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4.4
Installing DC Input Power Cables
Selecting DC input terminals
Number of Inputs
1
2
3
4
5
6
7
8
•
Ensure that the PV 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 inverter, check that the DC voltage does not exceed 1100 V DC using
a multimeter and that the cables are connected correctly. Otherwise, the inverter will be
damaged.
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) or H4TC0001 (Amphenol). Crimp the metal stamping forming contacts
using crimping tool H4TC0003 (Amphenol) 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 inverter may be damaged.
4. Insert the crimped metal contacts 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 the DC input power cables to ensure that they are connected securely.
6. 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 rectify the connection of the DC input power
cable.
SUN2000
Connects to any route.
Connects to routes 1 and 5.
Connects to routes 1, 3, and 5.
Connects to routes 1, 3, 5, and 7.
Connects to routes 1, 2, 3, 5, and 7.
Connects to routes 1, 2, 3, 5, 6, and 7.
Connects to routes 1, 2, 3, 4, 5, 6, and 7.
Connects to routes 1, 2, 3, 4, 5, 6, 7, and 8.
The inverter provides two DC switches, namely,
DC SWITCH 1 and DC SWITCH 2. DC
SWITCH 1 controls the first to the fourth routes
of DC input terminals, while DC SWITCH 2
controls the fifth to the eighth routes of DC
input terminals.
8
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