ZUCCHETTI 3PH 25KTL-50KTL-V3 User manual

Identification: MD-AL-GI-00 Rev. 1.0 of 21/07/2021
- Application:
GID
Zucchetti Centro
Sistemi S.p.A. - Green Innovation Division
Via Lungarno, 248
- 52028 Terranuova Bracciolini - Arezzo, Italy
tel. [phone]
- fax. [phone]
Reg. Pile IT12110P00002965 - Share Capital € 100,000.00 fully paid up
AR Company Reg. no. 03225010481
- REA AR no. 94189
ISO 9001 Certified Company
- Certificate no. 9151 - CNS0 - IT-17778
Grid-connected inverter
3PH 25KTL-50KTL-V3
User Manual

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Identification: MD-AL-GI-00
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User’s Manual 3PH 25KTL-50KTL-V3
Rev.
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Table of Contents
1. Preliminary safety instructions ..............................................................................................................................................................8
1.1. Safety instructions ....................................................................................................................................................................8
1.2. Symbols and icons..................................................................................................................................................................12
2. Product features .........................................................................................................................................................................................14
2.1. Product presentation............................................................................................................................................................14
2.2. Description of functions ......................................................................................................................................................18
2.3. Electrical block diagram......................................................................................................................................................19
2.4. Efficiency and derating curve............................................................................................................................................20
3. Installation....................................................................................................................................................................................................21
3.1. Installation process ...............................................................................................................................................................21
3.2. Checks before installation...................................................................................................................................................22
3.3. Installation tools.....................................................................................................................................................................23
3.4. Installation position ..............................................................................................................................................................26
3.5. Moving the 3PH 25KTL-50KTL-V3 inverter................................................................................................................28
3.6. Installing the 3PH 25KTL-50KTL-V3 inverter............................................................................................................29
4. Electrical connections..............................................................................................................................................................................30
4.1. Electrical connections ..........................................................................................................................................................31
4.2. Connecting PNGD cables (grounding) ...........................................................................................................................32
4.3. Connecting the DC input power cables .........................................................................................................................33
4.4. Connecting the AC output power cables.......................................................................................................................39
4.5. Connecting the communication cables .........................................................................................................................42
5. Commissioning the inverter..................................................................................................................................................................46
5.1. Safety inspection before commissioning......................................................................................................................46
5.2. Starting the inverter..............................................................................................................................................................46
6. Operating interface ...................................................................................................................................................................................48
6.1. Operating panel and display..............................................................................................................................................48
6.2. Main interface ..........................................................................................................................................................................49

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6.3. Main menu.................................................................................................................................................................................53
6.4. Updating Inverter Software ...............................................................................................................................................59
7. Troubleshooting and maintenance ....................................................................................................................................................61
7.1. Troubleshooting......................................................................................................................................................................61
7.2. Maintenance .............................................................................................................................................................................74
7.3. Fan Maintenance.....................................................................................................................................................................75
8. Uninstalling ..................................................................................................................................................................................................76
8.1. Uninstallation steps...............................................................................................................................................................76
8.2. Packaging ...................................................................................................................................................................................76
8.3. Storage ........................................................................................................................................................................................76
8.4. Disposal ......................................................................................................................................................................................76
9. Technical specifications ..........................................................................................................................................................................77
10. Monitoring system...........................................................................................................................................................................78
10.1. External Wi-Fi adapter.........................................................................................................................................................78
10.1.1. Installation ................................................................................................................................................................................78
10.1.2. Configuration ...........................................................................................................................................................................79
10.1.3. Verification................................................................................................................................................................................88
10.1.4. Troubleshooting......................................................................................................................................................................92
10.2. Ethernet adapter.....................................................................................................................................................................97
10.2.1. Installation ................................................................................................................................................................................97
10.2.2. Verification................................................................................................................................................................................99
10.2.3. Troubleshooting................................................................................................................................................................... 101
10.3. 4G adapter .............................................................................................................................................................................. 102
10.3.1. Installation ............................................................................................................................................................................. 102
10.3.2. Verification............................................................................................................................................................................. 105
10.4. Datalogger .............................................................................................................................................................................. 108
10.4.1. Preliminary notes on how to configure the datalogger ...................................................................................... 108
10.4.2. Electrical connections and configuration..................................................................................................................109
10.4.3. ZSM-DATALOG-04 AND ZSM-DATALOG-10 DEVICES .......................................................................................... 112
10.4.4. WI-FI CONFIGURATION.................................................................................................................................................... 112
10.4.5. Ethernet configuration...................................................................................................................................................... 112

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10.4.6. Checking that the datalogger has been configured correctly........................................................................... 119
10.4.7. ZSM-RMS001/M200 and ZSM-RMS001/M1000 Devices .................................................................................. 122
10.4.7.1. Mechanical description and Datalogger interface....................................................................................... 122
10.4.7.2. Connecting the Datalogger to the inverters.................................................................................................... 123
10.4.7.3. Internet connection via Ethernet cable............................................................................................................ 123
10.4.7.4. Connecting the power supply and battery pack to the Datalogger......................................................123
10.4.7.5. Connecting the LM2-485 PRO cell irradiance and temperature sensor to the datalogger ........ 124
10.4.8. Configuring the Datalogger ............................................................................................................................................. 125
10.4.8.1. Configuring the Datalogger on the ZCS Azzurro portal............................................................................. 127
10.4.8.2. Network configuration............................................................................................................................................ 128
10.4.9. Local monitoring.................................................................................................................................................................. 129
10.4.9.1. Requirements for installation of local monitoring ...................................................................................... 129
10.4.9.2. Features of local monitoring................................................................................................................................. 130
11. Warranty terms and conditions.............................................................................................................................................. 131

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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 at 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
The following toll-free number is available for the Italian territory: 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 AZZURRO inverters:
3PH 25KTL-V3 / 3PH 30KTL-V3 / 3PH 33KTL-V3 / 3PH 36KTL-V3 / 3PH 40KTL-V3 / 3PH 45KTL-V3 /
3PH 50KTL-V3
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

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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.
Note

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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
Installation of 3PH 25KTL-50KTL-V3 on-grid inverter must conform with laws, regulations, codes and
standards applicable in the jurisdiction.
Before installing and adjusting the produce, please read all of instructions, cautions and warnings in this
manual
Before connecting the product to the electrical utility grid, contact the local utility company for allowance.
Also, this connection must be made only by qualified electrician.
If the failure persists, please contact the nearest authorized maintenance center. If you don't know which
service center is closest to you, please contact your local distributor. Don't repair the product by yourself,
which may lead serious injury or damage.
Qualified personnel
When inverter is working, it contains lethal voltages and went hot in some area. Improper installation or
maloperation could cause serial damage and injury. To reduce the risk of personal injury and to ensure the
safe installation and operation of the product, only a qualified electrician is allowed to execute
transportation, installation, commissioning and maintenance. Zucchetti Centro Sistemi S.p.A. does not take
any responsibility for the property destruction and personal injury because of any incorrect use.
Label and Symbols
3PH 25KTL-50KTL-V3 has type label attach the side of product which contact important information and
technical data, the type label must permanent attached to the product.
3PH 25KTL-50KTL-V3 has warming symbol attached the product which contact information of safety
operation. The warming symbol must permanent attached to the product.

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Installation location requirement
Please install the inverter according to the following section. Place inverter in an appropriate bearing
capacity objects (such as solid brick wall, or strength equivalent mounting surface, etc.) and make sure
inverter vertical placed. A proper installation location must have enough space for fire engine access in
order for maintenance if faulty occur. Ensure the inverter is installed in a wall ventilated environment and
have enough air-cooling cycle. Air humidity should less than 90%.
Figure 1 – Do not lose or damage this manual
Transportation Requirement
Inverter is in the good electrical and physical condition when it ship out from factory. During transport,
inverter must be placed in its original package or other proper package. Transportation company should
responsible for any damage during transport period.
If you find any packing problems that may cause the damage of inverter or any visible damage, please notice
the responsible transportation company immediately. You can ask your installer or Zucchetti Centro Sistemi
S.p.A. for help is necessary.
Electrical Connection
Please comply with all the current electrical regulations about accident prevention in dealing with the
current inverter.

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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
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

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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
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.
After disconnect with the DC side, there is a residual voltage in the inverter,
operator should wait for 5 minutes to ensure the capacitor is completely
discharged.
Beware of high voltage

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Beware of high temperatures
Complies with the European Standards (CE)
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).

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2. Product features
General information in this chapter
Product description and dimensions
The field of use and overall dimensions of the 3PH 25KTL-50KTL-V3 inverters are indicated in this section.
Description of functions
Describes how the 3PH 25KTL-50KTL-V3 inverters and their internal operating modules work.
Efficiency curve
Describes the efficiency curves of the inverter.
2.1. Product presentation
Field of use
3PH 25KTL-50KTL-V3 is a transformer-less on grid PV inverter, that converters the direct current of the PV
panels to the grid-compliant, three-phase current and feeds into the utility grid.
Figure 2 – Grid-connected photovoltaic system
3PH 25KTL-50KTL-V3 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 S.p.A. 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 Zucchetti Centro Sistemi S.p.A. will not take the responsibility.
Intended networks
3PH 25KTL-50KTL-V3 configurations. For the TT type of electricity grid，the voltage between neutral and
earth should be less than 30V. inverters are compatible with TN-S, TN-C, TN-C-S, TT, IT grid.

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25~50KTLX-G3
L1
L2
L3
N
PE
PE
TN-S
Transformer
25~50KTLX-G3
L1
L2
L3
PEN
PE
TN-C
Transformer
25~50KTLX-G3
L1
L2
L3
N
PE
PE
TN-C-S
Transformer
25~50KTLX-G3
L1
L2
L3
N
PE
TT
Transformer
25~50KTLX-G3
L1
L2
L3
PE
IT
Transformer
Figure 3 – Wiring diagrams of grid types on which the 3PH 25KTL-50KTL-V3 inverter can be installed
Product Dimensions
The choice of optional parts of inverter should be made by a qualified technician who knows the installation
conditions clearly.
Dimensions Description
LxWxH=585*480*220mm
3PH 25-50KTL-V3
3PH 25-50KTL-V3
3PH 25-50KTL-V3
3PH 25-50KTL-V3
3PH 25-50KTL-V3

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Figure 4 - Front, side and back of the inverter
Figure 5 - Bottom view (3PH 25KTL-50KTL-V3)
Note: 3PH 25KTL-50KTL-V3 supports 4-channel PV string input.
Figure 6 - Bracket dimensions
480.0
539.0
585.0 231.0
403.0
176.0
126.0 126.0
80.0
4-12.0
8- 10.0
36.0
10.0
2- 7.0

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Function description of inverter box bottom
Figure 7 – Bottom view of the inverter
1. DC switch
2. Breather valve
3. DC positive poles connecters
4. DC negative poles connecters
5. USB Port (for WIFI or Ethernet communication)
6. COM Port (for RS485 communication)
7. AC output
8. Fans
Labels on the equipment
Note: label must NOT be hidden with objects and extraneous parts (rags, boxes, equipment, etc.,); they must
be cleaned regularly and kept visible at all times.
1 2 3 4 6
5 7
8

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Figure 8 – Do not remove the label on the side of the inverter
2.2. Description of functions
DC power generated by PV arrays is filtered through Input Board then enter Power Board. Input Board also
offer functions such as insulation impedance detection and input DC voltage/ current detection. DC power is
converted to AC power by Power Board. AC power is filtered through Output Board then AC power is fed
into the grid. Output Board also offer functions such as grid voltage/ output current detection, GFCI and
output isolation relay. Control Board provides the auxiliary power, controls the operation state of inverter
and shows the operation status by Display Board. Display Board displays fault code when inverter is
abnormal operation conditions. At the same time, Control Board can trigger the replay to protect the
internal components.
Function Module
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 APP or through a RS485 interface.

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C. Limited the active power fed into 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
If grid frequency is higher than the limited value, inverter will reduce the output power to ensure the
grid stability.
E. Data transmission
Inverter or a group of inverters can be monitored remotely through an advanced communication
system based on RS485 interface or via USB port.
F. Software update
USB interface for uploading the firmware, remotely uploading by using USB acquisition stick
(WIFI/Ethernet/GPRS) is also available.
2.3. Electrical block diagram
+
+
-
-
Input
EMC
Circuit
MPPT
Circuit 1
MPPT
Circuit 2
AC
Inverter
Circuit
Output
Filter
Circuit
Relay
Protect
Circuit
Output
EMC
Circuit
R
S
T
PE
Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ
N
PV1
PV
Input
Port
+
-
-
PV4
+
-
-
PV3
+
-
-
PV2
+
+
+
MPPT
Circuit 3
MPPT
Circuit 4
Figure 9 – Schematic diagram (take 50KW for example)