Installing Dc Input Power Cables - Huawei SUN2000-33KTL-US Quick Manual

5.6

Installing DC Input Power Cables

Selecting DC Input Terminals
NOTE
The SUN2000 provides two DC switches,
namely, DC SWITCH 1 and DC SWITCH
2. DC SWITCH 1 controls the first to
fourth routes of DC input terminals,
whereas DC SWITCH 2 controls the fifth
to eighth routes of DC input terminals.
Positive and Negative Metal Terminals
Positive metal terminal (female)
Negative metal terminal (male)
WARNING
Ensure that the PV module output 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 1000 V using a
multimeter and that the cables are connected correctly. Otherwise, the SUN2000 will be damaged.
− If the voltage is a negative value, the PV string is reversely connected. Correct the polarity.
− If the voltage is greater than 1000 V DC, too many PV modules are configured. Remove some
PV modules.
NOTICE
1. Use the positive and negative metal terminals and DC connectors supplied with the SUN2000. Using
other models of positive and negative metal terminals and DC connectors may result in serious
consequences. The caused device damage is not covered under any warranty or service agreement.
2. 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.
3. 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.
4. Connect the positive and negative connectors to the appropriate positive and negative DC input
terminals. Then pull back the DC input power cables to ensure that they are connected securely.
5. If the DC input power cable is reversely connected, do not operate the DC switches and positive
and negative connectors immediately. Otherwise, the SUN2000 will be damaged. The caused
equipment damage is beyond the warranty scope. Wait until the solar irradiance declines at night
and the PV string current reduces to below 0.5 A. Then, turn off the two DC switches, remove the
positive and negative connectors, and correct the polarity of the DC input power cable.
Number
SUN2000
of Inputs
1 Connects to any route.
2 Connects to routes 1 and 5.
3 Connects to routes 1, 3, and 5.
4 Connects to routes 1, 3, 5, and 7.
5 Connects to routes 1, 2, 3, 5, and 7.
6 Connects to routes 1, 2, 3, 5, 6, and 7.
Connects to routes 1, 2, 3, 4, 5, 6,
7
and 7.
Connects to routes 1, 2, 3, 4, 5, 6, 7,
8
and 8.
10