SCxxxHE-20-IA-IEN111210 | 98-40005110 | Version 1.0 EN

Central inverterSUNNY CENTRAL 500HE/630HE/720HE/760HE/800HEInstallation Manual

SMA Solar Technology AG Table of Contents

Installation Manual SCxxxHE-20-IA-IEN111210 3

Table of Contents1 Information on this Manual. . . . . . . . . . . . . . . . . . . . . . . . . 72 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.1 Intended Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.2 Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.3 Skilled Workers Qualification . . . . . . . . . . . . . . . . . . . . . . . . . . 123 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.1 Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.1.1 Design and Function of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . 133.1.2 Serial Number and Device Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153.1.3 Symbols on the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153.1.4 Touch Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163.1.5 Indicator lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163.1.6 Quick-Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.1.7 Key Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173.2 Sunny Central Communication Controller. . . . . . . . . . . . . . . . . 184 Delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194.1 Check for Transport Damage . . . . . . . . . . . . . . . . . . . . . . . . . . 194.2 Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216 Preparation for Installation . . . . . . . . . . . . . . . . . . . . . . . . 226.1 Installation Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 226.1.1 Dimensions of the Sunny Central. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226.1.2 Ambient Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226.1.3 Minimum Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236.1.4 Requirements for Cable Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266.1.5 Requirements for cable routing between inverter and transformer . . . . . . . . 27

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6.2 Preparing the Station Floor for Installation . . . . . . . . . . . . . . . . 286.2.1 Position of the mounting holes for the Sunny Central . . . . . . . . . . . . . . . . . . 286.2.2 Drilling mounting holes in the station floor . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7 Transporting the Sunny Central . . . . . . . . . . . . . . . . . . . . 297.1 Center of gravity of the inverter . . . . . . . . . . . . . . . . . . . . . . . . 297.2 Transporting the Sunny Central with a Forklift . . . . . . . . . . . . . 307.3 Mounting the kick plates at the rear of the inverter. . . . . . . . . . 307.4 Transporting the Sunny Central with a Pallet Truck . . . . . . . . . . 317.5 Transporting the Sunny Central with a Crane . . . . . . . . . . . . . . 328 Installation of the Sunny Central. . . . . . . . . . . . . . . . . . . . 348.1 Sealing the exhaust air zone . . . . . . . . . . . . . . . . . . . . . . . . . . 348.2 Fastening the Inverter on the Foundation . . . . . . . . . . . . . . . . . 348.3 Disassembling the Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348.4 Removing the Transport Lock from the Inverter Cabinet . . . . . . 359 AC and DC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 369.1 Safety during Cable Connection . . . . . . . . . . . . . . . . . . . . . . . 369.2 Connection Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369.3 Connection area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379.3.1 DC Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379.3.2 DC Busbar. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389.4 Cable Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399.4.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399.4.2 Cleaning the contact surfaces of terminal lugs and

connection lugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399.4.3 Connecting cables with 1 terminal lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409.4.4 Connecting cables with 2 terminal lugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419.5 Connecting the PE cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

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9.6 Connecting the DC cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429.6.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429.6.2 Connecting the SMB Connection Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429.6.3 Connecting the DC Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 439.7 Connecting the AC Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . 449.8 Mounting the kick plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4410 Cable Connection in the Connection Cabinet . . . . . . . . . 4510.1 Connection area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4510.2 Preparing the Cable Connection . . . . . . . . . . . . . . . . . . . . . . . 4610.3 Leading the Cables into the Connection Cabinet . . . . . . . . . . . 4710.4 Connecting the Cables in the Connection Cabinet . . . . . . . . . . 4810.4.1 Connecting the cables to the customer terminal block . . . . . . . . . . . . . . . . . 4810.4.2 Important Measures for Non-utilized Options. . . . . . . . . . . . . . . . . . . . . . . . 4810.4.3 Connecting the Sunny String-Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4910.4.4 Connecting the Remote Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4910.4.5 Connecting the External Target Value Specification . . . . . . . . . . . . . . . . . . . 5010.4.6 Connecting the Transformer Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5110.4.7 Connecting the External Voltage Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5110.4.8 Connecting the External Quick-Stop Cabling . . . . . . . . . . . . . . . . . . . . . . . . 52

11 Connection of the Communication Devices . . . . . . . . . . . 5411.1 Structure of a Plant Network. . . . . . . . . . . . . . . . . . . . . . . . . . . 5411.2 Position of the communication ports . . . . . . . . . . . . . . . . . . . . . 5511.3 Building a Plant Network with Copper Cables . . . . . . . . . . . . . 5611.4 Building a Plant network with Optical Fibers . . . . . . . . . . . . . . 5612 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5712.1 Commissioning the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5712.2 Checking the Cabling on the Inverter . . . . . . . . . . . . . . . . . . . . 58

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12.3 Checking the Inverter Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . 5912.3.1 Checking the DC Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5912.3.2 Checking the AC Grid Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6012.3.3 Checking the External Voltage Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6112.4 Mounting the Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6212.5 Inserting Fuses or Disconnecting Blades . . . . . . . . . . . . . . . . . . 6212.6 Switching on the Voltage Supply . . . . . . . . . . . . . . . . . . . . . . . 6312.7 Switching on the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6413 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6514 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6614.1 Sunny Central 500HE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6614.2 Sunny Central 630HE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6714.3 Sunny Central 720HE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6814.4 Sunny Central 760HE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7014.5 Sunny Central 800HE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7115 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

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1 Information on this ManualValidityIt is valid for the following device types with firmware version 01.14.12.R or higher:

• Sunny Central 500HE (SC 500HE-20)• Sunny Central 630HE (SC 630HE-20)• Sunny Central 720HE (SC 720HE-20)• Sunny Central 760HE (SC 760HE-20)• Sunny Central 800HE (SC 800HE-20)

Target GroupThis manual is intended for skilled workers. Only qualified personnel are allowed to perform the tasks set forth in this manual (see section 2.3 "Skilled Workers Qualification", page 12).

Additional InformationAdditional information is available at www.SMA.de/en:

Information Document typeInstallation requirements for Sunny Central 500HE/630HE/720HE/760HE/800HE

Technical information

Medium-voltage Transformers − Important requirements for medium-voltage transformers for Sunny Central of the HE and CP range.

Technical information

COM-B − Communication distributor for large-scale plants with Sunny Central, Sunny Mini Central or Sunny Tripower

Technical information

Sunny Main Box ‒ Connecting the DC cabling for PV inverters Technical information

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Symbols

Typography

NomenclatureIn this manual, the Sunny Central of the HE series is referred to as Sunny Central or inverter.In this manual, the Sunny Central Communication Controller is also referred to as SC-COM.

Symbol ExplanationIndicates a hazardous situation which, if not avoided, will result in death or serious injury.Indicates a hazardous situation which, if not avoided, could result in death or serious injury.Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.Indicates a situation that can result in property damage if not avoided.

Indicates information that is important for a specific topic or objective, but is not safety-relevant.

Indicates a requirement for meeting a specific goal. Desired result. Undesired result. Followed by a solution on how to achieve the desired result.

Typography Usage Example"light" • Display messages

• Parameters• Terminals• Sockets

• The inverter switches into the "Waiting" operating state.

bold • Elements which you should select

• Elements which you should enter

• Set parameter "FanTest" to 1.

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2 Security2.1 Intended UseThe Sunny Central is a central inverter which converts the direct current from PV modules into alternating current. Here, the maximum permissible DC input voltage must not be exceeded. The Sunny Central is suitable for indoor installation, providing that the specified safety distances are complied with. The enclosure complies with the IP21 protection class. IP21 means that the closed inverter is protected against vertically falling dripping water. The inverter is classified under Class 3 C1L according to EN 60721-3-3.Inverters of the HE series may only be operated in connection with a suitable transformer. The transformer must be designed for the voltages that arise during pulsed operation of the inverter. The voltages can reach a magnitude of maximum ±1 450 V to ground. (see Technical Information "Medium-voltage Transformer" at www.SMA.de/en).Do not switch off or change settings that affect grid management without first obtaining approval from the distribution grid operator.

Figure 1: Principle of a grid-tie PV plant with an inverter

Position DescriptionA PV modulesB Sunny String-MonitorC Sunny CentralD Medium-voltage TransformersE Power distribution grid

A B C D E

SMA

SMA

HE

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2.2 Safety InstructionsElectrical RiskRisk of electric shock when touching conductive partsHigh voltages that can cause electrical shocks are present in the inverter. Work on the inverter is only allowed if the power is disconnected and in compliance with the guidelines that apply at the installation location.

• Disconnect the following components:– Grid voltage for grid feeding– Internal supply– DC voltage from the PV array– Additional external voltages (e.g., control signals of a control room)

• Ensure that the device cannot be reconnected.• Ensure that no voltage is present.• Ground and short-circuit.• Cover or safeguard any adjacent live components.

Electric shock through capacitors not fully dischargedHazardous voltages may still be present in the inverter even if the AC and DC main switches are switched off.

• Wait at least 12 minutes after switching off the inverter.Electric shock caused by damage on the inverterThe operation of a damaged inverter can lead to serious or lethal injuries through electric shock.

• Operate the inverter only in technically proper and operationally safe status.• Check the inverter regularly for visible damage. • Ensure that all safety features are freely accessible at all times.• Regularly check for correct functioning.

Electric shock caused by ground faultIn case of a ground fault, assume that grounded plant components are still live.

• Ensure that no voltage is present before touching.Electric shock when entering the PV fieldThe insulation monitoring device with GFDI or Remote GFDI does not provide protection from injury when GFDI is activated. PV modules grounded by means of GFDI disperse voltage to ground. When entering the PV field, lethal electric shocks may occur.

• Before entering the PV field, switch the PV modules to insulated operation.• Ensure that the insulation resistance of the PV field is greater than 1 k Ω .

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Electric shock resulting from a failure to comply with safety requirementsFailure to follow this manual, the general instructions or safety instructions may lead to severe injury due to electric shock.

• Only perform work as described in this manual. Observe all safety instructions.• Establish all electrical connections according to the circuit diagram.• Safely store the documentation within the immediate area of the inverter. It must be accessible

to service and maintenance personnel at all times.Electrostatic discharge can damage electronic componentsElectrostatic discharge can destroy component parts.

• During work on the inverter and handling of the components, observe the ESD protection regulations and wear protective gloves.

• Discharge electrostatic charges through contact with unvarnished, grounded enclosure parts (e.g., on the PE connection of the doors). Only then is it safe to touch any electronic components.

Burn HazardSome components, such as fuses, can become hot during operation.

• Wear safety gloves when working on the inverter.

Inverter DamageTampering with the device may result in plant damage.

• Do not operate the inverter while the door is open. If the key remains in the door lock, the inverter can be opened by unauthorized persons.

• Remove the key from the door locks and from the key switch. • Keep the keys in a safe place.

Penetrating moisture can damage the inverter. • Do not open the inverter when it is raining or in case of humidity > 95%.

Electrostatic discharge can destroy components.• During work on the inverter and handling of the components, observe the ESD protection

regulations and wear protective gloves. • Discharge electrostatic charges through contact with unvarnished, grounded enclosure parts

(e.g., on the PE connection of the doors). Only then it is safe to touch any electronic components.Warning signs must be easily readable at all times and must be replaced in the event of damage.

Hazard due to blocked escape routeOpening of the doors of 2 opposing inverters blocks the escape route. It is imperative that the escape route is freely accessible at all times. Make sure the minimum passage width of the route meets local standards. In Germany, the minimum passage width is 500 mm.

• Only the door of one inverter may be open at any given time.

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2.3 Skilled Workers QualificationAll work on the inverter may only be carried out by qualified technical personnel. Qualified means that the personnel has the relevant training for the tasks.For commissioning and operating the inverter, the personnel must be familiar with the installation manual and the user manual. Observe safety instructions.

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3 Product Description3.1 Sunny Central

3.1.1 Design and Function of the Sunny CentralThe Sunny Central is a PV inverter that converts the direct current from the PV array into alternating current for the grid.

Figure 2: Sunny Central, using the example of a Sunny Central 800HE with touch display

Position DescriptionA Inverter cabinetB Connection cabinetC Touch displayD Service interfaceE Key SwitchF Quick-Stop

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Figure 3: Sunny Central, using the example of a Sunny Central 800HE with indicator lights

The Sunny Central can implement the requirements of the distribution grid operator with the aid of the Power Reducer Box or the Sunny Central Communication Controller.

Position DescriptionA Inverter cabinetB Connection cabinetC Indicator lightsD Service interfaceE Key SwitchF Quick-Stop

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3.1.2 Serial Number and Device TypeThe serial number (Serial No.) and device type (Type) of the Sunny Central are listed on the type label. The type label is located on the inside of the right door on both the inverter cabinet and the connection cabinet.

3.1.3 Symbols on the Sunny CentralAll the symbols on the Sunny Central and the type label are explained below.

Reading off the serial numberYou can identify the serial number without opening the inverter. The serial number is located at the bottom right on the outside of the switch cabinet door. You can also read off the serial number from the display.

Reading off the firmwareYou can read off the version number of the firmware from the inverter and the display via the user interface of the Sunny Central Communication Controllers or from the display.

Symbol DescriptionCE mark.The Sunny Central complies with the relevant provisions of the European Community.Protection class I.All operating facilities are connected to the protective conductor system of the Sunny Central.Degree of protection IP 21.The Sunny Central is protected against dripping water.Beware of dangerous electrical voltage.The Sunny Central operates at high voltages. All installation work on the Sunny Central must be performed by electrically skilled persons only.Center of gravity of the inverter.

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3.1.4 Touch DisplayDepending on which option is ordered, the Sunny Central may be equipped with a touch display. Different kinds of inverter data can be viewed on the touch display. The touch display is only used as a means for viewing data. The display switches off if it is inactive for more than 5 minutes. It switches on when it is touched.

3.1.5 Indicator lightsDepending on which options are ordered, the Sunny Central may be equipped with 3 indicator lights. The indicator lights show the status of the inverter. The functions of each status are described below.

Condition Description FunctionGreen indicator light glows continuously

Feed-in operation

The Sunny Central is feeding into the power distribution grid.

Yellow and green indicator lights glow continuously

Limited operation

The Sunny Central has detected a warning. The warning currently does not affect the operation of the Sunny Central.

Yellow indicator light glows continuously

Warning The Sunny Central is currently not feeding power into the grid and has detected a warning. It is automatically reset as soon as the warning is no longer present.This status is used, for instance, when the level of irradiation is low.

Red indicator light glows continuously

Fault The Sunny Central has detected a fault and is now switched off.

All indicator lights are off

No feed-in operation

The Sunny Central is not feeding into the grid, the supply voltage is disconnected, or the key switch is set to "Stop".

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3.1.6 Quick-StopIn case of emergency, this switch enables disconnection of the inverter from the PV array and the medium-voltage grid within 500 ms.

Pressing the quick-stop button opens the DC contactor, switches off the inverter bridge and disconnects the inverter from the AC grid.

3.1.7 Key SwitchThe key switch is used to switch the Sunny Central on and off.

Switch position "Start" After turning the switch to the "Start" position, the Sunny Central switches from "Stop" mode to "Grid monitoring" mode. If there is sufficient irradiation and a valid grid connection, the Sunny Central switches to feed-in operation. If there is insufficient irradiation, the input voltage is too low for startup, and the Sunny Central remains in the "Grid monitoring" state.

Switch position "Stop"If the key switch is turned to "Stop" when the Sunny Central is in the "Grid monitoring" mode, a motor drive automatically shuts off the DC main switch. The Sunny Central goes into the "Stop" mode.If the key switch is turned to "Stop" when the Sunny Central is in "MPP load operation", the Sunny Central switches to the operating state "Shutdown". Once shutdown is complete, the AC contactor and the DC main switch turn off automatically and the Sunny Central goes into "Stop" mode.

Tripping the quick-stop functionThe quick-stop function may only be tripped if there is imminent danger.Pressing the quick-stop button does not trip rapid discharge of the capacitor.

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3.2 Sunny Central Communication ControllerThe SC-COM is the central communication interface of the inverter. The SC-COM establishes the connection between the inverter and the plant operator.

Figure 4: SC-COM

The SC-COM collects all data from the connected devices. The SC-COM enables monitoring, parameterization and remote diagnosis of the inverter via computer, as well as power regulation by the grid operator.These various tasks performed by the SC-COM can be organized in 2 separate networks:

• Monitoring network: takes care of the monitoring, parameterization and remote diagnosis functions.

• Regulation network: here, the specifications issued by the distribution grid operator for grid stability management are transmitted. Since the regulation network is used exclusively for transmitting the data of the distribution grid operator, the specifications are made available in the requisite time.

If there is only a low level of data flow in the monitoring network, the grid operator specifications can also be transmitted via the monitoring network. In this case, there is no need for 2 networks.The operator can access all data stored in the SC-COM via an Ethernet connection.You can set the parameters of the inverter via the SC-COM.The networks are realized on the basis of copper cables or optical fibers.

PV Plant Communication Type

The interface of the SC-COM is set by default to "COM 3". The default setting of the baud rate for the following options is:

• Option 11/0 without hub: baud rate 115 200• Options 11/1 and 11/2 with hub: baud rate 19 200

Do not modify these settings.

HE SUNNY CENTRAL

STRING MONITOR CONTROLLER

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4 Delivery4.1 Check for Transport DamageEvery inverter has been thoroughly checked by SMA Solar Technology AG before leaving our factory. Despite the robust packaging, damage can occur during shipping and transport. Carry out a visual inspection of the inverter before installation. Should you find any visible damage, contact your retailer and the transport company responsible for the delivery of the inverter.

4.2 Scope of DeliveryCheck the delivery for completeness and any visible external damage. Contact your retailer or the SMA Serviceline if the delivery is incomplete or damaged.

Figure 5: Delivery components

Position Quantity DescriptionA 1 Sunny CentralB 1 SMA documentation set:

installation manual, user manual, circuit diagram,commissioning report

C 6 Kick plateD 1 LV/HRC fuse handleE 1 Non-woven abrasiveF 34 ScrewG 34 NutH 68 Fender washer

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I 68 Spring washerK 80 Cable tieL 3 Rubber seal (9.5 mm … 17 mm)

Position of the LV/HRC fuse handle For order option DC fuse, the LV/HRC fuse handle is to be found on the inner side of the right door of the connection cabinet.

Position Quantity Description

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5 StorageIf you need to store the inverter prior to final installation, note the following points:

Penetrating moisture can damage the inverter.• Only store the inverter in a closed state.• Storage permissible in dry, covered locations only. Observe the conditions for degree of

protection IP 21.• Temperature at the storage location between ‒20°C … +50°C.

An uneven foundation may damage the frame construction. • The foundation must be suitable for the weight of the inverter of 1 670 kg.• Unevenness of the foundation max. 0.25%.

Storage in cold conditions and high humidityIf when storing the Sunny Central you connect the external voltage supply and switch on the miniature circuit-breaker of the external voltage supply, the heater is activated automatically in the event of high humidity. The connection of the external voltage supply is described in section 10.4.7 "Connecting the External Voltage Supply", page 51.

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6 Preparation for Installation6.1 Installation Site Requirements

6.1.1 Dimensions of the Sunny Central

Figure 6: Dimensions

6.1.2 Ambient Conditions The required amount of supply air is available. If the required amount of air cannot be

guaranteed, install an extra ventilation, e.g., external fans. The installation site must be accessible at all times. The altitude of the installation site must be below the maximum installation altitude

(see section 14 "Technical Data", page 66). The ambient temperature must be within the operating temperature range

(see section 14 "Technical Data", page 66). The installation site is compliant with the requirements on ambient conditions

(see "Installation Conditions for Sunny Central 500HE/630HE/720HE/760/HE/800HE”).

Height Width Depth2 093 mm 2 404 mm 906 mm

HE

906 mm 1 202 mm

10

0 m

m 1 202 mm

2 404 mm

2 0

93

mm

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6.1.3 Minimum Clearances

Minimum clearance for 1 inverter

Figure 7: Minimum clearances of the inverter

The exhaust air vent is located at the rear of the inverter. For the optimum operation of the inverter, observe the following points:

• Do not block or close the exhaust air vent.• Ensure that the station is equipped with a suitable exhaust air vent.• In order to prevent thermal short circuits in the inverter, ensure that there are exhaust air ducts

in closed rooms.• The exhaust air vents must be accessible for cleaning at all times.

Danger of fire due to overheating of cables. Differing cable lengths result in excessive heating of the cables.

• All line conductors from the inverter to the transformer must be of the same length. • The cable length between the connection points must not exceed a maximum of 15 m.

Damage to the inverter and transformer due to discharged air being sucked in.• Install the plant so that the inverter cannot suck in any exhaust air.

HE

300 mm

22

0 m

m

300 mm1 200 mm

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24 SCxxxHE-20-IA-IEN111210 Installation Manual

Figure 8: Minimum clearance for 1 inverter in an electrical equipment room

Position DescriptionA Minimum passage width

Maintain the minimum passage width between the open door of the Sunny Central and the next fixed obstacle. The minimum passage width must comply with national standards. In Germany, the minimum passage width is 500 mm.

B Inverter

A

B

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Minimum clearances for 2 inverters

Figure 9: Minimum clearances for 2 inverters in an electrical equipment room

Position DescriptionA Minimum passage width

Maintain the minimum passage width between the open door of the Sunny Central and the next fixed obstacle. The minimum passage width must comply with national standards. In Germany, the minimum passage width is 500 mm.

B Inverter

In order to comply with the escape route regulations, only one inverter may be open at a time.

Danger due to blocked escape routeOpening of the doors of 2 opposing inverters blocks the escape route. It is imperative that the escape route is freely accessible at all times. Make sure the minimum passage width of the route meets local standards. In Germany, the minimum passage width is 500 mm.

• Only the door of one inverter may be open at any given time. • Observe the minimum passage width.

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6.1.4 Requirements for Cable Routing

Cable entries are located in the connection cabinet. Empty tubes for the cable routing have been laid

under the foundation. The communication cables are separated from

the AC and DC cables. An appropriate number of cable entries

is provided:– AC cables: 3– DC cables: according to the number of

DC cables– PE cables: 1– Communication cables: 1

Figure 10: Cable entries for 9 DC inputs (example)

Laying the cablesThis document does not specify at what time the cables are to be laid in the foundation. The time for laying the cables must be decided individually for the particular plant.

Position DescriptionA Entry for AC cableB Entry for DC cableC Entry for PE cableD Entry for communication cable

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6.1.5 Requirements for cable routing between inverter and transformer

The AC cables are 3-phase cables. Between the transformer and the inverter, there are 3 separate cable routes, e.g., cable

channels, for the AC cables. The spacing between the cable routes must be at least twice the diameter of an AC cable.

Figure 11: Arrangement of AC cables with three cables per line conductor (example).

Observe cable clearancesLay an L1, L2 and L3 line conductor in each cable route. The spacing between the cable pairs must be at least twice the diameter of a cable. This prevents current imbalances.

L2

L1 L3

L2

L1L3

L2

L1 L3

1d

>2d-- >2d--

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6.2 Preparing the Station Floor for Installation

6.2.1 Position of the mounting holes for the Sunny CentralBefore installing the inverter, prepare the mounting fixtures in the floor.There are 4 mounting brackets in the base area of the inverter for anchoring in the foundation.

Figure 12: Position of the mounting brackets on the inverter

6.2.2 Drilling mounting holes in the station floor1. Mark the positions of the mounting holes on the foundation corresponding to the mounting

brackets.2. Drill mounting holes at the marked places in the foundation.

Position DescriptionA Mounting brackets

2 404 mm

16 mm

90

6 m

m

77

3 m

m

A

A

A

A

2 470 mm

2 510 mm

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7 Transporting the Sunny Central7.1 Center of gravity of the inverterThe center of gravity of the inverter is marked on the packaging and on the enclosure with the appropriate symbol.

Center of gravity of the inverterThe center of gravity is not in the middle of the Sunny Central. Keep this in mind during transportation of the Sunny Central.

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7.2 Transporting the Sunny Central with a Forklift

1. Move the forklift under the inverter from the front or the rear. Use the fork bracket. This will prevent the Sunny Central from slipping during transport.

2. Secure the inverter, e.g., with retaining straps, to prevent it tipping over.3. Raise the inverter slightly.4. Transport the inverter to the installation site.

7.3 Mounting the kick plates at the rear of the inverterPrior to aligning the inverter on the foundation, the kick plates must be fastened in place at the rear of the inverter.

1. Mount the kick plates at the rear of the inverter in the prescribed position.2. Attach the kick plates to the inverter using a Torx screwdriver.

Danger of crushing if the raised Sunny Central tips over or falls during lifting.If the inverter is raised and transported without due care or too quickly, it may tip over or fall.

• Transport the Sunny Central as close to the ground as possible at all times.• Use all suspension points for transportation.• Avoid fast or jerky movements with the forklift.• Keep a safe distance from the Sunny Central at all times during transport.• All means of transport used must be designed for the weight of the Sunny Central of 1 670 kg.

Damage to the inverter due to inappropriate transport.• Never place the inverter on an unstable, uneven surface, not even for a short period of time.• Do not transport the inverter with mounted kick plates.

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7.4 Transporting the Sunny Central with a Pallet Truck

1. Approach the inverter with the pallet truck from the side. This will prevent the inverter from tipping over.

2. Raise the inverter slightly.3. Transport the inverter to the installation site.

Danger of crushing if raised Sunny Central tips over, falls or sways during lifting.If the inverter is raised and transported without due care or too quickly, it may tip over or fall.

• Always approach the inverter with the pallet truck from the side.• Transport the Sunny Central as close to the ground as possible at all times.• Use all suspension points for transportation.• Avoid fast or jerky movements with the pallet truck.• Keep a safe distance from the Sunny Central at all times during transport.• All means of transport used must be designed for the weight of the Sunny Central of 1 670 kg.

Damage to the inverter due to inappropriate transport.• Only place the inverter on firm, level surfaces.• Do not transport the inverter with mounted kick plate.

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7.5 Transporting the Sunny Central with a Crane

1. Attach hooks of the steel cables/chains or lifting hook shackles to all 4 crane eyes on the Sunny Central.

2. If the inverter is transported with the crane fork, it must approach the inverter from the front.

Danger of crushing if raised Sunny Central tips over, falls or sways during lifting.If the inverter is raised and transported without due care or too quickly, it may tip over or fall.

• Transport the Sunny Central as close to the ground as possible at all times.• Use all suspension points for transportation.• Use steel cables or chains with lifting hooks and shackles.• Avoid fast or jerky movements with the crane.• Keep a safe distance from the Sunny Central at all times during transport.• All means of transport used must be designed for the weight of the Sunny Central of 1 670 kg.

Damage to the inverter due to inappropriate transport.• Put the inverter down on firm, level surfaces only.

HE

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3. Raise the crane hook slowly until the steel cables or chains are tensioned.

4. Ensure that all steel cables and load hooks or load beams and shackles are attached correctly.5. Raise the inverter slightly.6. Transport the inverter to the installation site.

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8 Installation of the Sunny Central8.1 Sealing the exhaust air zoneWhen the inverter is installed in the station, the exhaust air vent of the inverter must be connected to the exhaust air of the station. The connections between the openings must be sealed tight. This will ensure that all the warm air exhausted from the inverter is ducted out.

8.2 Fastening the Inverter on the FoundationOnce the inverter has been aligned on the foundation, you can fasten it in place with concrete screw anchors.Additional mounting material (not included in the scope of delivery): 4 suitable concrete screw anchors must be provided.• Insert the screw anchors through the brackets on the inverter into the foundation. The exact

procedure depends on the type of screw anchors used.

8.3 Disassembling the Panels

The panels are located in the lower section of the connection cabinet.

1. Remove the panel screws using a Torx screwdriver (T30). 2. Carefully remove the front panel of the connection area. First, pull the panel forwards by

80 mm … 100 mm.3. Detach PE cable from the rear side of the panel.

Damage to the inverter due to overheating.Non-existent or inadequate sealing between the exhaust air vent of the inverter and the exhaust air zone of the station may result in overheating of the inverter.

• Make sure that the warm exhaust air from the inverter is ducted out. When selecting the sealing material make sure it is suited for air temperatures of up to +70°C.

Damage due to PE cables being ripped out.The panels are connected to the inverter via PE cables.

• When dismantling the panels, take care not to damage the PE cables.

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4. Remove the panels.

5. Remove the screws from the Plexiglas cover and remove the cover from the inverter.

8.4 Removing the Transport Lock from the Inverter CabinetSubject to the production version, the inverter power units are secured during transport with ESD-protected bubble wrap.

1. Open the inverter cabinet.2. Remove the bubble wrap from each of the

3 inverter bridges. Observe the safety measures for ESD protection.

3. Close the inverter cabinet.

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9 AC and DC Connection9.1 Safety during Cable ConnectionRisk of fire Too low ampacity of the connection cables leads to strong heating.The connection cables must have sufficient ampacity. The ampacity depends on the following conditions:

• Cable cross-section• Cable type• Routing method• Ambient conditions• Only use aluminum cables or copper cables.

Inadequate connections and oxidized contact surfaces cause excessive heating.Tin-plated copper rails are standardly provided in the inverter for the connection of copper or aluminum cables.

• Only use the nuts, screws and washers provided in the scope of delivery for the connection.• Only use tin-plated crimp-type terminal lugs.• Always connect 2-hole terminal lugs with 2 screws.• Before connecting the cables, clean the contact surfaces (see section 9.4.2).• Do not touch the contact surfaces after cleaning.

Non-observed torques cause strong heating.To ensure the required ampacity at the connection points, all torques specified in this document must be observed.

• For connections of tin-plated aluminum terminal lugs, observe a torque of 37 Nm.• For connections of tin-plated copper terminal lugs, observe a torque of 60 Nm.

9.2 Connection OptionsDC Fuses or DC BusbarDepending on the order option, the inverter will be equipped with either DC fuses or DC busbars. Each terminal lug can be assigned with 1 or 2 cables. You can connect 1-hole or 2-hole terminal lugs to the DC fuses.You can only connect 1-hole terminal lugs to the DC busbar.

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Grounding the PV modulesDepending on the configuration option, you can connect positive or negative grounded PV modules, or ungrounded PV modules, to the Sunny Central.

9.3 Connection area

9.3.1 DC Fuses

Figure 13: Connection area (example)

Position DescriptionA Connection lug PE cableB Connection lugs DC‒ cablesC Connection lugs DC+ cablesD Connection lug AC cable - line conductor L3E Connection lug AC cable - line conductor L2F Connection lug AC cable - line conductor L1

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9.3.2 DC Busbar

Figure 14: Dimensions of the DC busbar

Position DescriptionA Connection lug PE cableB Connection lug DC‒ cableC Connection lug DC+ cableD Connection lug AC cable - line conductor L3E Connection lug AC cable - line conductor L2F Connection lug AC cable - line conductor L1

A B

C

D

E

F

34 mm

90

mm

80

mm

80 mm

14

mm

14

mm

33

0.8

mm

329.5 mm

487.5 mm

17

9 m

m

27

4 m

m

47

6 m

m

64

8 m

m

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9.4 Cable Connection

9.4.1 RequirementsCable

• Only use copper or aluminum cables. • AC cables are designed to carry maximum voltages of 1 450 V to ground and an effective

value of 800 V.• Connect a maximum of 2 DC cables to each fuse input.

Terminal lugs• Only use tin-plated crimp-type terminal lugs.• The width of the terminal lugs must exceed the washer diameter (32 mm). This will ensure that

the defined torques are effective over the whole surface.

9.4.2 Cleaning the contact surfaces of terminal lugs and connection lugs

1. Clean the contact surfaces with a clean cloth and ethanol cleaner.2. Clean the contact surfaces with the non-woven abrasive included in the delivery until they have

a slight metallic shine. Avoid damage to the coated contact surfaces.3. Remove metal dust with a clean cloth and ethanol cleaner.4. Do not touch the contact surfaces again after cleaning.

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9.4.3 Connecting cables with 1 terminal lugOnly use the screws and nuts included in the scope of delivery for fastening terminal lugs and connection lugs.

Figure 15: Assembly of the connection for 1 terminal lug

• Always connect terminal lugs to connection lugs in the order specified above.

Position DescriptionA Screw M12B Spring washerC Fender washerD Copper busbarE1 Tin-plated 1-hole terminal lugE2 Tin-plated 2-hole terminal lugF Nut

E2

D

AB

C

BF

A

BC C

B

F C

A

BC C

B

F

E1

D

A

BC C

B

F

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9.4.4 Connecting cables with 2 terminal lugsOnly use the screws and nuts included in the scope of delivery for fastening terminal lugs and connection lugs.

Figure 16: Assembly of the connection for 2 terminal lugs

• Always connect terminal lugs to connection lugs in the order specified above.

Position DescriptionA Screw M12B Spring washerC Fender washerD1 Tin-plated 1-hole terminal lugD2 Tin-plated 2-hole terminal lugE Copper busbarF Nut

D2

E

D2

BC

BC

A F

A BC

BF

C

BC

BC

A F

D1

E

D1

BC

BC

A F

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9.5 Connecting the PE cables

1. Lead the PE cables into the connection cabinet.2. Strip the PE cable insulation.3. Fit terminal lugs to the PE cables.4. Connect the PE cables to PE connection rail according to circuit diagram and the instructions in

section 9.4.

9.6 Connecting the DC cables

9.6.1 RequirementsCables from the PV modules

• Only use copper or aluminum cables. • A maximum of 2 DC cables can be connected to each fuse input.

9.6.2 Connecting the SMB Connection Kit

To connect the Sunny Main Box to the inverter, you need the SMB Connection Kit. You can only connect the SMB Connection Kit to an inverter with DC fuses. The busbar of the SMB Connection Kit links 3 inverter DC terminals and enables the connection of up to 4 DC cables.

Equipotential BondingGround the inverter according to the applicable regulations.

Risk of lethal electric shock. Voltage is present in PV modules exposed to light.Even after disconnection, high voltages will still be present at the DC input of the inverter if the DC main distribution and DC sub-distribution have not been disconnected.

• If DC main distributions are installed, disconnect the fuses in the main distributions and ensure that the device cannot be accidentally reconnected.

• If DC sub-distributions are installed, disconnect the fuses in the sub-distributions and ensure that the device cannot be accidentally reconnected.

• Observe all safety precautions of the module manufacturer.

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1. Position and screw the busbar firmly over 3 DC terminals.

2. Pull the fuses out of the 3 DC terminal lugs. To do this, use a LV/HRC fuse handle.

9.6.3 Connecting the DC Cables

1. Lead the DC cable into the connection cabinet.2. Strip the DC cable insulation.3. Fit terminal lugs to the DC cables.4. Connect the DC cables to the DC terminal lugs or DC busbar according to the circuit diagram

and the instructions in section 9.4.

Risk of lethal electric shock. Voltage is present in PV modules exposed to light.• If DC main distributions are installed, disconnect the fuses in the main distributions and ensure

that the device cannot be accidentally reconnected.• If DC sub-distributions are installed, disconnect the fuses in the sub-distributions and ensure that

the device cannot be accidentally reconnected.• Observe all safety precautions of the module manufacturer.

Disconnection on the DC SideThe DC main and sub-distribution boxes should be equipped with circuit breakers. Circuit breakers enable trouble-free DC side disconnection of the inverter.

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9.7 Connecting the AC Cables

1. Insert the AC cables through the base into the connection cabinet.2. Strip the AC cable insulation.3. Fit the AC cables with terminal lugs.4. Connect the AC cables to the AC busbar according to the circuit diagram and the instructions

in section 9.4.

9.8 Mounting the kick plates1. Mount the kick plates at the front of the inverter in the prescribed position.2. Attach the kick plates to the inverter using a Torx screwdriver.

Risk of lethal electric shock. High voltages are present on the voltage carrying components of the low-voltage and medium-voltage grids.

• Observe all safety regulations for working with the low-voltage grid and medium-voltage grid.• Disconnect the miniature circuit breakers and ensure that they cannot be accidentally

reconnected.• Disconnect the inverter from the DC sub-distribution and DC main distribution.• Ensure that no voltage is present.

Risk of fire. Differing cable lengths lead to overheating of the cables.• All cables of the line conductors must be of the same length.

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10 Cable Connection in the Connection Cabinet10.1 Connection area

Figure 17: Terminals in the connection cabinet

Position DescriptionA Test and disconnect terminalsB Miniature circuit-breaker of the grid monitoringC Miniature circuit-breaker of the external voltage supplyD Customer connection terminalsE Gasket plate with rubber seals (6 mm … 7 mm)F Cable anchoring rail

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10.2 Preparing the Cable Connection1. Switch off the miniature circuit-breaker of the

external voltage supply.

2. Switch off the miniature circuit-breaker of the grid monitoring.

3. Open the test and disconnect terminals.

4. Unscrew and remove the Plexiglas in front of the fuses.

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Installation Manual SCxxxHE-20-IA-IEN111210 47

5. Remove all fuses and disconnecting blades from all fuse holders. To do this, use a LV/HRC fuse handle.

10.3 Leading the Cables into the Connection Cabinet1. Remove the 4 screws at the top of the gasket plate.

2. Remove the gasket plate.3. Loosen the 3 screws on the side of the gasket plate.

4. Remove the required number of rubber seals from the gasket plate. Make sure that the diameter of the rubber seals corresponds to the diameter to the cables to be inserted. Use the additional rubber seals included in the scope of delivery, if necessary.

5. Remove the sealing plugs from the seals.6. Lead the cables through the rubber seals.7. Insert the rubber seals into the gasket plate without deformation. This will ensure a tight seal.8. Tighten the screws on the side of the gasket plate.9. Screw the gasket plate to the floor of the connection cabinet.

HE

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10.4 Connecting the Cables in the Connection Cabinet

10.4.1 Connecting the cables to the customer terminal block1. Strip cable jacket to approx. 60 mm.2. Strip conductor insulation to 5 mm.

3. Attach the bootlace ferrule to the conductors and crimp gas-tight.4. Connect the cable in accordance with the circuit diagram.

– Insert a screwdriver into the square hole next to the terminal and open the terminal lock by pressing it.

– Connect the cables to the terminals using bootlace ferrules.– Remove the screwdriver from the terminal.

10.4.2 Important Measures for Non-utilized OptionsNon-utilized External Quick-Stop

Non-utilized Remote Shutdown• If you are not using the remote shutdown option, set the parameter "ExtStrStpEna" to Off after

commissioning (see operating manual included in the delivery).

Non-utilized Transformer Protection• If you are not using the transformer protection option, set the parameter "ExtTrfErrEna" to Off

after commissioning (see operating manual included in the delivery).

Damage to the Sunny Central caused by faulty installation of the external quick-stop.If an external quick-stop is installed incorrectly, this may damage the Sunny Central and restrict the function of the quick-stop.

• If no external quick-stop is installed, the terminals must be bridged according to the circuit diagram.

60 mm

15 mm 40 mm 5 mm

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10.4.3 Connecting the Sunny String-Monitor

1. Lead the Sunny String-Monitor cable into the connection cabinet (see section 10.3).2. Connect the cable according to the circuit diagram (see section 10.4.1).3. Remove the shield clamp from the busbar.4. Press the shield clamp onto the cable until it clicks

into place, and fasten hand-tight.

5. Fasten the cable to the cable anchoring rail using a cable tie. This secures the cable from being pulled off.

10.4.4 Connecting the Remote ShutdownWith the remote shutdown unit you can deactivate the Sunny Central e.g. from a control room. The remote shutdown is similar to the stop function of the key switch.

1. Lead the remote shutdown cable into the connection cabinet (see section 10.3).2. Connect the cable according to the circuit diagram (see section 10.4.1).3. Remove the shield clamp from the busbar.4. Attach the shield clamp until it clicks into place, and

fasten hand-tight.

5. Fasten the cable to the cable anchoring rail using a cable tie. This secures the cable from being pulled off.

Sunny String-MonitorYou will find further information in the technical description of the Sunny String-Monitor.

1

2

1

2

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10.4.5 Connecting the External Target Value Specification

1. Lead the external target value specification cable into the connection cabinet (see section 10.3).

2. Connect the cable according to the circuit diagram (see section 10.4.1).3. Remove the shield clamp from the busbar.4. Attach the shield clamp until it clicks into place,

and fasten hand-tight.

5. Fasten the cable to the cable anchoring rail using a cable tie. This secures the cable from being pulled off.

Signal TransmissionExternal target values for reactive and active power are normally specified by the distribution grid operator, and e.g. distributed via a radio ripple control receiver. The Power Reducer Box receives the target values from the radio ripple control receiver and sends these to the inverter via the SC-COM. The inverter then implements the distribution grid operator specification and feeds, for example, a specified reactive power into the power distribution grid. Ask your distribution grid operator which signal transmission is used.If these target values are not transmitted via the SC-COM and Power Reducer Box, there are terminals located in the inverter for connecting the external target value specifications. The inverter processes standard signals from 4 mA ... 20 mA.

How the external target value specification worksYou will find further information on how the external target value specification works in the inverter's operating manual.

1

2

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10.4.6 Connecting the Transformer ProtectionThe inverter is equipped with a connection terminal for the transformer monitoring system of the medium-voltage transformer. This will shut down the inverter immediately in the event of a fault. To use the transformer monitoring, an external voltage supply of 230 V/50 Hz must be provided.

1. Lead the transformer protection cable into the connection cabinet (see section 10.3).2. Connect the cable according to the circuit diagram (see section 10.4.1).3. Remove the shield clamp from the busbar.4. Press the shield clamp down until it clicks into place,

and fasten hand-tight.

5. Fasten the cable to the cable anchoring rail using a cable tie. This secures the cable from being pulled off.

10.4.7 Connecting the External Voltage SupplyThe inverter draws electricity for its internal power supply from the grid via the external voltage supply.Requirements for the external voltage supply:

• External, three-phase auxiliary supply voltage of 230 V (3/N/PE) each

Damage to the inverter due to incorrect power supply connection• Connect the neutral conductor 'N'.• Ground the star point of the transformer for internal power supply.

Miniature circuit-breaker between the external voltage supply and the inverterA type B miniature circuit-breaker with a nominal current of 16 A is installed in the inverter.

• Provide for a selective miniature circuit-breaker for insulating the cable to the inverter.

1

2

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Required Material:• Cable with a maximum conductor cross-section of 4 mm²

1. Lead the external voltage supply cable into the connection cabinet (see section 10.3).2. Connect the cable according to the circuit diagram (see section 10.4.1).3. Fasten the cable to the cable anchoring rail using a cable tie. This secures the cable from being

pulled off.

10.4.8 Connecting the External Quick-Stop CablingThe Sunny Central is equipped by default with a quick-stop button. If the external quick-stop function is required, it can be connected according to the circuit diagram.

1. Lead the external quick-stop cable into the connection cabinet (see section 10.3).2. Connect the cable according to the circuit diagram (see section 10.4.1).3. Fasten the cable to the cable anchoring rail using a cable tie. This secures the cable from being

pulled off.

Damage to the Sunny Central caused by faulty installation of the external quick-stop.If an external quick-stop is installed incorrectly, this may damage the Sunny Central and restrict the function of the quick-stop.

• When connecting the external quick-stop cabling, it is obligatory to follow the circuit diagram included in the delivery. The connection is made at the terminals.

• If no external quick-stop is installed, the terminals must be bridged according to the circuit diagram.

Routing of the quick-stop cableThe cable entry is the floor of the cabinet.

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Quick-stop function for several Sunny Centrals in one plant

If several Sunny Centrals are in operation in one plant, they must all be switched off when the quick-stop button is pressed on one inverter (creation of a quick-stop stop string). To achieve this, the quick-stop buttons of all Sunny Centrals are switched in series. The necessary 24 V supply voltage for the quick-stop string can be tapped internally by up to two Sunny Centrals installed in one station. If more than two Sunny Centrals are installed in one station or the distance between the two Sunny Centrals is greater than 5 m, the voltage supply must be provided externally.

Damage to the Sunny Central due to missing quick-stop function.• In plants with more than one inverter, the quick-stop circuits of the installed devices must be

linked with each other and tested for correct functioning.• The quick-stop string may only be supplied with voltage from one Sunny Central.

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11 Connection of the Communication Devices11.1 Structure of a Plant NetworkBefore you can connect the inverter to a computer via the service interface or the Internet, the SC-COM must be set up in the plant network.

Figure 18: Basic structure of large-scale plant networks

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11.2 Position of the communication ports

Figure 19: Position of the communication ports

Position DescriptionA Splice box*

* Optional

B Network terminal RJ45 socket and surge arrester

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11.3 Building a Plant Network with Copper CablesYou can integrate the SC-COM into the plant network using a copper cable. If you integrate the SC-COM permanently into a network with Internet access, it will be able to transmit plant data to Sunny Portal automatically.Requirement for the communication cable: Stripped, shielded twisted pair cable of category 5 (CAT 5) or higher.

• Plug the communication cable into the RJ45 socket in the connection cabinet.

11.4 Building a Plant network with Optical FibersDepending on the order option, you can integrate the SC-COM into the plant network using optical fibers. If you integrate the SC-COM permanently into a network with Internet access, it will be able to transmit the plant data to Sunny Portal automatically.The optical fiber is connected in the splice box. The splice box is equipped with an SC-P plug. You can connect the optical fiber to the SC-P plug in two ways:

• Connection of optical fiber using SC connector• Connection of optical fiber via pigtail

Connection of optical fiber using SC connector1. Mount SC connector on optical fiber.2. Plug the SC connector into the SC-P plug in the splice box.

Connection of optical fiber via pigtailRequirement for the pigtail: The cable is equipped with a 50 μm multi-mode fiber. The cable has an SC connector.

1. Splice the optical fiber with the pigtail in the splice box.2. Plug SC connector into the SC-P plug in the splice box.

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12 Commissioning12.1 Commissioning the Inverter

1. Check the cabling on the inverter (see section 12.2). 2. Commission the DC sub-distribution, e.g. Sunny String-Monitor

(see DC sub-distribution documentation).3. Commission the DC main distribution, e.g. Sunny Main Box

(see DC main distribution documentation).4. Check the DC voltages (see section 12.3.1).5. Insert fuses or disconnecting blades (see section 12.5).

7. Check the AC grid voltage (see section 12.3.2).8. Check the AC self-consumption voltage (see section 12.3.3).9. Switch on the voltage supply (see section 12.6).

The electronic components of the inverter switch on. The fans switch on and start taking air in through the air intake vents. The fans have not come on?

• Contact the SMA Serviceline.

Danger of fire if the connection is faulty.• Switch off all switch elements before the test:

– Switch the inverter to Stop.– Pull out the fuses.– Switch off the internal main switches and the miniature circuit-breaker.

Warranty or Guarantee ClaimsWarranty or guarantee claims can only be made valid if the initial start-up was carried out by SMA Solar Technology AG or if the fully completed and signed "Commissioning Report for Sunny Central Plants" is completed and available at SMA Solar Technology AG.

6. Only a duly authorized person trained in electrical safety can connect the AC voltage of the medium-voltage transformer.Switch on the AC voltage of the medium-voltage transformer.

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10. Switch the AC switch on.

11. Mount the panels (see section 12.4).12. Close the doors.13. Providing there is no error showing on the indicator lights or the display, switch the inverter on

(see section 12.7). The DC switch switches on with an audible click. Under conditions of sufficient irradiation, the inverter starts feeding into the grid. Are the display or indicator lamps showing an fault?

• Follow the operating manual for troubleshooting.

12.2 Checking the Cabling on the Inverter1. Ensure that all connections are executed in accordance with the circuit diagram. 2. Ensure that all AC, DC and PE connections are securely in place. 3. Ensure that equipotential bonding of the inverter to the installation site has been carried out. 4. Ensure that all connections in the connection cabinet are securely in place.

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12.3 Checking the Inverter Voltage

12.3.1 Checking the DC Voltages

1. Measure the DC voltage for each input and record in the Commissioning Report. To do this, use the DC+ and DC— terminal lugs in the connection area as measuring points.

2. Compare the DC voltages. The voltages are approximately the same and do not exceed the maximum DC voltage of

the inverter. The voltages deviate from each other and exceed the maximum DC voltage of the inverter.

• Ensure that the cabling has been executed in accordance with the circuit diagram.3. Check that the polarity of each input is correct. 4. Measure the DC voltage for each plus pole to ground and record in the Commissioning Report.

To do this, use the DC+ terminal lugs and PE connection busbar as measuring points. There is a measurable voltage drop. There is no measurable voltage drop?

A ground fault has occurred.• Eliminate the ground fault.

Danger of electric arcs if the measuring device is not properly connected. • Ensure that the measuring device is connected correctly.• Select the appropriate measuring range.

Damage to the inverter due to excessive DC voltages.The DC voltage of the PV array must not exceed the maximum voltage of the inverter.

• VPV = 1 000 V / 1 100 V

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12.3.2 Checking the AC Grid Voltage1. Measure the rotating magnetic field at the the AC terminal lugs using a rotating-field instrument.

The detected rotating magnetic field is right-rotating. Is the detected rotating magnetic field left-rotating?

2 line conductors are incorrectly connected.• Swap over the connections of the two of the three line conductors.

2. Measure the AC voltage at the AC terminal lugs between the following terminals and record in the Commissioning Report:– L1 - L2– L1 - L3– L2 - L3– L1 - PE– L2 - PE– L3 - PE AC voltage is approximately the same as the nominal voltage of the inverter. Does the AC voltage strongly deviate from the nominal voltage of the inverter?

• Have the transmission ratio of the medium-voltage transformer adjusted by an authorized person.

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12.3.3 Checking the External Voltage Supply1. Using a rotating-field instrument, measure the rotating magnetic field at the miniature circuit-

breaker of the external voltage supply. To do this, use the measuring points on the miniature circuit-breaker of the external voltage supply. The detected rotating magnetic field is right-rotating. Is the detected rotating magnetic field left-rotating?

2 line conductors are incorrectly connected.• Swap over the connections of the two of the three line conductors and repeat the

measurement.2. Measure the AC voltages at the miniature circuit-breaker of the external voltage supply between

the following terminals and record in the Commissioning Report: To do this, use the measuring points on the miniature circuit-breaker of the external voltage supply.– L1 - L2– L1 - L3– L2 - L3– L1 - N– L2 - N– L3 - N– L1 - PE– L2 - PE– L3 - PE– N - PE

The voltage between the line conductors is within the range of 360 V ... 440 V. The voltage between line conductor and neutral conductor or PE conductor is within the range of 207 V … 243 V. The voltage between PE conductor and neutral conductor is 0 V.

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12.4 Mounting the Panels

1. Fix all cables to the cable anchoring rail using cable ties.2. Fasten the PE cables to the panels of the connection cabinet.3. Check that the PE cables are securely fixed.4. Screw on the Plexiglas cover over the AC terminal lugs.5. Screw on the panels.

12.5 Inserting Fuses or Disconnecting Blades1. If you are not using an SMB connection kit, insert fuses. To do this, use a LV/HRC fuse handle.2. If you are using an SMB connection kit, insert

disconnecting blades. To do this, use a LV/HRC fuse handle.

3. Screw the Plexiglas cover back on over the fuses.

Risk of death due to electric shock when live parts of the inverter are touched.• Do not touch live components in the central inverter.

HE

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12.6 Switching on the Voltage Supply1. Close the test and disconnect terminals.

2. Switch on the miniature circuit-breaker of the grid monitoring.

3. Switch on the miniature circuit-breaker of the external voltage supply.

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4. Check the 3 indicator lamps on the 3 printed circuit boards of the power units in the inverter cabinet. Indicator lights glow green. Are indicator lights not glowing green?

• Contact the SMA Serviceline.

12.7 Switching on the Inverter

Requirements: All electrical connections made on site are correctly executed and firmly in place. The entire electrical system including the PV plant has been tested by the plant installer in

accordance with IEC 60364-600 "Low-voltage electrical installations – Part 6: Verification". A test protocol of the tests performed in accordance with IEC 60364-600 is available. If a medium-voltage system is present, further tests have been performed. The ground resistance of the plant has been measured. All values measured are within the permissible range. The inverter doors are closed.

• Turn the key switch to Start. The DC switch switches on with an audible click. Under conditions of sufficient irradiation, the inverter starts feeding into the grid. Are the display or indicator lamps showing an fault?

• Follow the operating manual for troubleshooting.

Danger to life through electric shock in the event of improper use or unauthorized opening of the inverter.High voltages are present in the inverter during operation.

• Do not operate the inverter while the door is open.• Remove the keys from the door locks on the inverter station.• Keep the keys in a safe place.

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13 Decommissioning1. Set the key switch of the inverter to Stop.2. Dismantle the panels.3. Open the door of the connection cabinet.4. Switch off the power supply.

• Switch off the miniature circuit-breaker of the external voltage supply.• Switch off the miniature circuit-breaker of the grid monitoring.• Open the test and disconnect terminals.

6. Ensure that no voltage is present.7. Pull the communication cable out of the connection socket.8. Unscrew and remove the Plexiglas cover from the fuses.9. Remove the fuses or disconnecting blades out from fittings. Use an LV/HRC fuse handle to

do this.10. Screw the Plexiglas cover back on over the fuses.11. Decommission the DC main distribution (see DC main distribution documentation).12. Decommission the DC sub-distribution (see DC sub-distribution documentation).13. Disconnect the AC, DC and PE cabling in the inverter.14. Mount the panels.15. Close the doors of the connection cabinet.

5. Only a duly authorized person trained in electrical safety is allowed to disconnect the AC voltage of the medium-voltage transformer.

• Switch off the AC voltage of the medium-voltage transformer.

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14 Technical Data14.1 Sunny Central 500HEInput values

Output values

Power consumption

Dimensions and weight

MPP voltage range 430 VDC … 820 VDCMaximum DC voltage*

* Optional 1 100 V

1 000 VDCMaximum DC current 1 250 ADCNumber of DC inputs 9

Nominal AC power at 50°C 500 kVAContinuous AC power at 25°C 550 kVAMaximum AC current 1 176 AACNominal AC current 1 069 AACNominal AC voltage ± 10% 270 VACGrid frequency 50 Hz / 60 HzPower factor cos φ 0.9 overexcited … 0.9 underexcitedMaximum total harmonic factor < 3%

Self-consumption in operation < 1 500 WStandby consumption < 100 WExternal auxiliary supply voltage 3 x 230 V, 50 Hz / 60 Hz

Width x height x depth 2 404 mm x 2 093 mm x 937 mm*

* Without anchorage bracket in base, incl. spreader beam, depth incl. all attached components

Weight 1 670 kg

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Efficiency

Ambient conditions

14.2 Sunny Central 630HEInput values

Output values

Maximum efficiency 98.6%Euro-eta 98.4%CEC-eta 98.5%

Degree of protection*

* As per DIN EN 60529

IP 21Operating temperature range –20°C ... +50°CHumidity 15% … 95%Fresh air consumption 3 000 m³/hMaximum altitude above sea level, MSL 2 000 m

MPP voltage range 500 VDC … 820 VDCMaximum DC voltage*

* Optional 1 100 V

1 000 VDCMaximum DC current 1 350 ADCNumber of DC inputs 9

Nominal AC power at 50°C 630 kVAContinuous AC power at 25°C 700 kVAMaximum AC current 1 283 AACNominal AC current 1 155 AACNominal AC voltage ± 10% 315 VACGrid frequency 50 Hz / 60 HzPower factor cos φ 0.9 overexcited … 0.9 underexcitedMaximum total harmonic factor < 3%

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Power consumption

Dimensions and weight

Efficiency

Ambient conditions

14.3 Sunny Central 720HEInput values

Self-consumption in operation < 1 500 WStandby consumption < 100 WExternal auxiliary supply voltage 3 x 230 V, 50 Hz / 60 Hz

Width x height x depth 2 404 mm x 2 093 mm x 937 mm*

* Without anchorage bracket in base, incl. spreader beam, depth incl. all attached components

Weight 1 670 kg

Maximum efficiency 98.7%Euro-eta 98.5%CEC-eta 98.5%

Degree of protection*

* As per DIN EN 60529

IP 21Operating temperature range –20°C ... +50°CHumidity 15% … 95%Fresh air consumption 3 000 m³/hMaximum altitude above sea level, MSL 2 000 m

MPP voltage range 525 VDC … 820 VDCMaximum DC voltage*

* Optional 1 100 V

1 000 VDCMaximum DC current 1 400 ADCNumber of DC inputs 9

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Output values

Power consumption

Dimensions and weight

Efficiency

Ambient conditions

Nominal AC power at 50°C 720 kVAContinuous AC power at 25°C 792 kVAMaximum AC current 1 411 AACNominal AC current 1 283 AACNominal AC voltage ± 10% 324 VACGrid frequency 50 Hz / 60 HzPower factor cos φ 0.9 overexcited … 0.9 underexcitedMaximum total harmonic factor < 3%

Self-consumption in operation < 1 500 WStandby consumption < 100 WExternal auxiliary supply voltage 3 x 230 V, 50 Hz / 60 Hz

Width x height x depth 2 404 mm x 2 093 mm x 937 mm*

* Without anchorage bracket in base, incl. spreader beam, depth incl. all attached components

Weight 1 670 kg

Maximum efficiency 98.6%Euro-eta 98.4%CEC-eta 98.5%

Degree of protection*

* As per DIN EN 60529

IP 21Operating temperature range –20°C ... +50°CHumidity 15% … 95%Fresh air consumption 3 000 m³/hMaximum altitude above sea level, MSL 2 000 m

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14.4 Sunny Central 760HEInput values

Output values

Power consumption

Dimensions and weight

Efficiency

MPP voltage range 554 VDC … 820 VDCMaximum DC voltage*

* Optional 1 100 V

1 000 VDCMaximum DC current 1 400 ADCNumber of DC inputs 9

Nominal AC power at 50°C 760 kVAContinuous AC power at 25°C 836 kVAMaximum AC current 1 411 AACNominal AC current 1 283 AACNominal AC voltage ± 10% 342 VACGrid frequency 50 Hz / 60 HzPower factor cosφ 0.9 overexcited … 0.9 underexcitedMaximum total harmonic factor < 3%

Self-consumption in operation < 1 500 WStandby consumption < 100 WExternal auxiliary supply voltage 3 x 230 V, 50 Hz / 60 Hz

Width x height x depth 2 404 mm x 2 093 mm x 937 mm*

* Without anchorage bracket in base, incl. spreader beam, depth incl. all attached components

Weight 1 670 kg

Maximum efficiency 98.6%Euro-eta 98.4%CEC-eta 98.5%

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Ambient conditions

14.5 Sunny Central 800HEInput values

Output values

Degree of protection*

* As per DIN EN 60529

IP 21Operating temperature range –20°C ... +50°CHumidity 15% … 95%Fresh air consumption 3 000 m³/hMaximum altitude above sea level, MSL 2 000 m

MPP voltage range 583 VDC … 820 VDCMaximum DC voltage*

* Optional 1 100 V

1 000 VDCMaximum DC current 1 400 ADCNumber of DC inputs 9

Nominal AC power at 50°C 800 kVAContinuous AC power at 25°C 880 kVAMaximum AC current 1 411 AACNominal AC current 1 283 AACNominal AC voltage ± 10%*

* Thin-film PV modules are subject to a natural aging process. This reduces their performance capacity. The Sunny Central 800HE has the option of adjusting the nominal AC voltage and power to the degradation of the PV modules. You will find further information on this in the inverter user manual.

360 VACGrid frequency 50 Hz / 60 HzPower factor cos φ 0.9 overexcited … 0.9 underexcitedMaximum total harmonic factor < 3%

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Power consumption

Dimensions and weight

Efficiency

Ambient conditions

Self-consumption in operation < 1 500 WStandby consumption < 100 WExternal auxiliary supply voltage 3 x 230 V, 50 Hz / 60 Hz

Width x height x depth 2 404 mm x 2 092.5 mm x 936.5 mm*

* Without anchorage bracket in base, incl. crane cross-beam, depth incl. all attached components

Weight 1 670 kg

Maximum efficiency 98.6%Euro-eta 98.4%CEC-eta 98.5%

Degree of protection*

* As per DIN EN 60529

IP 21Operating temperature range –20°C ... +50°CHumidity 15% … 95%Fresh air consumption 3 000 m³/hMaximum altitude above sea level, MSL 2 000 m

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15 ContactIf you have technical problems concerning our products, contact the SMA Serviceline. We need the following information in order to provide you with the necessary assistance:

• Inverter type• Inverter serial number• Type and number of PV modules connected• Type of communication• Display information of the inverter• Error or warning number displayed on the inverter

SMA Solar Technology AGSonnenallee 1D-34266 Niestetalwww.SMA.de

SMA ServicelineTel. + 49 561 9522 299Fax: + 49 561 9522 3299E-mail: SunnyCentral.Service@SMA.de

SMA Solar Technology AG Legal Restrictions

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The information contained in this document is the property of SMA Solar Technology AG. Publishing its content, either partially or in full, requires the written permission of SMA Solar Technology AG. Any internal company copying of the document for the purposes of evaluating the product or its correct implementation is allowed and does not require permission.

Exclusion of liabilityThe general terms and conditions of delivery of SMA Solar Technology AG shall apply.The content of these documents is continually checked and amended, where necessary. However, discrepancies cannot be excluded. No guarantee is made for the completeness of these documents. The latest version is available online at www.SMA.de or from the usual sales channels.Guarantee or liability claims for damages of any kind are excluded if they are caused by one or more of the following: • Damages during transportation• Improper or inappropriate use of the product• Operating the product in an unintended environment• Operating the product whilst ignoring relevant, statutory safety regulations in the deployment location• Ignoring safety warnings and instructions contained in all documents relevant to the product• Operating the product under incorrect safety or protection conditions• Altering the product or supplied software without authority• The product malfunctions due to operating attached or neighboring devices beyond statutory limit values• In case of unforeseen calamity or force majeureThe use of supplied software produced by SMA Solar Technology AG is subject to the following conditions:• SMA Solar Technology AG rejects any liability for direct or indirect damages arising from the use of software developed by

SMA Solar Technology AG. This also applies to the provision or non-provision of support activities.• Supplied software not developed by SMA Solar Technology AG is subject to the respective licensing and liability agreements

of the manufacturer.

SMA Factory WarrantyThe current guarantee conditions come enclosed with your device. These are also available online at www.SMA.de and can be downloaded or are available on paper from the usual sales channels if required.

TrademarksAll trademarks are recognized even if these are not marked separately. Missing designations do not mean that a product or brand is not a registered trademark.The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by SMA Solar Technology AG is under license.SMA Solar Technology AGSonnenallee 134266 NiestetalGermanyTel. +49 561 9522-0Fax +49 561 9522-100www.SMA.deE-Mail: info@SMA.de© 2004 to 2011 SMA Solar Technology AG. All rights reserved