Huawei SUN2000-50KTL-M0 Quick Manual page 12

1. Use the Amphenol Helios H4 PV connectors provided with the SUN2000. If the terminals are
lost or damaged, purchase the PV connectors of the same model. The device damaged
caused by incompatible PV connectors is not covered under any warranty or service
agreement.
2. The metal contacts supplied with the DC connectors are either cold forming contacts or
stamping forming contacts. Crimp the metal cold forming contacts using crimping tool
UTXTC0005 (Amphenol, recommended) or H4TC0001 (Amphenol). Crimp the metal stamping
forming contacts using crimping tool H4TC0003 (Amphenol, recommended) or H4TC0002
(Amphenol). Choose the crimping tools that fit the metal contacts.
3. Before connecting DC input power cables, label the cable polarities to ensure correct cable
connections. If the cables are connected incorrectly, the SUN2000 may be damaged.
4. Insert the crimped metal terminals of the positive and negative power cables into the
appropriate positive and negative connectors. Then pull the DC input power cables to ensure
that they are connected securely.
5. Connect the positive and negative connectors to the appropriate positive and negative DC
input terminals. Then pull the DC input power cables to ensure that they are connected
securely.
6. If polarity of the DC input power cable is reversed and the DC switch is ON, do not turn off the
DC switch immediately or unplug positive and negative connectors. The device may be
damaged if you do not follow the instruction. The caused equipment damage is beyond the
warranty scope. Wait until the solar irradiance declines and the PV string current reduces to
below 0.5 A, and then turn off the two DC switches and remove the positive and negative
connectors. Correct the string polarity before reconnecting the string to the SUN2000.
Installing a DC Input Power Cable (Using Metal Cold Forming Contacts)
Positive metal contact
Negative metal contact
Recommended: PV cable
that meets the 1100 V
standard.
UTXTC0005
(Amphenol)
Ensure that the cable
cannot be removed after
crimped.
Click
Use a multimeter
to measure the
DC voltage.
11
Positive connector
Negative
connector
Click
Ensure that
the locking
nut is
secured.
H4TW0001
(Amphenol)