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SMA NA-BOX 12 Operating Manual

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Operating Manual
NA-BOX 12
NA-BOX-12-3-20-BE-en-11 | Version 1.1
ENGLISH

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  • Page 1 Operating Manual NA-BOX 12 NA-BOX-12-3-20-BE-en-11 | Version 1.1 ENGLISH...
  • Page 2 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.

  • Page 3: Table Of Contents

    SMA Solar Technology AG Table of Contents Table of Contents NA-BoxInformation on this Document ..........5 1.1 Validity .
  • Page 4 Table of Contents SMA Solar Technology AG 10 Maintenance ..............28 10.1 Testing the Residual-Current Devices .

  • Page 5: Na-Boxinformation On This Document

    1  Information on this Document 1 Information on this Document 1.1 Validity This document is valid for the device type "NA-BOX-12.3-20" (NA-Box 12). 1.2 Target Group The activities described in this document must be performed by qualified persons only. Qualified persons must have the following skills: •...

  • Page 6: Typographies

    1  Information on this Document SMA Solar Technology AG 1.5 Typographies Typography Application Example bold • Display messages • Connect the line conductors to the spring-cage terminals L1, L2 and L3 on the • Parameters MC BOX terminal. • Terminals •...

  • Page 7: Safety

    2.1 Intended Use The NA-Box is an automatic transfer switch and enables the operation of an SMA multicluster system on a utility grid in accordance with the VDE-AR-N 4105 application regulations. In the event of a grid failure, the NA-Box disconnects the SMA multicluster system from the utility grid via a redundant tie switch.

  • Page 8: Safety Information

    SMA Solar Technology AG. Unauthorized alterations will void guarantee and warranty claims and will usually void the operation license. SMA Solar Technology AG shall not be held liable for any damage caused by such alterations. Any use of the product other than that described in the Intended Use section does not qualify as the intended use.
  • Page 9 SMA Solar Technology AG 2  Safety Risk of injury if the NA-Box tips over The NA-Box is heavy and may tip over if not properly fastened to the support surface. This can result in injuries due to crushing. • Upon installation, attach the NA-Box to the support surface.

  • Page 10: Scope Of Delivery

    3  Scope of Delivery SMA Solar Technology AG 3 Scope of Delivery Check the scope of delivery for completeness and any externally visible damage. Contact your distributor if the scope of delivery is incomplete or damaged. Figure 2: Components included in the scope of delivery...

  • Page 11: Product Description

    4.1 NA-Box The NA-Box is an automatic transfer switch and enables the operation of an SMA multicluster system on a utility grid in accordance with the VDE-AR-N 4105 application regulations. In the event of a grid failure, the NA-Box disconnects the SMA multicluster system from the utility grid via a redundant tie switch.
  • Page 12 4  Product Description SMA Solar Technology AG Position Designation Explanation Residual-current device Protects against electric shock and is always used in addition to existing protective measures such as insulation or protective grounding. A summation current transformer in the residual-current device detects the electric currents in the conductors L1, L2, L3 and N.

  • Page 13: Type Label

    The type label clearly identifies the product. The type label is located on the right-hand side of the enclosure. You will find the following information on the type label: • Address of SMA Solar Technology AG • Device type (Type) •...

  • Page 14: Installation

    Climatic conditions must be met (see Section 12 "Technical Data", page 34). The mounting location must be below 2000 m above MSL. If you would like to use the NA-Box at altitudes above 2000 m, contact the SMA Service Line (see Section 13, page 37). Minimum clearances Figure 5: Minimum clearances...

  • Page 15: Preparing The Mounting Location

    SMA Solar Technology AG 5  Installation 5.3 Preparing the Mounting Location Danger to life due to fire or explosion Despite careful construction, electronic devices can cause fires if they are not installed properly. Contact with flammable materials allows the fire to spread. This can result in death or serious injury.

  • Page 16: Transporting And Mounting The Na-Box

    5  Installation SMA Solar Technology AG 5.4.2 Transporting and Mounting the NA-Box Danger of crushing if the raised or suspended NA-Box tips over or falls The NA-Box can tip over or fall if it is lifted or transported carelessly or hastily. This can result in death or serious injury.

  • Page 17: Electrical Connection

    SMA Solar Technology AG 6  Electrical Connection 6 Electrical Connection 6.1 Overview of the Connection Area 6.1.1 Components and Terminals Figure 8: Overview of the Connection Area Position Designation Explanation Terminals X210, X211 with spring-cage terminals For connecting the Multicluster-Box control...

  • Page 18: Enclosure Openings In The Floor

    6  Electrical Connection SMA Solar Technology AG 6.1.2 Enclosure Openings in the Floor Figure 9: Position of the enclosure openings Position Explanation Enclosure openings for the control cables Enclosure openings for the Multicluster-Box power cables Enclosure openings for the utility grid power cables 6.2 Connecting the Multicluster-Box...

  • Page 19: Connecting The Control Cables

    SMA Solar Technology AG 6  Electrical Connection Procedure: 1. Insert the power cables into the NA-Box (see Section 9.3, page 25). 2. Connect the grounding conductor to the spring-cage terminal PE at terminal X201:5 (see Section 9.4.1, page 26). 3. Connect the neutral conductor to the spring-cage terminal N at terminal X201:4.

  • Page 20: Mounting The Kick Plates

    6  Electrical Connection SMA Solar Technology AG Procedure: 1. Insert the control cables into the NA-Box (see Section 9.3, page 25). 2. Connect the control cables to the spring-cage terminals (see Section 9.4.2, page 27). • X210:1,2: Multicluster-Box grounding contactor interlock • X210:4,5: NA-Box grid contactor feedback •...

  • Page 21: Preparing The Multicluster System For Commissioning

    SMA Solar Technology AG 7  Preparing the Multicluster System for Commissioning 7 Preparing the Multicluster System for Commissioning Injury to persons or property damage due to unauthorized access Unauthorized access or incorrect settings on the grid and PV system protection device in the NA-Box can cause grid failures, yield losses, damage to the multicluster system or the NA-Box and injuries to persons.

  • Page 22: Disconnecting The Na-Box And Multicluster System From Voltage Sources

    8  Disconnecting the NA-Box and Multicluster System from Voltage Sources SMA Solar Technology AG 8 Disconnecting the NA-Box and Multicluster System from Voltage Sources 1. Disconnect the loads. 2. Stop the multicluster system at the master of the main cluster (see Sunny Island inverter documentation).

  • Page 23: Periodic Actions

    SMA Solar Technology AG 9  Periodic Actions 9 Periodic Actions 9.1 Removing the Protective Cover Danger to life due to electric shock High voltages are present in the NA-Box and the multicluster system. Touching live components can result in death or serious injury due to electric shock.

  • Page 24: Mounting The Protective Cover

    9  Periodic Actions SMA Solar Technology AG 9.2 Mounting the Protective Cover 1. Insert the protective cover into the NA-Box. 2. Insert all four fastening screws and tighten them (TX 30, torque: 4 Nm). NA-BOX-12-3-20-BE-en-11 Operating Manual...

  • Page 25: Inserting The Cables

    SMA Solar Technology AG 9  Periodic Actions 9.3 Inserting the Cables Damage to the NA-Box due to moisture penetration Dust and moisture can penetrate the NA-Box due to overstretched or damaged membranes. Dust and moisture can cause irreparable damage to the NA-Box.

  • Page 26: Connection To Spring-Cage Terminals

    9  Periodic Actions SMA Solar Technology AG 9.4 Connection to Spring-Cage Terminals 9.4.1 Connecting Power Cables to Spring-Cage Terminals 1. Insert the screwdriver into the clamping contact of the spring-cage terminal. 2. Push the screwdriver upwards in two stages as far as the stop.

  • Page 27: Connecting Control Cables To Spring-Cage Terminals

    SMA Solar Technology AG 9  Periodic Actions 9.4.2 Connecting Control Cables to Spring-Cage Terminals 1. Using a screwdriver, press and hold down the orange break contact of the spring-cage terminal. 2. Insert the stripped insulated conductor into the spring-cage terminal until it reaches the stop. When doing so, ensure that no insulation is trapped in the terminal.

  • Page 28: Maintenance

    10  Maintenance SMA Solar Technology AG 10 Maintenance 10.1 Testing the Residual-Current Devices Test interval for residual-current devices The test interval for residual-current devices depends on the prevailing operating temperature. • At prevailing operating temperatures of up to 40°C: every 6 months •...

  • Page 29: Testing The Surge Arrester

    SMA Solar Technology AG 10  Maintenance 10.2 Testing the Surge Arrester Test interval for surge arresters The test interval for surge arresters depends on the prevailing operating temperature. • At prevailing operating temperatures of up to 40°C: every 6 months •...

  • Page 30: Testing The Tie Switch Tripping Function Every 6 Months

    10  Maintenance SMA Solar Technology AG 10.3 Testing the Tie Switch Tripping Function Every 6 Months Instruction for end users Testing the tie switch is not hazardous and can be performed by the end user. However, if the tie switch does not trip, the NA-Box and the multicluster system must be disconnected from voltage sources by a qualified person.

  • Page 31: Maintenance Work Every 12 Months

    The mounting location and ambient conditions influence the maintenance intervals. More frequent cleaning and corrosion protection work may be necessary in adverse ambient conditions. • If the NA-Box is subject to adverse ambient conditions, SMA Solar Technology AG recommends carrying out maintenance work on the NA-Box more frequently.
  • Page 32 10  Maintenance SMA Solar Technology AG Maintenance work • Check whether the NA-Box is free of corrosion damage. If the NA-Box displays minor corrosion damage, treat the affected area as follows: • Sand the affected area. • Clean the affected area with degreaser.

  • Page 33: Decommissioning

    SMA Solar Technology AG 11  Decommissioning 11 Decommissioning 11.1 Disassembling the NA-Box High voltages are present in the NA-Box and the multicluster system. Touching live components results in death or serious injury due to electric shock. • Disconnect the NA-Box and multicluster system from voltage sources (see Section 8, page 22).

  • Page 34: Technical Data

    12  Technical Data SMA Solar Technology AG 12 Technical Data Utility grid connection Number of terminals 1 x three-phase Rated input power 138 kW Rated operating voltage between L and N 230 V Rated operating voltage between L1 and L2...
  • Page 35 SMA Solar Technology AG 12  Technical Data Auxiliary electric circuits Fuse 10x38 cylinder fuse Maximum permitted fuse rating F223 to F227: 1 A F220 to F222: 6 A Terminals for connecting the control cables Spring-cage terminal Minimum conductor cross-section 0.75 mm²...
  • Page 36 12  Technical Data SMA Solar Technology AG EMC environment** Interference immunity, environment A (EMC Directive Article 5 – Annex I.1.b) EMC emissions, environment B (EMC Directive, Article 5 – Annex I.1.a) EC Declaration of Conformity Operating temperature range***** − 20°C to +50°C...

  • Page 37: Contact

    SMA Solar Technology AG 13  Contact 13 Contact If you experience any technical problems with our products, please contact the SMA Service Line. We require the following information in order to provide you with the necessary assistance: • Multicluster-Box type •...
  • Page 38 +27 (0)21 826 0600 Australia SMA Australia Pty Ltd. Other countries International SMA Service Line Sydney Niestetal Toll free for Australia: 1800 SMA Toll free worldwide: 00800 SMA SERVICE (1800 762 287) (+800 762 7378423) International: +61 2 9491 4200 NA-BOX-12-3-20-BE-en-11...
  • Page 40 SMA Solar Technology www.SMA-Solar.com...

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