3
Installation Manual
SMA Solar Technology AG
DC-CMB-IA-U15-xx-en
2 Table of Contents
Table of Contents
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
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
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
6.7.1 Two Terminal Lugs ................................................................................................................................................................................................... 26
6.7.2 One Terminal Lug ...................................................................................................................................................................................................... 26
6.7.3 Connection procedure: ............................................................................................................................................................................................ 27
