Steca coolcept User manual

Installation and operating instructions
Notice d'installation et d'utilisatio
EN
coolcept coolcept-x
747.431 | Z09 | 2015-09-30

747.431 | Z09 | 2015-09-30

Table of contents
1 Preface.................................................................................................................................. 5
2 General information............................................................................................................. 6
2.1 General safety notices................................................................................................... 6
2.2 Identification................................................................................................................. 7
2.3 Scope of delivery........................................................................................................... 9
2.4 Intended use................................................................................................................. 9
2.5 About this manual....................................................................................................... 11
3 Structure and function...................................................................................................... 14
3.1 Housing....................................................................................................................... 14
3.2 Operating buttons....................................................................................................... 16
3.3 Display......................................................................................................................... 16
3.4 Cooling........................................................................................................................ 25
3.5 Grid monitoring........................................................................................................... 25
3.6 Data communication................................................................................................... 25
4 Installation.......................................................................................................................... 33
4.1 Safety measures for the installation ............................................................................ 33
4.2 Mount the inverter ..................................................................................................... 35
4.3 Prepare AC connection ............................................................................................... 36
4.4 Prepare DC connections .............................................................................................. 39
4.5 Prepare the data connection cable ............................................................................. 39
4.6 Connect inverter and switch on AC ............................................................................ 39
4.7 Initial commissioning of the inverter .......................................................................... 40
4.8 Feed-in management................................................................................................... 47
4.9 Switch DC on .............................................................................................................. 48
4.10 Dismount the inverter................................................................................................ 48
5 Operation............................................................................................................................ 50
5.1 Overview of operating functions................................................................................. 50
5.2 General operating functions ....................................................................................... 51
5.3 Important operating functions.................................................................................... 51
5.4 Internet portal............................................................................................................. 53
6 Self test............................................................................................................................... 61
7Fault rectification............................................................................................................... 63
8 Maintenance and disposal................................................................................................. 69
8.1 Maintenance............................................................................................................... 69
8.2 Disposal....................................................................................................................... 69
9 Technical data.................................................................................................................... 70
9.1 Inverter........................................................................................................................ 70
9.2 AC cable and line circuit breakers................................................................................ 82
9.3 Table of countries........................................................................................................ 82
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10 Liability, commercial guarantee, legal guarantee............................................................ 83
11 Contact............................................................................................................................... 84
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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.
See www.stecasolar.com for further information on accessories. Your installer can, of course, also
give you more information about the options and accessories that are available.
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2 General information
2.1 General safety notices
nThis document is part of the product.
nInstall and use the device only after reading and understanding this document.
nAlways perform the measures described in this document in the sequence specified.
nKeep 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.
nThe yield of the system can be reduced through improper operation
nIf the housing is damaged, do not connect the device to the DC or AC lines
nTake the device out of service immediately and disconnect it from the mains supply and the
solar modules if one of the following components is damagedM
–Device (not functioning, visible damage, smoke, penetration of liquid etc.)
– Lines
– Solar modules
Do not switch the system on again before
– the device has been repaired by a dealer or the manufacturer,
– damaged cables or solar modules have been repaired by a technical specialist.
nNever cover the device
nDo not open the casing: Risk of death. Invalidation of the guarantee.
nFactory labels and markings must never be altered, removed or rendered unreadable.
nComply 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.
Safety information on the device (coolcept Indoor)
①Dangerous voltages can remain present on the
components up to 10 minutes after switching off the DC
circuit breaker and the line circuit breaker.
②Comply with the instructions in the manual!
③Serial number as a bar code and in plain text
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Safety information on the device (coolcept Indoor)
①Caution: Surface may be hot
②Dangerous voltages can remain present on the
components up to 10 minutes after switching off the DC
circuit breaker and the line circuit breaker.
③Comply with the instructions in the manual!
④Serial number as a bar code and in plain text
2.2 Identification
Feature Description
Types coolcept (Plastic housing): StecaGrid 1500, StecaGrid 2000,
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
Version status of the
manual
Z09
Manufacturer's address See
Ä Contact, p. 84
Certificates See Appendix ⇒ Certificates and
www.stecasolar.com ⇒ coolcept – coolcept-x
Optional accessories nExternal data loggers:
–WEB‘log from Meteocontrol
–Solar-Log from Solare Datensysteme
nTermination plug for RS485 bus
–IP21: 752,856
– IP65: 740,864
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Rating plate
1
7
2
3
4
5
6
8
⑨
①Bar code for internal purposes
②Protection class
③Technical data of the DC input
④Article number and product designation
⑤Manufacturer's address
⑥Symbol Protection class II and CE mark
⑦Country of manufacture
⑧Technical data AC output
⑨Standard for grid monitoring
Notes
–For Australia only: Mask off the Protection Class IIsymbol on the type plate, as described
on
Ä p. 35 .
–For the serial number, see
Ä p. 6 and Ä p. 7
–For the position of the rating plate, see
Ä 3.1, S. 14f.
EU Declaration of Conformity
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
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2.3 Scope of delivery
nInverter ①, type coolcept (plastic housing) or coolcept-x (stainless steel housing, IP65)
nMounting plate ② for type coolcept or coolcept-x
nAC plug ③
n1 pair SUNCLIX plug-in connectors ④
n3 sealing caps (for RJ45 socket; only coolcept-x) ⑤
nBrief installation and operating instructions⑥
①②
③④⑤
⑥
2.4 Intended use
nThe inverter must only be used in grid-coupled photovoltaic systems. The inverter is suitable for
all solar modules with connections that do not need to be grounded.
nSolar modules must be used that have an IEC 61730 class A rating because the inverter does
not have electrical isolation.
nIf the maximum AC operating voltage is higher than the maximum system voltage of the
photovoltaic generator, then solar modules must be used that have a maximum system voltage
that is higher than the AC grid voltage.
Note
An overview of suitable solar modules is available at www.stecasolar.com
Þ PV GRID
CONNECTED
Þ Service and support.
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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
375 V
−350 V
DC (+)
DC (−)
U
t
0 V
UPV= 350 V
375 V
−75 V
DC (+)
DC (−)
U
t
0 V
UPV= 75 V
Fig. 1: Potential curves of UPV at 75 V (left) and 350 V (right)
StecaGrid 2500/3010 and 2500x/3010x
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 (−)
Fig. 2: Potential curves of UPV at 125 V (left) and 500 V (right)
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StecaGrid 3600/4200 and 3600x/4200x
175 V
−175 V
−275 V
275 V
320 V
U
t
0 V
−320 V
UPV = 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 (−)
Fig. 3: Potential curves of UPV at 350 V (left) and 550 V (right)
2.5 About this manual
2.5.1 Contents
This manual describes the inverters of the types coolcept and coolcept-x. The points at which the
types differ are marked in the text.
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. solar
modules, cables).
2.5.2 Target group
Unless otherwise indicated, the target audiences of this manual are technical professionals and
system operators. Technical professionals are, for example:
nPersons who have the knowledge of terminology and the skills necessary for setting up and
operating photovoltaic systems.
nPersons 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
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2.5.3 Designations
Symbols
The following table contains the symbols used in this manual and on the device.
Symbol Description Location
general danger warning manual
danger from electricity manual
device
Read the manual before using the product. device
Signal words
Keywords used in conjunction with the symbols described above:
Keyword Description
DANGER Immediate danger of death or serious bodily injury
WARNING Possible danger of death or serious bodily injury
CAUTION Possible danger of light or medium bodily injury
ATTENTION Possible damage to property
NOTE Note on operation or use of the instructions
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Abbreviations
Abbreviation Description
Derating Derating
DHCP The use of DHCP allows automatic integration of the device into an
existing network (Dynamic Host Configuration Protocol)
MSD Internal grid monitoring of the inverter (Mains monitoring with allocated
Switching Devices).
MPP Working point producing the most power (Maximum Power Point)
MPP tracker Controls the power of the connected module strings to match the MPP
SELV, TBTS, MBTS Safety Extra Low Voltage (DE : Schutzkleinspannung; FR: Très Basse
Tension de Sécurité; ES: Muy Baja Tensión de Seguridad)
VPV The generator voltage present at the DC connection (photovoltaic
voltage)
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3 Structure and function
3.1 Housing
3.1.1 coolcept
11
2
3
14
16
8 7 15
①Hood
②Display (monochrome, 128 x 64 pixels)
③Rating plate, serial number, warnings
④Operating buttons: ESC, r, s, SET (from left to
right)
⑤1x AC connection
⑥1x DC connection Minus (−) for solar modules
(Phoenix Contact SUNCLIX, safe-touch)
⑦1x DC connection Plus (+) for solar modules
(Phoenix Contact SUNCLIX, safe to touch)
⑧DC load-break switch (disconnects plus and
minus input simultaneously)
11 10 9
⑨2 x RJ45 sockets (RS485 bus)
⑩1x RJ45 socket (Ethernet)
⑪1x RJ10 socket (Modbus RTU)
The casing components are described in detail below.
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3.1.2 coolcept-x
11
2
3
14
89 67
11 151
10
1213
①Hood
②Display (monochrome, 128 x 64 pixels)
③Rating plate, serial number, warnings
④Operating buttons: ESC, r, s, SET (from left to
right)
⑤1x AC connection
⑥Pressure equalization membrane
⑦1x RJ45 socket (RS485 bus)
⑧1x DC connection Minus (−) for solar modules
(Phoenix Contact SUNCLIX, safe-touch)
⑨1x RJ45 socket (RS485 bus)
⑩1x DC connection Plus (+) for solar modules
(Phoenix Contact SUNCLIX, safe to touch)
⑪1x RJ45 socket (Ethernet)
⑫DC load-break switch (disconnects plus and minus
input simultaneously, can be safeguarded with a
padlock)
⑬Bore for optional attachment of a grounding
element or mechanical fastening element
(securing chain)
The housing components are described individually below.
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3.2 Operating buttons
The operating buttons ④ in 3.1.1 Ä further information on page 14 and in 3.1.2
Ä further information on page 15 have the following functions:
Button Action
Function
General guided operation
ESC Press briefly To go to the next higher menu
level
Goes 1 step back
Discards a change
Press long
(≥ 1 second)
Goes to the status display Goes to the beginning of guided
operation
rPress briefly nMoves the marking bar or the display content upward
nIn a numeric setting, moves the marking 1 position to the left
nIncreases an adjustment value by 1 increment
sPress briefly nMoves the marking bar or the display content downward
nIn a numeric setting, moves the marking 1 position to the left
nIncreases an adjustment value by 1 increment
SET Press briefly To go to the next lower menu
level
—
nA marked numeric value starts flashing and can be changed
nApplies a change
nChanges the status of a control element (check box/option box)
Press long
(≥ 1 second)
Responds to a dialogue with Yes Goes 1 step back
3.3 Display
3.3.1 General information
For the presentation on the display (② in 3.1.1
Ä further information on page 14 and 3.1.2
Ä further information on page 15)
nMounting : If the inverter is processing large volumes of data, at this time it cannot process
any user inputs. The wait time that occurs is indicated by the animated sun symbol.
nFaults are indicated by a red flashing background illumination. An incident message is
concurrently shown.
Note
The display reacts more slowly at extremely low temperatures. In particular, this can apply for
coolcept-xdevices if they are used outdoors.
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3.3.2 Information
The information shown on the display is described below using illustrative examples.
Status display
The status display shows the following values:
34
2
2
7 8
9
5 6
1
F
①Measurement name
②Measurement with units
③Date is displayed alternatingly with IP address
④Symbol Non-confirmed event messages; more information
on this is provided in Section Ä , p. 63
.Animated Connect symbol with 2‑digit inverter address;
indicates data traffic on the RS485 bus.
⑥Symbol Derating (Derating)
①Symbol Fixed voltage mode activated
⑦Time
⑧Time
⑨IP address of the device when a network connection has
been established, display alternates with ③ – ⑦
The following applies to the status display:
nThe measurements shown in the status display are defined
under Settings ▶ Meas. values. Some measurements are
always displayed (default setting).
nCurrent values are not displayed at night (solar irradiation too
low; example in Fig. left).
nThe CO2 saving shown in the status display are calculated
using the savings factor 508 g/kWh .
Numeric yield (day, month, year)
Daily, monthly and annual yields can be displayed numerically in a list.
①Yield period (day/month/year)
②Individual yields with period and value (1 per row)
The yield periods contain the following numbers of individual
entries:
Day yield: Last 31 days1)
Monthly yield: Last 13 months1)
Annual yield: Last 30 years1)
1) A yield value of 0 is shown when the inverter was not yet
installed at that time.
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Graphical yield (day, month, year)
Daily, monthly and annual yields can be displayed graphically in a chart.
①Period for a single yield value (here: day yield)
②y-axis:
nYield in kWh
nWith an extra M: yield in MWh
nThe scaling changes depending on the maximum value.
③x-axis: time in hours/days/months/years
④Total of all individual yields shown in the diagram, in kWh
The graphical representation can show annual yields for the last 20
years.
Incident messages
See 7.
Ä , p. 63
Generator characteristic curve
①x-axis: input voltage in V
②y-axis: power in kW
③Peak = MPP
When the ‘Gen. Ch. Curve’ menu item is called, the inverter records
the generator characteristic curve of the inverter and then displays
it (Fig. upper left). The following applies:
nThe inverter traverses the input voltage range and records the
power generated over this range. Duration: a few seconds,
is displayed.
nThe MPP is the peak of the generator characteristic curve.
nThis peak and the generator characteristic curve change with
the level of solar irradiation.
nMultiple peaks are a sign of partial shadowing (Fig. left).
nIf the top of the curve is flat then the inverter can possibly no
longer feed power into the grid.
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Information
The menu item Information contains the following sub-menu
items.
nContact data
nSystem information (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
nCountry setting: country that is currently set and country-
specific grid parameters; see also
Ä 9.3, p. 82.
nReactive power characteristic curve: Diagram of the
reactive power characteristic curve (only if prescribed for the
set country)
nNetwork: Network parameters, in some cases adjustable 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
nResults of the last self-test (only if Italy is set in the country
setting)
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3.3.3 Settings
Numerical settings
①Designation of the numerical setting
②Value to be set; the selected value to be set is highlighted in
black.
When performing numerical settings of remuneration and dates,
the following applies:
Remuneration
nPossible currencies: £ (Pounds), € (Euros), kr (Krones), none.
nThe 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 a currency of none).
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
Selection of the measurements to be shown in the status display.
The following measurements can be selected:
nOutput power: Inverter output power1)
nActual day yield: Day yield since 0:00
nPV voltage: the voltage supplied by the solar modules
nPV current: the current supplied by the solar modules
nGrid voltage: Voltage at the inverter connection1)
nGrid current: the current fed into the mains grid
nGrid frequency
nInternal temperature: Internal temperature of the inverter
nDerating reason for derating2)
nMax. daily power: the maximum power supplied in the
current day3)
nAbs. max. power: the maximum power ever fed into the
grid3)
nMax. daily yield: the maximum daily yield achieved3)
nOperating hours: The operating hours during which the
device has been connected to the grid (including night-time
hours).
nTotal yield: Yield since commissioning
nCO2 saving: CO2savings achieved since commissioning
1) Measurement is always displayed (cannot be switched off)
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