ZUCCHETTI AZZURRO 3PH 250KTL-HV User manual

Identification: MD-AL-GI-00 Rev. 0.0 of 20/10/2022 - Application: GID
Pile Reg. IT12110P00002965 - Share Capital € 100,000.00 fully paid up
AR Companies Reg. no. 03225010481 - REA AR - 94189
ISO 9001 Certified Company - Certificate no. 9151 - CNS0 - IT-17778
Zucchetti Centro Sistemi S.p.A. - Green Innovation Division
Via Lungarno, 248 - 52028 Terranuova Bracciolini - Arezzo, Italy
tel. [phone] - fax. [phone]
[e-mail] - [email protected] –www.zcsazzurro.com
Grid-connected inverter
3PH 250KTL-255KTL
User Manual

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User’s Manual 3PH 250KTL-255KTL-HV
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Identification: MD-AL-GI-00
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Table of Contents
1. Preliminary safety instructions ..............................................................................................................................................................7
1.1. Safety instructions ....................................................................................................................................................................7
1.2. Symbols and icons..................................................................................................................................................................10
2. Product features.........................................................................................................................................................................................12
2.1. Product presentation............................................................................................................................................................12
2.2. Description of functions ......................................................................................................................................................14
2.3. Module protection..................................................................................................................................................................16
2.4. Efficiency and derating curves..........................................................................................................................................18
3. Inverter Storage..........................................................................................................................................................................................19
4. Installation....................................................................................................................................................................................................20
4.1. Installation process ...............................................................................................................................................................21
4.2. Checks before installation...................................................................................................................................................21
4.3. Installation tools.....................................................................................................................................................................23
4.4. Installation position ..............................................................................................................................................................25
4.5. Moving the 3PH 250KTL-255KTL-HV inverter ........................................................................................................28
4.6. Installing the 3PH 250KTL-255KTL-HV inverter ....................................................................................................31
5. Electrical connections..............................................................................................................................................................................35
5.1. Electrical connections ..........................................................................................................................................................36
5.2. Terminal connector ...............................................................................................................................................................36
5.3. Connecting PNGD cables (grounding)...........................................................................................................................37
5.4. Connecting the AC output power cables.......................................................................................................................39
5.5. Connect the power cord of the tracking system (optional)..................................................................................44
5.6. Connecting the DC input power cables .........................................................................................................................45
5.7. Connecting the communication cables .........................................................................................................................48
6. Commissioning the inverter..................................................................................................................................................................56
6.1. Safety inspection before commissioning......................................................................................................................56
6.2. Starting the inverter..............................................................................................................................................................57
7. Operating interface ...................................................................................................................................................................................58

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7.1. Operating panel and display..............................................................................................................................................58
7.2. Main interface..........................................................................................................................................................................59
7.3. Main menu.................................................................................................................................................................................62
7.4. Updating Inverter Software ...............................................................................................................................................65
8. Troubleshooting and maintenance ....................................................................................................................................................67
8.1. Troubleshooting......................................................................................................................................................................67
8.2. Maintenance .............................................................................................................................................................................72
8.3. Maintenance .............................................................................................................................................................................73
8.4. SVG................................................................................................................................................................................................73
1. Uninstalling ..................................................................................................................................................................................................74
1.1. Uninstallation steps...............................................................................................................................................................74
1.2. Packaging...................................................................................................................................................................................74
1.3. Storage ........................................................................................................................................................................................74
1.4. Disposal ......................................................................................................................................................................................74
2. Technical data..............................................................................................................................................................................................75
2.1. Technical data 250KTL-255KTL-HV...............................................................................................................................75
3. Monitoring systems ..................................................................................................................................................................................76
3.1. External Wi-Fi adapter.........................................................................................................................................................76
3.1.1. Installation ................................................................................................................................................................................76
3.1.2. Configuration ...........................................................................................................................................................................77
3.1.3. Verification................................................................................................................................................................................86
3.1.4. Troubleshooting......................................................................................................................................................................88
3.2. Ethernet adapter.....................................................................................................................................................................93
3.2.1. Installation ................................................................................................................................................................................93
3.2.2. Verification................................................................................................................................................................................95
3.2.3. Troubleshooting......................................................................................................................................................................96
3.3. 4G adapter.................................................................................................................................................................................98
3.3.1. Installation ................................................................................................................................................................................98
3.3.2. Verification............................................................................................................................................................................. 100
3.4. Datalogger ..............................................................................................................................................................................103
3.4.1. Preliminary notes on how to configure the datalogger ......................................................................................103

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3.4.2. Electrical connections and configuration..................................................................................................................104
3.4.3. ZSM-DATALOG-04 AND ZSM-DATALOG-10 DEVICES ..........................................................................................108
3.4.4. WI-FI CONFIGURATION.................................................................................................................................................... 108
3.4.5. Ethernet configuration...................................................................................................................................................... 108
3.4.6. Checking that the datalogger has been configured correctly ...........................................................................115
3.4.7. ZSM-RMS001/M200 and ZSM-RMS001/M1000 Devices ..................................................................................119
3.4.7.1. Mechanical description and Datalogger interface.......................................................................................119
3.4.7.2. Connecting the Datalogger to the inverters....................................................................................................120
3.4.7.3. Internet connection via Ethernet cable............................................................................................................ 120
3.4.7.4. Connecting the power supply and battery pack to the Datalogger ......................................................120
3.4.7.5. Connecting the LM2-485 PRO cell irradiance and temperature sensor to the datalogger ........121
3.4.8. Configuring the Datalogger.............................................................................................................................................122
3.4.8.1. Configuring the Datalogger on the ZCS Azzurro portal.............................................................................124
3.4.8.2. Network configuration............................................................................................................................................125
3.4.9. Local monitoring.................................................................................................................................................................. 126
3.4.9.1. Requirements for installation of local monitoring...................................................................................... 126
3.4.9.2. Features of local monitoring................................................................................................................................. 126
4. Warranty terms and conditions........................................................................................................................................................128

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General instructions
This manual contains important safety instructions that must be followed during installation and
maintenance of the equipment.
Please keep these instructions!
This manual must be considered an integral part of the equipment, and must be available at all times to
everyone who interacts with the equipment. The manual must always accompany the equipment, even when
it is transferred to another user or plant.
Copyright statement
Copyright of this manual belongs to Zucchetti Centro Sistemi S.p.A. No part of this manual (including the
software, etc.) may be copied, reproduced or distributed in any form or by any means without the
permission of Zucchetti Centro Sistemi S.p.A. All rights reserved. ZCS reserves the right to final
interpretation. This manual is subject to change based on feedback from users, installers or customers.
Please check our website http://www.zcsazzurro.com for the latest version.
Technical support
ZCS offers a support and technical consultancy service accessible by sending a request directly from the
website www.zcsazzurro.com
For the Italian territory, the following toll-free number is available: 800 72 74 64.

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Preface
General information
Please read this manual carefully before installation, use or maintenance.
This manual contains important safety instructions that must be followed during installation and
maintenance of the system.
Scope
This manual describes the assembly, installation, electrical connections, commissioning, maintenance and
troubleshooting of the following inverters:
3PH 250KTL-HV / 3PH 255KTL-HV
Keep this manual so that it is accessible at all times.
Recipients
This manual is intended for qualified technical personnel (installers, technicians, electricians, technical
support personnel or anyone who is qualified and certified to operate a photovoltaic system), who are
responsible for installing and starting the inverter in the photovoltaic system and for operators of the
photovoltaic system.
Symbols used
This manual provides information for safe operation and uses certain symbols to ensure the safety of
personnel and materials, and for efficient use of the equipment during normal operation.
It is important to understand this information to avoid accidents and damage to property. Please take note
of the following symbols used in this manual.
Danger: indicates a hazardous situation which, if not resolved or avoided,
could result in serious personal injury or death.
Danger
Warning: indicates a hazardous situation which, if not resolved or avoided,
could result in serious personal injury or death.
Warning
Caution: indicates a hazardous situation which, if not resolved or avoided,
could result in minor or moderate personal injury.
Caution
Attention: indicates a potentially hazardous situation which, if not resolved or
avoided, could result in damage to the system or other property.
Attention
Note: provides important tips on the correct and optimal operation of the
product.

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1. Preliminary safety instructions
If you have problems or questions regarding the reading and
understanding of the following information, please contact Zucchetti
Centro Sistemi S.p.A. through the appropriate channels.
Note
General information in this chapter
Safety instructions
It mainly highlights the safety instructions to be followed during installation and use of the equipment.
Symbols and icons
Introduces the main safety symbols on the inverter.
1.1. Safety instructions
Before installing and using the equipment, make sure you read and understand the instructions in this
manual and familiarise yourself with the relative safety symbols shown in this chapter.
Depending on national and local requirements, permission must be obtained from your local provider before
connecting to the electrical grid, making sure that the connections are carried out by a qualified electrician.
Contact the nearest authorised service centre for any repairs or maintenance. Contact your distributor for
information on the nearest authorised service centre. DO NOT carry out repairs yourself, as this may result
in injury or damage.
Before installing and operating the equipment, the electrical circuit of the strings must be disconnected by
opening the string circuit breaker to interrupt the high-voltage DC of the photovoltaic system. Failure to do
so could result in serious injury.
Qualified personnel
Ensure that the operator has the necessary skills and training to operate the equipment. Personnel
responsible for use and maintenance of the equipment must be qualified and capable of performing the
activities described, and must also have appropriate knowledge on how to correctly interpret the contents
of this manual. For safety reasons, this inverter can only be installed by a qualified electrician with the
necessary training and/or skills and knowledge. Zucchetti Centro Sistemi S.p.A. declines all responsibility for
damage to property or personal injury caused by incorrect use of the device.
Label and Symbols
ZCS AZZURRO 250/255KTL-HV has type label attach the side of product which contact important
information and technical data, the type label must permanent attached to the product.
ZCS AZZURRO 250/255KTL-HV has warming symbol attache the product which contact information of
safety operation. The warming symbol must permanent attached to the product.
Installation requirements
Install and start the inverter according to the following instructions. Place the inverter on suitable load-
bearing supports with sufficient load capacity (such as walls or photovoltaic racks) and make sure that the
inverter is positioned vertically. Choose a suitable location for the installation of the electrical equipment.
Make sure there is sufficient space for heat dispersion and to accommodate future maintenance. Maintain

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adequate ventilation and ensure that there is enough air circulation for cooling. Air humidity should less
than 90%.
Figure 1 –Do not lose or damage this manual
Transport requirements
If you encounter problems with the packaging, or if you find any visible damage, please notify the transport
company immediately. If necessary, request assistance from an installer of photovoltaic systems or from
Zucchetti Centro Sistemi S.p.A. Transport of the equipment, especially by road, must be carried out with
vehicles suitable to protect the components (in particular, electronic components) against violent knocks,
humidity, vibrations, etc.
Electrical connections
Please pay attention to the electrical regulations on accident prevention when dealing with photovoltaic
inverters.
Before connecting the mains power, be sure to disconnect the photovoltaic
modules by disconnecting all the DC switches of the generator. When exposed
to the sun, the photovoltaic panels produce a voltage that can be dangerous!
Danger
All installation operations must be carried out by a professional electrician,
who must:
Be prepared.
Carefully read this manual and understand its contents.
Warning
Before connecting the inverter to the grid, make sure that all the necessary
permits have been obtained from the local grid operator and that all the
electrical connections are made by a professional electrician.
Attention
Do not remove the information label or open the inverter.
Otherwise, ZCS will not provide any warranty or maintenance.
Note

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Operation
Contact with the electrical grid or the terminal of the equipment may cause
electrocution or fire!
Do not touch the terminal or the conductor connected to the electrical grid.
Follow all the instructions and safety requirements relating to the mains
connection.
Danger
Some internal components reach very high temperatures when the inverter
is in operation. Wear protective gloves!
Attention
Maintenance and repair
Before carrying out any repairs, disconnect the inverter from the mains
network (AC side) and from the photovoltaic system (DC side).
After switching off the AC and DC switches, wait 5 minutes before carrying
out any repairs or maintenance on the inverter!
Danger
The inverter should start working again after any faults have been fixed. For
any repairs, contact your local authorised service centre;
Do not disassemble the internal components of the inverter without
permission. This will void the warranty. Zucchetti Centro Sistemi S.p.A. shall
not be responsible for any damage or loss caused by these actions.
Attention
EMC/Noise Level
Electromagnetic compatibility (EMC) refers to that on electrical equipment functions in a given
electromagnetic environment without any trouble or error, and impose no unacceptable effect upon the
environment. Therefore, EMC represents the quality characters of an electrical equipment.
The inherent noise-immune character: immunity to internal electrical noise
External noise immunity: immunity to electromagnetic noise of external system
Noise emission level: influence of electromagnetic emission upon environment
Electromagnetic radiation from inverter may be harmful to health!
Please do not continue to stay away from the inverter in less than 20cm
when inverter is working
Danger

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1.2. Symbols and icons
Safety signals
High voltage of inverter may be harmful to health! Only qualified personnel
can operate the product.
Keep this product out of the reach of children.
Danger
Pay attention to possible burns due to hot parts.
Only touch the screen or press the keys while the inverter is in operation.
Caution
The PV strings should be connected to the ground in accordance with the
local regulations!
To ensure the safety of the system and people, the inverter and
photovoltaic strings must be securely connected to the ground.
Attention
Ensure the correct DC input voltage; which must be below the maximum
allowable DC voltage. Overvoltage can cause permanent damage to the
inverter or other faults which are not covered by the warranty!
Warning
Symbols on the inverter
Some safety symbols are located on the inverter. Read and understand the contents of the symbols before
installing the inverter.
Residual voltage may be present on the inverter! Before opening the inverter,
wait 5 minutes to ensure that the capacitors are completely discharged.
Beware of high voltage
Beware of high temperatures
Complies with the European Standards (CE)
’Smin"“’"
There is residual voltage in the inverter! Before opening the equipment,
wait five minutes to ensure that the capacitance has been completely
discharged.
Be careful of high voltage.
Be careful of high temperature.
Complies with European standards.
Ground connection point.
This indicates the allowed temperature range.
This indicates the degree of protection of the equipment according to

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Ground connection point
Read this manual before installing the inverter.
Indication of the allowable temperature range
Positive and negative polarities of the input voltage (DC).
RCM (Regulatory Compliance Mark).
The product complies with the requirements of the applicable Australian
standards.

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2. Product features
General information in this chapter
Product overview
The field of use and overall dimensions of the 3PH 250KTL-255KTL-HV inverters are indicated in this
section.
Description of functions
It describes how the 3PH 250KTL-255KTL-HV inverters and their internal operating modules work.
Efficiency curve
Describes the efficiency curves of the inverter.
2.1. Product presentation
Field of use
The 3PH 250KTL-255KTL inverters are grid-connected photovoltaic inverters equipped with 8-12 MPPT,
capable of converting the direct current generated by the photovoltaic strings into three-phase sine wave
alternating current and feeding the energy to the public electricity grid. An AC circuit breaker must be used
as a disconnecting device and must always be easily accessible.
Figure 2 –Grid-connected photovoltaic system
The 3PH 250KTL-255KTL-HV may only be operated with PV arrays (photovoltaic module and cabling) for
on grid condition. Do not use this product for any other or additional purposes. Any damage or property loss
due to any use of the product other than described in this section, Zucchetti Centro Sistemi will not take the
responsibility. DC input of the product must be PV module, other source such like DC sources, batteries will
against the warranty condition and ZCS will not take the responsibility.

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Supported grid type
Dimensions description
• Overall dimensions: L x W x H = 1100.5 mm x 713.5 mm x 368 mm
Figure 3 –Front, side and back view of the inverter and bracket

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•Labels on the inverter
Figure 4 –Do not remove the label on the side of the inverter
2.2. Description of functions
The DC voltage generated by the PV modules is filtered through the input board before entering the power
board. The input board also has the function of detecting the insulation impedance and the DC input
voltage/current. The power board converts the DC power into AC power. The current converted into AC is
filtered through the output board and is then fed into the grid. The output board also has the function of
measuring the grid and GFCI voltage/current and acts as an output insulation relay. The control board
provides the auxiliary power supply, controls the operating status of the inverter and shows it on the
display. The display also shows the error codes when the inverter is not functioning properly. At the same
time, the control board can activate the protection relay in order to protect the internal components.

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Electrical block diagram
AZZURRO 3PH 250KTL-255KTL-HV has 16-24 DC input strings. 8-12 MPPT trackers that converters the
direct current of PV array to grid-compliant, three phase current and feeds in into the utility grid. Both DC
and AC side has Surge Protection Device (SPD).
Figure 5 –Block diagram of the 3PH 250KTL-255KTL inverters

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Inverter functions
A. Energy management unit
Remote control to start/ shunt down inverter through an external control.
B. Feeding reactive power into the grid
The inverter is able to produce reactive power thus to feed it into the grid through the setting of the phase
shift factor. Feed-in management can be controlled directly by the grid company through a RS485 interface.
C. Limited the active power fed into the grid
If enable the limited of active power function, inverter can limit the amount of active power fed into the grid
to the desired value (expressed as percentage).
D. Self-power reduction when grid is over frequency
When the grid frequency exceeds the limit set, the inverter reduces the power in order to ensure the
stability of the grid.
E. Data transmission
The inverter (or a group of inverters) can be monitored remotely via an advanced communication system
based on RS485 interface, via external data loggers, via Wi-Fi, GPRS or Ethernet.
F. Software update
USB interface for uploading the firmware, remotely uploading is available.
G. PID （optional function）
The PID effect can be recovered at night to protect the PV modules.
H. H. AFCI (optional function)
When the DC connector is not assembled in place, it is easy to cause arcing or overheating of the connector.
This function can detect whether there is a fault arc at the input end of the inverter. When an arc occurs, the
inverter stops grid connection and gives an alarm reminder, so as to build a safe barrier for the whole
system.
2.3. Module protection
A. Anti-islanding
The inverter is equipped with a protection system that automatically shuts down the system during power
outages. This is called an “anti-islanding” system. This protects electrical workers when they are trying to
repair lines on the grid, in compliance with the applicable national laws and regulations.
B. RCMU
The inverters are equipped with a redundancy on the reading of the ground leakage current, on both the
direct and alternating current sides. The ground leakage current is measured simultaneously and
independently by two different processors: it is sufficient for one of the two to detect a fault in order to
trigger the protection, resulting in separation from the grid and shutdown of the operation.
C. Grid monitoring
Continuous monitoring of the grid voltage to ensure that the voltage and frequency values stay within the
operating limits.

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D. Internal protection of the inverter device
The inverter has all kinds of internal protections to protect the device and internal components when
abnormal situations occur on the grid or DC input line.
E. Ground fault protection
The inverter must be used with photovoltaic modules connected with “floating” connections, i.e. with
positive and negative terminals that are not grounded. An advanced ground fault protection circuit
continuously monitors the ground connection and disconnects the inverter when a ground fault is detected.
The ground fault condition is indicated by a red LED on the front panel.

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2.4. Efficiency and derating curves
Efficiency curve of ZCS Azzurro for the 3PH 250KTL-255KTL-HV family
Figure 6 –Efficiency curve for ZCS Azzurro 3PH 250KTL-HV inverters
Figure 7 –Efficiency curve for ZCS Azzurro 3PH -255KTL-HV inverters

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3. Inverter Storage
If inverter is not installing immediately, storage condition need meet below requirements:
Place inverter into the original package and leave desiccant inside, sealed tight with taps.
Keep the storage temperature around -40℃～70℃, Relative humidity 0～95%, no condensation.
Storage temperature and humidity
The maximum stacking layer number cannot exceed 4 layers.
If the inverter be storage for more than half years, the inverter needs to be fully examined and
tested by qualified service or technical personnel before using.