Huawei SUN2000-50KTL-M0 User manual

SUN2000-(50KTL-M0, 70KTL-INM0)
User Manual (India Edition)
Issue
03
Date
2019-07-30
HUAWEI TECHNOLOGIES CO., LTD.

Issue 03 (2019-07-30)
Copyright © Huawei Technologies Co., Ltd.
i
Copyright © Huawei Technologies Co., Ltd. 2019. 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-(50KTL-M0, 70KTL-INM0)
User Manual (India Edition)
About This Document
Issue 03 (2019-07-30)
Copyright © Huawei Technologies Co., Ltd.
ii
About This Document
Purpose
This document describes the SUN2000-50KTL-M0 and SUN2000-70KTL-INM0 (SUN2000
for short) in terms of its 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 intended for photovoltaic (PV) plant personnel and 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 death or serious injury.
Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
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.

SUN2000-(50KTL-M0, 70KTL-INM0)
User Manual (India Edition)
About This Document
Issue 03 (2019-07-30)
Copyright © Huawei Technologies Co., Ltd.
iii
Symbol
Description
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.
Change History
Changes between document issues are cumulative. The latest document issue contains all
updates made in previous issues.
Issue 03 (2019-07-30)
Updated 2.2 Appearance.
Updated 5.4 Installing the AC Output Power Cable.
Updated 6.2 Powering On the SUN2000.
Issue 02 (2018-07-30)
Updated 5.4 Installing the AC Output Power Cable.
Updated 7.2.1.3 Setting Feature Parameters.
Updated 8.2 Troubleshooting.
Issue 01 (2018-04-01)
This issue is used for first office application (FOA).

SUN2000-(50KTL-M0, 70KTL-INM0)
User Manual (India Edition)
Contents
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Contents
About This Document.................................................................................................................... ii
1 Safety Precautions.........................................................................................................................1
2 Overview.........................................................................................................................................4
2.1 Introduction ..................................................................................................................................................................4
2.2 Appearance ...................................................................................................................................................................6
2.3 Label Description..........................................................................................................................................................9
2.3.1 Enclosure Labels........................................................................................................................................................9
2.3.2 Product Nameplate................................................................................................................................................... 11
2.4 Working Principles .....................................................................................................................................................12
2.4.1 Conceptual Diagram................................................................................................................................................12
2.4.2 Working Modes........................................................................................................................................................13
3 Storage...........................................................................................................................................15
4 Installation....................................................................................................................................16
4.1 Checking Before Installation......................................................................................................................................16
4.2 Tools ...........................................................................................................................................................................17
4.3 Determining the Installation Position .........................................................................................................................18
4.3.1 Environment Requirements .....................................................................................................................................18
4.3.2 Space Requirements.................................................................................................................................................19
4.4 Installing the Mounting Bracket.................................................................................................................................22
4.4.1 Support-mounted Installation ..................................................................................................................................23
4.4.2 Wall-mounted Installation........................................................................................................................................25
4.5 Installing the SUN2000 ..............................................................................................................................................27
5 Electrical Connections................................................................................................................32
5.1 Precautions..................................................................................................................................................................32
5.2 Crimping the OT Terminal..........................................................................................................................................32
5.3 Opening the Maintenance Compartment Door...........................................................................................................34
5.4 Installing the AC Output Power Cable........................................................................................................................37
5.5 Connecting DC Input Power Cables...........................................................................................................................45
5.6 Installing the Communications Cable.........................................................................................................................51
5.6.1 Communication Mode Description..........................................................................................................................51
5.6.2 Installing the RS485 Communications Cable..........................................................................................................53

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5.6.2.1 Terminal Block Connection..................................................................................................................................53
5.6.2.2 Connecting Cables to the RJ45 Network Port ......................................................................................................57
5.6.3 (Optional) Installing the Solar Tracker Power Cable...............................................................................................60
5.7 Closing the Maintenance Compartment Door ............................................................................................................64
6 Commissioning............................................................................................................................66
6.1 Checking Before Power-On........................................................................................................................................66
6.2 Powering On the SUN2000 ........................................................................................................................................66
6.3 Powering Off the System............................................................................................................................................71
7 Man-Machine Interactions ........................................................................................................73
7.1 Operations with a USB Flash Drive............................................................................................................................73
7.1.1 Exporting Configurations ........................................................................................................................................73
7.1.2 Importing Configuration..........................................................................................................................................75
7.1.3 Exporting Data.........................................................................................................................................................76
7.1.4 Upgrading................................................................................................................................................................76
7.2 Operations with the SUN2000 App............................................................................................................................78
7.2.1 Operations Related to the Advanced User...............................................................................................................78
7.2.1.1 Setting Grid Parameters........................................................................................................................................78
7.2.1.2 Setting Protect Parameters....................................................................................................................................79
7.2.1.3 Setting Feature Parameters ...................................................................................................................................79
7.2.2 Operations Related to the Special User....................................................................................................................83
7.2.2.1 Setting Grid Parameters........................................................................................................................................83
7.2.2.2 Setting Protection Parameters...............................................................................................................................85
7.2.2.3 Setting Feature Parameters ...................................................................................................................................86
7.2.2.4 Setting PowerAdjustment Parameters..................................................................................................................89
8 Maintenance.................................................................................................................................92
8.1 Routine Maintenance..................................................................................................................................................92
8.2 Troubleshooting..........................................................................................................................................................93
9 Handling the Inverter...............................................................................................................100
9.1 Removing the SUN2000...........................................................................................................................................100
9.2 Packing the SUN2000...............................................................................................................................................100
9.3 Disposing of the SUN2000.......................................................................................................................................100
10 Technical Specifications ........................................................................................................101
A Acronyms and Abbreviations................................................................................................105

SUN2000-(50KTL-M0, 70KTL-INM0)
User Manual (India Edition)
1 Safety Precautions
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1 Safety Precautions
General Safety
Before performing operations, read through this manual and follow all the precautions to
prevent accidents. The "DANGER", "WARNING", "CAUTION", and "NOTICE" marks
in this document do not represent all the safety instructions. They are only supplements to
the safety instructions.
The personnel responsible for installing, connecting cables for, commissioning,
maintaining, and troubleshooting Huawei products should be qualified and trained to
master the correct operation methods and the knowledge of safety precautions.
When operating Huawei equipment, in addition to following the general precautions in this
document, follow the specific safety instructions given by Huawei. 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:
Damage during the transportation by the customer
Violation of the storage requirements specified in this document
Incorrect storage, installation, or use
Installation or use by unqualified personnel
Failure to obey the operation instructions and safety precautions in this document
Operation in extreme environments which are not covered in this document
Operation beyond specified ranges
Unauthorized modifications to the product or software code or removal of the product
Device damage due to force majeure (such earthquake, fire, and storm)
The warranty expires and the warranty service is not extended.
Installation or use in environments which are not specified in related international
standards

SUN2000-(50KTL-M0, 70KTL-INM0)
User Manual (India Edition)
1 Safety Precautions
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Personnel Requirements
Only certified electricians are allowed to install, connect cables for, commission, maintain,
troubleshoot, and replace the SUN2000. Operation personnel must meet the following
requirements:
Receive professional training.
Read through this document and follow all the precautions.
Be familiar with the safety specifications about the electrical system.
Understand the components and functioning of a grid-tied PV system, and be familiar
with relevant local standards.
Wear proper personal protective equipment (PPE) during any operation on the SUN2000.
Protect Labels
Do not scrawl, damage, or block the labels on the SUN2000 enclosure.
Do not scrawl, damage, or block the nameplate on the side of the SUN2000 enclosure.
Installation
Never work under power during installation.
Ensure that the SUN2000 is not connected to a power supply or powered on before
finishing installation.
Ensure that the SUN2000 is installed in a well-ventilated environment.
Ensure that the SUN2000 heat sinks are free from blockage.
Never open the host panel cover of the SUN2000.
Never remove the terminals and cable glands at the bottom of the SUN2000.
Electrical Connections
Before connecting cables to the SUN2000, ensure that the SUN2000 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 electric utility before using the SUN2000 to generate
electricity in grid-tied mode.
Ensure that the cables used in a grid-tied PV system are properly connected and insulated
and meet all specification requirements.
Operation

SUN2000-(50KTL-M0, 70KTL-INM0)
User Manual (India Edition)
1 Safety Precautions
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High voltage may cause an electric shock, which results in serious injury, death or serious
property damage from the SUN2000 in operation. Strictly comply with the safety precautions
in this document and associated documents to operate the SUN2000.
Do not touch an energized SUN2000 because the heat sink has a high temperature.
Follow local laws and regulations when operating the SUN2000.
Maintenance and Replacement
High voltage may cause an electric shock, which results in serious injury, death or serious
property damage from the SUN2000 in operation. Prior to maintenance, power off the
SUN2000 and strictly comply with the safety precautions in this document and associated
documents to operate the SUN2000.
Maintain the SUN2000 with sufficient knowledge of this document, proper tools, and
testing equipment.
Before performing maintenance tasks, power off the SUN2000 and wait at least 15
minutes.
Temporary warning labels or fences must be placed to prevent unauthorized people
entering the site.
Rectify any faults that may compromise the SUN2000 security performance before
powering on the SUN2000 again.
Observe electrostatic discharge (ESD) precautions during maintenance.

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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 intoAC power and feeds the power to the power grid.
Model
Figure 2-1 Model identifier
Identifier
Meaning
Value
1
Series name
SUN2000: commercial string inverter
2
Power
50K: The power level is 50 kW.
70K: The power level is 70 kW.
3
Topology
TL: transformerless
4
Region
IN: India
5
Design code
M0: the product series with the 1100 V DC
input voltage

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Networking Application
The SUN2000 applies to grid-tied PV systems for commercial rooftops and large PV plants.
Typically, a grid-tied PV system consists of the PV string, SUN2000, alternating current
distribution unit (ACDU), and step-up transformer.
Figure 2-2 Network diagram
(A) PV string
(B) SUN2000
(C) ACDU
(D) Step-up transformer
(E) Power grid
Supported Power Grid
The SUN2000-50KTL-M0 supports the following power grids: TN-S, TN-C, TN-C-S, TT,
and IT. The SUN2000-70KTL-INM0 supports the IT power grid only.
Figure 2-3 Supported power grid

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2.2 Appearance
Dimensions
Front View
(1) Maintenance compartment door
(2) LED
(3) Host panel cover
LED
Status
Meaning
PV connection LED
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 200 V.
Off
The SUN2000 disconnects
from all PV strings, or the DC
input voltage of each MPPT
circuit is less than 200 V.
Grid-tied LED
Steady green
The SUN2000 is exporting
power to the power grid.

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Off
The SUN2000 is not exporting
power to the power grid.
Communication
LED
Blinking green (on for 0.2s and
then off for 0.2s)
The SUN2000 receives
communications data normally.
Off
The SUN2000 receives no
communications data for 10s.
Alarm/Maintenance
LED
Alarm
status
Blinking red at
long intervals (on
for 1s and then off
for 4s)
The SUN2000 is generating a
warning alarm.
Blinking red at
short intervals (on
for 0.5s and then
off for 0.5s)
The SUN2000 is generating a
minor alarm.
Steady red
The SUN2000 is generating a
major alarm.
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 is
successful.
Local maintenance refers to operations performed after a USB flash drive, a WLAN module, a
Bluetooth module, or a USB data cable is inserted into the USB port of the solar inverter. For
example, local maintenance includes data import and export using a USB flash drive, and connecting
to the SUN2000 app over a WLAN module, a Bluetooth module, or a USB data cable.
If the alarming and the local maintenance happen concurrently, the alarm/maintenance indicator
shows the local maintenance state first. After the USB flash drive, WLAN module, Bluetooth
module, or USB data cable is removed, the indicator shows the alarm state.

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Bottom View
No.
Component
Silk Screen
Description
1
Cable gland
COM1, COM2, and
COM3
Inner diameter: 14–18 mm
2
DC switch 1
DC SWITCH 1
N/A
3
DC input terminals
+/–
Controlled by DC
SWITCH 1
4
DC input terminals
+/–
Controlled by DC
SWITCH 2
5
DC switch 2
DC SWITCH 2
N/A
6
Cable gland
AC OUTPUT
Inner diameter: 18–44 mm
or 24–57 mm
7
Cable gland
RESERVE
Inner diameter: 14–18 mm
8
USB port
USB
N/A
Holes Reserved at the Side of the Enclosure
There are two M6 tapped holes reserved on both sides of the enclosures, which are used for installing an
awning.

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2.3 Label Description
2.3.1 Enclosure Labels
Label
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
certified electricians
are allowed to perform
operations on the
SUN2000.
Residual voltage exists
after the SUN2000 is
powered off. It takes
15 minutes for the
SUN2000 to discharge
to the safe voltage.
Refer to documentation
Reminds operators to
refer to the documents
provided with the
SUN2000.
Grounding
Indicates the position for
connecting the PE cable.
Operation warning
Do not remove the DC
input connector when the
SUN2000 is running.

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Label
Name
Meaning
DC terminal operation
warning
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
(SN) label
Indicates the SUN2000
SN.
Weight label
The SUN2000 needs to be
carried by four people or
using a pallet truck.

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2.3.2 Product Nameplate
Figure 2-4 Nameplate of the SUN2000-50KTL-M0
(1) Trademark, product name, and model
number
(2) Important technical specifications
(3) Compliance symbols
(4) Company name and place of
production
The nameplate figure is for reference only.
Label
Name
Meaning
ConformitéEuropéenne
(CE) certification mark
This product complies
with CE certification
standards.
Australia RCM
certification
The product complies
with Australia RCM
certification standards.
CQC certification mark
The SUN2000 has been
awarded the NB/T 32004
certification by China
Quality Certification
Center (CQC).
China Environmentally
friendly use period
(EFUP)
This product is
environmentally friendly
for at least 50 years.

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Label
Name
Meaning
European Union (EU)
waste electrical and
electronic equipment
(WEEE)
This product must not be
disposed of as domestic
waste.
2.4 Working Principles
2.4.1 Conceptual Diagram
The SUN2000 receives inputs from 12 PV strings. Then the inputs are grouped into six 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 2-5 SUN2000-50KTL-M0 conceptual diagram

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Figure 2-6 SUN2000-70KTL-INM0 conceptual diagram
2.4.2 Working Modes
The SUN2000 can work in Standby, Operating, or Shutdown mode.

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Figure 2-7 SUN2000 working modes
Table 2-1 Working mode description
Working
Mode
Description
Standby
The SUN2000 enters 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 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.
The SUN2000 enters Shutdown mode after detecting a fault or a
shutdown command, and enters Standby mode after detecting that the
PV string output power is not suitable for connecting to the power grid
and producing 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 rectified.