Huawei SUN2000-75KTL Series User Manual page 70

SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual
Number
of PV
Strings
17
19
Wiring Description of Y-branch Connectors
● Y-branch connectors can be purchased from Huawei or the manufacturers
● When connecting cables to recommended Y-branch connectors, ensure that the
● Ensure that the locking nuts of all connectors are tightened.
● Do not bind more than three fuse enclosures together. Otherwise, the fuses and
● Do not place the Y-branch connector harness on the ground. A safe distance
● It is recommended that the Y-branch connectors be connected from the PV
● The DC input terminals of the solar inverter are prone to damage under stress.
Cable connection rules:
1.
2.
Issue 11 (2021-11-10)
Terminal Selection
PV1–PV8, PV10, PV12, and
PV14–PV20
PV1–PV10 and PV12–PV20
NO TICE
based on the following recommended models: If the rated current of the fuse
of the Y-branch connector is 15 A, the recommended model is 904095944
(Luxshare) or A040959443039 (Comlink); if the rated current of the fuse of the
Y-branch connector is 20 A, the recommended model is 904095945 (Luxshare)
or A040959453039 (Comlink).
connectors to be paired match each other and are from the same
manufacturer. Otherwise, the contact resistance of the connectors may exceed
the allowed value. In this case, the connectors may be heated and oxidized,
which may cause faults.
their enclosures may be damaged due to overheating. It is recommended that a
clearance of 10 mm or more be reserved between fuse enclosures. You are
advised not to bind the fuse enclosures with other heat emitting conductors.
must be reserved between the Y-branch connector harness and the ground to
avoid impact caused by water on the ground to the harness.
string side and tied to the PV trackers.
When Y-branch connectors are connected to the solar inverter, bind and secure
the connectors to minimize stress on the DC input terminals. For details, see
Securing Y-Branch Connectors.
The PV+ on the string side must be connected to the PV+ on the SUN2000
side, and the PV– on the string side must be connected to the PV– on the
SUN2000 side.
Preferentially and evenly connect the Y-branch connectors to the MPPTs
controlled by DC SWITCH 2 or DC SWITCH 3.
Copyright © Huawei Technologies Co., Ltd.
5 Electrical Connections
Number Terminal Selection
of PV
Strings
18 PV1–PV8, PV10, and PV12–
PV20
N/A N/A
A
61