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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.
1 Information on this Document 1.1 Validity This document is valid for the device type "GRID-CONNECT-BOX 12.3-20" (Grid-Connect-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: •...
1 Information on this Document SMA Solar Technology AG 1.5 Typographies Typography Application Example bold • Display messages • Connect the neutral conductor to the spring-cage terminal N at terminal X301:6. • Parameter • Connect the line conductors to the •...
SMA Solar Technology AG 2 Safety 2 Safety 2.1 Intended Use The Grid-Connect-Box is an automatic transfer switch which enables the safe operation of the utility grid and an electricity generator as energy sources of an SMA multicluster system. Figure 1: Circuitry principle of a multicluster system with the Grid-Connect-Box The technical connection requirements of the grid operator and the local standards and directives specify whether the multicluster system, in the event of grid failure, disconnects from the utility grid at all poles or only the line conductors.
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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.
SMA Solar Technology AG 2 Safety 2.2 Safety Information This Section contains safety information that must be observed at all times during work on or with the product. To prevent personal injury and property damage and to ensure long-term operation of the product, read this Section carefully and observe all safety information at all times.
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...
SMA Solar Technology AG 4 Product Description 4 Product Description 4.1 Grid-Connect-Box The Grid-Connect-Box is an automatic transfer switch which enables the safe operation of the utility grid and an electricity generator as energy sources of an SMA Multicluster System.
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4 Product Description SMA Solar Technology AG Residual-current device Figure 4: Overview of the residual-current device Position Designation Explanation Test button The functionality of the residual-current device must be tested regularly (see Section 10.1, page 28). Switch lever Top position: ON - residual-current device is switched on.
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) •...
5 Installation SMA Solar Technology AG 5 Installation 5.1 Storing the Grid-Connect-Box • Store the Grid-Connect-Box in a dry place at an ambient temperature of between − 25°C and +60°C. 5.2 Requirements for Mounting Mounting Location A firm, even support surface, e.g., a concrete foundation, must be available for mounting.
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.
5 Installation SMA Solar Technology AG 5.4.2 Transporting and Mounting the Grid-Connect-Box Danger of crushing if the raised or suspended Grid-Connect-Box tips over or falls The Grid-Connect-Box can tip over or fall if it is lifted and transported carelessly or hastily. This can result in death or serious injury.
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 X310, X311 with spring-cage Spring-cage terminals for connecting the control cables...
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 Deactivating All-Pole Disconnection...
SMA Solar Technology AG 6 Electrical Connection 6.4 Connecting the Utility Grid Cable requirements: Conductor material: copper The conductor cross-section must be selected according to the rated input power of the utility grid. Conductor cross-section: 50 mm² to 150 mm²...
6 Electrical Connection SMA Solar Technology AG Cable requirements: Conductor material: copper Conductor cross-section: 1.5 mm² to 2.5 mm² The AC conductors and DC conductors must always be routed in separate cables. Ground connection at terminals X310 and X311 If the control cable between the Multicluster-Box and Grid-Connect-Box contains a grounding conductor, the grounding conductor terminal must not be connected on both sides.
SMA Solar Technology AG 7 Preparing the Multicluster System for Commissioning 7 Preparing the Multicluster System for Commissioning Service assignments for Sunny Island system In order to receive service assignments for the Sunny Island system, all system data must be recorded in the information sheet for Sunny Island systems during commissioning and made available to Service (for information sheet see www.SMA-Solar.com).
8 Disconnecting the Grid-Connect-Box and Multicluster System from Voltage Sources SMA Solar Technology AG 8 Disconnecting the Grid-Connect-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).
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 Grid-Connect-Box and the multicluster system. Touching live components can result in death or serious injury due to electric shock.
9 Periodic Actions SMA Solar Technology AG 9.2 Mounting the Protective Cover 1. Insert the protective cover into the Grid-Connect-Box. 2. Insert all four fastening screws and tighten them (TX 30, torque: 4 Nm). GRID-BOX-12-3-20-BE-en-11 Operating Manual...
SMA Solar Technology AG 9 Periodic Actions 9.3 Inserting the Cables Damage to the Grid-Connect-Box due to moisture penetration Dust and moisture can penetrate the Grid-Connect-Box due to overstretched or damaged membranes. Dust and moisture can cause irreparable damage to the Grid-Connect-Box.
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.
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.
10 Maintenance SMA Solar Technology AG 10 Maintenance 10.1 Testing the Residual-Current Device 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 •...
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 Grid-Connect-Box is subject to adverse ambient conditions, SMA Solar Technology AG recommends carrying out maintenance work on the Grid-Connect-Box more frequently.
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10 Maintenance SMA Solar Technology AG Required maintenance materials and tools: Only those consumables and maintenance materials not normally included in the standard equipment of an electrically qualified person are listed below. It is assumed that standard tools and materials such as torque wrenches are available for all maintenance operations.
SMA Solar Technology AG 11 Decommissioning 11 Decommissioning 11.1 Disassembling the Grid-Connect-Box High voltages are present in the Grid-Connect-Box and the multicluster system. Touching live components results in death or serious injury due to electric shock. • Disconnect the Grid-Connect-Box and multicluster system from voltage sources (see Section 8, page 22).
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...
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SMA Solar Technology AG 12 Technical Data Auxiliary electric circuits Fuse 10x38 cylinder fuse Maximum permitted fuse rating F333 to F336: 1 A Terminals for connecting the control cables Spring-cage terminal Minimum conductor cross-section 0.75 mm² Maximum conductor cross-section 2.5 mm²...
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12 Technical Data SMA Solar Technology AG EMC environment** EMC emissions, environment B (EMC Directive, Article 5 – Annex I.1.a) Interference immunity, environment A (EMC Directive Article 5 – Annex I.1.b) EC Declaration of Conformity Operating temperature range***** − 25°C to +60°C...
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 •...
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13 Contact SMA Solar Technology AG United Arab SMA Middle East LLC India SMA Solar India Pvt. Ltd. Emirates Abu Dhabi Mumbai +971 2234 6177 +91 22 61713888 대한민국 SMA Technology Korea Co., Ltd. SMA Solar (Thailand) Co., Ltd. 서울...
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