FRO­NIUS Smart Meter 50kA-3 User manual

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Fronius Smart Meter 50kA-3
EN
Operating instructions
System monitoring
42,0426,0280,EN 007-04032021
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Contents
Safety rules 4
Explanation of safety notices 4
General 4
Environmental conditions 5
Qualified personnel 5
Copyright 5
Data protection 5
General 6
Device description 6
Symbols on the device 6
Positioning 6
Installation 8
Checklist for installation 8
Installation 8
Protective circuit 8
Cabling 9
Selection criteria for current transformers 11
Connecting the current transformers 12
Suitable voltage transformers 12
Connecting the data communication cable to the inverter 12
Terminating resistors - Explanation of symbols 14
Terminating resistors 14
Setting the transformation ratio of the current and voltage transformers on the Fronius Smart Meter 15
Multi-meter system - Explanation of symbols 16
Modbus participants - Fronius SnapInverter 17
Multi-meter system - Fronius SnapINverter 17
Modbus participants - Fronius GEN24 18
Multi-meter system - Fronius GEN24 inverter 19
Menu structure 20
Setting the address of the Fronius Smart Meter 20
Start-up 23
Fronius SnapINverter 25
General 25
Connecting to the Fronius Datamanager 25
Configuring the Fronius Smart Meter as the primary meter 25
Configuring the Fronius Smart Meter as a secondary meter 26
Fronius GEN24 inverter 27
General 27
Installation using the web browser 27
Configuring the Fronius Smart Meter as the primary meter 28
Configuring the Fronius Smart Meter as a secondary meter 28
Technical data 29
Technical data 29
Fronius manufacturer's warranty 32
3
EN

Safety rules
Explanation of
safety notices DANGER!
Indicates immediate danger.
▶If not avoided, death or serious injury will result.
WARNING!
Indicates a potentially hazardous situation.
▶If not avoided, death or serious injury may result.
CAUTION!
Indicates a situation where damage or injury could occur.
▶If not avoided, minor injury and/or damage to property may result.
NOTE!
Indicates a risk of flawed results and possible damage to the equipment.
General The device has been manufactured in line with the state of the art and according to
recognized 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 operating com-
pany.
All personnel involved in commissioning, maintenance, and servicing of the device must:
- Be suitably qualified
- Have knowledge of and experience in dealing with electrical installations and
- Have fully read and precisely followed these Operating Instructions
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
applicable and local regulations regarding accident prevention and environmental protec-
tion.
All safety and danger notices on the device:
- Must be kept 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 when all protection devices are fully functional. If the protection
devices are not fully functional, there is a danger of:
- Injury or death to the operator or a third party
- Damage to the device and other material assets belonging to the operating company
Any safety devices that are not fully functional must be repaired by an authorised spe-
cialist before the device is switched on.
Never bypass or disable protection devices.
4

For the location of the safety and danger notices on the device, refer to the section
headed "General remarks" in the Operating Instructions for the device.
Any equipment malfunctions which might impair safety must be remedied before the
device is turned on.
This is for your personal safety!
Environmental
conditions
Operation or storage of the device outside the stipulated area will be deemed as not in
accordance with the intended purpose. The manufacturer accepts no liability for any
damage resulting from improper use.
Qualified person-
nel
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 carry out
any actions other than those described in the documentation. This also applies to quali-
fied personnel.
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 an authorised specialist.
It is impossible to guarantee that bought-in parts are designed and manufactured to meet
the demands made on them, or that they satisfy safety requirements. Use only original
spare parts (also applies to standard parts).
Do not carry out any alterations, installations, or modifications to the device without first
obtaining the manufacturer's permission.
Components that are not in perfect condition must be changed 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
basis for any claims whatsoever on the part of the purchaser. If you have any sugges-
tions for improvement, or can point out any mistakes that you have found in the instruc-
tions, 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.
5
EN

General
Device descrip-
tion
The Fronius Smart Meter is a bidirectional electricity meter which optimises self-con-
sumption and records the household's load curve. In conjunction with the Fronius
inverter, Fronius Datamanager and Fronius data interface, the Fronius Smart Meter
provides a clear overview of a user's own power consumption.
The meter measures the power flow to the loads or to the grid and forwards the informa-
tion via the Modbus RTU/RS485 communication to the Fronius inverter.
CAUTION!
Observe and follow safety instructions!
Failure to observe the safety instructions will result in damage to personnel and equip-
ment.
▶Switch off the power supply before establishing a mains connection.
▶Observe the safety instructions.
Symbols on the
device
Technical data, markings and safety symbols are located on the Fronius Smart Meter.
These must not be removed nor painted over. The notices and symbols warn of incorrect
operation that could result in serious injury and damage to property.
Symbols on the rating plate:
CE mark
The devices conform to all the requisite and relevant standards and guidelines
that form part of the relevant EU directive, and are therefore permitted to dis-
play the CE mark.
Regulatory Compliance Mark (RCM)
Complies with all applicable regulatory requirements in Australia and New Zea-
land regarding safety and electromagnetic compatibility, as well as specific
requirements for radio equipment.
WEEE mark
In accordance with European Directive 2012/19/EU on waste electrical and
electronic equipment and its implementation in national law, used electrical
devices must be collected separately and recycled in an environmentally
responsible manner. Ensure that you return your used device to your dealer or
obtain information regarding a local, authorised collection and disposal system.
Failure to comply with this EU Directive may result in a negative impact on the
environment and your health!
Positioning The Fronius Smart Meter can be installed at two possible locations in the system: at the
feed-in point and at the consumption point.
6

Placement at the feed-in point
Fronius Smart Meter located at the feed-in point.
Placement at the consumption point
Fronius Smart Meter located at the consumption load.
7
EN

Installation
Checklist for
installation
For installation information, see the following chapters:
1Switch off the power supply before establishing a mains connection.
2Mount the Fronius Smart Meter (see Installation on page 8).
3Connect automatic circuit breakers or automatic circuit breakers and disconnectors
(see Protective circuit on page 8).
4Connect the mains cable to the Fronius Smart Meter (see Cabling on page 9).
5Mount 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 12).
6Connect the current transformer and Fronius Smart Meter (see Connecting the cur-
rent transformers on page 12).
7Make sure that the current transformer phases match the mains voltage phases (see
Connecting the current transformers on page 12).
8Note down the nominal current of the current transformer for each meter. These val-
ues will be required during setup.
9Connect the output terminals of the Fronius Smart Meter to the Fronius inverter (see
Connecting the data communication cable to the inverter on page 12).
10 If necessary, set terminating resistors (see Terminating resistors on page 14).
11 Tug on each wire and plug to make sure that they are securely connected to the ter-
minal blocks.
12 Switch on the power supply to the Fronius Smart Meter.
13 Check the firmware version of the Fronius inverter. 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.
14 Set the transformation ratio of the current and voltage transformers (see Setting the
transformation ratio of the current and voltage transformers on the Fronius
Smart Meter on page 15).
15 If several Fronius Smart Meters are installed in the system, set the address (see
"Setting the address" under Setting the address of the Fronius Smart Meter on
page 20).
16 Configure and commission the meter (see Start-up on page 23).
Installation The Fronius Smart Meter can be mounted on a 35 mm DIN rail. The housing comprises
4 DUs (division units, max. 72 mm).
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).
The Fronius Smart Meter consumes 10 - 30 mA. The nominal capacity of the disconnect-
ing devices and the overcurrent protection is determined by the wire thickness, the mains
voltage and the required breaking capacity.
8

- Disconnecting devices must be mounted within sight and as close as possible to the
Fronius Smart Meter; they must also be easy to use.
- The disconnecting devices must satisfy the requirements of IEC 60947-1 and IEC
60947-3, as well as all national and local regulations for electrical systems.
- Use overcurrent protection rated for max. 63 A.
- To monitor more than one mains voltage, use connected automatic circuit breakers.
- The overcurrent protection must protect the mains terminals marked L1, L2 and L3.
In rare cases, the neutral conductor has an overcurrent protection which must simul-
taneously interrupt neutral and unearthed lines.
Cabling WARNING!
Danger from mains voltage.
An electric shock can be fatal.
▶Switch off the power supply before connecting the mains voltage inputs to the
Fronius Smart Meter.
IMPORTANT!
Do not install more than one cable per screw terminal. If necessary, use terminal blocks.
The measuring inputs of the current transformers must be earthed on one side as shown
in the circuit diagram.
Connection cross-section:
- 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
Connect each voltage cable to the terminal strip as shown in the graphics below.
9
EN

10

Selection criteria
for current trans-
formers
General
Do not use current transformers with a voltage output.
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 transformer 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 transformer must be greater
than the sum total of the power of the Fronius Smart Meter and the leads. The higher the
power, the better.
11
EN

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
Example
The length of the outgoing and return lead (0.5 m each) between the Fronius Smart
Meter and the current transformer is a total of 1 m and has a copper cable cross-section
of 1.5 mm²; the line resistance is therefore 0.6 VA according to the table above. The self-
consumption of the Fronius Smart Meter is 0.3 VA.
Line resistance 0.6 VA + self-consumption 0.3 VA = 0.9 VA
→ A current transformer 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.
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 plastic 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
necessary, 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 from 210
to 440 V (phase - phase) may be used. The voltage transformers must be connected to
terminals 2, 5, 8 and 11 at the point of direct voltage measurement.
Connecting the
data communica-
tion cable to the
inverter
Fronius SnapINverter:
Connect the data communication connections of the Fronius Smart Meter to the Fronius
system monitoring in the inverter. Several Smart Meters can be installed in the system,
see chapter Multi-meter system - Fronius SnapINverter on page 17.
12

1Connect 35 to -.
2Connect 34 to D-.
3Connect 33 to D+.
Fronius GEN24 inverter:
Connect the data communication connections of the Fronius Smart Meter to the Modbus
interface of the Fronius GEN24 inverter. Several Smart Meters can be installed in the
system, see chapter Multi-meter system - Fronius GEN24 inverter on page 19.
1Connect 35 to GND.
2Connect 34 to M1-.
3Connect 33 to M1+.
ATTENTION! ?
More information on successful commissioning.
Note the following information about connecting the data communication cable to the
inverter.
▶Use cables of type CAT5 or higher.
▶Use a mutual twisted cable pair for data lines that belong together (D+, D- and M1+,
M1-).
▶If the output cables are close to the mains cabling, use wires or cables that are
designed for 300 V to 600 V (never less than the operating voltage).
▶Use double-insulated or sheathed output cables when they are close to bare con-
ductors.
▶Use shielded twisted pair cables to avoid faults.
▶The outputs of the Fronius Smart Meter are electrically isolated from hazardous
voltages.
13
EN

Terminating res-
istors - Explana-
tion of symbols
Inverter in the system
e. g. Fronius Symo
Meter - Fronius Smart Meter
Terminating resistor R 120 Ohm is included in the scope of supply.
Modbus RTU slave
e. g. Fronius Ohmpilot, Fronius Solar Battery, etc.
Terminating resistor
R 120 Ohm
Terminating res-
istors
Due to interference, it is recommended that terminating resistors are used as illustrated
below to ensure proper functioning.
14

* The terminating resistor on Fronius Smart Meters is installed between 33 and 34. The
terminating resistor R 120 Ohm is included with the Fronius Smart Meter.
Setting the trans-
formation ratio of
the current and
voltage trans-
formers on the
Fronius 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)):
+
1)
Transformation ratio of the voltage transformers1), 3) (001.0 - 500.02)):
15
EN

+
1)
Change password and write it down4):
+
1)IMPORTANT! Changing the transformation ratios will reset the meter data 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).
4)IMPORTANT! The password cannot be reset.
Multi-meter sys-
tem - Explanation
of symbols
Grid
supplies the loads in the system if insufficient power is being generated
by the PV modules or supplied by the battery.
Inverter in the system
e. g. Fronius Primo, Fronius Symo, etc.
Utility meter
Measures the measurement data relevant for billing amounts of energy
(in particular kilowatt hours of energy sourced from the grid and energy
fed into the grid). Based on the relevant billing data, the electricity
retailer will invoice the energy sourced from the grid and the purchaser
of the surplus energy will reimburse the energy fed into the grid.
Primary meter
Records the system's load curve and provides measurement data for
energy profiling in Fronius Solar.web. The primary meter also controls
the dynamic feed-in control.
Secondary meter
Records the load curve of individual loads (e.g. washing machine,
lamps, TV, heat pump, etc.) in the consumption branch and provides
measurement data for energy profiling in Fronius Solar.web.
Producer meter
Records the load curve of individual producers (e.g. wind power plant) in
the consumption branch and provides measurement data for energy pro-
filing in Fronius Solar.web.
16

Modbus RTU slave
e. g. Fronius Ohmpilot, Fronius Solar Battery, etc.
Loads in the system
e. g. washing machine, lamps, TV, etc.
Additional loads in the system
e. g. heat pump
Additional producers in the system
e. g. wind power plant
Terminating resistor
R 120 Ohm
Modbus parti-
cipants - Fronius
SnapInverter
A maximum of 4 Modbus participants can be connected to the Modbus terminal.
IMPORTANT!
Only one primary meter, one battery and one Ohmpilot can be connected per inverter.
Due to the high data transfer of the battery, the battery occupies 2 participants.
Example:
Input Battery Fronius
Ohmpilot
Quantity
Primary
meter
Quantity
Secondary
meter
Modbus
1 0
1 1
1 2
1 3
Multi-meter sys-
tem - Fronius
SnapINverter
If several Fronius Smart Meters are installed, a separate address must be set for each
one (see Setting the address of the Fronius Smart Meter on page 20). The primary
meter is always assigned address 1. All the other meters are numbered consecutively
with the address range from 2 to 14. Different Fronius Smart Meter power categories can
be used in combination.
IMPORTANT!
Use max. 3 secondary meters in the system. To avoid interference, it is recommended to
install the terminating resistors according to chapter Terminating resistors on page 14.
17
EN

Location of the primary meter in the consumption branch. *Terminating resistor R 120 Ohm
Location of the primary meter at the feed-in point. *Terminating resistor R 120 Ohm
The following must be observed in a multi-meter system:
- Only assign each Modbus address once.
- Terminating resistors must be positioned individually for each channel.
Modbus parti-
cipants - Fronius
GEN24
The inputs M0 and M1 can be selected for this purpose. A maximum of 4 Modbus parti-
cipants can be connected to the Modbus terminal on inputs M0 and M1.
IMPORTANT!
Only one primary meter, one battery and one Ohmpilot can be connected per inverter.
Due to the high data transfer of the battery, the battery occupies 2 participants.
18

Example 1:
Input Battery Fronius
Ohmpilot
Quantity
Primary
meter
Quantity
Secondary
meter
Modbus 0 (M0)
0 4
0 2
0 1
Modbus 1 (M1)
1 3
Example 2:
Input Battery Fronius
Ohmpilot
Quantity
Primary
meter
Quantity
Secondary
meter
Modbus 0 (M0)
1 3
Modbus 1 (M1)
0 4
0 2
0 1
Multi-meter sys-
tem - Fronius
GEN24 inverter
If several Fronius Smart Meters are installed, a separate address must be set for each
one (see Setting the address of the Fronius Smart Meter on page 20). The primary
meter is always assigned address 1. All the other meters are numbered consecutively
with the address range from 2 to 14. Different Fronius Smart Meter power categories can
be used in combination.
IMPORTANT!
Use max. 7 secondary meters in the system. To avoid interference, it is recommended to
install the terminating resistors according to chapter Terminating resistors on page 14.
19
EN

Location of the primary meter in the consumption branch. *Terminating resistor R 120 Ohm
Location of the primary meter at the feed-in point. *Terminating resistor R 120 Ohm
The following must be observed in a multi-meter system:
- Connect the primary meter and the battery to different channels (recommended).
- The remaining Modbus participants must be distributed equally.
- Only assign each Modbus address once.
- Terminating resistors must be positioned individually for each channel.
Menu structure A graphic view of the menu structure can be found in the User Information that is sup-
plied as standard.
Setting the
address of the
Fronius Smart
Meter
Symbol Name Event Function
Prog 1 x Increases the set value
Page 1 x Moves the cursor
+
Enter 1 x Confirms the entry
20