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Technical Information
SC500HE-US-Auf-UUS093912 Version 1.2 1/13
Installation requirementsfor SUNNY CENTRAL 500HE-US
1 ContentsThis document describes the requirements which have to be observed for the installation site of the Sunny Central 500HE-US. The installation and the electrical connection of the Sunny Central are described in the installation guide.
Technical Information The Sunny Central‘s Design
SMA Solar Technology AG 2/13
2 The Sunny Central‘s DesignThe Sunny Central is divided into two sections.
Position Cabinet DescriptionA Power Cabinet The power cabinet contains the power unit for converting
direct current to alternating current.B Control and Interface Cabinet All AC, DC and communication cables are connected in the
control and interface cabinet. The control and interface cabinet contains:
• system control• Sunny Display • stop/start switch• optional communication devices
A B
Technical Information Transport and Installation
SMA Solar Technology AG 3/13
3 Transport and InstallationThis section shows how to find the best installation site for your Sunny Central.
3.1 Choosing the Installation Site
Dimensions and weightThe Sunny Central has a total weight of 3,970 lbs.
Ambient Conditions• The installation location must be accessible at all times.• The ambient temperature must be between -13 °F and
+122 °F (–25 °C and 50 °C).• For installing the Sunny Central in closed rooms an air
supply of 1766 CFM is needed.• Direct solar irradiation reduces the output power of the Sunny Central.
Characteristics of the Base• The foundation must be made of concrete.• The mounting surface must be level and strong enough to
support the weight of the inverter. The evenness of the foundation must be less than 0,25 %.
• The width and depth of the base must be at least the same size as the Sunny Central.
89
.7 in.
35.4 in.98.4 in.
min. 110 in.min. 45 in.
Technical Information Transport and Installation
SMA Solar Technology AG 4/13
• To insert the cables from below, the cable conduits must be laid in the foundation.
Minimum Clearance 1 Sunny Central with TransformerObserve the specified minimum clearances for the cables, for ventilation and for opening the doors.
Position Cables inserted from ... Minimum clearanceA below 6 in.B the side 47 in.
12 in.6 in.
47 in.47 in.(B)
6 in.(A)
16 in.
Technical Information Transport and Installation
SMA Solar Technology AG 5/13
Minimum Clearance 2 Sunny Centrals with TransformerObserve the specified minimum clearances for the cables, for ventilation and for opening the doors.
Position DescriptionA Sunny Central 1B Sunny Central 2C Medium-voltage transformer + Medium-voltage switchgearD Cable route between Sunny Central and transformer. The cables between the Sunny Central
and the transformer may not be longer then 49.2 ft.
12 in.
6 in.
71 in.
12 in.
47 in.
A
B
D
D
47 in.
Technical Information Transport and Installation
SMA Solar Technology AG 6/13
3.2 Preparation of the BaseThe inverter must be secured to the foundation per local building codes. At the bottom of the Sunny Central there are 6 mounting holes for anchoring it to its base.
Position of the Mounting Holes
Size of the Mounting Holes
45.1 in. 47.3 in.
43.1 in.
29
.7 in
.
31
.7 in
.
0.6 in.
Technical Information Attaching the Conduits
SMA Solar Technology AG 7/13
4 Attaching the ConduitsThe DC cables, the AC cables and the communication cables can be routed into the Sunny Central‘s interface cabinet from the right or from below. The two options are described below.
Insert Cables From the Right Into the Sunny CentralInsert the DC cables, the AC cables and the data cables into the Sunny Central from the right. A metal sheet is attached to the Sunny Central for this purpose.
Right figure: Example of how the holes for the conduits are arranged.
Insert cables from below into the Sunny CentralInsert the DC cables, the AC cables and the communication cables into the Sunny Central from the bottom through the foundation.
Position DescriptionA Conduit for AC cables.B Conduit for DC cables.C Conduit for communication cables. A AA
C
B B B B
BBBBB
Technical Information Technical Data - preliminary
SMA Solar Technology AG 8/13
5 Technical Data - preliminaryIn this section you will find the technical data for the Sunny Central's operation, the norms to which it conforms and the required cables and torques.
Solar Generator Connection Data
Inverter Output Data
General Data
DC input voltage 300 ... 600 V DCInput voltage, MPP range 330 ... 600 V DC at full powerDC starting voltage 400 V DC (adjustable)Max. input current 1,600 ADC voltage ripple (peak to peak) < 3 %
Nominal output power up to 113 °F (45 °C) 500 kWOutput power at 122 °F (50 °C) approx. 347 kWOutput power at 300 V DC 460 kWNominal AC voltageOperating range
200 V AC 3 phase without neutral180 ... 220 V AC
AC nominal frequencyOperating range
60 Hz59.8 ... 60.5 Hz
Max. AC current 1470 A AC (at 200 V AC)
Inverter technology True sine wave, current source, high frequency PWM without galvanic insulation
Max. operating altitude 13,000 ft. above sea level.Power Reduction:The Sunny Central can function without power reduction up to 3,300 feet above sea level. At higher altitudes the power is reduced by 5 % per 3,300 ft.
Technical Information Technical Data - preliminary
SMA Solar Technology AG 9/13
Efficiency
5.1 Measurement Accuracy - preliminaryThe Sunny Central is not equipped with a calibrated meter. The display values may deviate from the actual values and must not be used as a basis for invoicing. The Sunny Central’s measured values are required for the system management and to control the current to be fed to the grid.
Deviation
Ambient temperatures -13 °F ...113 °F (-25 °C ... 45 °C) (without power reduction)113 °F ...122 °F (45 °C ... 50 °C) (with power reduction)
Cooling Temperature-controlled forced fans for cooling. Easily removable filters, easily accessible.
Dimensions W x H x D, including roof, in in. approx. 98.4 x 89.7 x 35.4Weight approx. 3,970 lbs. Enclosure rating NEMA 3R, zinc-plated and coated steelCurrent THD < 5 % (with respect to IEEE 1547)Power factor > 0.99 at nominal powerInternal consumption <180 W Standby, <1,600 W with fans
Maximum efficiency approx. 98 %
Voltage measurement approx. +/–5.6 VFrequency measurement approx. +/–0.06 %Disconnect time approx. +/–3 %
Technical Information Technical Data - preliminary
SMA Solar Technology AG 10/13
5.2 Torques and Cable SizesCopper conductors only - use solid, or stranded copper only.
Connection of the Solar ModulesSunny Central with 6 DC Fuses each with maximum 450 A
Sunny Central with 7 DC Fuses each with maximum 400 A
Sunny Central with 8 DC Fuses each with maximum 350 A
Sunny Central with 9 DC Fuses each with maximum 300 A
For fuse sizing please refer to NEC 2008.
Connection to the AC Grid
Number of DC Strings Cable Size TorqueDC+, DC–, PE 6 800 kcmil All 194 °F (90 °C)
copper wire, 315 in-lbs tightening torque
12 350 kcmil
Number of DC Strings Cable Size TorqueDC+, DC–, PE 7 600 kcmil All 194 °F (90 °C)
copper wire, 315 in-lbs tightening torque
14 300 kcmil
Number of DC Strings Cable Size TorqueDC+, DC–, PE 8 500 kcmil All 194 °F (90 °C)
copper wire, 315 in-lbs tightening torque
16 4/0 AWG
Number of DC Strings Cable Size TorqueDC+, DC–, PE 9 400 kcmil All 194 °F (90 °C)
copper wire, 315 in-lbs tightening torque
18 4/0 AWG
Number of AC Cables Cable Size TorqueA, B, C 3 x 5 600 kcmil All 194 °F (90 °C)
copper wire, 315 in-lbs tightening torque
PE 1 3/0 AWG - 600 kcmil 500 in-lbs
Technical Information Transformer Requirements
SMA Solar Technology AG 11/13
6 Transformer Requirements
The transformers must comply with the following technical specifications:• The transformer is suitable for operation with a pulsed inverter.• The transformer is provided with separate galvanically isolated low-voltage windings for every Sunny
Central.• Upon thermal rating of the transformer, take the Sunny Central's load curve and the ambient conditions at
the installation site into account.• Further technical requirements for the transformer:• The transformer complies with all necessary requirements and standards.
WarrantySMA Solar Technology only accepts the warranty for transformers that have been purchased from SMA Solar Technology.
Impedance voltage Uk ≤ 6 %Maximum voltage pulse rate between shield winding and ground
dU/dt 500 V / µs
Maximum voltage to ground during operation with pulsed inverter
800 V
Possible vector group of the transformer Dy5, Dy5y5, Dy11, Dy11y11, YNd11, YNd11d11Without grounding at the neutral point
Output voltage Sunny Central 500HE-US 200 V L_L
Technical Information Transformer Requirements
SMA Solar Technology AG 12/13
Diagram voltage pulse rate dU/dtVoltage pulse rate between shield winding and ground
Block diagram of a transformator with vector group Dy11y11 or Dy5y5
800 V max
283 V peak
1 V
1 W1 U
642135
642135
642135
642135
642135
642135
1 W 1 V 1 U
3W 3V 3U 2W 2V 2U
3W
3V
3U
2W
2V
2U
Technical Information Appendix
SMA Solar Technology AG 13/13
7 Appendix100.8 in.
89
.7 in
.
6 in
.
25
.7 in
.
52.2 in. 48.3 in.2
2.2
in.
28.1 in.1
.5 in
.
45.1 in. 47.3 in.
43.1 in.
29
.7 in
.
31
.7 in
.
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