Steca coolcept-x StecaGrid 1500x, coolcept StecaGrid 1500, coolcept StecaGrid 3010, coolcept StecaGrid 2000, coolcept StecaGrid 2500 Installation And Operating Instruction
...
coolcept coolcept-x
Installation and operating instructions
EN
747.431 | Z09.2 | 2016-02-18
EN
Table of contents
1 Preface................................................................................. 4
2 General information........................................................... 5
3 Structure and function..................................................... 12
4 Installation........................................................................ 31
5 Operation.......................................................................... 49
6 Self test.............................................................................. 60
7
8 Maintenance and disposal............................................... 69
9 Technical data................................................................... 70
2.1 General safety instructions........................................... 5
2.2 Identification................................................................ 6
2.3 Scope of delivery.......................................................... 8
2.4 Intended use................................................................ 8
2.5 About this manual....................................................... 9
3.1 Housing...................................................................... 12
3.2 Operating buttons..................................................... 14
3.3 Display....................................................................... 14
3.4 Cooling...................................................................... 21
3.5 Grid monitoring......................................................... 22
3.6 Data communication.................................................. 22
4.1 Safety measures during installation........................... 31
4.2 Mounting the inverter................................................ 33
4.3 Prepare AC connection............................................... 35
4.4 Prepare DC connections............................................. 37
4.5 Preparing the data connection cable.......................... 38
4.6 Connecting the inverter inverter and switching the
AC on......................................................................... 38
4.7 Initial commissioning of the inverter.......................... 39
4.8 Feed-in management................................................. 46
4.9 Switch on DC............................................................. 47
4.10 Deinstalling the inverter........................................... 47
5.1 Overview of operating functions................................ 49
5.2 General operating functions...................................... 50
5.3 Important operating functions................................... 50
5.4 Internet portal............................................................ 53
Fault rectification.............................................................. 63
8.1 Maintenance.............................................................. 69
8.2 Disposal..................................................................... 69
9.1 Inverter...................................................................... 70
9.2 AC cables and line circuit breakers............................. 81
9.3 Country table............................................................. 82
2
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EN
10 Liability, commercial guarantee, legal guarantee.......... 83
Contact.............................................................................. 84
11
Appendix........................................................................... 85
A Assembly...................................................................... 86
A.A Bore dimension drawing for coolcept devices........... 86
A.B Bore dimension drawing for coolcept-x devices......... 87
A.C AC plug...................................................................... 88
A.D Phoenix Contact SUNCLIX (DC connector)................. 91
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3
EN
1 Preface
Thank you for choosing inverters from the coolceptproduct line of
Steca Elektronik GmbH . By using solar energy, you are making a
significant contribution to environmental protection; by reducing the
amount of carbon dioxide (CO2) and other harmful gases that
burden the earth's atmosphere.
Maximum efficiency with a long service life
The innovative inverter topology is based on a single-stage
transformer-less circuit concept and is integrated into all devices in
the coolcept series. This unique technology allows peak efficiencies
of 98,0 %
or 98,6 % to be achieved. Depending on the type, the
European efficiency of the devices is also significantly greater than
98 % and sets new standards in photovoltaic grid-feed systems.
A new and unique cooling concept inside the inverter ensures an
even distribution of heat and a long service life.
Designer casing and easy installation
For the first time, the very high efficiency allows the use of a
designer casing made of plastic for the coolcept inverters. This offers
many advantages. The surface temperatures of the devices overall
remains extremely low. In addition, there are clear benefits for the
installation. The coolcept-x inverters have a sturdy metal casing that
allows them to be also used outdoors.
The lightweight devices weigh only 9 or 12 kg and can be easily and
safely mounted on a wall. The supplied wall bracket and practical
recessed grips for right and left handed installers make mounting of
the device simple and convenient. All connections and the DC circuit
breaker are externally accessible.
Visualization and accessories
The devices have a graphic display, with which the energy load
values, actual capacities, and operating parameters of the
photovoltaic system can be visualized. The innovative menu offers
the possibility of individual selection of the different measured
values.
www.stecasolar.com for further information on accessories.
See
Your installer can, of course, also give you more information about
the options and accessories that are available.
4
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2 General information
2.1
General safety instructions
n This document is part of the product.
n Install and use the device only after reading and understanding
this document.
n Always perform the measures described in this document in the
sequence specified.
n Keep this document in a safe place for the entire service life of
the device. Pass the document on to subsequent owners and
operators of the device.
n The yield of the system can be reduced through improper
operation
n If the housing is damaged, do not connect the device to the DC
or AC lines
n If one of the following components is damaged, immediately
take the device out of operation and disconnect it from the
mains grid and PV generators.
– Device (not functioning, visible damage, smoke,
– Lines
– PV generators
Do not switch the system on again before
– the device has been repaired by a dealer or the
– Damaged cables or PV generators have been repaired by a
n Never cover the device
n Do not open the casing: Risk of death. Invalidation of the
guarantee.
n Factory labels and markings must never be altered, removed or
rendered unreadable.
n Comply with the instructions of the respective manufacturer
when you connect an external component that is not described
in this document (e.g. external data loggers). Components that
are incorrectly connected can damage the device.
EN
:
penetration of liquid etc.)
manufacturer,
technical specialist.
747,431 | Z09.2 | 18/02/2016
5
EN
Safety information on
the device (coolcept
Indoor)
Safety information on
the device (coolcept
Indoor)
①
Dangerous voltages can remain present on the components up
to 10minutes after switching off the DC circuit breaker and the
line circuit breaker.
②
Read and follow the manual!
③
Serial number as a bar code and in plain text
①
Caution: Surface may be hot
②
Dangerous voltages can remain present on the components up
to 10minutes after switching off the DC circuit breaker and the
line circuit breaker.
③
Read and follow the manual!
④
Serial number as a bar code and in plain text
2.2 Identification
Feature Description
Types coolcept (plastic housing): StecaGrid 1500,
Version status of the
manual
Manufacturer's address
6
StecaGrid 2500, StecaGrid 3010, StecaGrid 3600, StecaGrid 4200
coolcept-x (stainless steel housing): StecaGrid 1500x,
StecaGrid 2000x, StecaGrid 2500x, StecaGrid 3010x,
StecaGrid 3600x, StecaGrid 4200x
Z09
Ä
Chapter 11 ‘Contact’ on page 84
See
StecaGrid 2000,
747,431 | Z09.2 | 18/02/2016
Feature Description
1
7
2
3
4
5
6
8
⑨
Certificates See Appendix ⇒ Certificates and
www.stecasolar.com ⇒ coolcept – coolcept-x
Optional accessories
n External data loggers:
– WEB‘log from Meteocontrol
– Solar-Log from Solare Datensysteme
n Termination plug for RS485 bus
–
IP21: 752,856
– IP65: 740,864
Rating plate
①
Bar code for internal use
②
Protection class
③
Technical data of the DC input
④
Article number and product designation
⑤
Manufacturer's address
⑥
Cover the Protection class II and CE mark
⑦
Country of manufacture
⑧
Technical data of the AC output
⑨
Standard for grid monitoring
Notice
– For Australia only: Cover the
Protection class II
described on
Protection class II symbol on the type plate. ’
on page 33.
– For the serial number, see
on the device (coolcept Indoor)’ on page 6 and
Ä
‘Safety information on the device (coolcept
Indoor)’ on page 6
– For the position of the type plate, see
3.1 ‘Housing’ on page 12.
symbol on the type plate, as
Ä
‘ For Australia only: Cover the
Ä
‘Safety information
Ä
EN
Chapter
EU Declaration of
Conformity
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The products described in this document comply with the applicable
European directives. Certificates for the products are provided at
www.stecasolar.com ⇒ PV GRID CONNECTED ⇒ Grid inverters
7
EN
2.3 Scope of delivery
n Inverter ①, type coolcept (plastic housing) or coolcept-x
(stainless steel housing, IP65)
n Mounting plate ② for type coolcept or coolcept-x
n AC plug ③
n 1 pair SUNCLIX plug-in connectors ④
n 3 sealing caps (for RJ45 socket; only coolcept-x) ⑤
n Brief installation and operating instructions ⑥
①
②
2.4 Intended use
⑥
③
n The inverter must only be used in grid-coupled photovoltaic
systems. The inverter is suitable for all PV generator with
connections that do not need to be grounded.
n PV generator must be used that have an IEC 61730 class A
rating because the inverter does not have electrical isolation.
n If the maximum AC operating voltage is higher than the
maximum system voltage of the photovoltaic generator, then
PV generator must be used that have a maximum system
voltage that is higher than the AC grid voltage.
Notice
An overview of suitable PV generators is available at
www.stecasolar.com
Service and support.
④
Þ
⑤
PV GRID CONNECTED
Þ
8
747,431 | Z09.2 | 18/02/2016
375 V
−350 V
DC (+)
DC (−)
U
t
0 V
U
P
V
= 350 V
375 V
−75 V
DC (+)
DC (−)
U
t
0 V
U
P
V
= 75 V
125 V
−160 V
DC (+)
DC (−)
U
t
0 V
−320 V
UPV = 125 V
180 V
−180 V
−250 V
250 V
320 V
0 V
−320 V
U
t
UPV = 500 V
DC (+)
DC (−)
175 V
−175 V
−275 V
275 V
320 V
U
t
0 V
−320 V
U
PV
= 350 V
DC (+)
DC (−)
175 V
−175 V
−275 V
275 V
320 V
0 V
−320 V
U
t
UPV = 550 V
DC (+)
DC (−)
Potential curves of the
plus (+) and minus (–) DC
connections with respect
to PE
UPV = Potential between the
plus (+) and minus (–) DC‑connections
StecaGrid 1500/2000 and 1500x/2000x
Fig. 1: Potential curves of UPV at 75 V (left) and 350 V (right)
StecaGrid 2500/3010 and 2500x/3010x
EN
2.5 About this manual
Contents
2.5.1
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Fig. 2: Potential curves of UPV at 125 V (left) and 500 V
StecaGrid 3600/4200 and 3600x/4200x
Fig. 3: Potential curves of UPV at 350 V (left) and 550 V
This manual describes the inverters of the types coolcept and
coolcept-x. The points at which the types differ are marked in the
text.
(right)
(right)
9
EN
2.5.2
Target group
2.5.3 Designations
Symbols
This manual contains all information that a specialist needs to set up
and operate the inverters. Follow the instructions of the respective
manufacturers when installing other components (e.g. PV generator,
cables).
Unless otherwise indicated, the target audiences of this manual are
technical professionals and system operators. Technical professionals
are, for example:
n Persons who have the knowledge of terminology and the skills
necessary for setting up and operating photovoltaic systems.
n Persons who have the necessary training, knowledge and
experience, and knowledge of the applicable regulations in
order to evaluate and recognise the dangers inherent in the
following work:
–
Installation of electrical equipment
– Production and connection of data communication cables
– Production and connection of mains grid power supply
cables
The following table contains the symbols used in this manual
Warning signs Type of danger
Warning – high-voltage.
Symbols used on the
device
10
Warning – danger zone.
The following table contains the symbols used on the device.
Cover the Description
Danger from electricity.
Read the manual before using the product.
747,431 | Z09.2 | 18/02/2016
Signal words
Keywords used in conjunction with the symbols described:
Signal word Meaning
DANGER! This combination of symbol and
signal word indicates an
immediate dangerous situation
that will result in death or
serious injury if it is not
avoided.
WARNING! This combination of symbol and
signal word indicates a possible
dangerous situation that can
result in death or serious injury
if it is not avoided.
NOTICE! This combination of symbol and
signal word indicates a possible
dangerous situation that can
result in material and
environmental damage if it is
not avoided.
Abbreviations
Abbreviation Description
Derating Power reduction
DHCP DHCP automatically integrates the device in an existing network
(acronym: Dynamic Host Configuration Protocol)
MSD Internal grid monitoring of the inverter (English: Mains monitoring with
allocated Switching Devices).
MPP Working point producing the most power (English: maximum power
point)
MPP tracker Controls the power of the connected module strings to match the MPP
SELV, TBTS, MBTS Schutzkleinspannung (EN: Safety Extra Low Voltage; FR: Très Basse
Tension de Sécurité; ES: Muy Baja Tensión de Seguridad)
V
PV
The PV generator voltage present at the DC connection (photovoltaic
voltage)
EN
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11
11
2
3
14
16
8 7 15
11
10
9
EN
3 Structure and function
3.1
Housing
3.1.1 coolcept
①
Hood
②
Display (monochrome, 128 x 64 pixels)
③
Rating plate, serial number, warnings
④
Operating buttons: ESC, r, s, SET (from left to right)
⑤
1x AC connection
⑥
1x DC connection Minus (−) for PV generator (Phoenix Contact
SUNCLIX, touch protection)
⑦
1x DC connection Plus (+) for PV generator (Phoenix Contact
SUNCLIX, touch protection)
⑧
DC load-break switch (disconnects plus and minus input
simultaneously)
⑨
2 x RJ45 sockets (RS485 bus)
⑩
1x RJ45 socket (Ethernet)
⑪
1x RJ10 socket (Modbus RTU)
The housing components are described in detail below.
12
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3.1.2 coolcept-x
11
2
3
14
89 6711151
10
1213
①
Hood
②
Display (monochrome, 128 x 64 pixels)
③
Rating plate, serial number, warnings
④
Operating buttons: ESC, r, s, SET (from left to right)
⑤
1x AC connection
⑥
Pressure equalization membrane
⑦
1x RJ45 socket (RS485 bus)
⑧
1x DC connection Minus(−) for PV generator (Phoenix Contact
SUNCLIX, touch protection)
⑨
1x RJ45 socket (RS485 bus)
⑩
1x DC connection Plus(+) for PV generator (Phoenix Contact
SUNCLIX, touch protection)
⑪
1x RJ45 socket (Ethernet)
⑫
DC load-break switch (disconnects plus and minus input
simultaneously, can be safeguarded with a padlock)
⑬
Bore for optional attachment of a grounding element or
mechanical fastening element (securing chain)
The housing components are described in detail below.
EN
747,431 | Z09.2 | 18/02/2016
13
EN
3.2 Operating buttons
The operating buttons ④ in Ä Chapter 3.1.1 ‘coolcept’ on page 12
and in
functions:
Ä
Chapter 3.1.2 ‘coolcept-x’ on page 13 have the following
Button Action
ESC
r
s
SET
Press briefly Goes to the next higher menu
Press longer
(≥ 1 second)
Press briefly
Press briefly
Press briefly Goes to the next lower menu
Press longer
(≥ 1 second)
Function
General guided operation
level
Discards any changes
Goes to the status display Jumps to the start of the
n Moves the marking bar or the display content upward
n In a numeric setting, moves the marking 1 position to the
left
n Increases an adjustment value by 1 increment
n Moves the marking bar or the display content downward
n In a numeric setting, moves the marking 1 position to the
left
n Increases an adjustment value by 1 increment
level
n a selected numerical value starts flashing and can be
changed
n adopts a change
n changes the state of a control element (check box/radio
button)
Answers a query dialog with
Yes
Navigates 1 step back
guided configuration process
—
Goes 1 step back
3.3 Display
3.3.1
14
General information
Ä
For the presentation on the display (② in
on page 12 and
n Symbol
data, it cannot process any user inputs. The resulting waiting
time is indicated by the animated sun symbol.
n Errors are indicated by a red flashing backlighting. An event
message is also displayed at the same time.
Ä
Chapter 3.1.2 ‘coolcept-x’ on page 13)
: While the inverter is processing large volumes of
Chapter 3.1.1 ‘coolcept’
747,431 | Z09.2 | 18/02/2016
Notice
3
4
2
2
7 8
9
5 6
1
F
The display reacts slower at very low temperatures. In
particular, this can apply for coolcept-xdevices if they
are used outdoors.
EN
3.3.2 Information
Status display
Numeric yield (day,
month, year)
The information shown on the display is described below using
illustrative examples.
The status display shows the following values:
①
Measurement name
②
Measurement with units
③
Date is displayed alternatingly with IP address
④
Cover the Non-confirmed event messages; more information on
this is provided in Section
⑤
Animated symbol Connect symbol with 2‑digit inverter address;
Ä
‘Event messages’ on page 64
indicates data traffic on the RS485 bus.
⑥
Cover the Power reduction (Derating)
⑦
Cover the Fixed voltage mode activated
⑧
Time
⑨
IP address of the device when a network connection has been
established, display alternates with ③ – ⑦
The following applies to the status display:
n The measurements shown in the status display are defined
under Settings ▶ Meas. values. Some measurements are
always displayed (default setting).
n Current values are not displayed at night (solar irradiation too
low; example in Fig. left).
n The CO2 saving shown in the status display are calculated
using the savings factor 508 g/kWh .
Daily, monthly and annual yields can be displayed numerically in a
list.
①
Yield period (day/month/year)
②
Individual yields with period and value (1 per row)
The yield periods contain the following numbers of individual
entries:
n Day yield: last 31 days
n Monthly yield: last 13 months
n Annual yield: last 30 years
1)
A yield value of 0 is shown when the inverter was not yet installed
1)
1)
1)
at that time.
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15
EN
Graphical yield (day,
month, year)
Event messages
PV generator
characteristic curve
Information
Daily, monthly and annual yields can be displayed graphically in a
chart.
①
Period on an individual yield (here: day yield)
②
Y axis 1) 2)
③
X axis: Time in hours/days/months/years
④
Total of all individual yields shown in the diagram, in kWh
3)
The graphical representation can show annual yields for the last 20
years.
1)
Yield in kWh
2)
With addition of ‘M’ : : yield in MWh
3)
The scaling changes depending on the maximum value.
Ä
Chapter 7 ‘Fault rectification’ on page 63
①
X axis: input voltage in V
②
Y axis: power in kW
③
Peak = MPP
If the ‘Ch. Curve’ menu item is called, the inverter records the PV
generator characteristic curve and then displays it (Fig. upper left).
The following applies:
n The inverter traverses the input voltage range and records the
power generated over this range. Duration: a few seconds;
is
displayed.
n The MPP is at the peak of the PV generator characteristic curve.
n This peak and the PV generator characteristic curve change with
the level of solar irradiation.
The menu item Information contains the following sub-menu
items.
n Contact info
n System info (see Fig. left):
–
Product designation
– Serial number of the inverter
– Information concerning the software and hardware version
of the inverter (see sample ① in Fig. left)
– Inverter address
– Version of the manual that belongs with the inverter
n Country setting: country that is currently set and country-
specific grid parameters; see also
Ä
Chapter 9.3 ‘Country table’
on page 82.
n Reactive power characteristic curve: Diagram of the
reactive power characteristic curve (only if prescribed for the set
country)
16
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3.3.3
Settings
Numerical settings
Selection of the
measurements
n Network: Network parameters, partially configurable under
Settings ▶ Network
– Host name: Unique name in the network
– DHCP status: DHCP on/off
– Link status: Status of the network connection
– IP address: IP address of the inverter
– Subnet mask: Subnet mask of the inverter
– Gateway: IP address of the network gateway
– DNS address: IP address of the DNS server
– MAC address: Hardware address of the inverter
n Results of the last self-test (only if in the country setting Italy is
set)
When performing numerical settings of remuneration and dates, the
following applies:
Remuneration
n Possible currencies: £ (Pounds), € (Euros), kr (Krones), none.
n The maximum value that can be set for remuneration is limited
for technical reasons. The remuneration must be set using
different units as required. Example: Dollars instead of Cents
(set currency to none ).
①
Designation of the numerical setting
②
Value to be set; the selected value to be set is highlighted in
black.
Date
When setting the month/year, a check is performed to ensure that
the selected day is valid. If not, then the day is automatically
corrected.
Example: 31.02.2011 is corrected to 28.02.2011.
Selection of the measurements to be shown in the status display.
The following measurements can be selected:
n Output power: Inverter output power
1)
n Current day yield: Day yield since 0:00
n PV voltage: The voltage supplied by the PV generators
n PV current: The current supplied by the PV generators
n Grid voltage: Voltage at the inverter connection
1)
n Grid current: The current fed into the mains grid
n Grid frequency: The frequency of the public grid
n Internal temperature: Internal temperature of the inverter
n Derating Reason for derating
n Max. daily power: The maximum power supplied in the
current day
n Abs. max. power: The maximum power ever fed into the
grid
3)
3)
2)
EN
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17
EN
Acoustic alarm
Backlight
TCP/IP network
n Max. daily yield: The maximum daily yield achieved
3)
n Operating hours: The operating hours during which the
device has been connected to the grid (including night-time
hours).
n Total yield: Yield since commissioning
n CO2 savings: CO2 savings achieved since commissioning
1)
Measurement is always displayed (cannot be switched off)
2)
Possible causes:
– Internal temperature too high
– User default Power limiter
– Frequency too high
– Controlled by grid operator (feed-in management)
– Delayed increase in power after starting
3)
Can be reset to 0 via Settings ▶ Reset max. vals.
An acoustic alarm sounds (approx. 4.5 kHz) when an event message
is displayed.
n 2 Sounds: Warning
n 3 Sounds: Error
The acoustic alarm is switched off with the factory default settings.
n off
n automatic: Switches on for 30 seconds when a button is
pushed
n Grid feed: (factory setting)
– Not feeding: Switches on for 30 seconds when a button is
pushed; then switches off
– Feeding: Switches on for 30 seconds when a button is
pushed; then dims
Notice
– A prerequisite for this is that you know the
parameters required for setting up the TCP/IP
network connection. Consult (further) technical
professionals if required.
– DHCP is activated in the device ex-works. This
allows automatic integration of the device in
most networks.
18
Network settings, required for network communication, e. g. with an
Internet portal:
n DHCP: Switch DHCP on/off
n IP address: IP address of the inverter
n Subnet mask: Subnet mask of the inverter
n Gateway: IP address of the network gateway
747,431 | Z09.2 | 18/02/2016
3.3.4
Service menu
Power limiter
n DNS address: IP address of the DNS server
n web-portal: Settings at the web portal
– Web portal setting: Disabling of data transmission
and selection of a web portal
– Re-transmission: Data in the inverter is transmitted a
second time
– Connection check: Checks the internet connection and
indicates the result
The service menu items are described below. Some items are
Ä
password protected; see
further information on page 49 (menu
structure)
You can obtain the password from technical support; see
Ä
Chapter
11 ‘Contact’ on page 84.
NOTICE!
Risk of reduced yields. In the service menu, inverter
and grid parameters can be changed. The service
menu must only be operated by a specialist, who
ensures that the change does not violate applicable
regulations and standards!
The inverter output power can be manually limited to a minimum of
500 W. When the power is manually limited, the Power reduction
symbol is shown in the status display and the ‘Derating’ / ‘Cause:
User default’ measurement is displayed.
EN
Fixed voltage
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The device can regulate the input voltage to a manually adjustable
value. This switches off the automatic setting of the MPP (MPP
tracking). The input voltage can be adjusted over a range between
the maximum and minimum input voltage and the minimum input
voltage in 1V steps.
Exemplary application: Hydroelectric installation
NOTICE!
Before setting a fixed input voltage, make sure that
the PV generator is suitable for this. Otherwise, this
may result in yield losses or damage to the system.
19
EN
Delete country setting
Factory setting
Voltage limits (peak
value)
After the country setting has been deleted the device restarts anew
and displays the guided 1st commissioning menu.
Resetting the device to the factory setting deletes the following
data:
n Yield data
n Event messages
n Date and time
n Country setting
n Display language
n Network settings
After the factory setting has been deleted, the device restarts anew
and displays the guided 1st commissioning menu.
The following voltage limits can be changed:
n Upper disconnection value
1)
n Lower disconnection value1) (Fig. left)
1)
The disconnection value relates to the peak value of the voltage.
Frequency limits
Voltage limits ø (average
value)
Reactive power
characteristic curve
20
The following frequency limits can be changed:
n Upper disconnection value
n Lower disconnection value (Fig. left)
n Derating switch-on threshold (because frequency is too high)
n Frequency threshold when switching on again
The following voltage limits can be changed:
n Upper disconnection value1) (Fig. left)
n Lower disconnection value
1)
The disconnection value relates to the average value of the
1)
voltage.
Overview:
747,431 | Z09.2 | 18/02/2016
All parameters
The reactive power characteristic curve must be set during 1st
commissioning if this is prescribed for the previously selected
country. The following applies:
n 3 characteristic curves are available for selection (Fig. left):
– Default. char. curve (pre-defined)
– Enter char. curve (manually adjustable)
– Char. curve cos φ = 1 (pre-defined)
n After configuration, the characteristic curve is displayed as a
graph (example in Fig. left).
① x-axis, output power P in %
② y-axis, phase shift cos φ
③ Nodes (in example: 4 nodes)
④ Arrow symbol Overexcitation
⑤ Arrow symbol Underexcitation
Technical details
n Each characteristic curve is defined by 2 to 8 nodes.
n A node is defined by the output power P of the inverter (x-axis)
and the associated phase shift (y-axis).
n The phase shift can be set over a range of 0.95 (overexcitation)
through 1.00 (no phase shift) to 0.95 (underexcitation).
n The type of phase shift is shown in the graph using arrow
symbols defined as follows (defined from the point of view of
the inverter):
Overexcitation, inductive
Underexcitation, capacitive
n The 3 characteristic curves available for selection have the
following properties:
Default char. curve: pre-defined according to the selected
country (example in Fig. left).
Char. curve
φ = 1: pre-defined with cos φ =
constantly 1.00. This characteristic curve must be selected if no
reactive power control is to be performed on the device.
Enter char. curve: The number of nodes and their x/y
values can be configured. Exceptions: The first node is always at
x (P %) = 0 %, the last always at x (P %) = 100 %.
Service technicians can use this menu item for changing additional
MSD parameters.
EN
3.4 Cooling
747,431 | Z09.2 | 18/02/2016
The internal temperature control system prevents excessive
operating temperatures. When the internal temperature is too high,
the inverter adjusts the power consumption from the PV generators
to reduce the heat dissipation and operating temperature.
21
EN
Grid monitoring
3.5
The inverter is convection cooled via fins on the front and rear side.
A maintenance-free fan circulates the heat within the closed housing
evenly over the entire surface of the housing.
The inverter constantly monitors the mains grid parameters while
feeding the grid. If the grid deviates from the legally prescribed
specifications then the inverter automatically switches off. When the
grid conforms to the legally prescribed specifications then the
inverter automatically switches on again.
3.6 Data communication
The device has the following communication interfaces:
n 1x RJ45 socket (Ethernet for TCP/IP network) for
communication, e. g. with a central data server
n 2x RJ45 sockets (RS485 bus) for communication with external
devices, e. g. a data logger
n 1x RJ10 socket (Modbus RTU) for communication e. g. with an
external energy counter
3.6.1 Data
Displayed data
Logged data (EEPROM)
The inverter can transmit a wide range of data to other devices.
Some of this data is shown on the display and certain data is stored
in the internal memory (EEPROM) as described below.
n Voltage and current of the PV generator
n Power and current fed into the grid
n Voltage and frequency of the power grid
n Energy yields on a daily, monthly and annual basis
n Error conditions, notes
n Version information
n Event messages with date
n Energy yields on a daily, monthly and annual basis
The storage resolution of the energy yield data is as follows:
Energy yield data Storage resolution/period
10-minute values 31 days
Daily values 13 months
Monthly values 30 years
Annual values 30 years
Total yield permanent
22
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3.6.2 Network (TCP/IP)
EN
The device can transfer yield data and event messages via the TCP/IP
interface to the Internet portal http://www.solare-energiewende.de
server. The yield data can be displayed graphically in the Internet
portal as illustrated below. This service is free of charge for a period
of 2 years from the time of registration. The following applies:
n Before the Internet portal can be used, the user must go to
www.steca.com/portal to register. See more
Ä
Chapter 5.4
‘Internet portal’ on page 53
n The local network settings must be set at the inverter in order to
establish a connection to the Internet portal server. This can be
performed automatically or manually:
Automatically: If IP addresses are automatically assigned in
your network (DHCP), then no settings need to be made at the
inverter.
Manually: If IP addresses are not automatically assigned in your
network, then you must manually set the inverter network
settings via Settings ▶ Network; see
Ä
‘TCP/IP network’
on page 18
n The address of the Internet portal server is permanently stored
in the inverter and cannot be changed.
n Once the network connection is established, the inverter
automatically starts non-encrypted transmission of data to the
server.
Notice
The network cable must be disconnected in order to
prevent transmission of the data, or data transmission
must be disabled according to
Ä
‘TCP/IP network’
on page 18.
747,431 | Z09.2 | 18/02/2016
Fig. 4: Graphical representation of the yield data in the Internet
portal
23
EN
Furthermore, you can use the TCP/IP interface to display yield data
and other information as HTML pages. You need a PC connection to
indicate the data. The HTML pages can be displays by means of a
browser, such as Mozilla Firefox. To enable the connection, enter the
IP address of the inverter (see inverter status indication) in the
browser.
Fig. 5: Example for an IP address
3.6.3 RS485 bus
24
Fig. 6: Example 1 of an HTML page
Fig. 7: Example 2 of an HTML page
The inverter communicates with other devices via an RS485 bus. The
following applies: The following applies:
747,431 | Z09.2 | 18/02/2016
n The inverter has two RS485 interfaces (RJ45 sockets) on the
lower side of the casing.
n The beginning and end of the RS485 bus must be terminated;
see
Ä
Chapter 3.6.5 ‘RS485 termination’ on page 28.
n Standard RJ45 cables can be used as bus cables (Cat-5 patch
cables, not supplied). Use an alternative data connection cable
for longer connections; see
Ä
Chapter 3.6.4 ‘Alternative RS485
data connection cable’ on page 28.
n The inverters connected to the RS485 bus operate as slaves.
Notice
The following inverters have compatible data
interfaces and can be connected to the RS485 bus as
slaves:
– StecaGrid 2020
– StecaGrid 1500, 1800, 2000, 2300, 2500, 3010,
3000, 3600, 4200 and StecaGrid 1500, 1800x,
2000x, 2300x, 2500x, 3010x, 3000x, 3600x,
4200x
– StecaGrid 8000 3ph
, StecaGrid 10000 3ph
– StecaGrid 8000+ 3ph, StecaGrid 10000+ 3ph
Comply with the instructions in the manuals of these
devices relative to addressing, termination, and
approved data cables.
EN
747,431 | Z09.2 | 18/02/2016
25
81
EN
Notice
If in the country setting Italy is set, then the RS485
bus must be connected as follows to enable control
through an external device in accordance with
CEI 0-21.
– External fast switch-off (ital.: Teledistacco): If the
lines 31) and 81) of the RS485 bus2) are
connected, e. g. via an external relay, the
following applies:
Relay closes: The inverters on the bus
disconnect themselves from the network.
Relay opens: The inverters connected on the
network connect themselves to the network
(regular operation).
– Switch-over of the grid frequency disconnection
thresholds (Ital.: Modalità definitiva di
funzionamento del sistema di protezione di
interfaccia (impiego del SPI sulla base di letture
locali e di informazioni/comandi esterni)): If the
lines 51) and 81) of the RS485 bus2) are
connected, e. g. via an external relay, the
following applies:
Relay closes: The inverters connected on the bus
set the switch-off thresholds in accordance with
CEI 0-21 to 47.5 Hz and 51.5 Hz.
Relay opens: The inverters connected on the
bus set the switch-off thresholds in accordance
with the country setting Italy ;
Ä
Chapter 9
‘Technical data’ on page 70
We recommend that you integrate the wiring of lines
3, 5, and 8 in the bus termination.
1)
Contact assignment of the RJ45 plug for the RS485
bus: See
2)
‘Housing’ on page 12 and
Fig. 8.
In this regard, see
⑥
under Ä Chapter 3.1
⑦
and ⑨ under Ä Chapter
3.1 ‘Housing’ on page 12.
Fig. 8: Contact assignment (= line number) of the RJ45 plug
Optionally one (!) of the following masterdevices can be connected
to the RS485 bus. The devices support the transfer protocol used by
the inverter.
26
747,431 | Z09.2 | 18/02/2016
n Energy management unit StecaGrid SEM: Interface to a ripple
1
2
3
4
5
5
5
RS485
RS485 RS485
control receiver for EEC-compliant feed-in management
n PC or notebook (with suitable software):
– Read inverter information using the "StecaGrid User" read
out software. This is available on our homepage see http://
www.steca.com/index.php?StecaGrid_User_de
– Connection to the inverter via optional adapter
RS485⇔USB is possible; the adapter is available from Steca
under Article Number 746.610 (IP21) or 737.707 (IP65).
– Load firmware updates (for technical professionals only)
n External data loggers, recommended by Steca for professional
system monitoring:
– WEB‘log (Meteocontrol)
– Solar-Log (Solare Datensysteme)
– Energy-Manager (Kiwigrid GmbH)
Note
The settings must be made on the external data
loggers as specified by the manufacturer, before
connecting.
The wiring diagram of the RS485 bus is shown below.
EN
Fig. 9: Wiring diagram
①
External data logger
②
First inverter
③
Inverter
④
Last inverter, terminated
⑤
RJ45 standard cable (patch cable)
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27
EN
3.6.4 Alternative RS485 data connection cable
NOTICE!
Material damage caused by electrical voltage! The
alternative data connection cable may only be
manufactured by professional personnel.
The alternative data connection cable is a Cat-5 cable for long data
connections. The following applies to the alternative data
connection cable:
n The total length of the RS485 bus must not exceed 1,000 m
(Master/first inverter to last inverter).
n Use the pin assignment according to the table below if the
alternative data connection cable is connected to the RJ45
socket of the first inverter or to the connector of an external
data logger.
Pin assignment of the alternative RS485 data cable
Device Inverter Solar-Log
Connect
ion
3.6.5 RS485 termination
To prevent data transmission errors, the start and end of the RS485
bus should be terminated:
Contact
RJ45
Terminal
strip
WEB‘
log
RJ12
1)
Kiwigrid
Terminal
strip
Signal
¤
1 1 2 A Data A
2 4 4 B Data B
3 — — — —
4 — — — —
5 — — — —
6 — — — —
7 — — — —
8 3 6 GND Ground
NOTICE!
1
Danger of destroying the inverter's RS485 input.
Pin 1 of the RJ12 socket of the Web‘log data logger
carries 24 V DC. Never connect the alternative data
connection cable to pin 1!
28
747,431 | Z09.2 | 18/02/2016
n The external data logger (at the start of the data connection)
must be terminated according to the manufacturer's
specifications.
n The last inverter (at the end of the data connection) is
terminated by plugging the optionally available termination
plug into the free RJ45 socket (for RS485 bus) (see table in
Ä
Chapter 2.2 ‘Identification’ on page 6 under 'Optional
accessories').
3.6.6 RS485 addressing
Every inverter must be assigned its own unique address for
communication between the bus master and the slaves.
Every inverter is set with an address of 1 at the factory. This means
that the addresses must be adjusted in systems having more than 1
inverter. The following applies:
n The address is changed at the inverter via the menu items
‘Settings’ ▶ ‘Address’ .
n Only addresses ranging from 1 – 99 may be set.
n The bus master devices usually support less than 99 addresses.
Consult the respective operating instructions for these devices
before setting the addresses of the inverters.
n We recommend starting with address 1 for the first inverter on
the bus and then incrementing the address by 1 for each
subsequent inverter on the bus, in the same order as they are
physically installed. This makes it easier to identify the relevant
inverters when their address is displayed in messages shown on
the remote display.
3.6.7 Modbus RTU
The inverter communicates via Modbus RTU with energy meters. The
following applies:
n Only energy meter pre-programmed in the inverter can be used.
n The energy meter must measure the supply from the grid in
positive direction. Follow the manufacturer's instructions.
3.6.8 Modbus RTU data connection cable
EN
747,431 | Z09.2 | 18/02/2016
NOTICE!
Material damage from electrical current! The
alternative data connection cable may only be
manufactured by technical professionals.
On the inverter side, a 4-pole telephone cable with RJ10 connector
may be used as data connection cable.
29
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