Huawei SUN2000-25KTL-US Quick Installation Manual page 11

1. Use the positive and negative metal contacts and DC connectors supplied with the SUN2000. Using
other models of positive and negative metal contacts and DC connectors may result in serious
consequences. The caused device damage 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), H4TC0002 (Amphenol), PV-CZM-22100 (Staubli), or PV-
CZM-19100 (Staubli). When choosing PV-CZM-22100 or PV-CZM-19100, do not use the locator.
Otherwise, metal contacts would be damaged.
3. Before connecting DC input power cables, mark the polarities on the cables to ensure that the
cables are connected correctly. If the cables are connected incorrectly, the device 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 back 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 DC input power cables to ensure that they are connected securely.
6. If the DC input power cables are reversely connected and the DC SWITCH is ON, do not turn off
the DC SWITCH immediately. Otherwise, the inverter may be damaged and the damage is
beyond the warranty scope. Wait until the PV string voltage reduces to the safety range (below
60 V DC). Then, turn off the DC SWITCH, remove the positive and negative connectors, and
rectify the connection.
Installing a DC input power cable (using metal cold forming contacts)
Positive metal contact
Negative metal contact
Common PV cables with a
cross-sectional area of 12
AWG are recommended.
Ensure that cables cannot
be removed after crimped.
Ensure that the
cables are correctly
connected and the
voltage does not
exceed 1000 V.
10
Positive connector
Negative
connector
Click
Ensure that the
locking nut is
secured.