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5.5.5 Use of string fuses
When connecting one or two module strings per DC input, no
string fuses are required.
+
–
DC 1
DC 2
DC 3
DC 4
DC 5
DC 6
1
Fig. 5.25:
Connection of one or two module strings per DC
input (= MPP tracker): no string fuses necessary
Installation and operation manual M70A_260 Flex RPI703M26000 EU V1.1 EN 2022-08-02
+
–
2
3
5 Planning the installation
Planning the connection of the solar modules (DC)
In principle, string fuses should be used when there are three
module strings per DC input.
+
–
DC 1
DC 1
DC 2
DC 2
DC 3
DC 3
DC 4
DC 4
DC 5
DC 5
DC 6
DC 6
1
1
Fig. 5.26:
Connection of three module strings per DC input (=
MPP tracker): string fuses recommended
Note that no string fuses are installed in the
inverter! Suitable string fuses withs are available
as accessories from Delta. These string fuses
are integrated into the DC cable.
Should you require this, please contact Delta
Support by telephone. You can find the contact
information on the last page of this manual.
When selecting protective devices (such as
string fuses), always cater for the maximum cur-
rent rating of the solar modules.
+
–
+
–
2
2
3
3
45
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