String Fuses - Fronius 10.0-3 208-240 Installation Instructions Manual

String Fuses

String Fuses Only applies to device type Fronius Symo 15.0-3 208 and device types Fronius Symo
15.0-3 480 / 20.0-3 480 / 22.7-3 480 / 24.0-3 480 with the "Ecofuse" option:
The use of string fuses in the Fronius Symo provides additional fuse protection for solar
modules.
The maximum short circuit current I
specification of the maximum string fuse value in the module data sheet of the respective
solar module are decisive factors in the protection of the solar module.
The maximum short circuit current I
The string fuse release current can be set to greater than 15 A if required.
If the inverter is being operated with an external string collection box, the DC connector kit
(item numbers 42,0201,4479 and 42,0201,4480) must be used. In this case the solar mod-
ules are externally protected in the string collection box and the metal bolts should be used
in the inverter.
National regulations regarding fuse protection must be observed. The electrician perform-
ing the installation is responsible for choosing the right string fuses.
The inverter is delivered with metal bolts as standard.
DC+ 1.3
DC+ 1.2
NOTE! To prevent a risk of fire, faulty fuses must only be replaced by new equiv-
alent fuses.
Option DC OVP
DC+ 2.1
Do not remove cover! Do not remove cover!
DC+ 1.1
, the maximum module backfeed current I
SC
per terminal is 15 A.
SC
DC+ 2.3 DC- 1.2
DC+ 2.2 DC- 1.1
Each Terminal: I Each Terminal: I
max max
and the
R
= 15 A = 15 A
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