/ Perfect Charging / Perfect Welding / Solar Energy
42,0426,0209,EN 007-24052017
Installations instructions
EN
Examples of emergency power
switchover
Fronius Energy Package
Grid-connected inverter
2
EN
Contents
General ......................................................................................................................................................
General remarks ...................................................................................................................................
Cabling variants including emergency power circuits without external ENS and 4-pin separation e.g. Germany ..........................................................................................................................................................
Circuit diagram......................................................................................................................................
Functions ..............................................................................................................................................
Cabling for emergency power circuits and non-emergency power circuits...........................................
Transition from feeding energy into the grid to emergency power mode..............................................
Transition from emergency power mode to feeding energy into the grid .............................................
Cabling variants including emergency power circuits with external ENS and 4-pin separation e.g. Germany ...............................................................................................................................................................
Circuit diagram......................................................................................................................................
Functions ..............................................................................................................................................
Cabling for emergency power circuits and non-emergency power circuits...........................................
Transition from feeding energy into the grid to emergency power mode..............................................
Transition from emergency power mode to feeding energy into the grid .............................................
Cabling variants including emergency power circuits with external ENS and 3-pin separation e.g. Austria
Circuit diagram......................................................................................................................................
Functions ..............................................................................................................................................
Cabling for emergency power circuits and non-emergency power circuits...........................................
Transition from feeding energy into the grid to emergency power mode..............................................
Transition from emergency power mode to feeding energy into the grid .............................................
Cabling variants including emergency power circuits with external ENS and 3-pin separation e.g. Austria
or Australia.................................................................................................................................................
Circuit diagram......................................................................................................................................
Functions ..............................................................................................................................................
Cabling for emergency power circuit and non-emergency power circuits.............................................
Transition from feeding energy into the grid to emergency power mode..............................................
Transition from emergency power mode to feeding energy into the grid .............................................
Cabling variants including emergency power circuits with external ENS and 4-pin separation e.g. Italy ..
Circuit diagram......................................................................................................................................
Functions ..............................................................................................................................................
Cabling for emergency power circuits and non-emergency power circuits...........................................
Transition from feeding energy into the grid to emergency power mode..............................................
Transition from emergency power mode to feeding energy into the grid .............................................
Description of components ........................................................................................................................
Description of components for full version ............................................................................................
Appendix
Circuit diagrams: 4-pin separation without ENS ........................................................................................
Circuit diagrams: 4-pin separation with ENS .............................................................................................
Circuit diagrams: 3-pin separation with ENS .............................................................................................
Circuit diagrams: 3-pin separation without ENS ........................................................................................
Circuit diagrams: Australia 3-pin separation without ENS .........................................................................
Circuit diagrams: Italy 4-pin seperation with ENS ......................................................................................
5
5
6
6
6
6
7
7
8
8
8
8
9
9
10
10
10
10
11
11
12
12
12
12
13
13
14
14
14
14
15
15
16
16
17
18
19
20
21
22
23
3
4
EN
General
General remarks
The examples illustrated in this document serve as suggestions and can be used as the
basis for an installation. However, the system installer must always observe the applicable
national guidelines and the grid operator's guidelines and ensure that the system installation complies with them.
The examples from Fronius illustrated here show on the one hand the emergency power
supply of a complete system (or part of a system) in the event of a power failure and a variant using an external ENS.
The question of whether an external ENS must be used or whether the internal components of the inverter are sufficient must be agreed with the respective energy supplier.
ENS... External grid monitoring device with assigned switching facilities
5
Cabling variants including emergency power circuits without external ENS and 4-pin separation e.g.
Germany
Circuit diagram
The circuit diagram can be found in the appendix to this document on page 18.
Functions
-
Cabling for emergency power circuits and nonemergency power
circuits
Reading and transmission of the required variables for energy management and Solar.web by the Fronius Smart Meter.
Disconnecting from the public grid to enable operation in emergency power mode if
the grid parameters are outside the country-specific standards.
Reconnecting to the public grid when the grid parameters are within the limits specified by the country-specific standards.
Establishing a proper ground connection for emergency power mode to ensure the
protection devices function correctly.
Option of having a separate emergency power circuit or several emergency power circuits that are supplied even during failure of the public grid. The total load of the emergency power circuits must not exceed the nominal output of the inverter (3, 4 or 5
kVA). Furthermore, the performance of the Fronius Solar Battery variants should also
be considered. The other circuits are not supplied in the event of a power failure.
If not all the consumers in the home need to be supplied in an emergency power situation,
the circuits need to be divided into emergency power circuits and non-emergency power
circuits.
The total load of the emergency power circuits must not exceed the nominal output of the
inverter (3, 4 or 5 kVA).
The emergency power circuits and non-emergency power circuits must be fused separately according to the required safety measures (residual-current circuit breaker, automatic
circuit breaker, etc.).
In emergency power mode, only the emergency power circuits are disconnected from the
grid by contactor K1; a ground connection is only established for these circuits. The rest of
the home network is not supplied with power in this case.
The following points regarding cabling must be considered:
The main contacts of contactor K1 must be installed between the Fronius Smart Meter
and the residual-current circuit breaker of the inverter or the residual-current circuit
breaker of the emergency power circuits.
The supply voltage for contactor K1 is provided by the public grid and must be connected to phase 1 (L1) after the Fronius Smart Meter and fused accordingly.
To ensure residual-current circuit breakers function in emergency power mode, the
connection between the neutral conductor and the ground conductor must be established as close as possible to the inverter, but in any case before the first residual-current circuit breaker. An NC contact is used for this purpose for each of the main
contacts of contactors K4 and K5. This ensures that the ground connection is established as soon as the public grid connection is no longer available.
As with contactor K1, the supply voltage for contactors K4 and K5 is provided via
phase 1 (L1) of the public grid.
An NC contact for contactor K3 interrupts the supply voltage to contactors K1, K4 and
K5. This prevents the ground connection from being immediately disconnected again
when power returns to the public grid and the emergency power network of the inverter
from being switched to the public grid.
The NO contact of contactor K3 gives feedback to the inverter on whether the locking
was successfully performed by contactor K3.
6
1.
2.
3.
4.
5.
6.
7.
Transition from
emergency power
mode to feeding
energy into the
grid
1.
2.
3.
4.
5.
6.
7.
8.
The public grid is monitored by the inverter's internal grid and system protection and
by the Fronius Smart Meter connected to it.
Failure of the public grid
The inverter carries out the measures necessary according to the country standard
and then switches off.
Contactor K1 drops out. This disconnects the emergency power circuits and the inverter from the rest of the home network and from the public grid, as the main contacts of
the 4-pin contactor K1 open. The inverter activates relay K3, which interrupts the supply to contactors K1, K4 and K5. This prevents unintentional activation of contactors
K1, K4 and K5 and thus a grid connection when power returns. The NC auxiliary contact of contactor K1 gives the inverter feedback that emergency power mode may be
started.
The NC main contacts of contactors K4 and K5 are closed, establishing a connection
between the neutral conductor and the ground conductor. The two other NC main contacts of contactors K4 and K5 give feedback to the inverter that the ground connection
has been correctly established.
The NO contact of contactor K3 gives the inverter an optional feedback on whether
the locking by contactor K3 was performed successfully.
The inverter decides based on both the contactor's feedback as well as the measurement that the emergency power mode can be activated.
The inverter starts emergency power mode after a defined checking period.
All loads in the emergency power circuits are supplied with power. The remaining
loads are not supplied with power and are safely isolated.
The inverter is operating in emergency power mode. Contactor K1 to the public grid is
open.
Public grid available again
The Fronius Smart Meter monitors the grid parameters on the public grid and passes
this information to the inverter.
After a defined measuring period, the restored public grid is deemed to be stable.
On the basis of adjustments that have been carried out, the inverter ends emergency
power mode and disconnects the outputs.
The inverter deactivates K3. Contactor K1 is reactivated.
All circuits are reconnected to the public grid and are supplied by the grid.
The inverter can start feeding energy into the grid again after performing the grid
checks required by the country standard.
7
EN
Transition from
feeding energy
into the grid to
emergency power
mode
Cabling variants including emergency power circuits with external ENS and 4-pin separation e.g.
Germany
Circuit diagram
The circuit diagram can be found in the appendix to this document on page 19.
Functions
-
Cabling for emergency power circuits and nonemergency power
circuits
Reading and transmission of the required variables for energy management and Solar.web by the Fronius Smart Meter.
Monitoring of the voltage and frequency grid parameters by the grid and system protection.
Disconnecting from the public grid to enable operation in emergency power mode if
the grid parameters are outside the country-specific standards.
Reconnecting to the public grid when the grid parameters are within the limits specified by the country-specific standards.
Establishing a correct ground connection for emergency power mode.
Option of having a separate emergency power circuit or several emergency power circuits that are supplied even during failure of the public grid. The total load of the emergency power circuits must not exceed the nominal output of the inverter (3, 4 or 5
kVA). Furthermore, the performance of the Fronius Solar Battery variants should also
be considered. The other circuits are not supplied in the event of a power failure.
If not all the consumers in the home need to be supplied in an emergency power situation,
the circuits need to be divided into emergency power circuits and non-emergency power
circuits.
The total load of the emergency power circuits must not exceed the nominal output of the
inverter (3, 4 or 5 kVA).
The emergency power circuits and non-emergency power circuits must be fused separately according to the required safety measures (residual-current circuit breaker, automatic
circuit breaker, etc.).
In emergency power mode, only the emergency power circuits are disconnected from the
grid by contactor K1; a ground connection is only established for these circuits. The rest of
the home network is not supplied with power in this case.
The following points regarding cabling must be considered:
The main contacts of contactors K1 and K2 must be installed between the Fronius
Smart Meter and the residual-current circuit breaker of the inverter or the residual-current circuit breaker of the emergency power circuits.
The supply voltage for contactors K1 and K2 is provided by the public grid and must
be connected to phase 1 (L1) after the Fronius Smart Meter and fused accordingly.
Contactors K1 and K2 are activated by an external grid monitoring device with assigned switching facilities (ENS).
The external ENS must be installed on the Fronius Smart Meter. Precise installation
and cabling notes for the external ENS can be found in its separate operating instructions.
The remote trip input (RTG / RT1) of the external ENS must be set to NC according to
the manufacturer's operating instructions.
To ensure residual-current circuit breakers function in emergency power mode, the
connection between the neutral conductor and the ground conductor must be established as close as possible to the inverter, but in any case before the first residual-current circuit breaker. An NC contact is used for this purpose for each of the main
8
-
-
Transition from
feeding energy
into the grid to
emergency power
mode
1.
The public grid is monitored by the inverter's internal grid and system protection and
by an external ENS.
2. Failure of the public grid
3. The inverter carries out the measures necessary according to the country standard
and then switches off.
4. The external ENS opens contactors K1 and K2 for grid monitoring. This disconnects
the emergency power circuits and the inverter from the rest of the home network and
from the public grid, as the main contacts of the 4-pin contactor K1 open. To ensure
that the public grid has definitely been disconnected, the NC auxiliary contacts of contactors K1 and K2 give feedback to the external ENS.
5. The inverter may now start emergency power mode.
6. The inverter activates contactor K3, which activates the remote input of the external
ENS via an NC contact. This prevents a connection to the public grid when power returns.
7. The NC main contacts of contactors K4 and K5 are closed, establishing a connection
between the neutral conductor and the ground conductor. The two other NC main contacts of contactors K4 and K5 give feedback to the inverter that the ground connection
has been correctly established.
The NO contact of contactor K3 gives the inverter an optional feedback on whether
the locking by contactor K3 was performed successfully.
8. The inverter decides based on both the contactor's feedback as well as the measurement that the emergency power mode can be activated.
9. The inverter starts emergency power mode after a defined checking period.
10. All loads in the emergency power circuits are supplied with power. The remaining
loads are not supplied with power and are safely isolated.
Transition from
emergency power
mode to feeding
energy into the
grid
1.
2.
3.
4.
5.
6.
7.
8.
The inverter is operating in emergency power mode. The contactors K1 and K2 to the
public grid are open.
Public grid available again
The Fronius Smart Meter monitors the grid parameters on the public grid and passes
this information to the inverter.
After a defined measuring period, the restored public grid is deemed to be stable.
On the basis of adjustments that have been carried out, the inverter ends emergency
power mode and disconnects the outputs.
The inverter deactivates K3. The contactors K1 and K2 are reactivated.
All circuits are reconnected to the public grid and are supplied by the grid.
The inverter can start feeding energy into the grid again after performing the grid
checks required by the country standard.
9
EN
-
contacts of contactors K4 and K5. This ensures that the ground connection is established as soon as the public grid connection is no longer available.
As with contactor K1, the supply voltage for contactors K4 and K5 is provided via
phase 1 (L1) of the public grid and is switched via the external ENS.
An NC contact for contactor K3, which activates the remote input of the external ENS,
interrupts the supply voltage to contactors K1, K2, K4 and K5. This prevents the
ground connection from being immediately disconnected again when power returns to
the public grid and the emergency power network of the inverter from being switched
to the public grid.
The NO contact of contactor K3 gives feedback to the inverter on whether the locking
was successfully performed by contactor K3.
Cabling variants including emergency power circuits with external ENS and 3-pin separation e.g.
Austria
Circuit diagram
The circuit diagram can be found in the appendix to this document on page 20.
Functions
-
Cabling for emergency power circuits and nonemergency power
circuits
Reading and transmission of the required variables for energy management and Solar.web by the Fronius Smart Meter.
Monitoring of the voltage and frequency grid parameters by the grid and system protection.
Disconnecting from the public grid to enable operation in emergency power mode if
the grid parameters are outside the country-specific standards.
Reconnecting to the public grid when the grid parameters are within the limits specified by the country-specific standards.
Option of having a separate emergency power circuit or several emergency power circuits that are supplied even during failure of the public grid. The total load of the emergency power circuits must not exceed the nominal output of the inverter (3, 4 or 5
kVA). Furthermore, the performance of the Fronius Solar Battery variants should also
be considered. The other circuits are not supplied in the event of a power failure.
If not all the consumers in the home need to be supplied in an emergency power situation,
the circuits need to be divided into emergency power circuits and non-emergency power
circuits.
The total load of the emergency power circuits must not exceed the nominal output of the
inverter (3, 4 or 5 kVA).
The emergency power circuits and non-emergency power circuits must be fused separately according to the required safety measures (residual-current circuit breaker, automatic
circuit breaker, etc.).
In emergency power mode, only the emergency power circuits are disconnected from the
grid by contactors K1 and K2 3-pin (L1, L2 and L3). The rest of the home network is not
supplied with power in this case.
The following points regarding cabling must be considered:
The main contacts of contactors K1 and K2 must be installed between the Fronius
Smart Meter and the residual-current circuit breaker of the inverter or the residual-current circuit breaker of the emergency power circuits.
The supply voltage for contactors K1 and K2 is provided by the public grid and must
be connected to phase 1 (L1) after the Fronius Smart Meter and fused accordingly.
Contactors K1 and K2 are activated by an external grid monitoring device with assigned switching facilities (ENS).
The external ENS must be installed on the Fronius Smart Meter. Precise installation
and cabling notes for the external ENS can be found in its separate operating instructions.
The remote trip input (RTG / RT1) of the external ENS must be set to NC according to
the manufacturer's operating instructions.
An NC contact for contactor K3, which activates the remote input of the external ENS,
interrupts the supply voltage to contactors K1 and K2. This prevents the emergency
power network of the inverter from being switched to the public grid.
The NO contact of contactor K3 gives feedback to the inverter on whether the locking
was successfully performed by contactor K3.
10
1.
The public grid is monitored by the inverter's internal grid and system protection and
by an external ENS.
2. Failure of the public grid
3. The inverter carries out the measures necessary according to the country standard
and then switches off.
4. The external ENS opens contactors K1 and K2 for grid monitoring. This disconnects
the emergency power circuits and the inverter from the rest of the home network and
from the public grid, as the main contacts of the contactors K1 and K2 3-pin open. To
ensure that the public grid has definitely been disconnected, the NC auxiliary contacts
of contactors K1 and K2 give feedback to the external ENS.
5. The inverter may now start emergency power mode.
6. The inverter activates contactor K3, which activates the remote input of the external
ENS via an NC contact. This prevents a connection to the public grid when power returns.
7. The NC main contact of contactor K4 gives feedback to the inverter that the grid was
disconnected by the external ENS.
The NO contact of contactor K3 gives the inverter an optional feedback on whether
the locking by contactor K3 was performed successfully.
8. The inverter decides based on both the contactor's feedback as well as the measurement that the emergency power mode can be activated.
9. The inverter starts emergency power mode after a defined checking period.
10. All loads in the emergency power circuits are supplied with power. The remaining
loads are not supplied with power and are safely isolated.
Transition from
emergency power
mode to feeding
energy into the
grid
1.
2.
3.
4.
5.
6.
7.
8.
The inverter is operating in emergency power mode. The contactors K1 and K2 to the
public grid are open.
Public grid available again
The Fronius Smart Meter monitors the grid parameters on the public grid and passes
this information to the inverter.
After a defined measuring period, the restored public grid is deemed to be stable.
On the basis of adjustments that have been carried out, the inverter ends emergency
power mode and disconnects the outputs.
The inverter deactivates K3. The contactors K1 and K2 are reactivated.
All circuits are reconnected to the public grid and are supplied by the grid.
The inverter can start feeding energy into the grid again after performing the grid
checks required by the country standard.
11
EN
Transition from
feeding energy
into the grid to
emergency power
mode
Cabling variants including emergency power circuits with external ENS and 3-pin separation e.g.
Austria or Australia
Circuit diagram
The circuit diagram for the cabling variant "3-pin separation without ENS" can be found in
the appendix to this document on page "21" "Austria without ENS".
The circuit diagram for the cabling variant "3-pin separation without ENS Australia" can be
found in the appendix to this document on page "22" "Australien without ENS".
Functions
-
Cabling for emergency power circuit and nonemergency power
circuits
Measuring and transferring the parameters required for energy management and Solar.web by the Fronius Smart Meter.
Disconnecting from the public grid to enable operation in emergency power mode if
the grid parameters are outside the country-specific standards.
Reconnecting to the public grid when the grid parameters are within the limits specified by the country-specific standards.
Option of having a separate emergency power circuit or several emergency power circuits that are supplied even during failure of the public grid. The total load of the emergency power circuits must not exceed the nominal output of the inverter (3, 4 or 5
kVA). Furthermore, the performance of the Fronius Solar Battery variants should also
be considered. The other circuits are not supplied in the event of a power failure.
The use of contactor K2 is optional in Australia.
If not all the consumers in the home need to be supplied in an emergency power situation,
the circuits need to be divided into emergency power circuits and non-emergency power
circuits.
The total load of the emergency power circuits must not exceed the nominal output of the
inverter (3, 4 or 5 kVA).
The emergency power circuits and non-emergency power circuits must be fused separately according to the required safety measures (residual-current circuit breaker, automatic
circuit breaker, etc.).
In emergency power mode, only the emergency power circuits are disconnected from the
grid by contactors K1 and K2 3-pin (L1, L2 and L3). The rest of the home network is not
supplied with power in this case.
The following points regarding cabling must be considered:
The main contacts of contactors K1 and K2 must be installed between the Fronius
Smart Meter and the residual-current circuit breaker of the inverter or the residual-current circuit breaker of the emergency power circuits.
The supply voltage for contactors K1 and K2 is provided by the public grid and must
be connected to phase 1 (L1) after the Fronius Smart Meter and fused accordingly.
An NC contact for contactor K3 interrupts the supply voltage to contactors K1 and K2.
This prevents the emergency power network of the inverter from being switched to the
public grid.
The NO contact of contactor K3 gives feedback to the inverter on whether the locking
was successfully performed by contactor K3.
12
1.
2.
3.
4.
5.
6.
7.
Transition from
emergency power
mode to feeding
energy into the
grid
1.
2.
3.
4.
5.
6.
7.
8.
The public grid is monitored by the inverter's internal grid and system protection and
by the Fronius Smart Meter connected to it.
Failure of the public grid
The inverter carries out the necessary measures according to the country standard
and then switches off.
Contactors K1 and K2 drop out. This disconnects the emergency power circuits and
the inverter from the rest of the home network and from the public grid, as the main
contacts of the contactors K1 and K2 3-pin open. The inverter activates relay K3,
which interrupts the supply to contactors K1 and K2. This prevents an unintentional
activation of contactors K1and K2 and thus a grid connection when power returns. The
NC auxiliary contact of contactors K1 and K2 give the inverter feedback that emergency power mode may be started.
The NO contact of contactor K3 gives the inverter an optional feedback on whether
the locking by contactor K3 was performed successfully.
The inverter decides based on both the contactor's feedback as well as the measurement that the emergency power mode can be activated.
The inverter starts emergency power mode after a defined checking period.
All loads in the emergency power circuits are supplied with power. The remaining
loads are not supplied with power and are safely isolated.
The inverter is operating in emergency power mode. Contactor K1 to the public grid is
open.
Public grid available again
The Fronius Smart Meter monitors the grid parameters on the public grid and passes
this information to the inverter.
After a defined measuring period, the restored public grid is deemed to be stable.
On the basis of adjustments that have been carried out, the inverter ends emergency
power mode and disconnects the outputs.
The inverter deactivates K3. Contactor K1 is reactivated.
All circuits are reconnected to the public grid and are supplied by the grid.
The inverter can start feeding energy into the grid again after performing the grid
checks required by the country standard.
13
EN
Transition from
feeding energy
into the grid to
emergency power
mode
Cabling variants including emergency power circuits with external ENS and 4-pin separation e.g. Italy
Circuit diagram
The circuit diagram can be found in the appendix to this document on page 23.
Functions
-
Cabling for emergency power circuits and nonemergency power
circuits
Reading and transmission of the required variables for energy management and Solar.web by the Fronius Smart Meter.
Monitoring of the voltage and frequency grid parameters by the grid and system protection.
Disconnecting from the public grid to enable operation in emergency power mode if
the grid parameters are outside the country-specific standards.
Reconnecting to the public grid when the grid parameters are within the limits specified by the country-specific standards.
Establishing a correct ground connection for emergency power mode.
Option of having a separate emergency power circuit or several emergency power circuits that are supplied even during failure of the public grid. The total load of the emergency power circuits must not exceed the nominal output of the inverter (3, 4 or 5
kVA). Furthermore, the performance of the Fronius Solar Battery variants should also
be considered. The other circuits are not supplied in the event of a power failure.
If not all the consumers in the home need to be supplied in an emergency power situation,
the circuits need to be divided into emergency power circuits and non-emergency power
circuits.
The total load of the emergency power circuits must not exceed the nominal output of the
inverter (3, 4 or 5 kVA).
The emergency power circuits and non-emergency power circuits must be fused separately according to the required safety measures (residual-current circuit breaker, automatic
circuit breaker, etc.).
In emergency power mode, only the emergency power circuits are disconnected from the
grid by contactor K1; a ground connection is only established for these circuits. The rest of
the home network is not supplied with power in this case.
The following points regarding cabling must be considered:
The main contacts of contactors K1 and K2 must be installed between the Fronius
Smart Meter and the residual-current circuit breaker of the inverter or the residual-current circuit breaker of the emergency power circuits.
The supply voltage for contactors K1 and K2 is provided by the public grid and must
be connected to phase 1 (L1) after the Fronius Smart Meter and fused accordingly.
Contactors K1 and K2 are activated by an external grid monitoring device with assigned switching facilities (ENS).
The external ENS must be installed on the Fronius Smart Meter. Precise installation
and cabling notes for the external ENS can be found in its separate operating instructions.
The remote trip input (RTG / RT1) of the external ENS must be set to NC according to
the manufacturer's operating instructions.
To ensure residual-current circuit breakers function in emergency power mode, the
connection between the neutral conductor and the ground conductor must be established as close as possible to the inverter, but in any case before the first residual-current circuit breaker. An NC contact is used for this purpose for each of the main
14
-
-
Transition from
feeding energy
into the grid to
emergency power
mode
1.
The public grid is monitored by the inverter's internal grid and system protection and
by an external ENS.
2. Failure of the public grid
3. The inverter carries out the measures necessary according to the country standard
and then switches off.
4. The external ENS opens contactors K1 and K2 for grid monitoring. This disconnects
the emergency power circuits and the inverter from the rest of the home network and
from the public grid, as the main contacts of the 4-pin contactor K1 open. To ensure
that the public grid has definitely been disconnected, the NC auxiliary contacts of contactors K1 and K2 give feedback to the external ENS.
5. The inverter may now start emergency power mode.
6. The inverter activates contactor K3, which activates the remote input of the external
ENS via an NC contact. This prevents a connection to the public grid when power returns.
7. The NC main contacts of contactor K4 is closed, establishing a connection between
the neutral conductor and the ground conductor. The two other NC main contacts of
contactor K4 gives feedback to the inverter that the ground connection has been correctly established.
The NO contact of contactor K3 gives the inverter an optional feedback on whether
the locking by contactor K3 was performed successfully.
8. The inverter decides based on both the contactor's feedback as well as the measurement that the emergency power mode can be activated.
9. The inverter starts emergency power mode after a defined checking period.
10. All loads in the emergency power circuits are supplied with power. The remaining
loads are not supplied with power and are safely isolated.
Transition from
emergency power
mode to feeding
energy into the
grid
1.
2.
3.
4.
5.
6.
7.
8.
The inverter is operating in emergency power mode. The contactors K1 and K2 to the
public grid are open.
Public grid available again
The Fronius Smart Meter monitors the grid parameters on the public grid and passes
this information to the inverter.
After a defined measuring period, the restored public grid is deemed to be stable.
On the basis of adjustments that have been carried out, the inverter ends emergency
power mode and disconnects the outputs.
The inverter deactivates K3. The contactors K1 and K2 are reactivated.
All circuits are reconnected to the public grid and are supplied by the grid.
The inverter can start feeding energy into the grid again after performing the grid
checks required by the country standard.
15
EN
-
contacts of contactors K4 and K5. This ensures that the ground connection is established as soon as the public grid connection is no longer available.
As with contactor K1, the supply voltage for contactor K4 is provided via phase 1 (L1)
of the public grid and is switched via the external ENS.
An NC contact for contactor K3, which activates the remote input of the external ENS,
interrupts the supply voltage to contactors K1, K2 and K4. This prevents the ground
connection from being immediately disconnected again when power returns to the
public grid and the emergency power network of the inverter from being switched to
the public grid.
The NO contact of contactor K3 gives feedback to the inverter on whether the locking
was successfully performed by contactor K3.
Description of components
Description of
components for
full version
Fronius Smart Meter
Type: Fronius Smart Meter 63 A
Fronius item number: 43,0001,1473
230 (400) V - 240 (415) V
10 (63) A / 50 Hz - 60 Hz
Modbus RTU communication
Alternatively,
Type: Fronius Smart Meter 50kA-3
Fronius item number: 43,0001,1478
230 (400) V - 240 (415) V
10 (63) A / 50 Hz - 60 Hz
Modbus RTU communication
External ENS
Other manufacturers and types are permitted if these are technically and functionally the
same as the following:
For example: Manufacturer: Bender
For example: Type: VMD460-NA-D-2
Fuse protection, external ENS
3-pin or 1-pin
6A
K1 and K2 - installation contactor with auxiliary contact
4-pin
25 A or 63 A (depending on house connection)
Coil voltage, 230 V AC
Auxiliary contact, 1 NC
K3 - modular relay
2 changeover contacts
Coil voltage: 12 V DC
K4 and K5 - installation contactor
2 NCs
Coil voltage, 230 V AC
20 A
16
Appendix
Circuit diagrams: 4-pin separation without ENS
DC= IN
BESTEHENDE HAUSINSTALLATION
EXISTING DOMESTIC INSTALLATION
=A2-X1
BAT + +
=A2-X2
BAT - -
=A2-X3
=A2-X4
PE
7
5
6
4
3
2
1
-X5
N
PE
L1
L2
L3
-X4
L3
N
L2
L1
-X1
DD+
31
EIGENSTÄNDIGE NETZUMSCHALTBOX
ODER TEIL DES HAUSANSCHLUSSKASTENS
-K1
32
31
21
-K4
21
22
INDEPENDENT SWITCHOVER BOX OR
PART OF THE HOUSE CONNECTION BOX
11
-K4
-K5
-K3
14
32
22
31
-K5
1
1
31
-K2
32
2
2
2
-F1
1
32
A1
-K3
B / 34
C / 35
A / 33
D+
D-
4
7
L1
L2
L3
1
A2
2
-F3
1
11
3
6
9
L1´
L2´
L3´
N
=P1
Fronius Smart Meter
3 5 17
-K1
1 3 5 7
2 4 6 8
-F2
>= 100mA
TYP A
Selectiv
21
I>
3 5 17
-K3
2 4 6 8
22
-K2
(OPTIONAL)
2 4 6 8
A1
A1
A1
A2
A2
A2
-K1
-K2
1 3 5 7
I>
N
L2
L3
L1
-X3
L3
N
L2
L1
-X2
(OPTIONAL)
1 3 5 7
I>
2 4 6 8
2 4 6 8
LAST
LOAD
NOTSTROMVERSORGUNG
BACKUP LOAD
18
-K4
A1
A2
-K5
TH
12V
GND
SW ON
PE
=A2+A1
Controller
=A2+A1-X5
Tx Debug
4f
0V (Pwr)
2f
Rx Debug
UB (Pwr)
1f
3f
3
1
2
4
=A2+A3-X2
Tx422-
Tx422+
Rx422- (D-)
7m
7
Rx232
Rx422+ (D+)
6m
6
FB-GND (-)
3m
5m
Tx232
2m
4m
4
5
1m
1
=A2-X5
2
3
=A2+A3-X3
16m
15m
13m
12m
11m
14m
15
16
13
14
10m
9m
10
11
12
7m
6m
8m
8
9
7
5
6
5m
D+
D+
+
IO 0
IO 1
IO 2
IO 3
I4
I5
I6
I7
I8
I9
4m
3m
2m
1m
2
1
3
4
=A1+A4.1-X2
1
2
=A1-X1
1
PE
2
PE
3
L1
4
L2
5
L3
6
N
1
PE
PV -
PV -
-X
1
1
1
2
2
2
1
METER FUSE
=A2+A3 Converter Unigate CL-RS
=A1+A4.1 Hybrid Manager
3AC
2
METER FUSE
=A2
Fronius Solar Battery
=A1
Fronius Symo Hybrid
kWh
2
VORZÄHLERSICHERUNG
EVU-ZÄHLER
UTILITY-METE
NACHZÄHLERSICHERUNG
POTENTIALAUSGLEICHSSCHIENE
MEN - LINK
8
=A1-X2
PV+ 1
PV+ 2
X 3
BAT+ 4
DC-1 5
BAT- 6
DC-2 7
L1
L2
L3
N
PV +
PV +
PV-GENERATOR
Circuit diagrams: 4-pin separation with ENS
PV -
PV -
PV +
PV +
DC=
IN
PV-GENERATOR
BESTEHENDE HAUSINSTALLATION
EXISTING DOMESTIC INSTALLATION
L1
L2
L3
=A2-X1
BAT + +
=A2-X2
BAT - -
=A2-X3
4
=A2-X4
=A2-X5
PE
7
6
5
4
3
1
2
-X5
N
PE
L2
L3
L1
-X4
N
L3
L1
L2
-X1
DD+
31
11
-K4
-K3
EIGENSTÄNDIGE NETZUMSCHALTBOX
ODER TEIL DES HAUSANSCHLUSSKASTENS
14
32
1
1
2
-K4
2
2
-F1
1
31
21
21
INDEPENDENT SWITCHOVER BOX OR
PART OF THE HOUSE CONNECTION BOX
-K5
-K5
22
32
22
A1
-K3
1
-F4
1
1
2
2
-
2
2
-F3
1
C / 35
A / 33
B / 34
D+
D-
7
L1
L2
L3
1
4
A2
A1
A2
N
L2
L3
L1
9
11
3
6
L1´
L2´
L3´
N
=P1
Fronius Smart Meter
=F7
External ENS
Bender VMD460-NA
21
22
24
14
11
12
RT1
RTG
D2
2 4 6 8
DG1/2
D1
3 5 17
-K1
1 3 5 7
-F2
>= 100mA
TYP A
Selectiv
I>
2 4 6 8
3 5 17
-K2
2 4 6 8
31
31
21
A2
A2
A2
A2
32
32
22
A1
A1
A1
A1
1 3 5 7
I>
N
L3
L1
L2
-X3
N
L3
L1
L2
-X2
-K1
1 3 5 7
I>
2 4 6 8
2 4 6 8
LAST
LOAD
NOTSTROMVERSORGUNG
BACKUP LOAD
19
-K2
-K3
-K1
-K4
-K5
-K2
TH
SW ON
PE
12V
GND
=A2+A1
Controller
=A2+A1-X5
4f
UB (Pwr)
0V (Pwr)
Rx Debug
Tx Debug
1f
2f
3f
3
1
2
=A2+A3-X2
5m
6m
7m
7
6
4
5
4m
Rx232
Tx232
FB-GND (-)
Rx422+ (D+)
Rx422- (D-)
Tx422+
Tx4223m
2m
1m
1
2
3
=A2+A3-X3
14m
15m
16m
16
13m
13
14
15
10m
12m
8m
9m
11m
11
12
9
10
6m
7m
6
7
8
5m
D+
D+
+
IO 0
IO 1
IO 2
IO 3
I4
I5
I6
I7
I8
I9
4m
2m
1m
3m
4
5
3
1
2
=A1+A4.1-X2
6
3
4
5
PE
PE
L1
L2
L3
N
1
2
1
2
1
=A1-X1
1
PE
6
7
8
3
4
5
1
1
METER FUSE
1
2
2
2
=A2+A3 Converter Unigate CL-RS
=A1+A4.1 Hybrid Manager
3AC
2
METER FUSE
=A2
Fronius Solar Battery
=A1
Fronius Symo Hybrid
kWh
2
EVU-ZÄHLER
UTILITY-METER
NACHZÄHLERSICHERUNG
VORZÄHLERSICHERUNG
POTENTIALAUSGLEICHSSCHIENE
MEN - LINK
PV+
PV+
X
BAT+
DC-1
BATDC-2
1
2
=A1-X2
N
I>
1 3 5
1 3 5 7
1 3 5 7
-K1
-F2
I>
2 4 6 8
I>
1 3 5 7
2 4 6 8
2 4 6 8
LAST
LOAD
NOTSTROMVERSORGUNG
BACKUP LOAD
20
2 4 6
-K2
-K3
11
-K1
24
21
22
14
12
A1
A2
2
-F4
1
A1
N
14
1
-F1
11
2
-K3
L3
1
1
32
2
2
2
2
2
31
RT1
RTG
=P1
Fronius Smart Meter
L1
L2
-F3
B / 34
C / 35
A / 33
4
7
1
-K4
D2
DG1/2
D1
-
D+
D-
L1
L2
L3
1
1
1
7
6
5
4
3
1
2
-X5
PE
N
L2
L3
L1
-X4
DOPPELISOLIERTE LEITUNGEN
DOUBLE INSULATED WIRES
L3
N
L2
L1
-X1
1
2
1
2
PE
PE
L1
L2
L3
N
16m
15m
14m
13m
12m
11m
10m
9m
8m
7m
6m
5m
4m
3m
2m
1m
D+
D+
+
IO 0
IO 1
IO 2
IO 3
I4
I5
I6
I7
I8
I9
=A2-X5
-K3
A2
=F7
External ENS
Bender VMD460-NA
-K1
2 4 6
-K2
3 5 1
31
31
21
A2
A2
32
32
22
A1
A1
-K4
A2
-K2
A1
DD+
=A2-X4
PE
EIGENSTÄNDIGE NETZUMSCHALTBOX
ODER TEIL DES HAUSANSCHLUSSKASTENS
INDEPENDENT SWITCHOVER BOX OR
PART OF THE HOUSE CONNECTION BOX
4
3
1
2
7m
6m
5m
4m
UB (Pwr)
0V (Pwr)
Rx Debug
Tx Debug
TH
SW ON
12V
GND
PE
=A2+A1-X5
4f
3f
2f
1f
=A2+A3 Converter Unigate CL-RS
Rx232
Tx232
FB-GND (-)
Rx422+ (D+)
Rx422- (D-)
Tx422+
Tx422-
=A2+A3-X2
7
6
4
5
3m
=A1+A4.1 Hybrid Manager
2m
kWh
1m
2
2
=A1
Fronius Symo Hybrid
2
3
=A2+A3-X3
1
16
14
15
13
11
12
9
10
8
6
7
4
5
3
1
2
=A1+A4.1-X2
6
4
5
3
=A1-X1
1
2
2
1
1
1
METER FUSE
1
2
3AC
N
>= 100mA
TYP A
Selectiv
L2
L3
11
L1´
L2´
L3´
N
1
2
8
6
7
4
5
3
=A2-X1
BAT + +
=A2-X2
BAT - -
PE
=A2-X3
PV+
PV+
X
BAT+
DC-1
BATDC-2
=A1-X2
POTENTIALAUSGLEICHSSCHIENE
MEN - LINK
L1
3
6
9
METER FUSE
PV -
PV -
PV +
PV +
BESTEHENDE HAUSINSTALLATION
EXISTING DOMESTIC INSTALLATION
-X3
L3
N
L2
L1
-X2
VORZÄHLERSICHERUNG
EVU-ZÄHLER
UTILITY-METE
NACHZÄHLERSICHERUNG
Circuit diagrams: 3-pin separation with ENS
PV-GENERATOR
DC= IN
L1
L2
L3
N
=A2
Fronius Solar Battery
=A2+A1
Controller
Circuit diagrams: 3-pin separation without ENS
DC= IN
BESTEHENDE HAUSINSTALLATION
EXISTING DOMESTIC INSTALLATION
PV -
PV -
L1
PV +
PV +
PV-GENERATOR
L2
L3
=A2-X1
+
BAT +
=A2-X2
-
BAT -
=A2-X3
PE
8
4
PE
1
1
31
11
-K3
14
32
2
2
-K1
2
-F3
31
-K2
32
A1
-K3
C / 35
A / 33
B / 34
D+
D-
7
-
L1
L2
L3
1
4
A2
1
2
9
11
3
6
L1´
L2´
L3´
N
=P1
Fronius Smart Meter
-F1
1 3 5
-K1
2 4
6
21
-K3
22
3 5 1
-K2
(OPTIONAL)
2 4 6
A1
A1
-K1
-K2
A2
(OPTIONAL)
1 3 5 7
-F2
I>
1 3 5 7
I>
N
L2
L3
L1
-X3
2 4 6 8
N
L3
L1
L2
-X2
>= 100mA
TYP A
Selectiv
7
6
5
4
3
1
2
-X5
N
PE
L2
L3
L1
-X4
DOUBLE INSULATED WIRES
1
N
L3
L1
L2
-X1
DOPPELISOLIERTE LEITUNGEN
EIGENSTÄNDIGE NETZUMSCHALTBOX
ODER TEIL DES HAUSANSCHLUSSKASTENS
1 3 5 7
I>
2 4 6 8
2 4 6 8
LAST
LOAD
NOTSTROMVERSORGUNG
BACKUP LOAD
21
A2
INDEPENDENT SWITCHOVER BOX OR
PART OF THE HOUSE CONNECTION BOX
TH
SW ON
PE
=A2+A1-X5
4f
UB (Pwr)
0V (Pwr)
Rx Debug
Tx Debug
2f
1f
3f
3
1
2
6m
5m
7m
7
6
4m
Rx232
Tx232
FB-GND (-)
Rx422+ (D+)
Rx422- (D-)
Tx422+
Tx4223m
2m
1m
1
2
3
=A2+A3-X3
15m
14m
13m
12m
11m
10m
9m
16m
16
14
15
13
11
12
7m
6m
5m
8m
9
10
8
6
7
4
5
4m
D+
D+
+
IO 0
IO 1
IO 2
IO 3
I4
I5
I6
I7
I8
I9
3m
1m
2m
3
1
2
=A1+A4.1-X2
6
=A2+A3-X2
=A2-X4
DD+
=A2+A1
Controller
12V
GND
6
7
3
4
5
4
5
PE
PE
L1
L2
L3
N
3
1
2
1
2
=A1-X1
1
=A2-X5
4
5
1
1
1
2
2
2
1
METER FUSE
=A2+A3 Converter Unigate CL-RS
=A1+A4.1 Hybrid Manager
3AC
2
METER FUSE
=A2
Fronius Solar Battery
=A1
Fronius Symo Hybrid
kWh
2
VORZÄHLERSICHERUNG
EVU-ZÄHLER
UTILITY-METE
NACHZÄHLERSICHERUNG
POTENTIALAUSGLEICHSSCHIENE
MEN - LINK
PV+
PV+
X
BAT+
DC-1
BATDC-2
1
2
=A1-X2
N
Circuit diagrams: Australia 3-pin separation without
ENS
DC= IN
PV -
PV -
BESTEHENDE HAUSINSTALLATION
EXISTING DOMESTIC INSTALLATION
PV +
PV +
PV-GENERATOR
L1
L2
L3
=A2-X1
+
BAT +
=A2-X2
-
BAT -
=A2-X3
PE
8
4
PE
2
2
2
11
-K1
-K3
14
32
A1
-K3
A / 33
B / 34
C / 35
D+
D-
7
-
L1
L2
L3
1
4
A2
1
9
11
3
6
L1´
L2´
L3´
N
=P1
Fronius Smart Meter
2
-F1
3 5 1
21
-K1
-K3
2 4 6
22
A1
-K1
1 3 5 7
N
L1
L2
L3
-X3
N
L3
L1
L2
-X2
A2
I>
1 3 5 7
I>
2 4 6 8
2 4 6 8
LAST
LOAD
NOTSTROMVERSORGUNG
BACKUP LOAD
7
6
5
4
3
2
1
-X5
N
PE
L2
L3
1
1
L1
-X4
N
L3
L1
L2
-X1
1
31
-F3
22
EIGENSTÄNDIGE NETZUMSCHALTBOX
ODER TEIL DES HAUSANSCHLUSSKASTENS
INDEPENDENT SWITCHOVER BOX OR
PART OF THE HOUSE CONNECTION BOX
TH
12V
GND
SW ON
=A2+A1-X5
4f
UB (Pwr)
0V (Pwr)
Rx Debug
Tx Debug
2f
1f
3f
3
1
2
7m
5m
4m
6m
6
4
5
7
3m
2m
Rx232
Tx232
FB-GND (-)
Rx422+ (D+)
Rx422- (D-)
Tx422+
Tx422-
1
1m
=A2+A3-X3
15m
13m
16m
16
12m
11m
10m
9m
14m
14
15
13
11
12
7m
8m
9
10
5m
6
7
8
6m
D+
D+
+
IO 0
IO 1
IO 2
IO 3
I4
I5
I6
I7
I8
I9
4m
2m
1m
3m
4
5
3
1
2
=A1+A4.1-X2
6
4
5
=A2+A3-X2
=A2-X4
DD+
=A2+A1
Controller
PE
6
7
4
5
3
PE
PE
L1
L2
L3
N
3
1
2
1
2
=A1-X1
1
=A2-X5
2
3
1
1
1
2
2
2
1
METER FUSE
=A2+A3 Converter Unigate CL-RS
=A1+A4.1 Hybrid Manager
3AC
2
METER FUSE
=A2
Fronius Solar Battery
=A1
Fronius Symo Hybrid
kWh
2
VORZÄHLERSICHERUNG
EVU-ZÄHLER
UTILITY-METE
NACHZÄHLERSICHERUNG
POTENTIALAUSGLEICHSSCHIENE
MEN - LINK
PV+
PV+
X
BAT+
DC-1
BATDC-2
1
2
=A1-X2
N
Circuit diagrams: Italy 4-pin seperation with ENS
23
Fronius Worldwide - www.fronius.com/addresses
Fronius International GmbH
4600 Wels, Froniusplatz 1, Austria
E-Mail: [email protected]
http://www.fronius.com
Fronius USA LLC Solar Electronics Division
6797 Fronius Drive, Portage, IN 46368
E-Mail: [email protected]
http://www.fronius-usa.com
Under http://www.fronius.com/addresses you will find all addresses of our sales branches and partner firms!