Autarco UX-MII-Series User manual

Installation and Operation Manual
Solar Inverters UX-MII-series
© Autarco Group B.V. IM-S2-UX-MII-EN-V2.1
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Contact Information
Autarco Group B.V.
Schansoord 60
5469 DT Erp
The Netherlands
www.autarco.com
[e-mail]
Other Information
This manual is an integral part of the unit. Please read the manual carefully before installation, operation or
maintenance. Keep this manual for future reference.
Product information is subject to change without notice. All trademarks are recognized as the property of their
respective owners.
© Autarco Group B.V.
All rights reserved.
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installation and operation manual
1 Table of contents
1 Introduction 6
1.1 Read this first 6
1.2 Target Audience 6
1.3 Product versions covered by this document 7
2 Preparation 8
2.1 Safety instructions 8
2.2 Package contents 9
2.3 Internal DC switch 9
2.4 Explanations of symbols on inverter 9
3 Product information 10
3.1 Overview 10
3.2 Product identification 10
3.3 Product overview 11
3.4 Safety 12
3.5 Mounting instructions 13
3.6 Safety clearance 14
3.7 Mounting procedure 15
4 Electrical installation 17
4.1 AC connection 17
4.2 DC connections 21
4.3 Commissioning and Decommissioning sequence 22
5 Communication and monitoring 23
5.1 Inverter monitoring connection 25
5.1.1 Monitoring for a single inverter 25
5.1.2 Monitoring for multiple inverters 25
5.1.3 DRM Connection / Logic Interface Connection 26
6 Operation 28
6.1 LED indicator lights 28
6.2 Inverter display 28
6.3 Information 29
6.4 Settings 30
6.5 Advanced info 31
6.6 Advanced Settings 32
6.7 External fan 36
7 Monitoring setup and system registration 36
8 Maintenance 36
8.1 Fan Maintenance 37
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9 Disposal 38
10 Troubleshooting 39
10.1 General 39
10.2 Internal component fault 39
10.3 Grid errors 40
10.4 System and design fault 41
11 Product specifications 42
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installation and operation manual
2 Introduction
2.1 Read this first
This manual contains important information for use during installation and maintenance of the UX-MII-series
Autarco inverter.
To reduce the risk of electrical shock, and to ensure the safe installation and operation of the UX-MII-series
Autarco inverters, the following safety symbols appear throughout this document to indicate dangerous
conditions and important safety instructions.
WARNING! Indicates safety instruction, which if not correctly followed, can result in injury or
property damages.
RISK OF ELECTRIC SHOCK! Indicates safety instructions, which if not correctly followed, could
result in electric shock.
HOT SURFACE! Indicates safety instructions, which if not correctly followed, could result in
burns.
2.2 Target Audience
This manual is intended for anyone who uses Autarco UX-MII-series inverter. Before any further action, the
operators must first read all safety regulations and be aware of the potential danger to operate high-voltage
devices. Operators must also have a complete understanding of this device’s features and functions.
ATTENTION! Qualified personnel means a person with valid license from the local authority in:
●Installing electrical equipment and PV power systems (up to 1000 V).
●Applying all applicable installation codes and using Personal Protective Equipment.
●Analyzing and reducing the hazards involved in performing electrical work.
WARNING! Do not use this product unless it has been successfully installed by qualified personnel in
accordance with the instructions in chapter 4 “Installation”.
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2.3 Product versions covered by this document
The main purpose of this user manual is to provide instructions and detailed procedures for installing, operating,
maintaining, and troubleshooting the UX-MII-series of Autarco inverters which includes the following models:
For 380/400V AC grid connection:
●S2.UX50000(S)-MII
●S2.UX60000(S)-MII
For direct transformer connection at 540 Volt:
●S2.UX60000(S)-HV-MII
●S2.UX70000(S)-HV-MII
The “S2.” in the product code means the product is a grid-tied inverter. If the product has an “S” at the end it
comes with integrated DC switches. The -MII stands for the Mark II series.
The item code or SKU will include an additional number at the end. The final number references the default grid
standard and colour of inverter. For example, S2.UX50000S-MII.1 is the 50kW model with Dutch grid standard as
default, integrated DC switch and Autarco blue cover.
Please keep this user manual available at all times in case of emergency.
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installation and operation manual
3 Preparation
3.1 Safety instructions
DANGER! Do not touch any internal components whilst the inverter is in operation.
DANGER! Do not stand close to the inverter during severe weather conditions such as lighting,
etc.
Make sure you completely cover the surface of all PV arrays with opaque (dark) material before
wiring them or make sure the DC circuit breaker or equivalent DC isolator is disconnected.
This is because photovoltaic (PV) arrays create electrical energy when exposed to light, and could
cause a hazardous condition.
The UX-MII series inverter must only be operated with PV arrays of protection class II, in
accordance with IEC 61730, class A.
WARNING! The PV inverter will become hot during operation; please don’t touch the heat sink or
peripheral surface during or shortly after operation.
NOTICE! Do not directly connect the AC output of the inverter to any private AC equipment. The
PV inverter is designed to feed AC power directly into the public utility power grid.
NOTICE! Do not connect PV array positive (+) or negative (-) to ground – doing so could cause
serious damage to the inverter.
WARNING! The installation, service, recycling and disposal of the inverters must be performed by
qualified personnel in compliance with national and local standards and regulations.
Please contact your dealer to get the information of authorized repair facilities for any
maintenance or repairmen.
Any unauthorized actions including modification of product functionality of any form will affect the validation of
warranty service; Autarco may deny the obligation of warranty service accordingly.
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3.2 Package contents
Autarco UX-MII-series
inverter
Mounting bracket
Incl. screws
MC4 connector
pairs
Instruction manual
3.3 Internal DC switch
Please verify whether your Autarco UX-MII-series inverter is equipped with an internal DC switch. If there is an
internal DC switch the product code will have an “S”. The switch can be found on the bottom of the inverter (see
3.3). If there isn’t an internal DC switch it is important to install an external DC disconnector in order to
completely disconnect the solar PV module strings from the inverter.
3.4 Explanations of symbols on inverter
10 min.
DANGER - HIGH ELECTRIC VOLTAGE
This device is directly connected to the public grid. All work to the inverter shall be
carried out by qualified personnel only. There might be residual currents in the
inverter for up to 10 minutes because of large capacitors present.
ATTENTION
This device is directly connected to electricity DC generators and the public AC
grid.
DANGER – HOT SURFACES
The components inside the inverter will get hot during operation, DO NOT touch
aluminum housing during operating.
ATTENTION
In case of any work to the inverter, always refer to this manual for detailed
product information.
ATTENTION
This device SHALL NOT be disposed of in residential waste. Please go to Chapter 9
“Recycling and Disposal” for proper treatments.
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installation and operation manual
CE MARK
This equipment conforms to the basic requirements of the EU guideline governing
low voltage and electromagnetic compatibility.
4 Product information
4.1 Overview
Autarco UX-MII-series grid tied inverters are state of the art, high efficiency, robust and reliable grid tied inverters
at the best price quality ratio available. They are easy to install and carry a standard 5 year product warranty. Our
rigorous quality control and testing facilities guarantee Autarco inverters meet the highest quality standards
possible. These inverters are the key to our international track record of delivering extremely reliable solar power
solutions.
Key features:
●Maximum efficiency of 98.7%
●5/6 MPPT with wide voltage range
●Low turn off voltage
●High enclosure protection class IP66
●Intelligent redundant fan-cooling
●Standard five year product warranty
●Optional integrated DC switch
●High range of protective functions
For full specifications please see chapter 11 “Product specifications”.
4.2 Product identification
You can identify the inverter by the serial number (S/N) sticker on the side of the inverter. Important electrical
specifications can also be found on the label which can be found on the left side of the inverter housing. Do not
remove the label or the serial number as this voids the product warranty.
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4.3 Product overview
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installation and operation manual
4.4 Safety
DANGER! Do not install the inverter near flammable or explosive items.
WARNING! The installation must be performed by qualified personnel and in compliance with
national and local standards and regulations.
This inverter will be connected to a high voltage DC power generator and AC grid. Inappropriate
installation may jeopardize the life span of the inverter.
The installation site must have good ventilation conditions. Direct exposure to intense sunshine
is not recommended and should be avoided with a shelter or roof. If installed in a dusty or
industrial environment, regular cleaning with a dry brush is recommended. The inverter can be
cleaned with a damp cloth with clean water only.
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4.5 Mounting instructions
●The inverter is suitable for outdoor and indoor installation.
●Vertical installation is recommended, with a maximum inclination of 15⁰ backwards.
●Make sure the mounting wall is strong enough to hold the weight of the inverter.
●The ambient temperature of the installation site should be between -20 ⁰C and +60 ⁰C.
●It is not recommended that the inverter is exposed to direct sunshine.
●Make sure of ample ventilation at the installation site, insufficient ventilation may reduce the
performance of the electronic components inside the inverter and shorten the lifespan of the inverter.
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installation and operation manual
4.6 Safety clearance
Caution! Make sure heat sinks are out of reach of children.
Observe the following minimum clearances to walls:
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4.7 Mounting procedure
Step 1 — The wall bracket has the dimensions below. Please ensure the positions of the holes are
suitable for fitting expansion bolts.
Step 2 — Mount the wall bracket onto the mounting wall with appropriate screws plugs.
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installation and operation manual
Step 3 — Lower the inverter onto the bracket. The screw holes in the wall bracket should align with
the raised convex on the inverter bracket.
Step 4 — Fix the bottom of the inverter to the wall bracket with the M4x9mm screws:
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5 Electrical installation
DANGER! This inverter will be connected to a high voltage DC power generator and AC grid. The
installation must be performed by qualified personnel and in compliance with national and local
standards and regulations
5.1 AC connection
DANGER! Never connect or disconnect the connectors under load.
NOTICE! The AC connection to the electrical distribution grid must be performed only after
receiving authorization from the utility that operates the grid.
NOTICE! Make sure to set the correct grid standard as part of system commissioning, see
chapter 6.6.
The Autarco inverter is equipped with an integrated Residual Current Protective Device (RCPD) and Residual
Current Operated Monitor (RCOM). The RCOM will detect the volume of the leakage current and compare it with
the expected value, if the leakage current exceeds the permitted range, the RCPD will disconnect the inverter
from the AC load.
If regulations in the country of installation stipulate an external Residual Current Device (RCD), you must use a
device with a tripping threshold of 100 mA or more. For the UX-MII series we recommend to use a 300 mA RCD.
A type “A” RCD can be used in accordance with our “Manufacturer’s declaration for usage of residual current
devices”. Contact Autarco for advice.
The AC cable used must be dimensioned in accordance with any local and national directives on cable
dimensions which specify requirements for the minimum conductor cross-section. Cable dimensioning factors
are e.g.: nominal AC current, type of cable, type of routing, cable bundling, ambient temperature and maximum
specified line losses.
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installation and operation manual
In the table below you find the recommended AC-cable. Make sure that the resistance of the cable is lower than
1.5 ohm.
Strip the AC cable off for 300 mm and then strip individual strands at S2 length. S2 must be 2..3 mm longer than
S1. Use M10 crimping terminal. Strip the insulation of the wire past the cable crimping area of the OT terminal,
then use a hydraulic crimp tool to crimp the terminal. The crimped portion of the terminal must be insulated
with heat-shrinkable tube or insulating tape.
If chosing aluminum alloy cable, you must use copper aluminum (bi-metallic) transfer terminal and anti-oxidant
grease in order to avoid direct contact between copper bar and Aluminum alloy cable. (Select a copper
aluminum transfer terminal based on your cable specification).
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Step 1 — Remove the plastic AC terminal cover and take the metal AC terminal cover out of the box.
Step 2 — Insert the cable through the nut, sheath into the AC terminals. Tighten the screws on the
terminal block. The required torque is 10~20Nm.
Step 3 — For the 50 and 60 kW versions 3 phase, neutral and ground (PE) shall be used
For the High Voltage (HV) inverter version a 4 wire cable (3 phase + PE) must be used.
Step 4 — Push the AC terminal cover up and fix it in place.
NOTICE! It is important that the AC wires are connected to the right terminals as indicated by
the “L”, “N” and “Earth” symbols on each AC connector.
In the Netherlands and most other countries a second protective conductor is required as a
matter of principle. In each case, observe the applicable regulations for the site.
The AC connection to the electrical distribution grid must be performed only after receiving
authorization from the utility that operates the grid.
Always use separate fuses for consumer load. The inverters must be installed on a separate group. Use dedicated
circuit breakers with load switch functionality for load switching.
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installation and operation manual
The selection of the mains circuit breaker rating depends on the wiring design (wire cross- section area), cable
type, wiring method, ambient temperature, inverter current rating etc. Derating of the circuit breaker rating may
be necessary due to self-heating or if exposed to heat.
S2.UX50000S-MII
S2.UX60000S-MII
S2.UX60000S-HV-
MII
S2.UX70000S-
HV-MII
Max. AC current (A)
83.6
100.3
79.4
92.6
Recommended fuse type gL/gG
or comparable automatic circuit
breaker rating (A)
100
125
80
100
DANGER! No consumer load should be applied between the mains circuit breaker and the
inverter.
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5.2 DC connections
Please always use the MC4 connectors from the inverter box to connect strings to the inverter.
DANGER! Never connect or disconnect the connectors under load.
UX-MII series inverters have five or six MPP trackers. The DC characteristics of each model are shown in the table
below:
Inverter
MPP tracker
Max DC power
Max DC voltage
Max. DC current per
MPPT
S2.UX50000S-MII
5
55kW
1100V
32A
S2.UX60000S-MII
6
66kW
S2.UX60000S-HV-
MII
6
66kW
S2.UX70000S-HV-
MII
6
77kW
DANGER! Do not connect the strings with an open circuit voltage greater than the Max DC voltage
of the inverter.
To connect the PV generator to the inverters we use 4mm² or 6mm² PV cable and MC4
connectors. For details on how to assemble MC4 connectors please refer to our MC4
connector manual.
DANGER! For protection against electric shock, MC4 connectors must be isolated from the PV
array while being assembled or disassembled.
DC connections must not be unplugged while under load. They can be placed in a no-load state
by switching off the DC/AC converter or breaking the DC circuit interrupter. Plugging and
unplugging while under voltage is permitted. If the DC is connected in a reverse way or the
inverter is faulty or not working properly, it is NOT allowed to turn off the DC-switch as it may
damage the inverter. In this case make sure to bring the current in all strings below 0.5 A before
switching off the DC-switch e.g by covering one panel in all 4 strings.
CAUTION! MC4 connectors are watertight IP67 but cannot be used permanently under water.
Do not lay the MC4 connectors on the roof surface.
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