Delta M50A-260 - Use of String Fuses; Specifications for the DC Cables

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5 Planning the installation
Planning the connection of the solar modules (DC)
Installation and Operation Manual M50A_260 RPI503M260000 Product version L and M EU V1.3 EN 2023-08-14
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 2
MPPT
(max. 11,7 kW per MPPT)
+ – + –
Fig. 5.25: Connection of one or two module strings per DC
input (= MPP tracker): no string fuses necessary
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 nd 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.
5.5.6 Specications for the DC cables
The DC plugs for all DC connectors are supplied with the inverter.
The DC plugs are only suitable for copper wire.
You can download the assembly instructions for the DC plugs
from Amphenol at: www.amphenol-solar.com.
If you want to order more or need a di󰀨erent size, see the infor-
mation in the following table.
DC plugs for DC cables
DC connections on the
inverter
DC–
^
DC+
a
b
a b
Amphenol DC plug
1)
mm
2
mm
DC+ 4/6 5.3 ... 7.65 H4CFC4D●S
DC– 4/6 5.3 ... 7.65 H4CMC4D●S
1)
Included in scope of delivery
Fig. 5.26: Specication for the DC cables