Accessories for Central Inverter VOLTAGE...

Ukonstanter-IEN103610 | 98-4042110 | Version 1.0 EN

Accessories for Central InverterVOLTAGE STABILIZERInstallation Guide

SMA Solar Technology AG Table of Contents

Installation Guide Ukonstanter-IEN103610 3

Table of Contents1 Notes on this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.1 Appropriate Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.2 Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.3 Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 Delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.1 Check for Transport Damage . . . . . . . . . . . . . . . . . . . . . . . . . . 103.2 Scope of Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114.1 Choosing an Installation Site . . . . . . . . . . . . . . . . . . . . . . . . . . 114.2 Mounting the Voltage Stabilizer . . . . . . . . . . . . . . . . . . . . . . . . 125 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145.1 Overview of External Components for Internal Power Supply . 145.2 Line Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145.3 Inserting the Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155.4 Connecting the Cables Inside the Voltage Stabilizer . . . . . . . . 165.5 Connecting the Cables in the Sunny Central . . . . . . . . . . . . . . 206 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237 Maintenance and Service . . . . . . . . . . . . . . . . . . . . . . . . . 248 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table of Contents SMA Solar Technology AG

4 Ukonstanter-IEN103610 Installation Guide

SMA Solar Technology AG 1 Notes on this Manual


1 Notes on this ManualArea of ValidityThis manual is valid for the voltage stabilizer.This manual supplements the installation manual of the following inverters:

• Sunny Central 400HE-11 (SC 400HE-11)• Sunny Central 500HE-11 (SC 500HE-11)• Sunny Central 630HE-11 (SC 630HE-11)

These inverter types will be referred to as "Sunny Central" in the following.Combining the voltage stabilizer with other inverter types is not possible and is explicitly not recommended.

Target GroupThis guide is for electrically skilled persons. A qualified electrically skilled person is conversant with the practices of installing electrical systems as well as the dangers and risks involved.

Additional InformationYou can find further information on special subjects in the download area at www.SMA.de/en.There are many items available for download including the following information:

• Sunny Central xxxHE-11 installation manual• technical information on the Sunny Central

1 Notes on this Manual SMA Solar Technology AG


Symbols UsedThe following types of safety notes and general information are used in this manual:

☑ This symbol indicates the result of an action.✖ This symbol indicates a possible error.

"DANGER" indicates a hazardous situation which, if not avoided, will result in death or serious injury.

"WARNING" indicates a hazardous situation which, if not avoided, could result in death or serious injury.

"CAUTION" indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

"NOTICE" indicates a situation that can result in property damage, if not avoided.

InformationInformation provides tips that are valuable for the optimal installation and operation of your product.

SMA Solar Technology AG 2 Safety


2 Safety2.1 Appropriate UsageThe voltage stabilizer connects the Sunny Central with the public power distribution grid in order to secure the internal power supply of the inverter. The voltage stabilizer reduces fluctuating grid voltages in order to ensure a constant power supply to the Sunny Central.The voltage stabilizer may only be used with a specially adapted Sunny Central xxxHE-11 device. If a voltage stabilizer is installed later as an upgrade, SMA Solar Technology AG must be contacted about the modification of the inverter.

Figure 1: Principle of the voltage stabilizer

Any other usage or installation of components and modifications than described in the usage regulations jeopardize the operational safety of the device and void all warranty claims as well as the operation permission.

Position DescriptionA Power distribution gridB Voltage stabilizerC Sunny Central

A B C

SMA

SUNNY CENTRAL 630HE

2 Safety SMA Solar Technology AG


2.2 Safety InstructionsFollowing Handling InstructionsHigh voltages are present in the voltage stabilizer. Failure to follow this manual, the operating instructions and the safety notes may lead to severe injury from electric shock. Only perform work as described in this manual. Observe all safety notes.

Disconnecting the DeviceWork on the inverter is only allowed if the power is disconnected and in compliance with the guidelines that apply at the installation location.

• Disconnecting the device:– grid voltage

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

Error-Free Operation of the Voltage StabilizerIn case of a ground fault, assume that grounded plant components are still live. Ensure there is no voltage present before touching.The operation of a damaged voltage stabilizer can lead to serious injuries through electric shock. Operate the voltage stabilizer only if it is in a technically proper and operationally safe status. Operate the voltage stabilizer only if there is no visible damage and check regularly for visible damage. Ensure that all external safety equipment is freely accessible at all times and is checked for proper functioning at least once a year.

Protective Conductor ConnectionAlso connect the grounding bridge when replacing the voltage stabilizer.

Warning SignsWarning signs must be easily readable at all times and must be replaced in the event of damage.

Storing the DocumentationKeep this documentation within close reach of the voltage stabilizer. It must be accessible to service and maintenance personnel at all times.

SMA Solar Technology AG 2 Safety


2.3 PersonnelAll work on the voltage stabilizer may only be carried out by qualified technical personnel. Qualified means that the personnel has the relevant training for the tasks.The personnel must be familiar with the contents of this guide and the Sunny Central manual in order to commission and operate the voltage stabilizer. Especially the safety notes must be observed.

3 Delivery SMA Solar Technology AG


3 Delivery3.1 Check for Transport DamageDespite the robust packaging, damage can occur during shipping and transport. Check the voltage stabilizer visually before installation. Should you detect any external defects, contact your supplier.

3.2 Scope of Supply

Figure 2: Components of the supply

Position DescriptionA Voltage stabilizer

SMA Solar Technology AG 4 Mounting


4 Mounting4.1 Choosing an Installation SiteRequirements:☐ Installation site is located inside a closed building.☐ The foundations must be level and solid.☐ The installation site is not in close proximity to a source of heat.☐ Minimum clearances have been observed.

Minimum Clearances:

Figure 3: Minimum clearances between the voltage stabilizer and non-electronic components in its close proximity.

Figure 4: Minimum clearances between the voltage stabilizer and electronic components in its close proximity.

100 mm1

00

mm

500 mm

500 mm

4 Mounting SMA Solar Technology AG


Figure 5: Minimum clearance to the Sunny Central

4.2 Mounting the Voltage StabilizerAdditional Material:☐ The screw anchors, screws and washers required for mounting must be provided by the

customer.

Figure 6: Position of the mounting rail and measurements of the hole in the mounting rail

500 mm

SUNNY CENTRAL 630SMA

SMA Solar Technology AG 4 Mounting


1. Mark the position of the drill holes.2. Drill the holes and insert suitable screw anchors.3. Attach the voltage stabilizer to the floor using appropriate screws and washers.4. Check that the voltage stabilizer is securely in place.

5 Electrical Connection SMA Solar Technology AG


5 Electrical Connection5.1 Overview of External Components for Internal Power Supply

Figure 7: Connection area of the inverter and the voltage stabilizer

The temperature circuit monitors the operating temperature of the voltage stabilizer. If the operating temperature of the voltage stabilizer exceeds 50 °C, the Sunny Central will shut down since the voltage stabilizer will no longer be able to ensure a stable power supply.

5.2 Line Circuit BreakerIn order to operate the voltage stabilizer, it is necessary to secure the power supply of the Sunny Central with a 16 A type D line circuit breaker. The line circuit breaker is located in the station sub-distribution.

• Check which line circuit breaker is installed.☑ A 16 A type D line circuit breaker is installed.✖ There is no 16 A type D line circuit breaker installed?

Position DescriptionA InverterB Line circuit breaker (type D)C Station sub-distributionD Voltage stabilizerE 415 V circuit (unstable input voltage)F 230 V circuit (stabilized output voltage)G Temperature monitoring

SMA Solar Technology AG 5 Electrical Connection


• Replace it with a matching type D line circuit breaker.

5.3 Inserting the CablesRequired cables:☐ 2 x 1.5 mm2 cable for temperature monitoring☐ 3 x 4 mm2 cable for the 230 V circuit, maximum cable length: 7 m☐ 2 x 4 mm2 cable for the 415 V circuit☐ 1 x 4 mm2 PE cable for the enclosure

Figure 8: Cable glands on the side

Flashover along the surface of the cable insulation.• Use separate cable channels for the 230 V circuit and the 415 V circuit in order to ensure

sufficient insulation between the two circuits.

Position DescriptionA Cable gland for temperature monitoringB Cable gland for 415 V circuit and the protective conductor cableC Cable gland for the 230 V circuit



1. Unscrew the screws on the cover and remove the cover.

2. Insert the protective conductor cable through the cable gland.3. Insert the temperature monitoring cables through the cable gland.4. Insert the cable of the 415 V circuit through the cable gland.5. Insert the cable of the 230 V circuit through the cable gland.6. Attach the cable inside the voltage stabilizer in such a manner as to ensure proper strain relief.

5.4 Connecting the Cables Inside the Voltage Stabilizer

There will be no proper protection if the protective conductor cable is connected incorrectly.Check if the grounding bridge matches the circuit diagram.

Circuit DiagramFor all electrical connections, it is imperative that you use the provided Sunny Central circuit diagram.



Overview of the Connection Area in the Voltage Stabilizer

Figure 9:

Connection to Terminals• All connection terminals that are not being used must be screwed tightly.• Strip 5 mm from the cable insulation.• Observe the following torques when connecting the cables to the terminals:

Procedure:• Connect the protective conductor cable.• Connect the temperature monitoring.• Connect the 230 V circuit.• Connect the 415 V circuit.• Close the voltage stabilizer.

Object DescriptionA 415 V circuitB 230 V circuitC Temperature monitoring

M3 0.6 … 0.8 NmM4 1.5 … 1.8 NmM6 3.2 … 3.7 Nm



Connecting the Protective Conductor Cable1. Check if the protective conductor bridge is

available at the terminal strip according to the circuit diagram.☑ Protective conductor bridge is available.✖ Protective conductor bridge is not available?

• Establish protective conductor bridge according to the circuit diagram.

2. Strip the cable insulation.3. Attach a terminal lug to the cable.4. Connect the protective conductor cable to the

protective conductor grounding point in the voltage stabilizer.

5. Connect the protective conductor cable to the protective conductor rail in the station sub-distribution outside of the voltage stabilizer.

Connecting the Temperature Monitoring1. Strip the cable insulation.2. Connect the cables to the terminals. Use wire

sleeves for this.

3. Tighten the cable screw connections.

U

41

5

u

u

u

23

023

0

23

0

1 2 3 4

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23

023

0

23

0

1 2 3 4u

23

0

23

0

1 2 3 4



Connecting the 230 V Circuit1. Strip the cable insulation.2. Connect the cables to the terminals. Use wire

sleeves for this. Also connect the protective conductor cable according to the circuit diagram.


Connecting the 415 V Circuit1. Strip the cable insulation.2. Connect the cables to the terminals. Use wire

sleeves for this.


Closing the Voltage Stabilizer1. Put on the cover and tighten the screws.

U

41

5

u

u

u

23

023

0

23

0

1 2 3 4

U

41

5

u

u

u

23

023

0

23

0

U

41

5

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u

u

23

023

0

23

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1 2 3 4

U

41

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5.5 Connecting the Cables in the Sunny Central

Overview of the Connection Area in the Sunny Central

Figure 10: Connection terminal strip in the Sunny Central, examples shown here are for options 2/0 and 5/5

Connection to Terminals• All connection terminals that are not being used must be screwed tightly.• Strip 5 mm from the cable insulation.• Observe the following torques when connecting the cables to the terminals:

Circuit DiagramFor all electrical connections, it is imperative that you use the provided Sunny Central circuit diagram. The exact position of the terminal strip can be determined with the help of the reference designation.

Object DescriptionA Temperature monitoringB 230 V circuitC 415 V circuit

M3 0.6 … 0.8 NmM4 1.5 … 1.8 NmM6 3.2 … 3.7 Nm

5432121

A CB

Z1

20

-X1

20

Z1

21

-X1

21



Procedure:• Insert the cables into the inverter (see inverter documentation).• Connect the temperature monitoring.• Connect the 230 V circuit.• Connect the 415 V circuit.

Connecting the Temperature Monitoring1. Strip the cable insulation.2. Insert a screwdriver into the square-shaped

opening next to the terminal and open the terminal lock by pressing it.

3. Connect the cables to the terminals. Use wire sleeves for this.

4. Pull the screwdriver out of the terminal.


SMA



Connecting the 230 V Circuit1. Strip the cable insulation.2. Insert a screwdriver into the square-shaped opening next the terminal and open the terminal lock

by pressing it.3. Connect the cables to the terminals. Use wire

sleeves for this.

4. Pull the screwdriver out of the terminal.5. Tighten the cable screw connections.

Connecting the 415 V Circuit1. Strip the cable insulation.2. Insert a screwdriver into the square-shaped opening next the terminal and open the terminal lock

by pressing it.3. Connect the cables to the terminals. Use wire

sleeves for this.

4. Pull the screwdriver out of the terminal.5. Tighten the cable screw connections.

SMA

SMA

SMA Solar Technology AG 6 Commissioning


6 Commissioning

Requirements for Commissioning☐ There is a protective conductor connection between the voltage stabilizer and the

Sunny Central.☐ All screws and cable glands are tight.☐ The line circuit breaker is working properly.

The voltage stabilizer is started up as soon as the Sunny Central is started up.

Sunny Central Installation ManualFollow all instructions in the Sunny Central installation manual.

7 Maintenance and Service SMA Solar Technology AG


7 Maintenance and Service

Maintenance Work:• Press the test button on the residual current device in the Sunny Central every 2 years.

This ensures that the residual current device is working properly.☑ The residual current device will trip and the indicator light on the service socket will go out.✖ The residual current device does not trip or the indicator light on the service socket does not

go out?• Replace the residual current device.

• Check that the connection cable is securely in place.• Check the voltage stabilizer for dirt every 6 months.• Always ensure that the vents are free of dirt or foreign objects.• Check if the fan is functioning correctly every 12 months.

Service Work:• Replace the capacitors after expiration of their service life. The service life of the capacitors is

limited to 100 000 hrs.

Maintenance IntervalsObserve the information in the Sunny Central maintenance guide. The maintenance guide describes all relevant safety notes and maintenance intervals.

SMA Solar Technology AG 8 Technical Data


8 Technical DataElectrical Data

Mechanical Data

Ambient Conditions

Maximum rated output power Pnom 5 kVANominal input voltage UAC 415 VInput voltage range of the nominal input voltage

UAC − 20 % … +15 %

Output voltage UAC 230 VOutput voltage range of the nominal output voltage

UAC − 10 % … +10 %

Width x height x depth 740 mm x 620 mm x 550 mmWeight 100 kg

Permissible ambient temperature for installation at altitudes of up to 1 000 m

− 20 °C … +50 °C

Permissible ambient temperature for installation at altitudes of up to 2 000 m

− 20 °C … +40 °C

Maximum altitude above sea level 2 000 mDegree of protection IP20Insulation class ta55/F

9 Contact SMA Solar Technology AG


9 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• serial number of inverter• type and number of PV modules connected• type of communication• display information of the inverter• error or warning number of the inverter

SMA Solar Technology AG Sonnenallee 134266 Niestetal, Germanywww.SMA.de

SMA ServicelineTel. +49 561 9522 299Fax +49 561 9522 3299 E‑Mail: [email protected]

SMA Solar Technology AG Legal Restrictions


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: [email protected]© 2004 to 2010 SMA Solar Technology AG. All rights reserved

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