11
Installation Manual
SMA Solar Technology AG
DC-CMB-IA-U15-xx-en
4 Product Description
Symbols on the Type Label
Symbol
Explanation
Danger to life due to high 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 documentation supplied with the product.
CE marking.
The product complies with the requirements of the applicable EU directives.
WEEE designation.
Do not dispose of the product together with the household waste but in accordance with
the locally applicable disposal regulations for electronic waste.
4.3 DC Load-Break Switch
The Combiner Box can be disconnected on the inverter side by means of a DC load-break switch. The use of the
DC load-break switch is only permissible if LV/HRC fuses with gPV characteristic are installed upstream in the inverter or
main DC distribution box.
4.4 Suggestion on fuse choosing
Derating Combiner Fuse
Ambient temperature => Current derating
<= +40° reduction factor of 0.6
> +40° up to +55° reduction factor of 0.55
The following applies
I
NOM FUSE
≥ ISC_STC / Reduction factor
