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NOTE
If an external residual current circuit breaker is necessary due to the installation specification, a type A resid-
ual current circuit breaker must be used.
If a residual current circuit breaker B is used, the menu item "Compatibility with type B – RCD" must be en-
abled Configuration via web user interface. This can affect the efficiency somewhat.
If one of these types is used, it must have a protective rating of at least 1250 mA.
For questions regarding the appropriate type, please contact the installer or our KACO new energy customer
service.
4.4
Connecting the PV generator to the device
4.4.1
Recommended standard connection
WARNING
Device damage due to bridged PV string connection to an MPP tracker.
Unused MPP trackers can build up a voltage of 200 V, which is displayed on the web interface. If this is not
desired, the unused MPP tracker can be electrically bridged. (both PV string connections)
›
Distribute all PV strings as evenly as possible across the device.
›
PV strings must be connected individually and selected and activated in the "DC Configuration" menu
item. An improperly configured DC input leads to device damage.
›
Two strings on one MPP tracker must have the same voltage. (U
›
The voltage at the MPP trackers can be different. They are supplied by separate, independently operat-
ing MPP trackers (MPP Tracker 1 / 2).
›
In the following illustrations, two MPP trackers (1 / 2) have been occupied by PV strings by way of ex-
ample. Naturally, this configuration can be transferred to the other MPP trackers (3 / 4; 5 / 6; 7 / 8; 9 /
10) identically.
ž
Menu item: All DC inputs separated
1
1
2-8
(9-10)
n
1
...
...
n
x
...
Fig. 7: Each connection variant possible on individual MPP trackers.
and 1 string on one MPP
tracker
Max. 15 A per plug (max.
30 A per MPP tracker)
Tab. 2: Electrical data of the installation
Page 8
1
1
2-8
(9-10)
n
n
1
2
...
n
n
...
x
x
...
Two strings on one MPP
tracker
Max. 20 A per plug and
tracker
=U
n1-nx
n2- nx
1 1
2-8
(9-10)
(1)
n
1
n
n
1
1
n
x
n
n
x
x
(2)
Two strings via a Y-cable and
one string directly on one
MPP tracker
Max. 10 A per string on the
Y-cable (max. 30 A per MPP
tracker)
/ U
=U
)
n3- nx
n4- nx
1 1
2-8
(9-10)
(1)
(1)
n
n
1
1
n
n
1
1
n
n
x
x
n
n
x
x
(2)
(2)
Two strings via Y-cable on
one MPP tracker
Max. 7.5 A per string on the
Y-cable (max. 30 A per MPP
tracker)
B/ M/ MF/ L
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