3
Installation Manual
SMA Solar Technology AG
DC-CMB-IA-U15-xx-en
2 Table of Contents
Table of Contents
1 Information on this Document................................................................................................................ 4
2 Safety ....................................................................................................................................................... 5
2.1 Intended Use ................................................................................................................................................................................................... 5
2.2 Skills of Qualified Persons .......................................................................................................................................................................... 5
2.3 Instructions and Warnings.......................................................................................................................................................................... 5
2.4 Position and securing ................................................................................................................................................................................... 6
2.5 Safety Precautions ........................................................................................................................................................................................ 7
3 Scope of Delivery .................................................................................................................................. 9
4 Product Description ............................................................................................................................... 10
4.1 Combiner Box DC-CMB-U15-16/24/32..................................................................................................................................................10
4.2 Type Label......................................................................................................................................................................................................10
4.3 DC Load-Break Switch ................................................................................................................................................................................11
4.4 Suggestion on fuse choosing ....................................................................................................................................................................11
4.5 String Fuses....................................................................................................................................................................................................12
4.6 Overvoltage Protection..............................................................................................................................................................................12
5 Assembly................................................................................................................................................ 13
5.1 Wall Mounting................................................................................................................................................................................................13
5.1.2 Mounting the Combiner Box.................................................................................................................................................................................... 14
5.2 Drilling Template for Mounting................................................................................................................................................................17
6 Electrical Connection ............................................................................................................................. 18
6.1 Connection Instructions...............................................................................................................................................................................18
6.2 Safety during Electrical Connection .......................................................................................................................................................19
6.3 Inserting the Cables into the Switch Cabinet .....................................................................................................................................19
6.3.1 DC-CMB-U15-16 ........................................................................................................................................................................................................... 19
6.3.2 Overview of the Connection Area DC-CMB-U15-16...................................................................................................................................... 20
6.3.3 Inserting the Cables into the Switch Cabinet DC-CMB-U15-24................................................................................................................... 21
6.3.4 Overview of the Connection Area DC-CMB-U15-24..................................................................................................................................... 22
6.3.5 Inserting the Cables into the Switch Cabinet DC-CMB-U15-32.................................................................................................................. 23
6.3.6 Overview of the Connection Area DC-CMB-U15-32 ..................................................................................................................................... 24
6.4 Leading the Cables through the Cable Glands with sealing Gasket .........................................................................................25
6.5 Connecting the String Cables .................................................................................................................................................................25
6.5.1 Cable requirements: .................................................................................................................................................................................................. 25
6.6 Connecting the DC Main Cables ...........................................................................................................................................................25
6.6.1 Cable Requirements .................................................................................................................................................................................................. 25
6.7 Assembly of the Connection ..................................................................................................................................................................26
6.7.1 Two Terminal Lugs ................................................................................................................................................................................................... 26
6.7.2 One Terminal Lug...................................................................................................................................................................................................... 26
6.7.3 Connection procedure: ............................................................................................................................................................................................ 27
6.8 Connecting the Grounding Cable ..........................................................................................................................................................27
7 Commissioning ......................................................................................................................................28
7.1 Safety during Commissioning...................................................................................................................................................................28
7.2 Commissioning the Combiner Box.........................................................................................................................................................28
7.2.1 Requirements for Commissioning .......................................................................................................................................................................... 28
7.3 Voltage Check – Measuring Procedure ..................................................................................................................................................28
8 Maintenance......................................................................................................................................... 30
8.1 Periodic Maintenance..................................................................................................................................................................................30
8.2 Extraordinary Maintenance......................................................................................................................................................................30
9 Disconnecting......................................................................................................................................... 31
10 Decommissioning ................................................................................................................................32
10.1 Disassembling the Combiner Box..........................................................................................................................................................32
10.2 Disposing of the Combiner Box ............................................................................................................................................................ 32
11 Technical Data......................................................................................................................................33
12 Contact ................................................................................................................................................. 34
