Sunways STT Series, User Manual

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2.DC connector assembly procedure
① Select the appropriate photovoltaic cable:
Cable type Traverse area (mm²)
General photovoltaic
cable
Range (mm
2
) Recommended value (mm
2
)
2.5-4.0 4.0
Figure 4-10
② Peel off the DC cable insulation sleeve for 7 mm, as shown in Figure 4-10:
Wire Traverse area 2.5-4mm
2
7mm
③ Disassemble the connector in the accessory bag, as shown in Figure 4-11:
④ Insert the DC cable through the DC connector nut into the metal terminal and press the
terminal with a professional crimping plier (pull back the cable with some power to check if
the terminal is well connected to the cable), as shown in Figure 4-12:
Figure 4-11
+
-
※ 4.4 Electrical Connection
Danger
A high voltage in the conductive part of the inverter may cause an electric shock. When
installing the inverter, make sure that the AC and DC sides of the inverter are completely
de-energized.
Warning
Do not ground the positive or negative pole of the PV string, otherwise it will cause
serious damage to the inverter.
Warning
Static may cause damage to the electronic components of the inverter. Anti- static
measures should be taken during installation and maintenance.
Attention
Do not use other brands or other types of terminals other than the terminals in the
accessory package. Sunways has the right to refuse all damages caused by the mixed-
use of terminals.
Attention
Moisture and dust can damage the inverter, ensure the cable gland is securely tightened
during installation. The warranty claim will be invalidated if the inverter is damaged as a
result of a poorly connected cable connector.
1. The following must be considered when making electrical connections to the inverter:
① Disconnect the AC breaker switch on the grid side.
② The DC switch of the inverter must be turned to the "OFF" position.
③ For best practice, ensure PV modules of the same model and specifications are
connected in each string.
④ Make sure the maximum output voltage of each PV string does not exceed 600V.
4.4.1 Inverter PV string connection
4 Installation 4 Installation