This 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 Group
This 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 Information
You 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:
•SunnyCentralxxxHE-11 installation manual
• technical information on the Sunny Central
Installation GuideUkonstanter-IEN1036105
1Notes on this ManualSMA Solar Technology AG
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Symbols Used
The following types of safety notes and general information are used in this manual:
"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.
Information
Information provides tips that are valuable for the optimal installation and operation of your
product.
☑ This symbol indicates the result of an action.
✖ This symbol indicates a possible error.
6Ukonstanter-IEN103610Installation Guide
SMA Solar Technology AG2Safety
A
BC
S
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SUNNY CENTRAL 630HE
2Safety
2.1 Appropriate Usage
The 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 SunnyCentral.
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.
Figure1:Principle of the voltage stabilizer
PositionDescription
APower distribution grid
BVoltage stabilizer
CSunny Central
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.
Installation GuideUkonstanter-IEN1036107
2SafetySMA Solar Technology AG
2.2 Safety Instructions
Following Handling Instructions
High 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 Device
Work 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 Stabilizer
In 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 Connection
Also connect the grounding bridge when replacing the voltage stabilizer.
Warning Signs
Warning signs must be easily readable at all times and must be replaced in the event of
damage.
Storing the Documentation
Keep this documentation within close reach of the voltage stabilizer. It must be accessible to
service and maintenance personnel at all times.
8Ukonstanter-IEN103610Installation Guide
SMA Solar Technology AG2Safety
2.3 Personnel
All 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.
Installation GuideUkonstanter-IEN1036109
3DeliverySMA Solar Technology AG
3Delivery
3.1 Check for Transport Damage
Despite 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
Figure2:Components of the supply
PositionDescription
AVoltage stabilizer
10Ukonstanter-IEN103610Installation Guide
SMA Solar Technology AG4Mounting
100 mm
100 mm
500 mm
500 mm
4Mounting
4.1 Choosing an Installation Site
Requirements:
☐ 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:
Fi gur e3 :M ini mum cle ara nce s be twe en t he v olt age sta bil ize r an d non-electronic components in its close proximity.
Figure4:Minimum clearances between the voltage stabilizer and electronic components in its close proximity.
Installation GuideUkonstanter-IEN10361011
4MountingSMA Solar Technology AG
500 mm
SUNNY CENTRAL 630
SMA
Figure5:Minimum clearance to the Sunny Central
4.2 Mounting the Voltage Stabilizer
Additional Material:
☐ The screw anchors, screws and washers required for mounting must be provided by the
customer.
Figure6:Position of the mounting rail and measurements of the hole in the mounting rail
12Ukonstanter-IEN103610Installation Guide
SMA Solar Technology AG4Mounting
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.
Installation GuideUkonstanter-IEN10361013
5Electrical ConnectionSMA Solar Technology AG
5Electrical Connection
5.1 Overview of External Components for Internal Power Supply
Figure7:Connection area of the inverter and the voltage stabilizer
PositionDescription
AInverter
BLine circuit breaker (type D)
CStation sub-distribution
DVoltage stabilizer
E415 V circuit (unstable input voltage)
F230 V circuit (stabilized output voltage)
GTemperature monitoring
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 Breaker
In 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?
14Ukonstanter-IEN103610Installation Guide
SMA Solar Technology AG5Electrical Connection
/05*$&
• Replace it with a matching type D line circuit breaker.
5.3 Inserting the Cables
Required cables:
☐2x1.5mm2 cable for temperature monitoring
☐3x4mm
☐2x4mm
☐1x4mm
Flashover along the surface of the cable insulation.
• Use separate cable channels for the 230 V circuit and the 415 V circuit in order to ensure
2
cable for the 230 V circuit, maximum cable length: 7 m
2
cable for the 415 V circuit
2
PE cable for the enclosure
sufficient insulation between the two circuits.
Figure8:Cable glands on the side
PositionDescription
ACable gland for temperature monitoring
BCable gland for 415 V circuit and the protective conductor cable
CCable gland for the 230 V circuit
Installation GuideUkonstanter-IEN10361015
5Electrical ConnectionSMA Solar Technology AG
/05*$&
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 Diagram
For all electrical connections, it is imperative that you use the provided Sunny Central circuit
diagram.
16Ukonstanter-IEN103610Installation Guide
SMA Solar Technology AG5Electrical Connection
Overview of the Connection Area in the Voltage Stabilizer
Figure9:
ObjectDescription
A415 V circuit
B230 V circuit
CTemperature monitoring
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:
M30.6 … 0.8 Nm
M41.5 … 1.8 Nm
M63.2 … 3.7 Nm
Procedure:
• Connect the protective conductor cable.
• Connect the temperature monitoring.
• Connect the 230 V circuit.
• Connect the 415 V circuit.
• Close the voltage stabilizer.
Installation GuideUkonstanter-IEN10361017
5Electrical ConnectionSMA Solar Technology AG
U
415
u
u
u
230
230
230
1
2
3
4
u
u
230
230
230
1
2
3
4
u
230
230
1
2
3
4
Connecting the Protective Conductor Cable
1. 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 subdistribution outside of the voltage stabilizer.
Connecting the Temperature Monitoring
1. Strip the cable insulation.
2. Connect the cables to the terminals. Use wire
sleeves for this.
3. Tighten the cable screw connections.
18Ukonstanter-IEN103610Installation Guide
SMA Solar Technology AG5Electrical Connection
U
415
u
u
u
230
230
230
1
2
3
4
U
415
u
u
u
230
230
230
U
415
u
u
u
230
230
230
1
2
3
4
U
415
u
Connecting the 230 V Circuit
1. 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.
3. Tighten the cable screw connections.
Connecting the 415 V Circuit
1. Strip the cable insulation.
2. Connect the cables to the terminals. Use wire
sleeves for this.
3. Tighten the cable screw connections.
Closing the Voltage Stabilizer
1. Put on the cover and tighten the screws.
Installation GuideUkonstanter-IEN10361019
5Electrical ConnectionSMA Solar Technology AG
5
4
3
2
1
2
1
A
C
B
Z120-X120
Z121-X121
5.5 Connecting the Cables in the Sunny Central
Circuit Diagram
For 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.
Overview of the Connection Area in the Sunny Central
Figure10:Connection terminal strip in the Sunny Central, examples shown here are for options 2/0 and 5/5
ObjectDescription
ATemperature monitoring
B230 V circuit
C415 V circuit
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:
M30.6 … 0.8 Nm
M41.5 … 1.8 Nm
M63.2 … 3.7 Nm
20Ukonstanter-IEN103610Installation Guide
SMA Solar Technology AG5Electrical Connection
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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 Monitoring
1. 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.
5. Tighten the cable screw connections.
Installation GuideUkonstanter-IEN10361021
5Electrical ConnectionSMA Solar Technology AG
S
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Connecting the 230 V Circuit
1. 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 Circuit
1. 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.
22Ukonstanter-IEN103610Installation Guide
SMA Solar Technology AG6Commissioning
6Commissioning
Sunny Central Installation Manual
Follow all instructions in the Sunny Central installation manual.
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.
Installation GuideUkonstanter-IEN10361023
7Maintenance and ServiceSMA Solar Technology AG
7Maintenance and Service
Maintenance Intervals
Observe the information in the Sunny Central maintenance guide. The maintenance guide
describes all relevant safety notes and maintenance intervals.
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.
24Ukonstanter-IEN103610Installation Guide
SMA Solar Technology AG8Technical Data
8Technical Data
Electrical Data
Maximum rated output powerP
Nominal input voltageU
Input voltage range of the nominal input
nom
AC
U
AC
5kVA
415 V
−20%…+15%
voltage
Output voltageU
Output voltage range of the nominal
AC
U
AC
230 V
−10%…+10%
output voltage
Mechanical Data
Width x height x depth740 mm x 620 mm x 550 mm
Weight100 kg
Ambient Conditions
Permissible ambient temperature for installation
at altitudes of up to 1 000 m
Permissible ambient temperature for installation
at altitudes of up to 2 000 m
Maximum altitude above sea level2 000 m
Degree of protectionIP20
Insulation classta55/F
−20°C…+50°C
−20°C…+40°C
Installation GuideUkonstanter-IEN10361025
9ContactSMA Solar Technology AG
9Contact
If you have technical problems concerning our products, contact the SMA Serviceline. We need the
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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.
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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 majeure
The use of supplied software produced by SMA Solar Technology AG is subject to the following conditions:
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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
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