inverter
output power to reduce the peak PV array output power.
2. The inverter accepts the power scheduling from the power grid and limits the output
power to the range specified by the power grid. Power grid scheduling includes active
power derating and reactive power compensation. Active power derating means that the
power grid limits the maximum inverter output power. Reactive power compensation
refers to that the power grid instructs the inverter to generate certain capacitive or
sensitive reactive power to compensate the fixed reactive power value in the circuit. Note
that when the inverter delivers reactive power, the maximum apparent output power is
retained but the maximum active output power is affected.