TRANSFORMER COMPACT STATION 500SC-ZA…files.sma.de/dl/21738/TCS-ZA-IA-en-10.pdf · Installation Manual ... • Transformer Compact Station 500SC‑ZA ... Installation Manual TCS-ZA-IA-en-10

TCS-ZA-IA-en-10 | 98-40431110 | Version 1.0 ENGLISH

Installation ManualTRANSFORMER COMPACT STATION 500SC-ZA/630SC-ZA/800SC-ZA/900SC-ZA/1000SC-ZA/1250SC-ZA/1600SC-ZA/1800SC-ZA

Legal Provisions SMA Solar Technology AG

2 TCS-ZA-IA-en-10 Installation Manual

Legal ProvisionsThe 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.

SMA WarrantyYou can download the current warranty conditions from the Internet at www.SMA-Solar.com.

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SMA Solar Technology AG Sonnenallee 1 34266 Niestetal GermanyTel. +49 561 9522-0 Fax +49 561 9522-100 www.SMA.de E-mail: [email protected]© 2004 to 2013 SMA Solar Technology AG. All rights reserved

SMA Solar Technology AG Table of Contents

Installation Manual TCS-ZA-IA-en-10 3

Table of Contents1 Information on this Document. . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.2 Skills of Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.1 Plant Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.2 Transformer Compact Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.3 Type Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4 Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 Mounting location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Transport and Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

7.1 Set up Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187.2 Laying cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

7.2.1 Laying Cables between the Low-Voltage Switchgear and the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

7.2.2 Inserting the Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197.3 Grounding of the Transformer Compact Station . . . . . . . . . . . . . . . . 20

7.3.1 Connection Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207.3.2 Connecting the Grounding Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

7.4 Cable Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227.4.1 Connection area for the station sub-distribution board . . . . . . . . . . 227.4.2 Connecting Cables for Inverter's Internal Power Supply . . . . . . . . . 237.4.3 Connecting the Grounding Conductor. . . . . . . . . . . . . . . . . . . . . . . 237.4.4 Connecting Inverter to Output Terminal of Transformer Protection

Unit in Station Sub-Distribution Board . . . . . . . . . . . . . . . . . . . . . . . 247.4.5 Connecting the Internal Power Supply Cable for the

Transformer Compact Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247.5 Set Voltage on Internal Power Supply Transformer . . . . . . . . . . . . . . 25

Table of Contents SMA Solar Technology AG


8 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268.1 Safety during Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268.2 Commissioning the Transformer Compact Station . . . . . . . . . . . . . . . 278.3 Inspecting Cabling to the Transformer Compact Station . . . . . . . . . . 288.4 Examining Low AC Voltage in Low-Voltage Switchgear . . . . . . . . . . 298.5 Connecting the Internal Power Supply for the

Transformer Compact Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298.6 Connecting the Internal Power Supply for the Inverter . . . . . . . . . . . 29

9 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309.1 Transformer Compact Station 500SC . . . . . . . . . . . . . . . . . . . . . . . . 309.2 Transformer Compact Station 630SC . . . . . . . . . . . . . . . . . . . . . . . . 319.3 Transformer Compact Station 800SC . . . . . . . . . . . . . . . . . . . . . . . . 329.4 Transformer Compact Station 900SC . . . . . . . . . . . . . . . . . . . . . . . . 339.5 Transformer Compact Station 1000SC . . . . . . . . . . . . . . . . . . . . . . . 349.6 Transformer Compact Station 1250SC . . . . . . . . . . . . . . . . . . . . . . . 359.7 Transformer Compact Station 1600SC . . . . . . . . . . . . . . . . . . . . . . . 369.8 Transformer Compact Station 1800SC . . . . . . . . . . . . . . . . . . . . . . . 37

10 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

SMA Solar Technology AG 1 Information on this Document


1 Information on this DocumentValidityThis document is valid for the following device types:

• Transformer Compact Station 500SC‑ZA• Transformer Compact Station 630SC‑ZA• Transformer Compact Station 800SC‑ZA• Transformer Compact Station 900SC‑ZA• Transformer Compact Station 1000SC‑ZA• Transformer Compact Station 1250SC‑ZA• Transformer Compact Station 1600SC‑ZA• Transformer Compact Station 1800SC‑ZA

Target GroupThis document is intended for qualified persons. Only persons with the appropriate skills are allowed to perform the tasks described in this document (see Section 2.2 "Skills of Qualified Persons", page 7).

Additional InformationLinks to additional information can be found at www.SMA-Solar.com.

Title Document typeInstallation Requirements for the Various Station Concepts of the Transformer Compact Stations 500SC/630SC/800SC/900SC/1000SC/1250SC/1600SC/1800SC

Technical Information

1 Information on this Document SMA Solar Technology AG


Symbols

Nomenclature

Abbreviations

Symbol ExplanationIndicates a hazardous situation which, if not avoided, will result in death or serious injuryIndicates a hazardous situation which, if not avoided, can result in death or serious injuryIndicates a hazardous situation which, if not avoided, can result in minor or moderate injuryIndicates a situation which, if not avoided, can result in property damage

Information that is important for a specific topic or goal, but is not safety-relevant

☐ Indicates a requirement for meeting a specific goal☑ Desired result✖ A problem that could occur

Complete designation Designation in this documentTransformer Compact Stations 500SC-ZA/630SC-ZA/800SC-ZA/900SC-ZA/1000SC-ZA/1250SC-ZA/1600SC-ZA/1800SC-ZA

Transformer Compact Station

Sunny Central CP XT Sunny Central or inverter

Abbreviations Designation ExplanationAC Alternating Current ‒DC Direct Current ‒MSL Mean Sea Level ‒PE Protective Earth Protective conductorPV Photovoltaics ‒

SMA Solar Technology AG 2 Safety


2 Safety2.1 Intended UseThe Transformer Compact Station is a transformer unit that converts low voltage into medium voltage. Depending on the option ordered, the Transformer Compact Station contains one or two low-voltage switchgears plus a medium-voltage switchgear.Only CP XT inverters of the same power class must be connected to the Transformer Compact Station.The Transformer Compact Station is suitable for outdoor installation provided that the specified safety clearances are maintained. The Station complies with degree of protection IP43.For safety reasons, it is not permitted to modify the product or install components that are not explicitly recommended or distributed by SMA Solar Technology AG for this product.Use this product only in accordance with the enclosed documentation and with the local standards and directives. Any other application may cause personal injury or property damage.The enclosed documentation is an integral part of this product.

• Read and observe the documentation.• Keep the documentation in a convenient place for future reference.

2.2 Skills of Qualified PersonsThe tasks described in this document must be performed by qualified persons only. Qualified persons must have the following skills:

• Knowledge of how inverters work and are operated• Training in how to deal with the dangers and risks associated with installing and using electrical

devices and plants• Training in the installation and commissioning of electrical devices and plants• Knowledge of all applicable standards and directives• Knowledge of and adherence to this document and all safety precautions

2.3 Safety PrecautionsThis section contains safety precautions that must be observed at all times when working on or with the product. To prevent personal injury or property damage and to ensure long-term operation of the product, read this section carefully and follow all safety precautions at all times.

2 Safety SMA Solar Technology AG


Danger to life from electric shock due to live voltageHigh voltages are present in the Transformer Compact Station. Touching live components results in death or serious injury due to electric shock.

• When working on the Transformer Compact Station, always wear suitable personal protective equipment.

• Do not touch live components.• Follow the instructions precisely.• Observe all safety messages on the product and in the documentation.• Before any work is performed, always disconnect the following components from voltage

sources if live voltage is not absolutely necessary:– Low-voltage switchgear– Medium-voltage switchgear– External voltage supply

• Ensure that no disconnected components can be reconnected.• Before performing any work on the Transformer Compact Station, ensure that no voltage is

present in any of the components.• Ground and short-circuit the Transformer Compact Station.• Cover or shield any adjacent live components.

Danger to life from electric shock if the Transformer Compact Station is damagedOperating a damaged Transformer Compact Station can lead to hazardous situations that result in death or serious injuries due to electric shock.

• Operate the Transformer Compact Station only if it is technically safe and in good working order.

• Regularly check the Transformer Compact Station for visible damage.• Make sure that all external safety equipment is freely accessible at all times.• Make sure that all safety equipment is in good working order.• When working on the Transformer Compact Station, always wear suitable personal protective

equipment.

SMA Solar Technology AG 2 Safety


Risk of burns due to hot componentsSome components of the Transformer Compact Station can get very hot during operation. Touching these components can result in burn injuries.

• Observe the safety warnings on the components.• Use suitable tools when working on the device.• Wear gloves when working on the Transformer Compact Station.

3 Product Description SMA Solar Technology AG


3 Product Description3.1 Plant OverviewThe Transformer Compact Station is a transformer unit that converts low voltage into medium voltage. Depending on the option ordered, the Transformer Compact Station contains one or two low-voltage switchgears plus a medium-voltage switchgear.

Figure 1: Principle of a grid-tie PV plant with a Transformer Compact Station

CP XT inverters in the same power class are connected to the Transformer Compact Station. Inverters convert direct current to alternating current. The alternating current is then supplied to the transformer. The alternating current is transmitted from the transformer to the switchgear and fed into the utility grid.

Item DescriptionA PV modulesB Sunny String-Monitor C Sunny CentralD Transformer Compact StationE Utility grid

SMA Solar Technology AG 3 Product Description


3.2 Transformer Compact Station

Figure 2: Design of the Transformer Compact Station

Item Description ExplanationA Communit communication distributor* Is used to hold and cable all

communication components used in large PV plants with Sunny Central, Sunny Mini Central, or Sunny Tripower inverters.

B Station sub-distributionC Transformer for auxiliary power supply* Supplies power to the Transformer

Compact Station and the inverter. The supply voltage is 230 V/400 V (3/N/PE).

D Installation location for customer devicesE Disconnector for internal power supply

transformer*F Low-voltage switchgear Connects the Transformer Compact Station

to the inverters. The low-voltage switchgear can be used to disconnect the Transformer Compact Station from the inverters.

3 Product Description SMA Solar Technology AG


3.3 Type LabelThe type label is used to identify the Transformer Compact Station. The type labels are attached to the outside of the Transformer Compact Station, below the SMA labels. The following information is listed on the type label:

• Type designation• Serial number (Serial No.)• Fabrication version• Fabrication date

G Medium-voltage switchgear* The medium-voltage switchgear is used to disconnect the Transformer Compact Station from the medium-voltage grid.

H Medium-voltage transformer Converts low voltages into medium voltages.

* Optional

Item Description Explanation

SMA Solar Technology AG 4 Scope of Delivery


4 Scope of DeliveryCheck the scope of delivery for completeness and any visible external damage. Contact SMA Solar Technology AG if the delivery is incomplete or damaged.

Figure 3: Scope of Delivery

Item Number DescriptionA 1 Transformer Compact StationB 3/6* Busbar for the low-voltage switchgear**

** Mounted by SMA Service after transportation

C 18/36*

* Depending on whether one or two inverters are used

Screw**D 18/36* Nut**E 18/36* Washer**F 18/36* Spring lock washer**G 12/24* ÖLFLEX® TRAFO cables***

*** Optional

H 1 Operating leverI 1 Installation manual, circuit diagram, documentation

5 Mounting Location SMA Solar Technology AG


5 Mounting LocationAmbient Conditions

• The mounting location must be accessible at all times.• The mounting location must not be higher than 1,800 m above MSL.• All minimum clearances must be observed.• A safety clearance of 5,000 mm must be maintained from flammable objects.• All ambient conditions must be met (see Section 9 "Technical Data", page 30).

Dimensions of the Transformer Compact Station

Figure 4: Dimensions of the Transformer Compact Station

Minimum Clearances

Fire hazard due to overheating of a cableDiffering cable lengths lead to overheating of the cables. Excessive heat can result in cable fires. Death and serious injury due to fire can result.

• All line conductors from the inverter to the Transformer Compact Station must be of the same length.

• The cable length between the connection points must not exceed a maximum of 15 m.

SMA Solar Technology AG 5 Mounting Location


Figure 5: Minimum clearances for the Transformer Compact Station

Item DescriptionA InverterB Cable route between the inverter and the Transformer Compact StationC Transformer Compact Station

6 Transport and Mounting SMA Solar Technology AG


6 Transport and Mounting

Figure 6: Lifting holes for lifting equipment on the front and back

Requirement:☐ The foundation of the Transformer Compact Station has to be built.

Crush hazard due to the Transformer Compact Station tipping over if not transported properlyThe Transformer Compact Station may tip or fall as a result of being lifted or transported carelessly or too fast. The center of gravity of the Transformer Compact Station is not in the middle of the device.

• The means of transportation must be designed for a weight of 13 t.• Do not tip the Transformer Compact Station during transportation.• Transport the Transformer Compact Station as low to the ground as possible.• Always use all lifting holes when transporting the device.• Avoid sudden, jerky movements during transportation.

Damage to the Transformer Compact Station due to moisture penetration• Only transport and store the Transformer Compact Station with its doors closed.

Item DescriptionA Anchoring points for lifting equipment

SMA Solar Technology AG 6 Transport and Mounting


Procedure:1. Attach the lifting equipment to the anchoring points.

– Guide the bars of the lifting equipment through the holes for the lifting equipment.

– Attach the struts of the lifting equipment to the bars.

– Insert spacer bars between the struts above the Transformer Compact Station.

– Insert spacer bars between the struts on the sides the Transformer Compact Station.

– Use the shackles to hang metal chains through the corresponding holes on the upper ends of the lifting equipment.

– Hang all four metal chains in the crane hook.2. Slowly raise the lifting equipment until the chains are taut.3. Slowly lift the Transformer Compact Station.4. Transport the Transformer Compact Station.5. Set down the Transformer Compact Station in the

center of the foundation. Observe the foundation boundaries.

6. Remove the lifting equipment from the anchoring points.7. Attach the Transformer Compact Station to the foundation using screws.

7 Electrical Connection SMA Solar Technology AG


7 Electrical Connection7.1 Establishing Electrical Connection

7.2 Laying the Cables7.2.1 Laying the Cables between the Low-Voltage Switchgear and

the Inverter☐ The AC cables are three-phase cables.☐ Between the low-voltage switchgear and the inverter there are four separate cable routes for

the AC cables, e. g. cable channels. After building the foundation and positioning the Transformer Compact Station, you have to consider that holes have to be dug underneath the foundation for the cables to be laid to the cable entries.

☐ The spacing between the cable routes must be at least twice the diameter of an AC cable.

Procedure See1 Lay the cable from the low-voltage switchgear to the

inverter.Section 7.2.1

2 Lay the cable for the inverter power supply and for the connection to the transformer protection unit.

3 Insert the cables. Section 7.2.24 Ground the Transformer Compact Station. Section 7.35 Connect the cable for the internal power supply to

the inverter.Section 7.4.2

6 Connect the grounding conductor. Section 7.4.37 Connect the inverter to the output terminal of the

transformer protection unit in the station sub-distribution board.

Section 7.4.4

8 Connect the internal power supply cable to the Transformer Compact Station.

Section 7.4.5

9 Connect the cable for the low-voltage switchgear. Documentation for the low-voltage switchgear

10 Connect the cable for the medium-voltage switchgear.

Documentation for the medium-voltage switchgear

11 Close the cable entries. Documentation for the cable entries

SMA Solar Technology AG 7 Electrical Connection


Figure 7: Arrangement of AC cables with four cables per line conductor (example).

Procedure:• Lay the cables in accordance with the required configuration.

7.2.2 Inserting the Cables

Figure 8: Position of cable entries

Observe cable clearancesLay one L1, L2 and L3 line conductor in each cable route. Ensure that the distance between the cable bundles is at least double that of the diameter of a cable. This prevents the cables from heating up excessively. Swapping the line conductors L1 and L3 prevents current imbalances.

Item DescriptionA Enclosure openings for the low-voltage switchgearB Cable entries for cables for the following devices or components:

• Internal power supply for the inverter• Communit• Transformer protection• If power is supplied by an external source: internal power supply for the

Transformer Compact StationC Cable entries for the medium-voltage switchgear



Procedure:• Lay the cables into the Transformer Compact Station

– The cables that connect the medium-voltage switchgear to the point of common connection– The cables that connect the low-voltage switchgear to the inverters– The cables for the internal power supply of the inverter– The cables for the transformer protection unit– If power is supplied by an external source: the cable for the internal power supply of the

Transformer Compact Station

7.3 Grounding of the Transformer Compact Station7.3.1 Connection OverviewThe Transformer Compact Station is equipped at two points with grounding bolts which enable external grounding. The stainless steel grounding plates are each connected by a cable to the grounding busbar in the Transformer Compact Station.The external grounding must be executed by the customer on-site according to the grounding concept of the entire PV plant. Influencing factors are the conditions or conductivity of the soil, the lightning protection system and the type of ground electrode. The grounding devices can, for instance, be executed as grounding straps or grounding electrodes.

Figure 9: Grounding points of the Transformer Compact Station

Item DescriptionA Grounding bolt



Figure 10: Screw connection for the grounding bolts

7.3.2 Connecting the Grounding BoltsRequirements:

☐ Any required supplementary mounting material must be available.Additionally required mounting material (not included in the scope of delivery):

☐ Screws, M12☐ Spring washers, external diameter: 29 mm, internal diameter: 13.5 mm, thickness: 1.25 mm☐ Fender washers, external diameter: 32 mm, internal diameter: 13 mm☐ Nuts☐ Plant ground electrodes suitable for the grounding concept of the PV plant☐ Clean cloth☐ Ethanol cleaning agent☐ Non-woven abrasive☐ Suitable material for sealing the grounding pads (e.g. durable zinc paint)

Item DescriptionA Spring washerB Fender washerC NutD Grounding boltE Terminal lugF Transformer Compact Station



Procedure:1. Install the plant ground electrode in accordance with the applicable regulations.2. Ensure that the required grounding resistance is reached.3. If insulated cables are used, strip the insulation off the grounding cables.4. Fit the grounding cables with terminal lugs.5. Clean the contact surfaces with a clean cloth and ethanol cleaning agent.6. Clean the contact surfaces with the non-woven abrasive until they have a light metallic sheen.

Ensure that the coated contact surfaces are not damaged in the process.7. Remove metal dust with a clean cloth and do not touch the contact surfaces.8. Connect the grounding cables to the grounding bolts.9. Connect the grounding cables to the grounding electrodes.

10. Seal the grounding bolts and terminals.

7.4 Cable Connection7.4.1 Connection Area for the Station Sub-Distribution Board

Figure 11: Connection area for the station sub-distribution board

Grounding of the Transformer Compact StationGround the Transformer Compact Station in accordance with the applicable regulations.Two grounding connections are provided on the Transformer Compact Station. SMA Solar Technology AG recommends connecting both grounding bolts to the grounding electrode.



7.4.2 Connecting Cables for the Internal Power Supply of the Inverter

1. Connect the the internal power supply of the inverter in accordance with the circuit diagram.– Dismantle the cable.– Strip the insulation off the wires.– Connect the conductors.

2. If two inverters are used: connect the internal power supply for the second inverter in accordance with the circuit diagram.– Dismantle the cable.– Strip the insulation off the wires.– Connect the cables.

7.4.3 Connecting the Grounding ConductorAdditionally required mounting material (not included in the scope of delivery):

☐ Terminal lug☐ Screw, spring washer, fender washer, nut

Procedure:• Connect the grounding conductor in accordance with the circuit diagram:

– Strip the cable insulation.– Attach a terminal lug to the cable.– Connect the cable.

Item DescriptionA Terminals for internal power supplyB Terminals of the transformer protection unit for the Sunny CentralC Terminals for the Sunny CentralD Busbars for the grounding conductor



7.4.4 Connecting the Inverter to the Output Terminal of the Transformer Protection Unit in the Station Sub-Distribution Board

1. Connect the transformer protection unit of the inverter in accordance with the circuit diagram.– Dismantle the cable.– Strip insulation off the wires.– Connect the conductors.

2. If two inverters are used, connect the transformer protection unit for the second inverter in accordance with the circuit diagram.– Dismantle the cable.– Strip insulation off the wires.– Connect the conductors.

7.4.5 Connecting the Internal Power Supply Cable for the Transformer Compact Station

Depending on the options ordered, the Transformer Compact Station may contain an internal power supply transformer. If it does not contain an internal power supply transformer, the power will have to be supplied by an external source.Procedure:

• Connect the internal power supply to the Transformer Compact Station in accordance with the circuit diagram:– Dismantle the cable.– Strip insulation off the wires.– Connect the conductors.



7.5 Setting the Voltage on Internal Power Supply TransformerThe input voltage and the output voltage of the transformer for auxiliary power supply must match the output voltage of the inverters. To do this, adapt the primary and secondary sides of the internal power supply transformer to the inverter.

Figure 12: Position of connecting terminal plates

Requirement:☐ The busbars of the low-voltage switchgear have to be installed by SMA Service.

Procedure:1. Set the input voltage on the primary side. This adjusts the output voltage to the inverter's input

voltage (see circuit diagram for the Transformer Compact Station).2. Set the output voltage on the secondary side. This adjusts the output voltage to the inverter's

input voltage (see circuit diagram for the Transformer Compact Station).

Item DescriptionA Connecting terminal plate on the secondary sideB Connecting terminal plate on the primary side

8 Commissioning SMA Solar Technology AG


8 Commissioning8.1 Safety during Commissioning

Danger to life from electric shock due to live voltagesHigh voltages are present in the Transformer Compact Station. Touching live components results in death or serious injury due to electric shock.

• When working on the Transformer Compact Station, always wear suitable personal protective equipment.

• Do not touch live components.• Follow the instructions precisely.• Observe all safety messages on the product and in the documentation.• Before any work is performed, always disconnect the following components from voltage

sources if live voltage is not absolutely necessary:– Low-voltage switchgear– Medium-voltage switchgear– External voltage supply

• Ensure that no disconnected components can be reconnected.• Before performing any work on the Transformer Compact Station, ensure that no voltage is

present in any of the components.• Ground and short-circuit the Transformer Compact Station.• Cover or shield any adjacent live components.

Risk of fire due to faulty connection• Switch off all switching elements:

– Switch off the low-voltage switchgear (see the documentation for the low-voltage switchgear).

– Switch off the medium-voltage switchgear (see the documentation for the medium-voltage switchgear).

– Remove the fuses.– Open the circuit breaker.– Open the residual current device.

SMA Solar Technology AG 8 Commissioning


8.2 Commissioning the Transformer Compact Station

Figure 13: Overview of station sub-distribution board

Warranty and 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 "Initial Commissioning Report for Sunny Central Systems" is completed and available at SMA Solar Technology AG. The commissioning report is included in the scope of delivery of the Sunny Central.

Item Description ExplanationA Main circuit breaker Circuit breaker for the entire Transformer Compact StationB Discharger Overvoltage protectionC Voltage supply for Communit Circuit breaker for the Communit communication distribution

boxD Network solution Network terminal for the customerE Hermetical full protection

and stopCircuit breaker for the transformer protection unit

F Reserve Reserve circuit breakerG Voltage supply power outlet Circuit breaker with integrated RCD for outlet with ground

contactH Voltage supply lighting Circuit breaker for station lightingI Voltage supply SC2 Circuit breaker for the second inverterK Voltage supply SC1 Circuit breaker for the first inverter

8 Commissioning SMA Solar Technology AG


Requirements☐ The medium-voltage switchgear has to be switched off.☐ The low-voltage switchgear has to be switched off.☐ All terminals have to be connected as per the instructions and the circuit diagram (see Section 7

"Electrical Connection", page 18).Procedure:

1. Inspect the cabling to the Transformer Compact Station (see Section 8.4). 2. Make sure the temperature settings on the contact thermometer are correct:

– Warning temperature: +100°C– Actuation temperature: +110°C

5. Check the low AC voltage in the low-voltage switchgear (see Section 8.4).6. If you have an internal power supply transformer: connect the internal power supply for the

Transformer Compact Station (see Section 8.5).7. Turn on the power supply to the Transformer Compact Station with the "main circuit breaker".8. Turn on the station lighting with the "voltage supply lighting" circuit breaker.9. Energize the grounded outlet with the "voltage supply power outlet" circuit breaker with the

integrated residual current device.10. Turn on the Communit with the "voltage supply Communit" circuit breaker.11. Turn on the low-voltage switchgear (see the documentation for the low-voltage switchgear).12. Connect the internal power supply for the inverter (see section 8.6).13. Commission the inverter (see the inverter documentation).

8.3 Inspecting the Cabling to the Transformer Compact Station1. Ensure that all connections have been made in accordance with the circuit diagram.2. Ensure that all connections are securely in place.3. Check the Transformer Compact Station's equipotential bonding to the installation site.

Bond them together if needed.

3. Only a duly authorized person trained in electrical safety is allowed to connect the AC voltage of the medium-voltage transformer.Have the AC voltage of the medium-voltage transformer connected externally.

4. Only a duly authorized person is allowed to switch on the medium-voltage switchgear.Have the medium-voltage switchgear switched on (see the documentation for the medium-voltage switchgear).

SMA Solar Technology AG 8 Commissioning


8.4 Examining the Low AC Voltage in the Low-Voltage Switchgear1. Check the phase sequence of the low voltage. Correct if necessary.2. Measure the low voltage difference between the line conductors and log it in the commissioning

report.– L1 - L2– L1 - L3– L2 - L3

☑ The low voltage is within ± 5 V of the nominal voltage of the inverter.✖ Does the low voltage vary from the nominal voltage of the inverter by more than ± 5 V?

• De-energize the medium-voltage transformer.• Have a duly authorized person change the turns ratio of the medium-voltage transformer

by adjusting the on-load tap-changer.☑ The on-load tap-changer will audibly click into place. • Proceed to step 2.

8.5 Connecting the Internal Power Supply for the Transformer Compact Station

1. Open the fuse switch-disconnector.2. Insert the fuses in the fuse-switch-disconnector. 3. Close the fuse-switch-disconnector.

8.6 Connecting the Internal Power Supply for the Inverter1. Close the "Voltage supply SC 1" circuit breaker for

the first inverter. 2. If two inverters are used, additionally switch on

"Voltage supply SC 2"

9 Technical Data SMA Solar Technology AG


9 Technical Data9.1 Transformer Compact Station 500SCMedium-Voltage SideRated power (at 25°C) PACnom 550 kVAAC nominal power (at 40°C) PAC 500 kVARated grid voltage VACnom 22 kV / 33 kVAC voltage range VAC 20 kV to 24 kV / 30 kV to 36 kVRated power frequency fAC 50 HzNominal current IMVnom 13.1 A/8.7 A

Low-Voltage SideNominal input voltage VAC 270 VNominal input current ILVnom 1,070 A

Mechanical DataWidth x height x depth (base) 4,000 mm x 2,720 mm x 2,000 mm Width x height x depth (roof) 4,050 mm x 2,720 mm x 2,000 mm Weight with medium-voltage switchgear 9.0 tWeight without medium-voltage switchgear 8.7 tDegree of protection*

* As per SANS 60529

IP43

Climatic ConditionsOperating temperature range − 5°C to +40°CRelative humidity, non-condensing 15% to 98%Maximum operating altitude above mean sea level (MSL)

1,800 m

OptionsTransformer for auxiliary power supply*

* Additional power classes available on request

6 kVAMedium-voltage switchgear RE-T1 / RE-T2 / C-C-T1 / C-C-T2Low-voltage switchgear 1 fuse-disconnectorPre-assembled cable set 7.5 m / 10 m / 15 mCommunication distributor Communit

SMA Solar Technology AG 9 Technical Data


9.2 Transformer Compact Station 630SCMedium-Voltage SideRated power (at 25°C) PACnom 700 kVAAC nominal power (at 40°C) PAC 630 kVARated grid voltage VACnom 22 kV / 33 kVAC voltage range VAC 20 kV to 24 kV / 30 kV to 36 kVRated power frequency fAC 50 HzNominal current IMVnom 16.5 A/11.0 A



* As per SANS 60529

IP43


1,800 m









* As per SANS 60529

IP43


1,800 m









* As per SANS 60529

IP43


1,800 m






9.5 Transformer Compact Station 1000SCMedium-Voltage SideRated power (at 25°C) PACnom 1,100 kVAAC nominal power (at 40°C) PAC 1,000 kVARated grid voltage VACnom 22 kV / 33 kVAC voltage range VAC 20 kV to 24 kV / 30 kV to 36 kVRated power frequency fAC 50 HzNominal current IMVnom 26.2 A/17.5 A

Low-Voltage SideNominal input voltage VAC 270 VNominal input current ILVnom 2 x 1,070 A


* As per SANS 60529

IP43


1,800 m



6 kVAMedium-voltage switchgear RE-T1 / RE-T2 / C-C-T1 / C-C-T2Low-voltage switchgear 2 fuse-disconnectorsPre-assembled cable set 7.5 m / 10 m / 15 mCommunication distributor Communit





Mechanical DataWidth x height x depth (base) 4,000 mm x 2,720 mm x 2,000 mmWidth x height x depth (roof) 4,050 mm x 2,720 mm x 2,000 mmWeight with medium-voltage switchgear 11.1 tWeight without medium-voltage switchgear 10.8 tDegree of protection*

* As per SANS 60529

IP43


1,800 m









* As per SANS 60529

IP43


1,800 m









* As per SANS 60529

IP43


1,800 m




10 Contact SMA Solar Technology AG


10 ContactIf you have technical problems concerning our products, contact the SMA Service Line. We need the following data in order to provide you with the necessary assistance:

• Serial number of the Transformer Compact Station• Type designation of the Transformer Compact Station• Installation site address

South Africa SMA Solar Technology South Africa Pty Ltd.Centurion (Pretoria)

08600 SUNNY (08600 78669)International: +27 (12) 643 1785

www.SMA-Solar.comSMA Solar Technology

Documents

TRANSFORMER COMPACT STATION 500SC-ZA…files.sma.de/dl/21738/TCS-ZA-IA-en-10.pdf · Installation Manual ... • Transformer Compact Station 500SC‑ZA ... Installation Manual TCS-ZA-IA-en-10