Fronius Quick Guide - How to install and commission a Fronius Smart Meter 50kA-3 AU, How to install and commission a Fronius Smart Meter 50kA AU Quick Guide [EN]
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Quick guide:
How to install and commission a
Fronius Smart Meter 50kA-3
* 3-phase Energy Meter
# 43,0001,1478 Fronius Smart Meter 50kA-3
White Paper
© Fronius International
Version 1.0/2016
Fronius reserves all rights, in particular rights of reproduction, distribution and translation.
No part of this work may be reproduced in any way without the written consent of Fronius. It must not be saved, edited,
reproduced or distributed using any electrical or electronic system.
You are hereby reminded that the information published in this document, despite exercising the greatest of care in its
preparation, is subject to change and that neither the author nor Fronius can accept any legal liability. Gender-specific wording
refers equally to female and male form.
(c) Fronius International GmbH / Solar Energy 2016
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Loads
Grid
Fronius
Smart Meter
Loads
PV system
Energy
meter
kW
0,0
1 Scope of use
A smart meter helps to keep track of the energy flow, consumption and production values. By adding an smart
meter you are able to identify and control energy saving potentials and take action in order to increase your
self-consumption rate. This can mean e.g. changing your behaviours like manually shifting your peak
consumption times, integrate energy management / consumer control or even energy storage systems. If an
energy storage system in form of a battery is added to an installation a smart meter is mandatory.
The Fronius Smart Meter 50 kA-3 is an energy meter which can be used with external current transducers. For
this reason, it’s easy to retrofit in electrical installations where grid connections can’t be modified. The Fronius
Smart Meter is an energy meter that works in conjunction with the Fronius Datamanager 2.0. It has to be
connected to the Fronius Datamanager 2.0 which comes built-in to all Fronius SnapINverter (Fronius Galvo /
Primo / Symo / Eco), and can be retrofitted into all other Fronius inverters. Using a ModBus RTU / RS485
communication protocol, the Fronius Smart Meter can be utilised to monitor load and energy data by measuring
current, voltage, energy, reactive power and apparent power in total or per phase.
This document describes how to do install and setup the Fronius Smart Meter 50kA-3, based on the example of
a 3-phase electrical grid.
1.1 Requirements
/ Important! The Fronius Smart Meter cannot be used in combination with the Fronius Datamanager Version 1.
/ The Fronius Datamanager 2.0 requires a software version of V3.3.6-13 or greater.
/ The Fronius Datamanager 2.0 needs to be set up before executing the meter settings. For information on
how to set up the Fronius Datamanager please see the Fronius inverter or the Fronius Datamanager
manual (for Fronius Galvo/Symo/Primo/Eco): http://www.fronius.com/cps/rde/xbcr/SID-DBD64F5C-
18F6818F/fronius_australia/42_0426_0191_EA_388899_snapshot.pdf
1.2 Where to put the Fronius Smart Meter
In ordinary residential installations, in most cases the Fronius Smart Meter will be put into the feed-in path
(Graphic 1). If the PV system is connected to a sub board it’s most likely to achieve the load measurement by
having the meter in the feed-in path. Alternatively, if only a specific consumer branch should be measured, the
Fronius Smart Meter can also be put into the “consumption path”.
Feed-in point
In this setting the solar generation passes through the meter as well as the site load.
Graphic 1: Position of the Fronius Smart Meter
(c) Fronius International GmbH / Solar Energy 2016
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* the termination resistor is
enclosed with the Fronius
Smart Meter
2 INSTALLATION AND COMMISSIONING
2.1 Wiring of the Fronius Smart Meter 50kA-3
In this paper the wiring for 3-phase grids with Neutral (3N3E) is described. The Fronius Smart Meter 50kA-3
can also be used with 1-phase or 2-phase grid systems. For more information concerning these grid types,
please check out the installation manual
http://www.fronius.com/cps/rde/xbcr/SID-C3A503DB9EB48230/fronius_international/42_0410_2169_734957_snapshot.pdf
The installation procedure in this document is as follows:
1. Mount the Fronius Smart Meter on the DIN rail in your switchboard
2. Build up the communication between Fronius Smart Meter and Fronius Datamanager 2.0
3. Hook the external current transducers to each AC phase of the grid
4. Connect the cables for the voltage and fusing
5. Program the transmission ratio into the Fronius Smart Meter
6. Activate the Fronius Smart Meter in the Fronius Datamanager 2.0 web interface
The following circuit diagram gives an overview about the AC and communication cabling:
Graphic 2: Circuit diagram of Fronius Smart Meter 50kA-3
2.2 Communication with the Fronius Datamanager 2.0
To set up the communication between inverter and Fronius Smart Meter the RS485 interface with Modbus RTU
protocol is used. That means to connect three wires only. For a proper bidirectional communication flow (D+ / D) it is mandatory to terminate the bus line with 120 Ω resistors. This is realised by a dip-switch on the Fronius
Datamanager 2.0 and an external termination resistor which has to be connected between Fronius Smart Meter
connectors 33 and 34 manually. The external resistor is delivered with the Fronius Smart Meter.
Please note:
/ Wiring between Fronius Smart meter and inverter should use a CAT5 or CAT6 cable. Important: To be
compliant with the AS3000 standards, it is recommended to have the CAT5/CAT6 cable in a heat shrink
tubing (probably 10mm) when it enters the switchboard part or alternatively use a 240V rated CAT5/CAT6
cable – Clipsal CBUS cable.
/ Connection is a data line for Modbus RTU / RS485 using screw terminals on the meter
/ Connection is a data line for Modbus RTU / RS485 using screw terminals on the Fronius Smart Meter
/ You can use the cable colours of your choice. Please make sure the cables for bidirectional communication “D+”
/ “D-“are a twisted pair!
/ Maximum distance of the cable: 300 m (980 feet)
(c) Fronius International GmbH / Solar Energy 2016
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