Installation requirements for SUNNY CENTRAL 500HE-US · Technical Information Transport and Installation SMA Solar Technology AG 3/13 3 Transport and Installation This section shows

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


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.



• 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.



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.



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


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


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.



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 %



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



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



14 300 kcmil



16 4/0 AWG



18 4/0 AWG

Number of AC Cables Cable Size TorqueA, B, C 3 x 5 600 kcmil All 194 °F (90 °C)


PE 1 3/0 AWG - 600 kcmil 500 in-lbs

Technical Information Transformer Requirements


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


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


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

.

Documents

Installation requirements for SUNNY CENTRAL 500HE-US · Technical Information Transport and Installation SMA Solar Technology AG 3/13 3 Transport and Installation This section shows