18
19
An AC breaker must be connected on the AC side of the inverter.
Any loads cannot be directly connected to the inverter.
Warning
Figure 4-9
+
-
Crimping Plier
Figure 4-10
Figure 4-11
3) Disassemble the connector in the accessory bag, as shown in Figure 4-9:
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
it’s tight enough), as shown in Figure 4-10:
5) Insert the positive and negative cables into the corresponding positive and negative
connectors, pull back the cable to ensure that the terminal is tightly attached in the connector.
6) Use an open-end wrench to screw the nut to the end to ensure that the terminal is well
sealed, as shown in Figure 4-11:
1.Before assembling the DC connector, make sure that the cable polarity is
correct.
2.Use a multimeter to measure the voltage of the DC input string, verify the
polarity of the DC input cable, and ensure that each string voltage is within
1000V.
Warning
Open-end Wrench
Figure 4-12
Figure 4-13
Model
STT
-4KTL
STT
-5KTL
STT
-6KTL
STT
-8KTL
STT
-10KTL
STT
-12KTL
STT
-15KTL
STT
-17KTL
STT
-20KTL
STT
-25KTL
Copper
Cable
2.5
-10mm
2
2.5
-10mm
2
2.5
-10mm
2
3.2
-10mm
2
4-10mm
2
6-10mm
2
6-10mm
2
8-10mm
2
8-10mm
2
8-10mm
2
Breaker
20A
20A
20A
20A
32A
32A
32A
40A
40A
50A
7) Insert the positive and negative connectors into the inverter DC input terminals respectively,
and a "click" sound represents the assembly in place, as shown in Figure 4-12:
4.3.2 Connection of AC output
The Sunways STT 4-25kW series three phase inverter applies to the three-phase power grid
with a voltage of 230/400V and a frequency of 50/60Hz.
The recommended cable and AC breaker for the Sunways STT 4~25kW series three phase
inverter are shown in the following table:
4.3.2.1 AC connector connection steps
1) Take the AC connector out of the accessory bag and disassemble it, as shown in Figure 4-13:
Cable Gland
Threaded Sleeve
AC Terminal Head
