SMA SC 400HE Installation
EN
Central Inverter
SUNNY CENTRAL 400HE / 500HE / 630HE
Installation Guide
SCxxxHE-IEN104432 | 98-4007732 | Version 3.2
SMA Solar Technology AG Table of Contents
Table of Contents
1 Notes on this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Target Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Appropriate Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.1 Personnel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.2 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.3 Special Hazards of Photovoltaic Plants. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.4 Electrical Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.5 Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.6 Disconnecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2.7 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3 Delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.1 Standard Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2 Scope of Delivery (depending on the model). . . . . . . . . . . . . . 18
3.3 Identifying your Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4 Check for Transport Damage . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.5 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1 Installation Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2 Electrical Operating Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2.1 MV Stations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.3 Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.3.1 Exhaust Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
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Table of Contents SMA Solar Technology AG
4.4 Transport Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.4.1 Transport Using a Pallet Truck or Forklift . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.4.2 Transport Using a Crane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.5 On-Site Inverter Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.5.1 Mechanical Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.5.2 Mechanical Coupling for the "Chemically Active" Option . . . . . . . . . . . . . . 35
4.5.3 Anchorage to the Ground or Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5 Internal Electrical Connections . . . . . . . . . . . . . . . . . . . . . 37
5.1 Connecting the Power Cable Connection. . . . . . . . . . . . . . . . . 37
5.1.1 Connecting the Power Cable for the "Chemically Active" Option. . . . . . . . . 41
5.2 Connecting the Internal PE Connection. . . . . . . . . . . . . . . . . . . 42
5.3 Connecting the Control Cables on the Transfer Terminal Strip . 44
5.3.1 Connecting the Control Cables to the Transfer Terminal Strip in the
AC Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.4 Connecting the Sunny Central Control to the Power Unit. . . . . 46
5.5 Connecting the Internal Control Cables of the Power Unit . . . . 47
5.6 Connecting the Communication Unit for Insulation
Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6 External Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1 Connecting High-Current Contacts . . . . . . . . . . . . . . . . . . . . . . 50
6.2 Connecting the AC Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.2.1 Mounting and Dismounting the Plexiglas Cover and Sliding Plate . . . . . . . . 55
6.2.2 Procedure for Models 13/0 and 13/4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
6.2.3 Procedure for Model 13/1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
6.2.4 Procedure for Model 13/2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
6.2.5 Procedure for Model 13/3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
6.2.6 Procedure for Model 13/5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
6.2.7 Connecting the AC Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.3 AC Grid Connection for MV Stations . . . . . . . . . . . . . . . . . . . . 69
6.4 Connecting the PE Rail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
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6.5 Connecting the Internal Power Supply . . . . . . . . . . . . . . . . . . . 72
6.5.1 Connecting the External Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.5.2 Connecting the Internal Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
6.6 Connecting the DC Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
6.6.1 Connecting the DC Cable to the Busbar. . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.6.2 Connecting the DC Cable to the Low-Voltage HRC Fuses . . . . . . . . . . . . . . 78
6.6.3 Additional Connections of DC Main Distributors . . . . . . . . . . . . . . . . . . . . . 81
6.7 Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
6.7.1 Analog Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
6.7.2 External Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
6.7.3 Overview of the Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
6.7.4 Handling the Shield Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
6.8 Remote Deactivation Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
6.9 Serial Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
6.10 Emergency Stop Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
6.11 Overvoltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
7.1 Removing the Transport Locks. . . . . . . . . . . . . . . . . . . . . . . . . . 90
7.2 Checking the Sunny Central Cabling . . . . . . . . . . . . . . . . . . . . 91
7.2.1 Checking Internal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
7.2.2 Checking the AC Grid Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
7.2.3 Checking the Internal AC Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
7.2.4 Checking the DC Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
7.2.5 Checking the Connection of the Serial Interfaces . . . . . . . . . . . . . . . . . . . . . 92
7.2.6 Checking the Emergency Stop Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
7.2.7 Checking the Thermostat and Hygrostat Settings . . . . . . . . . . . . . . . . . . . . . 93
7.3 Checking the Voltages on the Sunny Central . . . . . . . . . . . . . . 93
7.4 Preparation for Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . 95
7.5 Switching On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
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Table of Contents SMA Solar Technology AG
8 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
8.1 Sunny Central 400HE-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
8.2 Sunny Central 500HE-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
8.3 Sunny Central 630HE-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
9 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
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SMA Solar Technology AG Notes on this Manual
1 Notes on this Manual
1.1 Validity
This manual describes the transport, installation, and commissioning of SMA central inverters of the
following types:
• Sunny Central 400HE (SC 400HE-11)
• Sunny Central 500HE (SC 500HE-11)
• Sunny Central 630HE (SC 630HE-11)
1.2 Target Group
This manual is intended for installers and operators of PV plants equipped with Sunny Centrals.
1.3 Additional Information
All manuals for the Sunny Central as well as for the installed components must be stored together with
the plant documentation and must be accessible at all times. The documents listed below are included
in the scope of delivery for your Sunny Central. The following information is contained in these
documents.
• Installation guide: Setup and installation of the Sunny Central
• User manual: How to operate the Sunny Central and Sunny Central Control
• Circuit diagrams: Variant circuit diagram of the Sunny Central
• Maintenance manual Regular maintenance work on the Sunny Central
• Maintenance protocol List of the regular maintenance work and its intervals as well as the
preventive replacement intervals of individual components.
• Commissioning report Check list for commissioning. After successful commissioning, the
commissioning report has to be sent to SMA Solar Technology AG.
• Accessory documentation: The documentation for optional accessories or optional equipment
for the Sunny Central can be found at www.SMA.de/en.
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Notes on this Manual SMA Solar Technology AG
1.4 Symbols Used
The following types of safety instructions and general information appear in this document as
described below:
DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING!
WARNING indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION!
CAUTION indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury.
NOTICE!
NOTICE indicates a situation that can result in property damage if not avoided.
Information
Information provides tips that are valuable for the optimal installation and operation of
your product.
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SMA Solar Technology AG Safety
2 Safety
2.1 Appropriate Usage
The Sunny Central is a PV inverter. It allows photovoltaic solar energy from solar modules to be
converted and fed into a medium-voltage grid.
Principle of a grid-tie PV plant with a Sunny Central
APV modules
B Sunny String-Monitor
C Sunny Main Box
D Sunny Central
E Medium-voltage transformer
F Electrical grid
Sunny Central HE
The Sunny Central HE is a high efficiency solar inverter. It does not have its own low-voltage
transformer. The Sunny Central HE requires an adapted external medium-voltage transformer via
which it can feed into the grid.
The following standards apply for all devices of this series:
EMC EN 61000-6-2, EN 61000-6-4
Grid monitoring As per BDEW regulations
CE conformity yes
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Safety SMA Solar Technology AG
2.2 Safety Precautions
Failures that affect or limit the safety of the device must be rectified immediately. Unauthorized
mo dif ica tio ns a nd t he u se o f sp are par ts n ot r eco mme nde d by SMA Solar Technology may cause fire,
material damage, and electrical shock. Unauthorized personnel must not have access to the devices.
Warning signs must always be clearly readable and immediately replaced if damaged.
2.2.1 Personnel
Any work on the Sunny Central may be executed by qualified technical personnel only. "Qualified"
means that the personnel must possess training relevant to the activity performed.
The personnel must be familiar with the content of the Sunny Central installation guide and user
manual in order to commission and / or operate the Sunny Central. Please observe all safety
information carefully.
2.2.2 Installation
The installation requirements described in the installation guide must be satisfied. Installation must
occur in an electrical operating room, in order to guarantee optimum noise and fire protection.
Wi th r ega rd t o the EMC lim it va lue s (E MC = ele ctr omag net ic c omp atibility), the Sunny Central device
range is type tested for installation in an industrial environment. Devices suitable for installation in
domestic areas are available on request.
The following points must be observed for the installation:
• The intake and exhaust ventilation systems for the Sunny Central must be separate to any other
ventilation systems so as to prevent smoke distribution in the event of a fire.
• A sufficient escape route must be guaranteed.
• Appropriate sound insulation must be provided.
• The EMC specifications must be observed (see technical data).
WARNING!
Smoke development in electrical operating rooms.
We recommend the installation of a smoke detector inside the operating room which
controls the external emergency stop switch of the device and switches off the Sunny
Central in the event of smoke.
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2.2.3 Special Hazards of Photovoltaic Plants
Photovoltaic plants have special characteristics representing special hazards that are described here:
• An active power source is connected. Depending on the operating mode, there may be voltage
present from the photovoltaic generator and/or the Sunny Central. This is especially important
to note when disconnecting particular parts of the plant.
• V ery hig h DC vol tag es ar e pr ese nt ( no z ero -cro ssi ng) tha t, i n the case of a fault or inappropriate
use of fuses or plugs, may lead to arcing.
• The short circuit current of the photovoltaic generator is only slightly higher than the maximum
operating current and also depends on the irradiation. If a short-circuit occurs in the plant, the
available fuses are not guaranteed to switch off.
• The grid structure of the PV generator is generally a non-grounded grid that could become
unintentionally grounded if a ground fault occurs.
• A highly branched generator array may be difficult to disconnect if a fault develops (e.g. short
circuit). We recommend the extra use of external DC circuit breakers for disconnecting the
inverter and / or the DC main cables / Sunny String-Monitors, DC circuit breakers optionally
available. At every DC input, an easily accessible DC circuit breaker should be installed. For
further information see pre-standard VDE 0100, part 712 and VDI guideline 6012.
2.2.4 Electrical Connection
The electrical connection must be performed according to this installation guide, the variant circuit
diagram and the technical data of the device.
Ensure the grid connection cable for grid feeding-in is fused at the nominal current indicated on the
type plate. If the specified nominal current differs from the nominal current of the fuse plug, the fuse
plug having the next highest nominal current may be used.
Grid connection cable
The grid connection cable for the in ter nal pow er s upp ly m ust be secured with the line circuit
breaker specified in the technical data.
Lightning Protection
The devices have type I internal lightning protection on the AC side and type II internal overvoltage
protection on the DC side and the internal power supply. However, the desired protection level can
only be achieved if a lightning protection area concept exists for the installation building as per
DIN VDE 0185-4, i.e. lightning conductors or combined overvoltage and lightning conductors
(n ot i ncl ude d in deli ver y) a re a vailabl e at loc ati ons includi ng t he b uil ding’s e ntr anc e (t ransfer l igh tning
protection area LPZ 1).
Combined overvoltage and lightning protection for the signal inputs can be optionally ordered.
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Safety SMA Solar Technology AG
Emergency Stop
In plants having more than one device, the respective emergency stop switches must be connected
to get her and checked f or c orr ect operati on a s de scr ibe d in thi s in sta lla tio n gu ide. The eme rge ncy sto p
circuit may only be supplied with voltage from a single device.
Emergency stop circuit
• The emergency stop circuit may only be supplied by a Sunny Central.
• Correctly mount the bridges on the device's emergency stop terminal strip.
2.2.5 Power Supplies
WARNING!
Risk of lethal electric shock.
High voltages are present in the device.
• The grounding conductor must be made before the external voltage is switched on.
• At the AC grid connection terminal, the nominal voltage, frequency and the
right‑hand rotary field have to be maintained.
• The correct polarity and ungroundedness must be ensured before inserting the DC
input fuses (internal or external). The fuses may only be inserted and / or removed
under load-free conditions and using the appropriate personal protective equipment
and fuse carriers.
• When the DC fuses (internal or external) have been inserted, reverse voltage exists,
via the Sunny Central busbars, on all externally connected DC main distribution
boxes and DC sub-distribution boxes (Sunny String Box).
• The doors must remain closed when connecting the supplies!
Requirements for the Use of External Power Supplies
• All connections have been made according to the installation guide and the circuit diagram.
• The grounding conductor for grid feed-in and for internal power supply has been made.
• The device is switched off. The key switch is in the “Stop” position and the main switches are off.
• The DC input fuses (internal or external) are connected and the protection against contact
(Plexiglas covers) is mounted.
• The nominal voltages, frequencies and the right-hand rotary field are maintained.
• The polarity of the DC voltage at the inputs / fuse inputs (device dependent) has been checked.
• The polarity of the DC voltages at the inverter input (device dependent) has been checked.
• The photovoltaic generator has been checked with an insulation test to ensure that there is no
ground fault.
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Sequence for Switching On the External Power Supplies
1. Grid voltage for grid feeding
2. Grid voltage for internal power supply
3. DC voltage from the photovoltaic generator
2.2.6 Disconnecting
External isolation of the device must always occur under load-free conditions. The device must be
switched off in order to do this, i.e. the key switch must be in the “Stop” position.
DANGER!
Risk of lethal electric shock.
Work on the Sunny Central may be performed only after switching off the power to the
unit. The VDE regulations must be followed:
•Disconnect
• Ensure that the device cannot be reconnected
• Ensure that no voltage is present
• Ground and short-circuit the unit if necessary (not on the DC side)
• If necessary, cover or shield any adjacent live components
The following power supplies must be isolated:
• Grid voltage for grid feeding
• Grid voltage for internal power supply (optional)
• DC voltage from the photovoltaic generator
• Additional external voltage if necessary (e.g. emergency stop)
Simply switching off the main AC and DC switches is not sufficient to ensure proper isolation of the
device. The main switches only separate the power circuit from the grid and the photovoltaic
generator.
DANGER!
Risk of lethal electric shock.
Dangerous accidental-contact voltages can be present in the Sunny Central even when the
main AC and DC switches are switched off!
• Wait at least 5 minutes after switching off the Sunny Central.
The DC voltage is isolated using the internal or external DC input fuses, or using an external circuit
breaker if present. Isolation by removing the DC input fuses must occur under load-free conditions.
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Safety SMA Solar Technology AG
Th e de vic e con tai ns c apa cit ors on th e AC and DC si des tha t mus t di scha rge onc e the dev ice has bee n
switched off. After switching off, dangerous accidental-contact voltages remain within the device for
several minutes. If there is a fault in the device, these voltages may also be present for a longer period
of time. Wait at least 5 minutes after switching off the device before opening the device.
WARNING!
Risk of lethal electric shock!
• To avoid arcing, the load-free status of the device must be checked with a current
probe (using a clamp-on ammeter) before removing the DC input fuses. The fuses
may only be inserted or removed using the appropriate personal protective
equipment and fuse carrier.
• When the DC fuses (internal or external) have been inserted, reverse voltage exists,
via the Sunny Central busbars, on all externally connected DC main distribution
boxes and DC sub-distribution boxes (Sunny String-Monitor).
• In the event of a failure, the DC contactor may carry a life-threatening DC voltage!
• The discharge time of the capacitors is longer than 5 minutes.
To extract the fuses, the Plexiglass cover must be removed. Immediately reinstall the cover after the
cover has been removed from one pole and the fuse has been extracted. The cover must always be
mounted unless a fuse is to be extracted.
Disconnecting plant parts without danger
We recommend the extra use of external DC circuit breakers for disconnecting the
Sunny Central, DC main cables and Sunny String-Monitor; DC circuit breakers are
optionally available. This allows system components to be safely isolated, even in the case
of faults or fire.
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2.2.7 General Information
Ear Protection
The device fans and the power module create significant levels of operating noise. In addition to this,
a fault in the device can lead to very high sound levels.
High noise levels in electrical operating rooms
We recommend the use of ear protection when in the vicinity of the Sunny Central
operating room for extended periods.
Burns
Immediately after isolating the device, depending on the operating conditions, certain components
can be very hot (e.g. fuses, transformer core, sinusoidal filter, heat sinks etc.).
Safety gloves should always be worn when working near components that can be expected to be
very hot.
High temperature on device parts
We recommend that safety gloves be worn during all work on the device.
Installation Guide SCxxxHE-IEN104432 15
Delivery SMA Solar Technology AG
3 Delivery
3.1 Standard Scope of Delivery
Position Quantity Designation
A 1 DC / inverter cabinet
B 1 AC cabinet
C1Power cabling
D 1 SMA document set
• Installation guide
• User manual
• Variant circuit diagram
• Commissioning report
E 1 Documentation of the optional insulation monitoring (Bender)
F 1 Low-voltage HRC fuse carrier, optional
G 2 Terminal profile, 3 m Rittal SZ 2573.000
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SMA Solar Technology AG Delivery
Position Quantity Designation
H 1 Rittal assembly set
• Delivery pouch, 2-door TS8 1200 x 2000
• Angle bracket TS corner TS8800.430
• Quick angle connector TS TS8800.500
• Rittal angle plate PS 4582.500
• Sealing tape
I1 4 Shield clamping saddle 7 - 16mm Wago 790-116
I2 5 Shield clamping saddle 0 - 8mm Wago 790-108
K1 6 OBO cable clip 34 – 40 mm
K2 17 OBO cable clip 28 – 34 mm
K3 21 OBO cable clip 22 – 28 mm
K4 14 OBO cable clip 12 – 16 mm
L1 6 OBO opposite sleeve 1197169 2058 FW/40
L2 17 OBO opposite sleeve 1197282 2058 FW/34
L3 21 OBO opposite sleeve 1197347 2058 FW/28
L4 14 OBO opposite sleeve 1197401 2058 FW/16
Installation Guide SCxxxHE-IEN104432 17
Delivery SMA Solar Technology AG
3.2 Scope of Delivery (depending on the model)
Position Quantity Designation
A 1 AC connection model 13/0:
• 3 x straight copper bar (same length)
• 3 x insulator
• 1 x retaining bracket
• 3 x insulator and setscrew
B 1 AC connection model 13/1:
• 3 x L-shaped copper bar
• 3 x insulator
• 1 x retaining bracket
• 3 x insulator and setscrew
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Position Quantity Designation
C 1 AC connection model 13/2:
• 3 x U-formed copper bar
• 3 x insulator
• 3 x insulator and setscrew
D 1 AC connection model 13/3:
• 3 x U-formed copper bar
• 3 x support
• 1 x retaining bracket
• 3 x insulator and setscrew
• 18 x cable clip and opposite sleeve
• 3 x cable rail for side panels
• 6 x sliding nut
E 1 AC connection model 13/4:
• 3 x copper bar, varying angles
• 3 x insulator
• 1 x retaining bracket
• 3 x insulator and setscrew
F 1 AC connection model 13/5
• 3 x copper bar 2 x angled + separated
• 3 x insulator
• 1 x retaining bracket
• 3 x insulator and setscrew
• 6 x screw connector for the separated bars
Retaining brackets on the device
The retaining brackets are pre-installed on the device.
Installation Guide SCxxxHE-IEN104432 19
Delivery SMA Solar Technology AG
A
SUNNY CENTRAL 630HE
AA
SMA
3.3 Identifying your Sunny Central
You can identify the Sunny Central using the type label. The type label is located on the inside of the
Sunny Central’s door.
In addition, the series number (A) is located on the front
side of the device.
Selecting switch cabinet units
Sunny Centrals are supplied as two switch cabinet units. If several Sunny Centrals are
delivered and installed together, switch cabinet units with the same serial number have to
be installed side by side.
3.4 Check for Transport Damage
Check the packaging and the device for any possible damage and compare the scope of delivery
with the delivery documentation. In the case of damage to the device and/or unclear delivery
contents, immediately contact SMA Solar Technology.
Transport safety
The inverters are delivered as two separate switch cabinet units. They do not satisfy the
protection class requirements as specified in the technical data. The transport packaging
provides sufficient protection against moisture and damage.
20 SCxxxHE-IEN104432 Installation Guide
SMA Solar Technology AG Delivery
3.5 Storage
The switch cabinet units do not satisfy the protection class requirements as specified in the technical
data. The transport packaging provides sufficient protection against moisture and damage after
shipping. The switch cabinet units may not be stored outdoors.
Notice!
Improper storage may cause damage to the Sunny Central.
Improper storage can cause moisture or dust to seep into the Sunny Central.
• Only store the Sunny Central in areas where it is protected from dust and moisture.
• The conditions under which the Sunny Central is stored must correspond to the
intended operating conditions.
• Do not store the Sunny Central outdoors.
Installation Guide SCxxxHE-IEN104432 21
Installation SMA Solar Technology AG
4 Installation
Sunny central installation requirements
Each Sunny Central has individual installation requirements. These can be ordered at any
time from SMA Solar Technology and have to be observed for project planning and
preparation of the installation site.
Selecting switch cabinet units
During installation and internal cabling, make sure the switch cabinet units have the same
series number.
4.1 Installation Site Requirements
Sunny central installation location
The Sunny Central should be installed in an electrical operating room.
Floor
The foundation must guarantee solid and safe positioning of the inverter. The foundation must provide
the load-carrying capacity necessary to cope with the weight of the inverter. The inverter cabinet must
be installed on a level surface. Any existing unevenness, depression or slope must be corrected prior
to installation.
Wall Clearances
When installing the inverter, appropriate distance to the wall for minimum passageways, escape
routes, and ventilation have to be observed. Appropriate specifications for each type of inverter are
contained in the Sunny Central Installation Requirements (separate document).
Inverter Protection Rating / EMC / Sound Levels
The Sunny Central is suitable for a dry, dust-reduced environment, according to IP20 protection rating.
With regard to the EMC emissions and the noise level, the Sunny Central inverter is conceived for
setup in an industrial environment.
4.2 Electrical Operating Room
For the installation and connection of the Sunny Central central inverters, observe DIN VDE 0100,
part 729, part 731. The requirements for the electrical operating room for the installation of highvoltage systems up to 1 000 V as well as the requirements for passageways and escape routes are
included therein.
22 SCxxxHE-IEN104432 Installation Guide
SMA Solar Technology AG Installation
A
B
C C
B
A
SUNNY CENTRAL 630HESUNNY CENTRAL 630HE
SMA
SMA
Minimum passageway in electrical operating rooms
Observe the following points for a minimum passageway:
• With fully opened switch cabinet doors, a minimum passage width of 500 mm
(escape routes) must be maintained, see DIN VDE 0100 part 729, part 731.
• To maintain the minimum passageway requirements, the cabinet doors in an inverter
system with two rows of opposing cabinets (e.g. in a station building) may only be
opened on one side at a time.
4.2.1 MV Stations
Inverters in the HE se ries ar e normally s et up in a compa ct concrete substation, opposite to each other
as a “left-hand system” and a “right-hand system”. The installation h as t o be car rie d ou t in accorda nce
with the VDE guidelines for a closed electrical operating room. The figure below depicts a left-hand
and a right-hand system.
Left system Right system
ADC cabinet
BInverter cabinet
CAC cabinet
The AC cabinets should always stand next to the dividing wall to the transformer room, to allow the
AC power cables to be connected to the transformer over the shortest possible route.
WARNING!
Smoke development in electrical operating rooms.
We recommend the installation of a smoke detector inside the operating room which
controls the external emergency stop connection of the device and which switches off the
Sunny Central in the event of smoke.
Installation Guide SCxxxHE-IEN104432 23
Installation SMA Solar Technology AG
A B C
D
Sunny Centrals in a Station
A selection of schematic top views of a Sunny Central installed in a station and a transformer room
are included below. The inverter has bee n installed as a “ right -hand system” (above) and a “left-hand
system” (below). A station may also include only one Sunny Central. In addition to a transformer, the
option exists to also include a medium-voltage switchgear in a transformer room.
MV Station with two Sunny Centrals without Medium-Voltage Switchgear
A AC cabinet
B Inverter cabinet
C DC cabinet
DTransformer
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SMA Solar Technology AG Installation
A B C
D
E
MV Station with two Sunny Centrals and Medium-Voltage Switchgear
A AC cabinet
B Inverter cabinet
C DC cabinet
DTransformer
E Medium-voltage switchgear
Installation Guide SCxxxHE-IEN104432 25
Installation SMA Solar Technology AG
A B C
D
A B C
D
E
MV Station with one Sunny Central without Medium-Voltage Switchgear
A AC cabinet
B Inverter cabinet
C DC cabinet
DTransformer
MV Station with one Sunny Central and Medium-Voltage Switchgear
A AC cabinet
B Inverter cabinet
C DC cabinet
DTransformer
E Medium-voltage switchgear
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SMA Solar Technology AG Installation
4.3 Ventilation
Appropriate inlet ventilation is required for cooling the inverter. In order to guarantee safe operation
and maximum feed-in power, the permissible ambient temperature must be observed.
The required air is drawn through the switch cabinet doors and is blown out via the roof or the rear
pa nel of t he c abi net uni t de pen din g on the Sun ny C ent ral model Thi s al low s th e de vic es t o be ins tal led
directly next to each other. See the Sunny Central Installation Requirements (separate document) for
the air requirements as well as appropriate wall clearances. Filters for cleaning the inlet air are
installed at the inlet vents.
If the required volume of air at the installation site of the Sunny Central is too small, then on-site
measures must be taken to provide greater quantities of air (ventilation grills, blowers, fans, etc.).
The inlet air must satisfy the requirements of classification 3S2 (see table). Classification 3C2 must be
met if installation is to occur in chemically aggressive environments, e.g. installation near the sea. The
operation of the inverter is suited to a relative humidity of 15 … 95 %.
Air Quality Classification for Mechanically Active Substances
Environmental conditions for stationary
application
3S1 3S2 3S3 3S4
Class
a) Sand in the air [mg / m³] - 30 300 3 000
b) Dust (suspended matter) [mg / m³] 0.01 0.2 0.4 4.0
c) Dust (fallout) [mg / m³] 0.4 1.5 15 40
Sites where appropriate measures are taken to
xxxx
keep dust levels to a minimum.
Sites where no special measures have been taken
xxx
to reduce the sand or dust levels and which are
not located in the vicinity of sand or dust sources.
Sites near sand and dust sources x x
Sites in production halls where sand or dust is
x
present, or sites in geographical locations where
the air is prone to high levels of sand and dust.
Installation Guide SCxxxHE-IEN104432 27
Installation SMA Solar Technology AG
Air Quality Classification for Chemically Active Substances
Environmental conditions for stationary
application
Class
3C1R 3C1L 3C1 3C2 3C3 3C4
a) Marine salt - - - Occurrence of marine
salt
b) Sulfur dioxide, mg / m³ 0.01 0.1 0.1 1.0 10 40
c) Hydrogen sulfide, mg / m³ 0.0015 0.01 0.01 0.5 10 70
c) Chlorine, mg / m³ 0.001 0.01 0.1 0.3 1.0 3.0
d) Hydrogen chloride, mg / m³ 0.001 0.01 0.1 0.5 5.0 5.0
e) Hydrogen fluoride, mg / m³ 0.001 0.003 0.003 0.03 2.0 2.0
f) Ammonia, mg / m³ 0.03 0.3 0.3 3.0 35 175
g) Ozone, mg / m³ 0.004 0.01 0.01 0.1 0.3 2.0
h) Nitrogen oxides, mg / m³ 0.01 0.1 0.1 1.0 9.0 20
Installation sites with carefully monitored and
x xxxxx
regulated atmospheres (category clean
spaces).
Installation sites with carefully regulated
xxxxx
atmospheres.
Installation sites in rural or densely populated
xxxx
areas with little industry and moderate traffic
volume.
Installation sites in densely populated areas
xxx
with industry and high traffic volume.
Installation sites directly neighboring industrial
xx
plants, with chemical emissions.
Installation sites directly inside of industrial
x
plants, with emission of high concentrations of
chemical pollutants.
Environmental Conditions
The following points must be observed in relation to environmental conditions:
• Required amount of fresh air
• Stipulated air quality
• Relative humidity
• Permissible ambient temperature
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4.3.1 Exhaust Airflow
The heated exhaust air generated by the inverter must be ducted away from the device so that the
maximum permissible environmental temperature is not exceeded and / or the war m ex hau st ai r do es
not unnecessarily heat the installation room.
CAUTION!
Risk of crushing from metal parts.
• Remove the finger protection from the fan openings of the Sunny Central before
installing the exhaust airflow.
The exhaust airflow of the DC and AC cabinets occurs upward. This is achieved through the on-site
installation of an exhaust airflow (e.g. air conduit).
The exhaust airflow of the inverter cabinet occurs on the rear-side. The Sunny Central can be set up
with the rear panel directly against the opening in the building wall. An on-site sealing or a frame-like
air box with seals is to be installed for this purpose. The air box must be fastened onto the building
wall.
NOTICE!
Operational reduction of the Sunny Central through overtemperature!
For an appropriate cooling of the inverter, the following points have to be observed:
• Observe the indicated amount of air.
• Clean the ventilation openings (filter pads) and the exhaust grills at regular intervals.
• Expel the exhaust air separately out of the individual cabinet components in order to
avoid thermal short circuit breaks.
Information regarding the inverter
The specific configuration of the ventilation systems for each inverter is to be taken from the
Sunny Central Installation Requirements (separate document).
Installation Guide SCxxxHE-IEN104432 29
Installation SMA Solar Technology AG
Overview of the Air Inlets and Outlets
Examples are used below to illustrate the exact position and size of the single air grills as well as for
the supply air on the front side (B) and the exhaust air on the roof or at the rear side (A) of the switch
cabinets.
AExhaust air BSupply air
Exact dimensions
For exact dimensions, please refer to the Installation Requirements of the relevant device.
The Installation Requirements are available at www.SMA.de/en.
30 SCxxxHE-IEN104432 Installation Guide
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