Installing Dc Input Power Cables - Huawei SUN2000-45KTL-US-HV-D0 Quick Manual

5.4

Installing DC Input Power Cables

Selecting DC Input Terminals
Number of Inputs
1
2
3
4
5
6
7
8
Ensure that the PV string is well insulated to ground.

Before inserting the positive and negative connectors respectively into the positive and

negative DC input terminals of the SUN2000, check that the DC voltage does not exceed
1500 V using a multimeter and that the cables are connected correctly. Otherwise, the
SUN2000 will be damaged.
1. Use the Amphenol HH4 DC input terminals provided with the SUN2000.
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 H4TC0001 (Amphenol).
Crimp the metal cold stamping contacts using crimping tool H4TC0002 (Amphenol). Choose the
crimping tools that fit the metal contact types. Do not mix up the tools.
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.
SUN2000
Connects to set 1.
Connects to sets 1 and 5.
Connects to sets 1, 3, and 5.
Connects to sets 1, 3, 5, and 7.
Connects to sets 1, 2, 3, 5, and 7.
Connects to sets 1, 2, 3, 5, 6, and 7.
Connects to sets 1, 2, 3, 4, 5, 6, and 7.
Connects to sets 1, 2, 3, 4, 5, 6, 7, and 8.
The SUN2000 provides two DC switches,
named as, DC SWITCH 1 and DC
SWITCH 2. DC SWITCH 1 controls the
first to fourth sets of DC input terminals,
whereas DC SWITCH 2 controls the fifth to
eighth sets of DC input terminals.
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