Fronius GEN24 and Tauro Country Setup Menu Operating Instruction [EN]

Operating
Instructions

GEN24 & Tauro Country Setup Menu

Operating Instructions

EN

42,0426,0413,EN 009-09012023

Contents

General 4

Country setup 4
Access code 4
Adjusting parameters with the Fronius Solar.start app 5
Adjusting parameters with the browser 5

Country setup 7

Country setup selection 9

Country setup selection 9

General 10

Startup and Reconnection 10
Ramp Rates 11

Safety 14

Unintentional Islanding Detection 14
Isolation monitoring 14
DC Arc Fault Protection 16
RCMU 18
DC Shutdown Communication 19

Interface Protection 20

Voltage 20
Frequency 23
DC Injection 27

Grid Support Functions 29

Voltage Fault Ride Through (VFRT) 29
Active Power 41
Reactive Power 63

EN

3

General

Country setup The "Country Setup" menu area is intended exclusively for installers/service

technicians from authorised specialist companies. The access code must be re­quested from the national/international Fronius point of contact using an applic­ation form.

CAUTION!

Risk due to unauthorised access.

Incorrectly set parameters can negatively influence the public grid and/or the in­verter feeding energy into the grid, and lead to a loss of conformity with the
standard.

The parameters may only be adjusted by installers/service technicians from

▶

authorised specialist companies.
Do not give the access code to third parties and/or unauthorised persons.

▶

WARNING!

Danger due to unauthorised error analyses and repair work.

This can result in serious injury and damage to property.

Fault analyses and repair work on the photovoltaic system may only be car-

▶

ried out by installers/service technicians from authorized specialist compan­ies in accordance with national standards and guidelines.

The selected country setup for the respective country contains preset paramet­ers according to the nationally applicable standards and requirements. Depend­ing on local grid conditions and the specifications of the energy provider, adjust­ments to the selected country setup may be necessary.

CAUTION!

Risk due to incorrectly set parameters.

Incorrectly set parameters can negatively influence the public grid and/or cause
faults and failures on the inverter, and lead to the loss of standard conformity.

The parameters may only be adjusted by installers/service technicians from

▶

authorised specialist companies.
The parameters may only be adjusted if the energy provider permits or re-

▶

quires this.
Only adjust the parameters taking into account the nationally applicable

▶

standards and/or directives and the specifications of the energy provider.

Access code The "Country setup" menu area is intended exclusively for installers/service tech-

nicians from authorised specialist companies. The access code must be reques­ted from the national/international Fronius point of contact using an application
form.

4

CAUTION!

1 2

open access point

Setup your PV system in a few minutes.

START INSTALLATION

LOGIN

Log in with your Fronius credentials (email adress
& password) in order to get the most out of the
PV System. Installing a new product does not
require a Login.

Imprint & Contact Terms & ConditionsData Privacy

Fronius Solar.start

open access point

1

FRONIUS_PILOTxxx

Secured

Password:

12345678

2

192.168.250.181

Adjusting para­meters with the
Fronius Sol­ar.start app

Risk due to unauthorised access.

Incorrectly set parameters can negatively influence the public grid and/or the in­verter feeding energy into the grid, and lead to a loss of conformity with the
standard.

The parameters may only be adjusted by installers/service technicians from

▶

authorised specialist companies.
Do not give the access code to third parties and/or unauthorised persons.

▶

The "Fronius Solar.start" app is needed for registration. Depending on the end
device, the app is available on the respective platform.

EN

Adjusting para­meters with the
browser

Start the installation in the app.

1

Select the product to which the connection should be established.

2

3

Open the access point by touching the sensor once → Communication LED:
flashes blue.

Select the "Technician" user in the "User menu" and enter and confirm the

4

password for the "Technician" user.

Call up the "Safety and grid regulations" → "Country setup" menu area.

5

Enter the requested access code (see chapter Access code on page 4) in the

6

input field "Access code country setup" and click the button "Activate".

Adjust the parameters in the individual menu areas taking into account the

7

nationally applicable standards and/or the specifications of the energy pro­vider.

WLAN:

1

Open the access point by touching the sensor once → Communication LED:
flashes blue.

5

Establish the connection to the inverter in the network settings (the inverter

169.254.0.180

21

open access point

2

is displayed with the name "FRONIUS_PILOT" and the serial number of the
device).

Password: enter 12345678 and confirm.

3

IMPORTANT!

To enter the password on a Windows 10 operating system, the link "Connect
using a security key instead" must first be activated to establish a connection
with the password: 12345678.

In the browser address bar, enter and confirm the IP address

4

192.168.250.181.

Select the "Technician" user in the "User menu" and enter and confirm the

5

password for the "Technician" user.

Call up the "Safety and grid regulations" → "Country setup" menu area.

6

Enter the requested access code (see chapter Access code on page 4) in the

7

input field "Access code country setup" and click the button "Activate".

Adjust the parameters in the individual menu areas taking into account the

8

nationally applicable standards and/or the specifications of the grid operator.

Ethernet:

Establish a connection to the inverter (LAN1) with a network cable (CAT5

1

STP or higher).

2

Open the access point by touching the sensor once → Communication LED:
flashes blue.

In the browser address bar, enter and confirm IP address 169.254.0.180.

3

Select the "Technician" user in the "User menu" and enter and confirm the

4

password for the "Technician" user.

Call up the "Safety and grid regulations" → "Country setup" menu area.

5

Enter the requested access code (see chapter Access code on page 4) in the

6

input field "Access code country setup" and click the button "Activate".

Adjust the parameters in the individual menu areas taking into account the

7

nationally applicable standards and/or the specifications of the grid operator.

6

Country setup

7

8

Country setup selection

EN

Country setup
selection

Predefined setups can be selected in the "Country setup selection" menu. The
selected country setup for the respective country contains preset parameters
according to the nationally applicable standards and requirements. Depending
on local grid conditions and the specifications of the energy provider, adjust­ments to the selected country setup may be necessary.

Parameter Description

"Country / Region" Selecting the respective country or region limits/

displays the available country setups for the invert­er.

"Country setup" Displays the available setups per country/region.

A setup is a device configuration predefined by
Fronius. The selection of the country setup must be
made in consideration of the applicable standards
or in coordination with the grid operator.

"Rated Frequency (Hz)" The rated frequency is predetermined by the coun-

try setup selection. Changing this parameter affects
the stable operation of the inverter and is therefore
only permitted in consultation with Fronius.

"Rated Voltage (V)" The rated voltage is predetermined by the choice of

the country setup. Changing this parameter affects
the stable operation of the inverter and is therefore
only permitted in consultation with Fronius.

9

General

Startup and Re­connection

These parameters can be used to set the grid monitoring times before the invert­er is switched on.

For the set time, both the mains voltage and the grid frequency must be within
the permissible range before connection is allowed.

The permissible range for the mains voltage is defined in the menu area

-

"Grid and system protection" → "Voltage" → "Startup and reconnection"

(see chapter Voltage).
The permissible range for the grid frequency is defined in the menu area

-

"Grid and system protection " → " Frequency " → " Startup and reconnec­tion" (see chapter Frequency).

Parameter Range of values Description

"Grid Monitoring
Time Startup"

Parameter Range of values Description

"Grid Monitoring
Time Reconnec­tion"

1 - 900 [s] Grid monitoring time before the invert-

er is switched on during a normal start­up process in seconds (e.g. at sunrise).

1 - 900 [s] Grid monitoring time before the invert-

er is switched back on after a grid fault
(see table "Grid faults") in seconds
(e.g. if a fault occurs in the AC grid dur­ing the day which causes the inverter to
shut down).

The following errors are defined by the inverter as grid errors for this function­ality:

Name Description "StateCode"

name

"Overvoltage" Mains voltage exceeds an

overvoltage limit ("Inner,

Middle, or Outer Limit
Overvoltage").

"Undervoltage" Mains voltage falls below

an undervoltage limit ("In-

ner, Middle or Outer Limit
Undervoltage").

"Overfrequency" Grid frequency exceeds an

overfrequency limit ("In-

ner, Outer or Alternative
Limit Overfrequency").

"Underfre­quency"

Grid frequency falls below
an underfrequency limit
("Inner, Outer or Alternat-

ive Limit Underfre­quency").

"AC voltage
too high"

"AC voltage
too low"

"AC fre­quency too
high"

"AC fre­quency too
low"

"StateCode"

number

1114

1119

1035

1037

10

"Fast Over­voltage Discon­nect"

Triggering of the fast surge
protection (> 135%).

"Grid voltage
too high (fast
overvoltage
cut-out)"

1115, 1116

Name Description "StateCode"

name

"Long Time Aver­age Overvoltage
Limit"

Mains voltage exceeds the
long-term overvoltage lim­it ("Long Time Average

Limit").

"Long-term
mains
voltage limit
exceeded"

"StateCode"

number

1117

EN

"Unintentional Is­landing Detec­tion."

Ramp Rates Ramp rates limit the maximum rate of change of effective power in special situ-

ations. Rising ramps ("Ramp-Up") limit the increase in effective power at the in­verter AC output. Falling ramps ("Ramp-Down") limit the reduction of effective
power at the AC output of the inverter.

Note that the lowest rate of change is applied if there are multiple rate of change
specifications. An "Irradiation Ramp" can thus be rendered ineffective by, for ex-
ample, a lower "Startup Ramp" or another function affecting the rate of change
(e. g., P(U) or P(F)).

"Ramp-Up at Startup and Reconnection"

When connecting the inverter, the maximum rate of change of the effective
power can be limited by a rising ramp with a defined gradient. As soon as the ef­fective power increase is influenced due to the available PV power or another
control, the ramp is terminated.

Parameter Range of values Description

Unintentional islanding
was detected.

"Islanding
detected"

1004

"Ramp-Up at
Startup and Re­connection"

"Ramp-Up at
Startup and Re­connection Rate."

"Ramp-Up/Down Irradiation"

The "Irradiation Ramp" is a permanent limitation of the rate of change for the ef-
fective power. If the PV power changes rapidly due to passing clouds, the rate of
change of the inverter output power is limited with the "Ramp-Up Irradiation

Rate" or the "Ramp-Down Irradiation Rate".

Parameter Range of values Description

"Ramp-Up Irradi­ation"

"Ramp-Up Irradi­ation Rate"

On The effective power is limited at the

"Startup" or a "Reconnection" with a

rate of change of "Ramp-Up at Startup

and Reconnection Rate".

Off The function is deactivated.

0.001 ‑ 100
[%/s]

On The effective power increase is limited

Off The function is deactivated.

0.001 - 200
[%/s]

Permitted rate of change of the effect­ive power at "Startup" or "Reconnec-

tion".

with a rate of change of "Ramp-Up Ir-

radiation Rate".

Permitted rate of change during power
increase.

11

Parameter Range of values Description

"Ramp-Down Ir­radiation"

Note: This func-

tion only has an
effect on invert­ers with storage.

"Ramp-Down Ir­radiation Rate"

Example: Effective power limitation by "Irradiation-Ramp-Up/Down", which was

caused by a change in the available PV power.

On The effective power reduction is limited

with a rate of change of "Ramp-Down

Irradiation Rate".

Off The function is deactivated.

0.001 - 200
[%/s]

Permitted rate of change of effective
power.

"Ramp-Up/Down Communication"

This is a limitation of the effective power rate of change when changing external
specifications for effective power. These can be, for example, power limitations
via I/Os or Modbus commands. If smaller rates of change are specified via Mod­bus command, these are applied. Larger rates are limited by the parameter

"Ramp-Up Communication Rate" or "Ramp-Down Communication Rate".

Parameter Range of values Description

"Ramp-Up Com­munication"

"Ramp-Up Com­munication Rate"

"Ramp-Down
Communication"

On The limitation of the rate of change

(corresponding to "Ramp-Up Commu-

nication Rate") in case of effective

power increase due to an external spe­cification is activated.

Off The function is deactivated.

0.001 ‑ 100
[%/s]

On The limitation of the rate of change

Off The function is deactivated.

Permitted rate of change during power
increase.

(corresponding to "Ramp-Down Com-

munication Rate") in the event of ef-

fective power reduction due to an ex­ternal specification is activated.

12

Parameter Range of values Description

"Ramp-Down
Communication
Rate"

0.001 ‑ 100
[%/s]

Permitted rate of change for power re­duction.

EN

13

Safety

Unintentional Is­landing Detec­tion

Unintentional islanding

In the event of a grid failure or disconnection of a small part of the grid from the
higher-level utility grid, it is possible under special conditions for local loads and
inverters to establish unintentional islanding. If the generation and load (of both
active and reactive power) are balanced, the AC voltage and frequency can re­main within the allowable limits. In this case, the inverter (without additional is­landing detection) will continue feeding energy into the grid, will not automatic­ally shut down, and will supply power to the local loads. This is an unwanted con­dition. To prevent these situations, active or passive islanding detection methods
can be used.

Active islanding detection

The inverter's active islanding detection function detects unwanted islanding
situations, the inverter stops feeding energy into the grid and disconnects from
the AC grid at all poles.
The detection process is carried out using a grid frequency shift method (Active
Frequency Drift): In the event of short-term grid frequency changes, the inverter
feeds in an alternating current with a changed frequency (frequency shift). In the
event of an interruption to the grid, the AC voltage will also change its frequency.
There is a co-feedback effect, whereby the frequency is shifted so much that it
exceeds or falls below the permissible limits. This causes the inverter to stop
feeding energy into the grid.
In the case of three-phase inverters, the method is also able to detect islanding
on any individual phases. This function is an active islanding detection method,
since the inverter specifically changes its feed-in behaviour during the detection
process.

Standard

Parameter Range of values

"Unintentional
Islanding De­tection."

"Quality Factor" 0.1 ‑ 10.0 1.0 The higher this value, the

In contrast, there are passive methods that detect islanding based only on the
measurement of AC network variables. This group includes, for example, "Rate of

Change of Frequency (RoCoF) Protection".

On Active islanding detection

Off Off Active islanding detection

value Description

is activated.

is deactivated.

stronger/more aggressive
the frequency shift of the
island detection.
Higher values therefore
result in shorter island de­tection times. However,
values that are too high
can also have a negative
effect on the voltage qual­ity.

Isolation monit­oring

14

Isolation monitoring ("Iso Monitoring")

The inverter performs an isolation measurement at the DC terminals of the PV
generator before each connection (at least once a day). Isolation monitoring

must be activated for both the isolation warning and the isolation error.

Isolation Warning

The measured value of the isolation monitoring is used for an isolation warning.
Status code 1083 is displayed if the measured value falls below an adjustable
limit value.

Isolation Error

The measured value of the isolation monitoring is also used for isolation error
monitoring. If the measured isolation value is below the limit value "Isolation Er-

ror Threshold", feeding energy into the grid is prevented and status code 1082 is

displayed.

IMPORTANT!

For the "Isolation Monitoring" function, the parameters in the two menu sec­tions described must be configured accordingly.

The parameters below in the menu item "Safety and grid regulations" →

1

"Country setup" → "Safety" → "Isolation monitoring" are used to configure

the parameters for the isolation measurement:

Parameter Range of values Description

"Iso Monitoring
Mode"

On The function is activated.

Off The function is deactivated.

Off (with Warn­ing)

Isolation monitoring is deactivated and
status code 1189 is permanently dis­played on the user interface of the in­verter.

EN

"Isolation Error
Threshold"

0.1 ‑ 10 MOhm If the measured isolation value is lower
than this value, feeding energy into the
grid is prevented (if isolation monitoring
is activated) and status code 1182 is
displayed on the user interface of the
inverter.

The parameters below in the menu item "Device configuration" → "Inverter"

2

→ "Iso warning" are used to configure the parameters for the isolation warn­ing:

Parameter Range of values Description

"Iso Warning"

On The isolation warning is activated.

If the isolation warning threshold is un­dershot, a warning occurs but not a
shutdown.

Off The function is deactivated.

"Isolation meas­urement mode"

Precise Isolation monitoring is performed with

the highest accuracy and the measured
insulation resistance is displayed on the
user interface of the inverter.

Quick Isolation monitoring is performed with

lower accuracy, which shortens the dur­ation of the isolation measurement and
the isolation value is not displayed.

15

Parameter Range of values Description

DC Arc Fault
Protection

"Isolation Warn­ing Threshold"

These parameters can be used to set the behaviour of the arc detection at the
DC terminals of the inverter. The DC Arc Fault Protection function protects
against arc faults and contact faults. Any faults that occur in the current and
voltage curve are constantly evaluated and the current circuit is switched off if a
contact fault is detected. This prevents overheating on defective contacts and
possible fires.

Parameter

"Arc Fault De­tection (AFD)"

0.1 ‑ 10 MOhm If this value is undershot, status code
1183 is displayed on the user interface
of the inverter.

Range of val­ues Description

For activating and deactivating the arc

fault detection. The parameters "Arc log­ging" and "Automatic reconnects" are
only considered with activated "Arc Fault

Detection (AFD)".

Off Arcs are not detected.

Off (with
Warning)

Arcs are not detected and status code
1184 is permanently displayed on the user
interface of the inverter.

"Arc-Fault Cir­cuit Interrupter
(CI)"

On The arc detection is active.

Describes the behaviour in the event of a

detected arc and simultaneously activ­ates/deactivates the integrated self-test.

Off The detection of an arc does not cause the

inverter to shut down and is not displayed
on the user interface of the inverter.

Off (with
Warning)

On If an arc is detected, the inverter inter-

The detection of an arc does not cause the
inverter to shut down. The status code
1185 is permanently displayed on the user
interface of the inverter.

rupts feeding energy into the grid and the
status code 1006 is displayed on the user
interface of the inverter.
Depending on the configuration of the
parameter "Automatic Reconnects", the
inverter will attempt to restart feeding en­ergy into the grid after 5 minutes. Further­more, an integrated self-test is active,
which is executed at regular intervals. If
this fails, the inverter stops feeding energy
into the grid and status code 1009 is dis­played.

16

Parameter

"Automatic Re­connects"

Range of val­ues Description

If more arcs have been detected within 24

hours than are defined in "Automatic Re-

connects", the inverter will not make any

further attempt to start feeding energy in­to the grid. The status code 1006 is dis­played on the user interface of the invert­er after each detection and must be ac­knowledged manually.

Unlimited The 24 hour counter is deactivated. The in-

verter restarts feeding energy into the grid
5 minutes after each arc detected.

EN

0 - No Recon­nection

1 ‑ 4 After a shutdown by an arc, 1, 2, 3 or 4 at-

"Arc Logging" Enables or disables the recording of arc

Off Arc signatures are not recorded.

On Arc signatures are recorded, uploaded to

After an arc has been detected, no further
attempt is made to start feeding energy
into the grid and status code 1173 is dis­played on the user interface of the invert­er.

tempts are made within 24 hours to re­start feeding energy into the grid. After
this number of attempts, no further at­tempt is made to start feeding energy into
the grid and status code 1173 is displayed
on the user interface of the inverter.

signatures. The data is uploaded to the
cloud and used to continuously improve
the interference immunity and fault toler­ance of arc detection.

the cloud, and used to continuously im­prove the interference immunity and fault
tolerance of arc detection.

"Automatic Sig­nal Recording"

Activates or deactivates recording of the

inverter's signal characteristics to continu­ously improve arc detection.

Off Recording is deactivated.

On Recording is activated. With a probability

in accordance with the "Recording Prob-

ability" parameter, data is recorded and

uploaded to the cloud every 10 minutes.

17

Parameter

Range of val­ues Description

"Recording
Probability"

RCMU The inverter is equipped with a universal current-sensitive residual current monit-

oring unit (RCMU) in accordance with IEC 62109-2. This unit monitors residual
currents from the PV module to the AC output of the inverter and disconnects
the inverter from the grid in the event of unauthorised residual current.

Parameter

If "Automatic Signal Recording (ASR)" is

activated, the frequency for a recording
can be set here.

0 No signal characteristics are recorded.

0.0 ‑ 1.0 Every 10 minutes, data is uploaded to the
cloud with a frequency in accordance with
the "Recording Probability".

Example:

With a setting value of 0.1, data is up­loaded on average every 100 minutes.

1 Data is recorded every 10 minutes.

Range of val­ues Description

"RCMU" Off The protective function is deactivated.

Off (with
Warning)

On The protective function is activated.

The protective function is deactivated. The
status code 1188 is permanently displayed
on the user interface of the inverter.

18

Parameter

"Automatic Re­connects"

Range of val­ues Description

If more fault currents have been detected
within 24 hours than are defined in "Auto­matic Reconnects", the inverter will not
make any further attempt to start feeding
energy into the grid. The status code 1076
is displayed on the user interface of the in­verter and must be acknowledged manu­ally.

0 No fault current above 300 mA is toler-

ated. After each detected fault current,
feeding energy into the grid is interrupted
and the status code must be acknow­ledged manually on the user interface of
the inverter.

1 ‑ 4 After a shutdown due to a fault current ex-

ceeding 300 mA, 1, 2, 3 or 4 attempts are
made within 24 hours to restart feeding
energy into the grid. After this number of
attempts, no further attempt is made to
start feeding energy into the grid and the
status code must be acknowledged manu­ally on the user interface of the inverter.

EN

DC Shutdown
Communication

Unlimited The 24 hour counter is deactivated. The in-

verter restarts feeding energy into the grid
after each detected fault current above
300 mA.

Devices for shutdown within the DC generator (e.g. in or on the module or within
a string) can be controlled by the inverter. The condition for this is compatibility,
especially with the communication of the inverter.

Range of val-

Parameter

"Powerline
Communica­tion"

ues Description

Activates and deactivates DC Powerline

Communication (PLC) on the inverter.

PLC Off DC Powerline Communication is deactiv-

ated on the inverter. There are no shut­down devices installed in the PV system,
or if shutdown devices are installed in the
PV system that are waiting for an enable
signal, then this signal must come from
another device (transmitter) (otherwise
the system will not function).

SunSpec PLC The inverter communicates with DC-

Powerline Communication according to
the "SunSpec Rapid Shutdown Standard".
Compatible shutdown devices must be
used for the correct functioning of the PV
system.

19

Interface Protection

Voltage This chapter deals with the protection settings for overvoltage and undervoltage.

Mains voltage limits are defined for this purpose. These depend on the country
setup and can be adjusted as described below.

Each mains voltage limit is defined by:

an undervoltage with associated protection time, or

-

an overvoltage with associated protection time.

-

The protection time describes the duration for which the voltage may be outside
the respective voltage limit value before the inverter switches off with an error
message.
Three overvoltage and three undervoltage limit values can be used. The "Inner

Limits" (U< for undervoltage; U>for overvoltage) refer to those limit values which

are closer to the nominal voltage. The "Middle Limits" (U< for undervoltage;
U>for overvoltage) have a greater distance to the nominal voltage. The greatest
distance between the nominal voltage and the limit value is for the "Outer Lim-

its" (U<< for undervoltage; U>> for overvoltage).

For expedient use of the "Inner Limits" and "Outer Limits", the respective "In-

ner Limit" must be linked to a greater time than the "Outer Limit". If the "Middle
Limits" are also used, their time between "Inner Limit" and "Outer Limit" must

be set, see example in the diagram.

IL "Inner limit" - inner limit value
ML "Middle Limit" - middle limit

value
OL "Outer limit" - outer limit value
(1) Trip range
OV Overvoltage
UV Undervoltage
t

Graphic illustrating the limits

These voltage limit values are not active in backup power mode. Under "Device

configuration" → " Inverter" → "Backup power", the voltage limits that apply in

backup power mode can be configured.

"Inner Limits"

Protection time

x

20

Parameter Description

"Undervoltage U<" Setting value for undervoltage protection U< in [V]

"Undervoltage Time U<" Setting value of time for undervoltage protection

U< in [s]

"Overvoltage U>" Setting value for surge protection U> in [V]

"Overvoltage Time U>" Setting value of time for surge protection U> in [s]

"Middle Limits"

Parameter Description

"Voltage Middle Limits" Activate / deactivate the middle voltage limit values

"On" / "Off"

"Undervoltage U<" Setting value for undervoltage protection U< in [V]

"Undervoltage Time U<" Setting value of time for undervoltage protection

U< in [s]

"Overvoltage U>" Setting value for surge protection U> in [V]

"Overvoltage Time U>" Setting value of time for surge protection U> in [s]

"Outer Limits"

Parameter Description

"Voltage Outer Limits" Activate / deactivate the outer voltage limit values

"On" / "Off"

"Undervoltage U<<" Setting value for undervoltage protection U<< in [V]

"Undervoltage Time
U<<"

"Overvoltage U>>" Setting value for surge protection U>> in [V]

Setting value of time for undervoltage protection
U<< in [s]

EN

"Overvoltage Time U>>" Setting value of time for surge protection U>> in [s]

"Long Time Average Limit"

This function calculates a moving average voltage value over the set time and
compares it with the set overvoltage protection value. If the overvoltage protec­tion value is exceeded, a disconnect occurs.

Parameter Description

"Long Time Average
Limit"

"Overvoltage Averaging
Time U>"

"Overvoltage U>" Setting value of the surge protection with average

"Fast Overvoltage Disconnect"

Fast overvoltage disconnect for voltage spikes that can respond within one peri­od.

Parameter Description

Activate / deactivate the voltage average limit value

"On" / "Off"

Time period over which the average value is calcu­lated in [s]. (If 0 s is set, the check is not active)

value formation U> in [V]

"Fast Overvoltage Dis­connect"

"Fast Overvoltage Dis­connect Time"

"Startup and Reconnection"

Before the inverter is allowed to connect, the connection conditions for voltage

Activate / deactivate fast RMS overvoltage discon­nect (exceeding 135 % of rated voltage) "On" / "Off"

Setting value of time for fast surge protection (peak
value exceeded by 35 %) in [s]. This disconnect can
be configured in the time range of microseconds.

21

and frequency must be fulfilled for a certain time.

A distinction is made between:

"Startup": switching on the inverter during a normal startup process (e. g. at

-

sunrise) and

"Reconnection": the reconnection of the inverter after a grid fault (see table

-

"Grid faults") (e. g. if a fault occurs in the AC grid during the day which

causes the inverter to disconnect).

Which limit values are used when checking the connection conditions depends
on whether a mains fault has occurred and which "Mode" is defined. The "Mode"
only influences the limit values and not the monitoring time. The monitoring time
is determined by the parameters described in "General" / "Startup and Recon-

nection". The monitoring time used depends on whether it is "Startup" or "Re­connection" and applies equally to frequency and voltage limits. After the grid

monitoring has expired, the previously mentioned "Interface Protection" values
are active. In backup power mode these "Startup and Reconnection" parameters
are not active.

Parameter Description

"Mode" The following modes are available:

"Startup Values are used for Startup / Recon-

-

nection Values are used for Reconnection": In

a normal startup process, the startup values
are used as connection conditions. When re­connecting after a mains fault, the reconnec­tion values are used as connection conditions.

"Startup Values are used for Startup and Re-

-

connection": Regardless of the type of con-

nection, the startup values are always used as
connection conditions.

"Reconnection Minim­um Voltage"

"Reconnection Maxim­um Voltage"

"Startup Minimum
Voltage"

"Startup Maximum
Voltage"

The following errors are defined by the inverter as grid errors for this function­ality:

Name Description "StateCode"

"Overvoltage" Mains voltage exceeds an

overvoltage limit ("Inner,

Middle, or Outer Limit
Overvoltage").

"Undervoltage" Mains voltage falls below

an undervoltage limit ("In-

ner, Middle or Outer Limit
Undervoltage").

Lower value of the voltage for reconnection in [V]

Upper value of the voltage for reconnection in [V]

Lower value of the voltage for the normal start pro­cess in [V]

Upper value of the voltage for the normal start pro­cess in [V]

"StateCode"

name

"AC voltage
too high"

"AC voltage
too low"

number

1114

1119

22

Name Description "StateCode"

name

"Overfrequency" Grid frequency exceeds an

overfrequency limit ("In-

ner, Outer or Alternative
Limit Overfrequency").

"AC fre­quency too
high"

"StateCode"

number

1035

EN

"Underfre­quency"

"Fast Over­voltage Discon­nect"

"Long Time Aver­age Overvoltage
Limit"

"Unintentional Is­landing Detec­tion."

Frequency This chapter deals with the protection settings for overfrequencies and underfre-

quencies. Grid frequency limit values are defined for this purpose. These depend
on the country setup and can be adjusted as described below.

Grid frequency falls below
an underfrequency limit
("Inner, Outer or Alternat-

ive Limit Underfre­quency").

Triggering of the fast surge
protection (> 135%).

Mains voltage exceeds the
long-term overvoltage lim­it ("Long Time Average

Limit").

Unintentional islanding
was detected.

"AC fre­quency too
low"

"Grid voltage
too high (fast
overvoltage
cut-out)"

"Long-term
mains
voltage limit
exceeded"

"Islanding
detected"

1037

1115, 1116

1117

1004

Each frequency limit value is defined by:

an underfrequency with associated protection time, or

-

an overfrequency with associated protection time.

-

The protection time describes the duration for which the frequency may be out­side the respective frequency limit value before the inverter switches off with an
error message. Two overfrequency and two underfrequency limit values can be
used. The "Inner Limits" (f< for underfrequency; f>for overfrequency) are those
limit values which are closer to the rated frequency than the "Outer Limits" (f<<
for underfrequency; f>> for overfrequency). For the sensible use of both ranges,
the respective "Inner Limit" must be linked to a larger time than the "Outer Lim-

it".

23

IL "Inner limit" - inner limit value
OL "Outer limit" - outer limit value
(1) Trip range
OF Overfrequency
UF Underfrequency

Graphic illustrating the limits

In backup power mode, the inverter itself determines the frequency and the fre­quency limits are therefore not active.

"Inner Limits"

Parameter Description

"Underfrequency f<" Setting value of underfrequency protection f< in

[Hz]

"Underfrequency Time
f<"

Setting value of time for underfrequency protection
f< in [s]

"Overfrequency f>" Setting value of overfrequency protection f> in [Hz]

"Overfrequency Time
f>"

Setting value of time for overfrequency protection
f> in [s]

"Outer Limits"

Parameter Description

"Frequency Outer Lim­its"

Activate / deactivate the outer frequency limits

"On" / "Off"

"Underfrequency f<<" Setting value of underfrequency protection f<< in

[Hz]

"Underfrequency Time
f<<"

Setting value of time for underfrequency protection
f<< in [s]

"Overfrequency f>>" Setting value of overfrequency protection f<< in

[Hz]

24

"Overfrequency Time
f>>"

Setting value of time for the overfrequency protec­tion f>> in [s]

"Alternative Limits"

For the inner frequency limit values there is an additional second parameter set,
which is only relevant for Italy. In order to activate this second parameter set, the
alternative frequency limit value must be set to "On" on the user interface of the
inverter and activated/deactivated via an external signal as follows:

Activate: http://<IP>/status/SetSignaleEsterno

-

Deactivate: http://<IP>/status/ClearSignaleEsterno

-