Autarco PELD-MII User manual

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IM-S2.PELD-MII-EN-V1.3 Manual
Installation and Operation Manual
Power Export Limitation Device PELD-MII

Contact Information
Autarco Group B.V.
Schansoord 60
5469 DT Erp
The Netherlands
www.autarco.com
[email protected]
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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Table of Contents
1. Introduction 5
1.1 Read this first 5
1.2 Target Audience 5
1.3 Intended Application 6
2. Preparation 7
2.1 Safety instructions 7
3 Overview 8
3.1 Front Panel Display 8
3.2 LED Status Indicator Lights 8
3.3 Keypad 8
3.4 LCD 8
4 Installation 9
4.1 Install location 9
4.2 Mounting the EPM 9
4.3 Electrical Connections 11
4.4 Make the Grid input cable 13
4.5 Make RS485 cable (COMM-INV port) 14
4.6 Connect ground cable. 15
4.7 Connect and fix the CT 15
4.8 Connect the grid input to the distribution box. 16
4.9 Multi inverter connection 16
4.10 Monitoring 17
5 Commission and decommission 18
5.1 Commissioning 18
5.2 Decommissioning 18
6 Operation 19
6.1 Introduction 19
6.2 Main Menu 19
6.2.1 Information 20
6.2.2 Lock Screen 20
6.2.3 Settings 21
6.2.4 Set Time 21
6.2.5 Set Address 21
6.3 Advanced Info-Technicians Only 21
6.3.1 Inverter Power 22
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6.3.2 CT connect status 22
6.3.3 Software 22
6.3.4 Model Inverter 22
6.3.5 Communication data 23
6.4 Advanced Settings-Technicians Only 23
6.4.1 Inverter Quantity Set 23
6.4.2 Backflow Power 23
6.4.3 Set CT Parameter 24
6.4.4 Failsafe ON/OFF 24
6.4.5 Failsafe settings 24
6.4.6 Backflow Work Mode 25
6.4.7 PELD ON/OFF 26
6.4.8 System Upgrade 26
6.4.9 Set Password 26
6.4.10 Restore Settings 27
6.4.11 Set EPM Regulator 27
8 Set Inverters 28
9 Troubleshooting 29
9.1 Checklist 29
9.2 Other Troubleshooting 29
10 Specifications 30
10.1 Single phase PELD specifications 30
10.2 Three-phase PELD specifications 31
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1. Introduction
1.1 Read this first
This manual contains important information for use during installation and maintenance of the Power
Export Limit Device (PELD) with Autarco’s inverters.
To reduce the risk of electrical shock, and to ensure the safe installation and operation, the following
safety symbols appear throughout this document to indicate dangerous conditions and important safety
instructions.
1.2 Target Audience
This manual is intended for anyone who uses Autarco inverters in conjunction with a Power Export
Limiting Device (PELD). 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.
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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.
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”.

1.3 Intended Application
This manual applies to the following products;
●S2.PELD10-MII For limiting up to 10 inverters at a time
●S2.PELD80-MII For limiting up to 80 inverters at a time
Please note that all current inverter models excluding the UX Series are capable of internal power export
limitation using an external current clamp or consumption meter. The internal PELD functionality is only
applicable for systems with one inverter. Please see the relevant inverter series manual for more
information. External power export limitation with the help of the PELD is possible with all inverters.
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2. Preparation
2.1 Safety instructions
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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DANGER! Do not touch any internal components whilst the inverter is in operation.
DANGER! Do not stand close to the PELD during severe weather conditions such as lighting, etc.
WARNING! The PELD may become hot during operation; please don’t touch the heat sink or
peripheral surface during or shortly after operation.
NOTICE! Do not directly connect 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.
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 an authorized repair facility for any maintenance
or repairmen.

3 Overview
3.1 Front Panel Display
Figure 3.1: Front display
3.2 LED Status Indicator Lights
There are three LED status indicator lights at the front panel of the inverter, as shown in figure 3.1.
Figure 3.2: Status indicator lights
3.3 Keypad
There are four keys at the front panel of the PELD (from left to right): ESC, UP, DOWN and ENTER keys. The
keypad is used for:
●Scrolling through the displayed options (the UP and DOWN keys);
●Access to modify the adjustable settings (the ESC and ENTER keys).
3.4 LCD
The two-line Liquid Crystal Display (LCD) is located at the front panel of the PELD, which shows the
following information:
●PELD operation status and data
●Service messages for operators
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Light
Status
Description
POWER
ON
Export Device power on
OFF
Export Device power off
OPERATION
ON
Communication with inverter
OFF
No communication with inverter
ALARM
ON
Backfeed power over 100W or inverter fault.
OFF
No alarm

4 Installation
4.1 Install location
To select a location for the PELD, the following criteria should be considered:
●The temperature of the PELD can reach up to 75℃.
●The PELD is designed to work in extended temperature range from -25℃ to 60℃.
●The PELD should be installed with a minimum of 300mm clearance from other devices.
4.2 Mounting the EPM
Attach the mounting plate horizontally on to the wall. Then mark A, B and C to fix the mounting plate
(see Figure 4.1).
Figure 4.1: Bracket
Drill threeφ8 holes and insert expandable plugs into the holes which make the bracket alignment. After
that fix the bracket on the wall.(see Figure 4.2). Make sure that the wall is flat.
Figure 4.2: Fix the bracket on the wall
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Hang the PELD in the bracket by the steps below (see figure 4.3)
Figure 4.3: Hang the PELD in the bracket
Fix the two screws at the side of the bracket to secure the PELD. Do not overtighten the screws. See figure
4.4.
Figure 4.4: Fix the two screws
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4.3 Electrical Connections
The PELD is designed for electrical connection without removing the cover. The meaning of the
symbols located at bottom of the PELD is listed below:
Figure 4.5: Three-phase system with Autarco S2.PELD-MII
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Grid
AC voltage sampling terminal
CT1/2/3
AC current sampling terminals (CT1 only when 1 phase)
Comm_INV
Communication with Autarco inverter
Communication
Connection for Monitoring Device or Software Upgrade Stick

Figure 4.6: Three phase system with Autarco PELD
Figure 4.7: Single phase system with Autarco PELD
Note that the PELD shall be installed near the measuring point for current/voltage. The CT cables and grid
input cable are usually limited in length. In order to shorten the length of CT and grid input cable, the PELD
is recommended to be installed near the customer distribution box.
The PELD is delivered without CT’s. These must be ordered separately for the current range that has to be
measured.
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4.4 Make the Grid input cable
●Measure the distance from PELD to power distribution box. Choose the proper cable for grid
input. Use a 5-core cable for Autarco 3 phase PELD and a 3-core cable for Autarco single phase
PELD. Check carefully the connections in the connector and make sure the cables inside the
connector cannot touch each other.
●For three phase inverter installation connect L1, L2, L3 to pin 1, 2, 3 and connect N to pin4,
connect PE to (see figure 4.8).
●For single phase installation, connect L, N and PE and N to pin4, connect PE to (see figure4.7).
●Strip the end of cable to 3mm (see Figure 4.8)
●Feed the cable through the washer and use a suitable screwdriver to fix the wire to the connector
(see Figure 4.9)
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4.5 Make RS485 cable (COMM-INV port)
●Refer to figure 4.16, the RS485 terminals for inverter and PELD are already assembled. RS485A is
connected to yellow and RS485B to blue wire. Suggested RS485 cable: preferred 0.5-1.0mm2.
●Refer to figure 4.17, connect communication cable between inverter with PELD, and then measure
the distance from PELD to inverter. Use proper cable for RS485 connection 0.5-1.0mm2
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●Follow step1 to assemble 2 connectors to each end of the cable. If the RJ45 comms ports are used
on the inverter, you also may use standard Ethernet cables for connection from one inverter to
the second one and so on. Then you only need to assemble one cable from the last inverter to
PELD.
●Make sure RS485A and RS485B connect to the same pin on each inverter !
4.6 Connect ground cable.
●The case of PELD is metal and must be grounded.
●Measure the distance from PELD to ground point, then prepare the proper grounding cable. The
ground cable may be 2.5-4 mm.
●Use an O type terminal as an accessory to connect the ground cable to PELD. (Figure 4.18)
Figure 4.18 Assemble ground cable
4.7 Connect and fix the CT
In order to measure the backflow current, the CT’s shall be installed just behind the customer’s main
switch (see figure 4.5).
Notice:
If the CT’s are installed in the wrong place or direction, the PELD will not work correctly.
●Switch off the main switch, disassemble line cable.
●Feed the cable through the CT or use CT’s that can be split. The direction of CT is very important.
Refer to Figure 4.19, the side with words should face downstream. Reconnect the line cable to the main
switch.
Figure 4.19 CT current pointing to inverter
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●To prevent overheating, always make sure the secondary side of the CT’s is connected to the PELD
before switching on power.
In figure 4.20 a few examples of Current Transformers can be found. It is possible to select your own brand
and type as long as they meet the requirements and safety standards.
Figure 4.20: CT Ratio
4.8 Connect the grid input to the distribution box.
The grid input cable can be connected at the inverter grid breaker or an independent breaker.
Please follow figure 4.5 system diagram to connect grid input cable to the main switch.
The cable sequence must match the PELD grid terminal sequence.
4.9 Multi inverter connection
Please follow figure 4.5 system diagram to connect multiple-inverters. PELD can control maximum 10
inverters.
They may be different models. The firmware of the inverter must support EPM use.
The inverter RS485 address must be set to different values: please set address from 01 to 09.
Before starting up the inverter please follow 6.5.1 to set the inverter number in PELD.
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Reminder: Set the CT Sampling Ratio in Advanced Settings; Set CT Parameter
Notice:
Do not connect the grid input cable to the load breaker, it could cause inverter loss of control
when the load breaker trips.
NOTICE! Do not directly connect 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.

4.10 Monitoring
Inverters that are connected to the PELD can be monitored by Autarco Ethernet/WiFi/GPRS stick or box.
WiFi/GPRS stick is used for single inverter monitoring.
Multiple-inverters must use WiFi/GPRS box to monitor via the PELD. Digital Monitoring Sticks (with “-D”
in product code) will have capability to monitor multiple inverters via the peld after Q1 2021.
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Notice: When an inverter is connected to PELD, no other monitoring device is allowed
to be connected to the inverter.

5 Commission and decommission
5.1 Commissioning
●Connect the CT connectors, grid input terminal, RS485 terminal (INV) and monitoring device (if
needed) to the PELD. Connect the other end of RS485 cable to the inverter(s).
Figure 5.1 Cable connections
●Close the breaker of the grid input and start up PELD
●The power LED(red) will light up. After the LCD-screen has started up, press up or down check if
the active power is positive or 0. If the active power is negative, please check the direction of the
CT’s.
●Set inverter number for multi-inverters connection.
●Follow the instructions of the inverter to start up the inverter. If the PELD communicates with the
inverter successfully, the green LED will light.
●The default allowed backflow power is 0. Please follow 6.5 to change the allowed backflow power
if needed.
5.2 Decommissioning
In order to avoid the backflow power to the grid, please stop the inverter before stopping the PELD.
●Turn off the grid breaker of the inverter.
●Turn off the PV input breaker.
●Turn off the grid input breaker of PELD.
●Disconnect all cables of PELD, disassemble PELD after 5mins
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6 Operation
6.1 Introduction
During normal operation, the display alternately shows the power of the grid side and the operation
Status. Screens can also be scrolled manually by pressing the UP and DOWN keys. Press the ENTER key to
access to the Main Menu
There are 4 status messages:
●Normal: The system works normally.
●RS485 AllFail: PELD has lost communication with ALL inverters
●CT FailSafe: Current Sensor has failed.
●RS485 Fail: PELD has lost communication with one or more inverters
If you see a fault message, check all wiring and make sure RS485 + and – are wired the same on all
inverters.
6.2 Main Menu
There are four submenus in Main Menu (see figure 6.1)
●Information
●Settings
●Advanced Info.
●Advanced Settings
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6.2.1 Information
Autarco PELD main menu provides access to operational data and information. The information is
displayed by selecting ‘’Information’’ from the menu and then scrolling up or down through the list. See
figure 6.1.
Figure 6.1: Information list
6.2.2 Lock Screen
Pressing the ESC key returns to the Main Menu. Pressing the ENTER key locks (Figure 6.2(a)) or unlocks
(Figure 6.2 (b)) the screen.
Figure 6.2: Locks and Unlocks the screen of LCD
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