FRO­NIUS Smart Meter 50kA-3 User manual

/ Perfect Charging / Perfect Welding / Solar Energy
42,0426,0280,EN 004-14082018
Fronius Smart Meter 50kA-3 Operating Instructions
System monitoring
EN
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EN
Dear reader,
Introduction Thank you for the trust you have placed in our company and congratulations on buying this
high-quality Fronius product. These instructions will help you familiarise yourself with the
product. Reading the instructions carefully will enable you to learn about the many different
features it has to offer. This will allow you to make full use of its advantages.
Please also note the safety rules to ensure greater safety when using the product. Careful
handling of the product will repay you with years of safe and reliable operation. These are
essential prerequisites for excellent results.
Explanation of
safety symbols
If you see any of the symbols depicted in the "Safety rules" chapter, special care is re-
quired.
DANGER! Indicates immediate and real danger. If it is not avoided, death or se-
rious injury will result.
WARNING! Indicates a potentially dangerous situation. Death or serious injury
may result if appropriate precautions are not taken.
CAUTION! Indicates a situation where damage or injury could occur. If it is not
avoided, minor injury and/or damage to property may result.
NOTE! Indicates a risk of flawed results and possible damage to the equipment.
IMPORTANT! Indicates tips for correct operation and other particularly useful information.
It does not indicate a potentially damaging or dangerous situation.

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EN
Contents
Safety rules ................................................................................................................................................ 7
General ................................................................................................................................................. 7
Environmental conditions...................................................................................................................... 7
Qualified service engineers................................................................................................................... 7
Copyright............................................................................................................................................... 8
Data protection...................................................................................................................................... 8
Warning notices on the device.............................................................................................................. 8
Installation.................................................................................................................................................. 9
Checklist for installation ........................................................................................................................ 9
Mounting ............................................................................................................................................... 9
Protective circuit.................................................................................................................................... 9
Cabling.................................................................................................................................................. 10
Selection criteria for current transformer............................................................................................... 12
Connecting the current transformers .................................................................................................... 13
Suitable voltage transformers ............................................................................................................... 13
Connecting the data communication cable to the inverter .................................................................... 13
Terminating resistors ............................................................................................................................ 14
Setting the transformation ratio of the current and voltage transformers on the Smart Meter .............. 15
Multi-meter system................................................................................................................................ 16
Setting the address of the Fronius Smart Meter ................................................................................... 17
Configuring the web interface ............................................................................................................... 18
Operation ................................................................................................................................................... 19
Menu structure ...................................................................................................................................... 19
Technical data............................................................................................................................................ 20
Technical data....................................................................................................................................... 20
Fronius manufacturer's warranty .......................................................................................................... 22

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EN
Safety rules
General The device is manufactured using state-of-the-art technology and according to recognised
safety standards. If used incorrectly or misused, however, it can cause:
- injury or death to the operator or a third party
- damage to the device and other material assets belonging to the operator.
All persons involved in commissioning, maintaining and servicing the device must
- be suitably qualified,
- have knowledge of and experience in dealing with electrical installations and
- read and follow these Operating Instructions carefully.
The Operating Instructions must always be at hand wherever the device is being used. In
addition to the Operating Instructions, attention must also be paid to any generally appli-
cable and local regulations regarding accident prevention and environmental protection.
All safety and danger notices on the device:
- must be in a legible state,
- must not be damaged,
- must not be removed,
- must not be covered, pasted or painted over.
The terminals can reach high temperatures.
Only operate the device if all of its protection devices are fully functional. If the protection
devices are not fully functional, there is a risk of
- injury or death to the operator or a third party
- damage to the device and other material assets belonging to the operator
Any safety devices that are not functioning properly must be repaired by a suitably qualified
technician before the device is switched on.
Never bypass or disable protection devices.
For the location of the safety and danger notices on the device, refer to the "General" sec-
tion in the Operating Instructions for the device.
Before switching on the device, remove any faults that could compromise safety.
This is for your personal safety!
Environmental
conditions
Operation or storage of the device outside the prescribed area will be deemed as "not in
accordance with the intended purpose". The manufacturer shall not be held liable for any
damage arising from such usage.
Qualified service
engineers
The servicing information contained in these Operating Instructions is intended only for the
use of qualified service engineers. An electric shock can be fatal. Do not perform any ac-
tions other than those described in the documentation. This applies even if you are quali-
fied to do so.
All cables and leads must be secured, undamaged, insulated and adequately dimen-
sioned. Loose connections, scorched, damaged or inadequately dimensioned cables and
leads must be immediately repaired by authorised personnel.
Maintenance and repair work must only be carried out by authorised personnel.
It is impossible to guarantee that bought-in parts are designed and manufactured to meet
the demands made of them, or that they satisfy safety requirements. Use only original
spare parts (also applies to standard parts).

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Do not carry out any modifications, alterations, etc. to the device without the manufactur-
er's consent.
Components that are not in perfect condition must be replaced immediately.
Copyright Copyright of these operating instructions remains with the manufacturer.
The text and illustrations are all technically correct at the time of printing. We reserve the
right to make changes. The contents of the operating instructions shall not provide the ba-
sis for any claims whatsoever on the part of the purchaser. If you have any suggestions for
improvement, or can point out any mistakes that you have found in the instructions, we will
be most grateful for your comments.
Data protection The user is responsible for the safekeeping of any changes made to the factory settings.
The manufacturer accepts no liability for any deleted personal settings.
Warning notices
on the device Safety symbols
To avoid electric shocks:
- Do not dismantle or modify the device
- Do not allow any water to enter the device
- Do not allow any foreign substances or material to enter the device
- Do not touch any connections directly
RCM symbol – the product complies with Australian legislative requirements.

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EN
Installation
Checklist for in-
stallation
For information about installation, please refer to the following sections:
Switch off the power supply before establishing a mains connection
Mount the Fronius Smart Meter (see Mounting on page 9)
Connect automatic circuit breakers or automatic circuit breakers and disconnectors
(see Protective circuit on page 9)
Connect the mains cable to the Fronius Smart Meter (see Cabling on page 10)
Mount the current transformers on the conductors. Make sure that the current trans-
formers are pointing in the correct direction. An arrow either points to the load or the
source (public grid) (see Connecting the current transformers on page 13)
Connect the current transformer and Fronius Smart Meter (see Connecting the current
transformers on page 13)
Make sure that the current transformer phases match the mains voltage phases (see
Connecting the current transformers on page 13)
Note down the nominal current of the current transformer for each meter. These val-
ues will be required during setup.
Connect the output terminals of the Fronius Smart Meter to the Fronius system mon-
itoring (see Connecting the data communication cable to the inverter on page 13)
If necessary, set terminating resistors (see Terminating resistors on page 14)
Tug on each wire and plug to make sure that they are securely connected to the ter-
minal blocks.
Switch on the power supply to the Fronius Smart Meter
Check the firmware version of the Fronius system monitoring. To ensure compatibility
between the inverter and the Fronius Smart Meter, the software must always be kept
up to date. The update can be started via the inverter web page or using Solar.web.
Set the transformation ratio of the current and voltage transformers (see Setting the
transformation ratio of the current and voltage transformers on the Smart Meter on
page 15)
If several Fronius Smart Meters are installed in the system, set the address (see "Set-
ting the address" under Setting the address of the Fronius Smart Meter on page 17)
Set meter location via the Fronius system monitoring web interface under "Settings -
Meter - Settings" (see Configuring the web interface on page 18)
Mounting The Fronius Smart Meter can be mounted on a 35 mm DIN rail. The housing comprises 4
modules according to DIN 43880
Protective circuit The Fronius Smart Meter is a hard-wired device and requires a disconnecting device (cir-
cuit breaker, switch or disconnector) and overcurrent protection (automatic circuit breaker).
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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The Fronius Smart Meter consumes just 10-30 mA, so that the nominal capacity of all
switches, disconnectors, fuses and/or automatic circuit breakers is determined by the wire
gauge, mains voltage and required breaking capacity.
- Switches, disconnectors and circuit breakers must be within sight and located as close
as possible to the Fronius Smart Meter; they must also be easy to use.
- Use automatic circuit breakers that are rated for max. 6 A.
- To monitor more than one mains voltage, use connected automatic circuit breakers.
- The automatic circuit breakers must protect the mains terminals, which are marked L1,
L2 and L3. In rare cases where the neutral conductor has overcurrent protection, the
overcurrent protection device must interrupt both neutral and non-earthed cables con-
currently.
- The circuit protection/disconnecting device must satisfy the requirements of IEC
60947-1 and IEC 60947-3, as well as all national and local regulations for electrical
systems.
Cabling - Always switch off the power supply before connecting the mains voltage inputs to the
Fronius Smart Meter.
- Litz wires of the following gauge are recommended for use as mains voltage cables:
Screw terminals, measuring input
- Wire (rigid): min. 0.05 mm² / max. 4 mm²
- Wire (flexible): min. 0.05 mm² / max. 2.5 mm²
- Recommended torque: 0.5 Nm / max. 0.8 Nm
- Do not install more than one cable per screw terminal. If necessary, use terminal
blocks.
Connect each conductor to the corresponding phase; if necessary, connect the neutral
conductor as well. Neutral conductor "N / 11" is not absolutely necessary. As shown in the
circuit diagram, the measuring inputs of the current transformers must be earthed on one
side.
Connect each voltage cable to the terminal strip as shown in the graphics below.
Fronius Smart Meter 50kA-3
1N1E
INPUT
CURRENT
L
N
1852
852
3467911
11
LOAD /
PRODUCTION
GRID
X
S1
ab
AB
P1
6A

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EN
3-2E (1-3)
INPUT
CURRENT
L1
L2
L3
1852
852 3467911
X
X
X
6A 6A 6A
S1
abab
ABAB
P1
S1
P1
Fronius Smart Meter 50kA-3
LOAD / PRODUCTION
GRID
3-3E
L1
L2
L3
852
abab
ABAB
INPUT
CURRENTVOLTAGE
1852 3 4 6 7 911
X
X
X
S1
P1 S1
P1
P1
S1
Fronius Smart Meter 50kA-3
6A 6A 6A
LOAD / PRODUCTION
GRID
3-2E (1-2)
INPUT
CURRENT
L1
L2
L3
1852
852 3467911
X
X
X
S1
abab
ABAB
P1 S1
P1
Fronius Smart Meter 50kA-3
6A 6A 6A
LOAD / PRODUCTION
GRID
3-2E (2-3)
L1
L2
L3
852
abab
ABAB
INPUT
CURRENTVOLTAGE
1852 3 4 6 7 911
X
X
X
6A 6A 6A
S1
P1
P1
S1
Fronius Smart Meter 50kA-3
LOAD / PRODUCTION
GRID

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Selection criteria
for current trans-
former
General
Do not use current transformers with a voltage output (e.g. 333 mV).
Current transformers are directional. If they are mounted backwards or with swapped
wires, the measured power will be negative.
Primary current
Maximum current per phase. A current converter with a primary current greater than the
maximum expected current per phase should be selected. The closer the expected current
is to this value, the more precise the measurement will be.
Secondary current
The current transformer must supply alternating current at a nominal current of 1 or 5 A.
The nominal values for the current transformer are listed in the current transformer data
sheet.
Power
The Fronius Smart Meter needs 0.3 VA to carry out its measurements. Losses also occur
on the outgoing and return leads. The power of the current converter must be greater than
the sum total of the power of the Fronius Smart Meter and the leads. The higher the power,
the better.
Example: Outgoing and return lead between Fronius Smart Meter and current converter
(together): 2 x 0.5 m = 1 m length with a copper cable cross-section of 1.5 mm² → 1 x 0.6
VA
Fronius Smart Meter self-consumption = 0.3 VA
Total = 0.6 VA + 0.3 VA = 0.9 VA
A current converter with a rating of 1 VA, 1.5 VA, 5 VA or higher is suitable here.
Accuracy class
Use Class 1 or better (Class 0.5, 0.2, etc.). Class 1 is equivalent to a deviation of ± 1% of
the secondary current at maximum power.
3N3E CURRENT
L1
L2
L3
N
1852
852 3467911
X
X
X
S1
an
AN
P1
S1
P1
11
XXX
Fronius Smart Meter 50kA-3
VOLTAGE
INPUT
6A 6A 6A
LOAD / PRODUCTION
GRID
Line resistances at different cross-sections (copper wires)
Secondary cur-
rent
[A]
Cross-section
[mm²]
Line resistances at different lead lengths
(outgoing and return lead)
0.5 m 1.0 m 2.5 m 5 m 10 m
5 1.5 0.3 VA 0.6 VA 1.5 VA 2.9 VA 5.8 VA
5 2.5 0.2 VA 0.4 VA 0.9 VA 1.8 VA 3.6 VA
5 4 - - 0.6 VA 1.1 VA 2.2 VA

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EN
Mounting
Rigid or hinged
"Rigid" is usually cheaper with better power and accuracy values. Hinged current trans-
formers can be opened for attachment to the conductor. To prevent it being opened inad-
vertently, a nylon cable tie can be secured to the current transformer. Hinged current
transformers can be installed in a system without interrupting the voltage
Connecting the
current trans-
formers
- Make sure that the current transformers match the voltage phases.
Make sure that current transformer L1 measures the current on the same phase that
is monitored by voltage input L1. The same applies for phases L2 and L3.
- Make sure that the current transformers are pointing in the correct direction. Observe
the data sheet for the current transformer.
Attach the current transformers to the conductor to be measured and connect the current
transformer cables to the Fronius Smart Meter. Always switch off the power supply before
disconnecting live conductors.
The current transformers are connected to connections 1 and 3; 4 and 6; 7 and 9. If nec-
essary, excessively long cables can be shortened accordingly. Observe the sequence in
which the phases are connected. Accurate power measurement is only ensured if the
mains voltage phases match the current phases.
Suitable voltage
transformers
Suitable voltage transformers: Only voltage transformers with a voltage range of 210 to
440 V (phase-to-phase) may be used. The voltage transformers must be connected to ter-
minals 2, 5, 8 and 11 at the point of direct voltage measurement.
Connecting the
data communica-
tion cable to the
inverter
Type 1 Fronius inverters
- Connect the data communication connections of the Fronius Smart Meter to the Fro-
nius system monitoring in the inverter
- Connect D+ to 33 at the Smart Meter
- Connect D- to 34 at the Smart Meter
- Connect - to 35 at the Smart Meter
- Several Smart Meters can be installed in the system, see chapter Multi-meter sys-
tem on page 16
Type 2 Fronius inverters
- Connect the data communication connections of the Fronius Smart Meter to the Fro-
nius system monitoring in the inverter
- Connect M1+ to 33 on the Smart Meter
- Connect M1- to 34 on the Smart Meter
- Connect GND to 35 on the Smart Meter
- Connect the cable shield to the shield connection
- Several Smart Meters can be installed in the system, see chapter Multi-meter sys-
tem on page 16
OUTPUT
RS 485
Rx / Tx GND
33 34 35
+-
Fronius
Inverter
Type 1
120 Ω
ON
D+ D--
*

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Type 1 and type 2 Fronius inverters
- The outputs of the Fronius Solar Meter are electrically isolated from hazardous volt-
ages.
- If the output cables are close to the mains cabling, use wires or cables that are de-
signed for 300 to 600 V (never less than the operating voltage).
- If the output cables are close to bare conductors, the cables must be double insulated
or sheathed.
- Two wires can be installed in each screw terminal; the wires are twisted, inserted into
the terminal and tightened. Note: A loose wire can disable an entire area of the net-
work.
- Use a shielded twisted pair cable and connect the shield to the "shield" connection on
the type 2 inverter to avoid interference.
- Cables of type CAT5 or higher may be used
- Use a mutual twisted cable pair for corresponding data lines (D+ and D- or M1+ and
M1-)
Terminating re-
sistors
The system may work without terminating resistors. However, due to interference, it is rec-
ommended that terminating resistors are used as illustrated below to ensure proper func-
tioning.
Fronius
Inverter
Type 2
ON
M1+ M1-GND
Shield
max. 300 m
OUTPUT
RS 485
Rx / Tx GND
33 34 35
+-
120 Ω
*

15
EN
*) The R 120 Ohm terminating resistor is supplied with the Fronius Smart Meter
**) e.g. Fronius Ohmpilot, Fronius Solar Battery, etc.
Setting the trans-
formation ratio of
the current and
voltage trans-
formers on the
Smart Meter
Only the transformation ratio of the current and voltage transformers must be set. All other
parameters have already been set in advance.
Password (0001):
Transformation ratio of the current transformers1) (0001 - 99992)):
D- / D+ -
120 Ω
*)
Modbus RTU
Slave
D- / D+ -
D- / D+ -
120 Ω
*)
Data (Recommended cable: CAT)
Data (Recommended cable: CAT)
Data (Recommended cable: CAT)
max.
300 m
max.
300 m
max.
300 m
OPTION 1
OPTION 1
OPTION 3
OPTION 3
OPTION 4
OPTION 4
OPTION 2
OPTION 2
Fronius
Smart
Meter
Fronius
Inverter
Fronius
Smart
Meter
Modbus
RTU
Slave**)
Data (Recommended cable: CAT)
max.
300 m
Fronius
Smart
Meter
Modbus
RTU
Slave**)
Fronius
Smart
Meter
Modbus
RTU
Slave**)
Modbus RTU
Slave
Modbus RTU
Slave
OUTPUT
RS 485
D+ / D- -
33 34 35
33 34 35
33 34 35
120 Ω
*)
OUTPUT
RS 485
D+ / D- -
120 Ω
*)
OUTPUT
RS 485
D+ / D- -
120 Ω
*)
OUTPUT
RS 485
D+ / D- -
33 34 35
Fronius
Inverter
Fronius
Inverter
Fronius
Inverter
Modbus
ON (1)OFF (0)
Modbus
ON (1)OFF (0)
Modbus
ON (1)OFF (0)
Modbus
ON (1)OFF (0)
+

16
Transformation ratio of the voltage transformers1), 3) (001.0 - 500.02)):
Change (and remember!) password:
1)Important! Changing the transformation ratios will reset the counters in the Fronius
Smart Meter to 0.
2) Transformation ratio in the current transformer x Transformation ratio of the voltage
transformers = max. 1,000,000
3) Changeover only when using voltage transformers (direct voltage measurement Vt = 1)
Multi-meter sys-
tem
If several Fronius Smart Meters are installed in the system, a separate address must be
set for each meter. The primary meter is always assigned address 1. All the other meters
are numbered consecutively with the address range from 2 to 14. Different types of Fronius
Smart Meters can be used in combination.
Location of the primary meter in the consumption branch
+
1)
+
1)
+
Grid Grid
Meter
Primary
Meter
Fronius
Inverter
Communication Line
Maximum 3 secondary meter!
Consumption
Meter 1 Load 1
Load 2
Source 1
Consumption
Meter 2
Source
Meter 1
120 Ω
120 Ω
IN OUT
IN OUT
IN OUT

17
EN
Location of the primary meter at the feed-in point
The following must be observed in a multi-meter system:
- Each Modbus address must only be assigned once
- Terminating resistors must be positioned individually for each channel
- The primary meter and the battery must be on different channels
- The remaining Modbus nodes must be distributed equally
Setting the ad-
dress of the Fro-
nius Smart Meter
Set the address of the Fronius Smart Meter:
Enter the password "2633"
Select the Address menu item – do not change any other settings!
Set the relevant address
Configure Smart Meter in the web interface:
Open the web interface of the Fronius Datamanager and "Settings"
Netz Netz-
zähler
Primär-
zähler
Fronius
Wechsel-
richter
Datenlei-
tung
Maximal 3 Sekundärzähler!
Verbrauchs-
zähler 1 Last 1
Last 2
Erzeuger
1
Verbrauchs-
zähler 2
Erzeuger-
zähler 1
120 Ω
120 Ω
IN OUT
IN OUT
IN OUT
Page Moves the cursor
Prog Increases the set value
Page + Prog Confirms
Page Moves the cursor
Prog Increases the set value
Page + Prog Confirms
Permissible values: 1 ... 14
1
+
+
2x 6x 3x 3x
2
+ + +
+ + +
+ + +
3
1

18
Select and add secondary meter
Enter designation and set Modbus address
Add meter description
Repeat the process for additional meters, if necessary
Configuring the
web interface
Open the web interface of the Fronius Datamanager and "Settings"
Select the "Meter" menu
Click "Settings"
Set the location of the meter
2
3
4
5
1
2
3
4

19
EN
Operation
Menu structure A graphic view of the menu structure can be found in the User Information that is supplied
as standard.

20
Technical data
Technical data Modbus transmission speed: 9600 baud
Parity bit: None
Software version: Datamanager 3.7.2 / Energypackage 1.3.3
Input
Three-phase nominal voltage
Operating range
400 - 415 V
363 to 457 V
Single-phase nominal voltage
Operating range
230 - 240 V
210 to 264 V
Voltage transformer ratio (kVT) 1...1500.0
e.g. VT 20000/400V kVT = 50
For direct connection: kVT = 1
Self-consumption - voltage path (max. volt-
age)
4.5 VA (1.85 W) for 440 V
Nominal frequency
Tolerance
50 - 60 Hz
47 to 63 Hz
Nominal current, lb 1 A + 5 A
Maximum current, Imax 6 A
Starting current 20 mA
Current transformer ratio (kCT) 1...9,999
e.g. TC 800/5A kCT = 160
For direct connection: kCT = 1
Short-time overload (EN/IEC 62053-21, EN/
IEC 62053-23)
20 lmax / 0.5 s
Self-consumption - current path (max. cur-
rent)
0.3 W for phase
Maximum value kVT x kCT 5,000,000 (CT/1A) or 1,000,000 (CT/5A)
Current distortion factor In acc. with EN/IEC 62053-21
Power factor
Operating range (EN/IEC 62053-21, EN/
IEC 62053-23)
Active cosφ 0.5 ind to 0.8 cap,
Reactive sinφ 0.5 ind to 0.5 cap
Energy
Max. display As per table
Resolution As per table
LED indicator 1 pulse / 0.1 Wh
Active energy accuracy
(EN/IEC 62053-21)
Class 1
Reactive energy accuracy
(EN/IEC 62053-23)
Class 2
Response time after switch-on
(EN/IEC 62053-21, EN/IEC 62053-23)
< 5 s
kCT x kVT Maximum display Resolution
1 to 9.9 9 9 9 9 9 9 . 9 9 kWh / kvarh 10 Wh / varh
10 to 99.9 9 9 9 9 9 9 9 . 9 kWh / kvarh 100 Wh / varh
100 to 999.9 9 9 9 9 9 9 9 9 kWh / kvarh 1 kWh / varh