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6 Electrical Connection

SMA Solar Technology AG

20

MC-BOX-12-3-20-BE-en-10

Operating Manual

3. Connect the neutral conductor to the spring-cage terminal

N

at terminal

(see Section 9.4.1, page 34).

4. Connect the line conductors to the spring-cage terminals

L1

,

L2

and

L3

at terminal

X102:1-3

.

5. Ensure that a right-hand rotating magnetic field is present at the generator terminal.
6. Provide for strain relief of the power cables by attaching them to the appropriate cable support rail. Use the strain

reliefs and counter-troughs provided.

7. According to the type of cable routing and the installation conditions, determine the required fuse link for the fuse

switch-disconnector and insert it into the fuse switch-disconnector

Generator

.

6.4 Connecting the Utility Grid

To connect the utility grid in addition to the generator, it is necessary to install either a Grid Connect Box or an NA Box

between the utility grid and the Multicluster Box.

Requirements:

If using Grid Connect Box:

The Grid Connect Box must be properly installed (see operating manual of the Grid

Connect Box).

If using NA Box:

The NA Box must be properly installed (see operating manual of the NA Box).

Cable requirements:

Conductor material: copper
Conductor cross-section: 120 mm² to 150 mm²
The power cables must be ground-fault and short-circuit protected.

Procedure:

1. Insert the power cables into the Multicluster Box (see Section 9.3.1, page 31).
2. Connect the grounding conductor to the grounding busbar

(AF 17, torque: 15 Nm). To do this, use the screw terminal

included in the scope of delivery.

3. Connect the neutral conductor to the spring-cage terminal

N

at terminal

(see Section 9.4.1, page 34).

4. Connect the line conductors to the spring-cage terminals

L1

,

L2

and

L3

at terminal

X101:1-3

.

5. Ensure that a right-hand rotating magnetic field is present at the terminal of the Grid Connect Box / NA Box.
6. Provide for strain relief of the power cables by attaching them to the appropriate cable support rail. Use the strain

reliefs and counter-troughs provided.

The grid terminal output fuse influences dimensioning of the PV system power cables

Remember that the size of the grid fuse affects the dimensioning of the PV system cable (see Section 6.6 "Connecting

the PV System", page 22).

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Содержание MC-BOX-12.3-20

Страница 1: ...MC BOX 12 3 20 BE en 10 Version 1 0 ENGLISH Operating Manual MULTICLUSTER BOX 12 ...

Страница 2: ...are recognized even if not explicitly identified as such A lack of identification does not mean that a product or symbol is not trademarked The BLUETOOTH word mark and logos are registered trademarks owned by Bluetooth SIG Inc and any use of these marks by SMA Solar Technology AG is under license Modbus is a registered trademark of Schneider Electric and is licensed by the Modbus Organization Inc ...

Страница 3: ...icluster Box 16 6 Electrical Connection 17 6 1 Overview of the Connection Area 17 6 1 1 Components and Terminals 17 6 1 2 Enclosure Openings in the Floor 18 6 2 Installing the Multicluster Box without Grid Connect Box or NA Box 19 6 3 Connecting the Generator 19 6 4 Connecting the Utility Grid 20 6 5 Connecting the Loads 21 6 6 Connecting the PV System 22 6 7 Connecting the Sunny Island Inverters ...

Страница 4: ...ables 31 9 3 1 Inserting Power and Control Cables 31 9 3 2 Inserting Data Cables 32 9 4 Connection to Spring Cage Terminals 34 9 4 1 Connecting Power Cables to Spring Cage Terminals 34 9 4 2 Connecting Control Cables to Spring Cage Terminals 35 10 Maintenance 36 10 1 Inspection of Residual Current Devices 36 10 2 Maintenance Work every 12 Months 37 11 Decommissioning 39 11 1 Disassembling the Mult...

Страница 5: ...nformation 1 3 Additional Information Links to additional information can be found at www SMA Solar com 1 4 Symbols Document title Document type GRID CONNECT BOX 12 Operating manual NA BOX 12 Operating manual document only available in German SUNNY ISLAND 3 0M 4 4M 6 0H 8 0H Installation manual BATFUSE B 01 B 03 Operating manual Symbol Explanation 1 5 Indicates a hazardous situation which if not a...

Страница 6: ...to be selected or entered Connect the neutral conductor to the spring cage terminal N at terminal X102 4 Links several elements to be selected Button Key Button on device to be selected or pressed Press the TEST button on each residual current device in the Multicluster Box Complete designation Designation in this document Multicluster Box 12 Multicluster Box Grid Connect Box 12 Grid Connect Box N...

Страница 7: ...an off grid system or with increased self consumption and battery backup function as a battery backup system Figure 1 Circuitry principle of a Multicluster Box The Multicluster Box is not suitable for supplying life sustaining medical devices A power outage must not lead to personal injury Cables with copper wires must be used for the installation of the Multicluster Box Do not exceed the maximum ...

Страница 8: ...e device type must be installed in a cluster Different clusters may be equipped with inverters of different device types All work on the product must only be performed using appropriate tools and in compliance with the ESD protection regulations Suitable personal protective equipment has to be worn by all persons working on or with the product The Multicluster Box is designed for use at altitudes ...

Страница 9: ... out any work on the Multicluster Box see Section 8 page 28 Always operate the Multicluster Box with its protective cover in place All work on the Multicluster Box must be carried out by qualified persons only Do not touch any live components in the Multicluster Box or any other devices of the multicluster system 87 21 Risk of injury if the Multicluster Box tips over The Multicluster Box is heavy ...

Страница 10: ...esignation A 1 Multicluster Box B 1 Data cable for communication 5 m black C 3 Data cable for measurement and control signals 5 m red D 14 Cable clamp with counter sleeve 22 mm to 28 mm E 3 LV HRC size 1 fuse link 200 A F 1 Set of non woven adhesive labels for cable designation G 4 Terminal incl screws for connecting the protective conductors H 3 Fuse link 1 A tripping characteristics gG I 1 SD me...

Страница 11: ...lticluster Box with cabinet door open Position Designation Explanation A Protective cover Prevent inadvertent contact with live components during operation and thus protect from electric shocks When the Multicluster Box is in operation the protective covers must always be mounted B Protective cover C Residual current device Protects against electric shock and is always used in addition to existing...

Страница 12: ...und the neutral conductor in the grid of the multicluster system Therefore in multicluster systems with all pole disconnection the grounding contactor of the Multicluster Box must ground the neutral conductor in the event of grid failure The grounding contactor ensures the necessary protection in case of indirect contact with live components The grounding contactor is in fail safe design If the ne...

Страница 13: ...gh voltages The product operates at high voltages All work on the product must be carried out by qualified persons only Risk of burns due to hot surfaces The product can get hot during operation Avoid contact during operation Allow the product to cool down sufficiently before carrying out any work Wear personal protective equipment such as safety gloves Observe the documentation Observe all docume...

Страница 14: ...s must be met see Section 12 Technical Data page 40 The mounting location must be below 3 000 m above MSL If you wish to use the Multicluster Box at elevations above 3 000 m contact the SMA Service Line see Section 14 page 46 Minimum Clearances Figure 5 Minimum clearances There must be sufficient space at the mounting location to ensure compliance with the minimum clearances There must be a distan...

Страница 15: ...chors to fasten the Multicluster Box to the support surface Procedure 1 On the mounting surface mark the position of the four drill holes for attaching the base 2 Drill holes at the marked positions 3 Insert screw anchors 51 1 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 a...

Страница 16: ... death or serious injury Always transport the Multicluster Box as close to the ground as possible All means of transport and auxiliary equipment used must be designed for the weight of the Multicluster Box of 200 kg Transport the Multicluster Box in an upright position Keep a safe distance from the Multicluster Box at all times during transport Take the center of gravity of the Multicluster Box in...

Страница 17: ... HRC size 1 fuse links of the generator terminal B Fuse switch disconnector F102 For LV HRC size 1 fuse links of the load terminal C Residual current device of the Sunny Island inverters D Circuit breakers To protect the power cables of the Sunny Island inverters E Spring cage terminals X105 To connect the power cables of the Sunny Island inverters F Grounding contactor G Spring cage terminals X10...

Страница 18: ...ring cage terminals L1 L2 L3 and N To connect the line conductors and the neutral conductor of the main distribution for loads M Terminal X102 with spring cage terminals L1 L2 L3 and N To connect the line conductors and the neutral conductor of the generator N Terminal X101 with spring cage terminals L1 L2 L3 and N To connect the line conductors and the neutral conductor of the Grid Connect Box or...

Страница 19: ...tors are routed via fuse switch disconnectors in the Multicluster Box LV HRC size 1 fuse links 200 A are installed in the fuse switch disconnector by default Cable requirements Conductor material copper Conductor cross section 120 mm to 150 mm If the generator does not have an output fuse the generator connection cables must be ground fault and short circuit protected Procedure 1 Insert the power ...

Страница 20: ... installed see operating manual of the Grid Connect Box If using NA Box The NA Box must be properly installed see operating manual of the NA Box Cable requirements Conductor material copper Conductor cross section 120 mm to 150 mm The power cables must be ground fault and short circuit protected Procedure 1 Insert the power cables into the Multicluster Box see Section 9 3 1 page 31 2 Connect the g...

Страница 21: ... the spring cage terminal N at terminal X103 4 see Section 9 4 1 page 34 4 Connect the line conductors to the spring cage terminals L1 L2 and L3 at terminal X103 1 3 5 Ensure that a right hand rotating magnetic field is present at the load terminal 6 Provide for strain relief of the power cables by attaching them to the appropriate cable support rail Use the strain reliefs and counter troughs prov...

Страница 22: ...x see Section 9 3 1 page 31 2 Connect the grounding conductor to the grounding busbar AF 17 torque 15 Nm To do this use the screw terminal included in the scope of delivery 3 Connect the neutral conductor to the spring cage terminal N at terminal X104 4 see Section 9 4 1 page 34 4 Connect the line conductors to the spring cage terminals L1 L2 and L3 at terminal X104 1 3 5 Provide for strain relief...

Страница 23: ...ox are not connected to the grounding conductor by default To ensure safe operation of the multicluster system you must perform the following action prior to commissioning Cable requirement Conductor material copper Procedure Ground the multicluster system outside the Multicluster Box on the generator side To do this connect the neutral conductor to the grounding conductor observing all standards ...

Страница 24: ... Insert the control cables into the Multicluster Box see Section 9 3 1 page 31 2 Connect the cables to the spring cage terminals X106 X112 and X113 see Section 9 4 2 page 35 X106 control voltage of the main cluster X112 control cables from Sunny Island 1 of the main cluster X113 control cables from Sunny Island 2 of the main cluster 6 9 3 Connecting the BatFuse Cable requirements Conductor materia...

Страница 25: ...e that the insulated conductors are firmly in place 6 9 5 Connecting the Control Cables to the NA Box Cable requirements Conductor material copper Conductor cross section 1 5 mm to 2 5 mm Procedure 1 Insert the control cables into the Multicluster Box see Section 9 3 1 page 31 2 Connect the control cables to the spring cage terminals see Section 9 4 2 page 35 X110 1 2 block of grounding contactor ...

Страница 26: ...ommunication between the Sunny Island inverters and the Multicluster Box black to pin connector ComSyncIn 4 Connect the other end of the data cable to pin connector ComSyncIn of a Sunny Island inverter in the main cluster Since all Sunny Island inverters of the main cluster master and slaves are interconnected via a communication bus the Multicluster Box can be connected to a slave or to the maste...

Страница 27: ...y enclosed by a membrane or cable feed through in the floor of the Multicluster Box All power cables of the generator loads PV system and Sunny Island inverters must be retained inside or outside the Multicluster Box In a multicluster system with Grid Connect Box NA Box all power cables must be retained inside or outside the Multicluster Box The floor of the Multicluster Box must be closed with th...

Страница 28: ...d Connect Box or NA Box is installed perform the following steps Open the Grid Connect Box or NA Box In the Grid Connect Box or NA Box switch off all circuit breakers and residual current devices Switch off the AC voltage supply at the grid connection point 8 Open the Multicluster Box 10 Disassemble the protective cover see Section 9 1 page 29 11 Ensure that the Multicluster Box is voltage free 12...

Страница 29: ... and the multicluster system Touching live components can result in death or serious injury due to electric shock Disconnect the Multicluster Box and multicluster system from all voltage sources before carrying out any work on the Multicluster Box see Section 8 page 28 87 21 Risk of burns due to hot components Components and terminals inside the Multicluster Box can get hot during operation Touchi...

Страница 30: ...rating Manual 2 Remove the protective cover 3 Retain the protective cover and the fastening screws for later use 9 2 Mounting the Protective Cover Procedure 1 Insert the protective cover in the Multicluster Box 2 Insert all fastening screws and tighten them TX 30 torque 4 Nm ...

Страница 31: ...is not too large Insert each cable through the membrane of the selected enclosure opening into the Multicluster Box Ensure that the cable is tightly enclosed by the membrane Strip the insulation of each cable Ensure that the seal at the edge of the base plate is firmly attached 4 Insert the base plates and tighten all screws TX 25 screwdriver torque 9 Nm 05 Damage to the Multicluster Box due to mo...

Страница 32: ...he mounting plate and set it aside 3 Remove the cable feed through from the enclosure 4 Loosen the screws of the two part cable feed through 5 Remove the half without the T shaped fastening pieces 6 Lay the data cables for communication control and measuring signals into the half with the T shaped fastening pieces and secure with cable ties Ensure sufficient cable length from the cable feed throug...

Страница 33: ...ts must be firmly clamped between both sides of the two part cable feed through This ensures tightness of the enclosure seal 8 Position the cable feed through including cable on the outside of the enclosure 9 Attach the mounting plate of the two part cable feed through and fasten hand tight 10 Repeat steps 1 to 9 for the remaining data cables Use the second two part cable feed through for this ...

Страница 34: ...is pretensions the spring of the spring cage terminal The spring cage terminal emits an audible click when the clamping contact is sufficiently pretensioned 3 Insert the stripped insulated conductor into the spring cage terminal until it reaches the stop Ensure that no insulation gets trapped in the terminal 4 Press the screwdriver down and pull it out of the clamping contact The spring in the spr...

Страница 35: ...e spring cage terminal 2 Insert the stripped insulated conductor into the spring cage terminal until it reaches the stop Ensure that no insulation gets trapped in the terminal 3 Pull the screwdriver out of the clamping contact The spring in the spring cage terminal securely clamps the insulated conductor 4 Make sure that the insulated conductor is securely attached and that no insulation is trappe...

Страница 36: ...e system at the master of the main cluster see operating manual of Sunny Island inverter 5 Document the test result in accordance with the locally applicable standards and directives This will be your proof that regular inspection has taken place Inspection interval for residual current devices The inspection interval for residual current devices depends on the prevailing operating temperature At ...

Страница 37: ...uence the maintenance intervals Geographic location and ambient conditions influence the length of maintenance intervals More frequent cleaning and corrosion protection work may be necessary in adverse ambient conditions If the Multicluster Box is subject to adverse ambient conditions SMA Solar Technology AG recommends carrying out maintenance work more frequently SMA Solar Technology AG recommend...

Страница 38: ...s follows Sand the area Clean the area with degreaser Paint the area If the Multicluster Box displays large scale corrosion damage treat the entire surface as follows Sand the surface Clean the entire surface with degreaser Paint the entire surface Check all door seals for damage If a door seal is damaged replace this seal Apply talcum petroleum jelly or wax to seals This will prevent frost damage...

Страница 39: ...5 High voltages are present in the Multicluster Box and the multicluster system Touching live components results in death or serious injury due to electric shock Disconnect the Multicluster Box and multicluster system see Section 8 page 28 8 51 1 Danger of crushing if the raised or suspended Multicluster Box topples or falls The Multicluster Box can topple or fall if it is lifted and transported c...

Страница 40: ... of the Sunny Island inverters 72 kW Rated operating voltage between L and N 230 V Rated operating voltage between L1 and L2 400 V Current at rated values for Sunny Island inverters 12 x 26 A Unaffected short circuit current maximum relative rated short circuit current 10 kA Terminals for connection N PE L Spring cage terminals Recommended conductor cross section 10 mm Maximum connectable conducto...

Страница 41: ...nt maximum relative rated short circuit current 10 kA Maximum permissible back up fuse 200 A Number of terminals 1 x 3 phase Rated input power 138 kW Rated operating voltage between L and N 230 V Rated operating voltage between L1 and L2 400 V Rated current AC input current 3 x 200 A Terminals for connection N PE L1 L2 L3 Spring cage terminals Maximum connectable conductor cross section 150 mm Max...

Страница 42: ...cement of equipment by electrically qualified persons only actuation of test buttons and read off of information by unqualified persons permitted Measures for protection against electric shock Basic protection afforded by insulation materials and covers fault protection by grounding conductors and short circuit protection devices personal protection by residual current devices Degree of protection...

Страница 43: ...erature curve Rated voltage rated insulation voltage Output power rated power up to 25 C 138 kW Output power rated power up to 60 C Derating according to power temperature curve Switch cabinet wiring L to N 250 V AC Switch cabinet wiring L1 to L2 433 V AC Auxiliary AC circuits 250 V AC Auxiliary DC circuits 70 V DC ...

Страница 44: ...ses with the number of clusters The clusters are connected in parallel via a Multicluster Box The size of the Multicluster Box is determined as a function of the power requirement during system design Multicluster Box The Multicluster Box is the main AC distribution board in the multicluster system and a component of the SMA multicluster technology The Multicluster Box connects the Sunny Island cl...

Страница 45: ...tension cluster Communicating with the Multicluster Box If the master of the main cluster stops operation the entire multicluster system shuts down If a diesel generator is integrated in the stand alone grid it will take over the power supply to the loads in this case Extension cluster An extension cluster is a cluster within the multicluster system which is subordinated to the main cluster The ma...

Страница 46: ...or Australia 1800 SMA AUS 1800 762 287 International 61 2 9491 4200 Belgien Belgique België Luxemburg Luxembourg Nederland SMA Benelux BVBA SPRL Mechelen 32 15 286 730 Argentina Brasil Chile Perú SMA South America SPA Santiago 562 2820 2101 Česko Magyarország Polska România Slovensko SMA Central Eastern Europe s r o Praha 420 235 010 417 Danmark Deutschland Österreich Schweiz SMA Solar Technology ...

Страница 47: ...on Pretoria 08600 SUNNY 08600 78669 International 27 12 622 3000 Ελλάδα Κύπ ο Kıbrıs България SMA Hellas AE Αθήνα 30 210 9856666 Italia SMA Italia S r l Milano 39 02 8934 7299 United Kingdom SMA Solar UK Ltd Milton Keynes 44 1908 304899 SMA Solar Thailand Co Ltd 66 2 670 6999 대한민국 SMA Technology Korea Co Ltd 서울 82 2 520 2666 SMA Middle East LLC 971 2 234 6177 Other countries International SMA Serv...

Страница 48: ...www SMA Solar com SMA Solar Technology ...

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