Sungrow SG20KTL User Manual

6 Electrical Connection User Manual
32
6.3.2 Connecting Inverter to AC Grid
Danger to human life due to high voltage existing inside the inverter!
y Make sure that all the AC cables to the inverter are not live before the
electrical work.
y Do not turn on the AC side circuit breaker until all inverter electrical
connections are completed.
Prior to connecting to the utility grid, verify whether the grid voltage and frequency
are within the range of inverter output parameters, referred to “Appendix”. Consult
local grid company for solution, if otherwise.
Connect the inverter exclusively to TN or TT mains as the following procedures:
Connecting SG10KTL/SG12KTL/SG15KTL to AC Grid
Step 1 Unscrew the water-proof terminal in the
following direction.
Step 2 Insert appropriate size AC cables into the
water-proof terminal.
Step 3 Strip off insulation layer of all AC cables.
The length of strip insulation is
approximately 5mm.
Step 4 Fix all cables ends to the corresponding
terminals with the torque of 1 Nm
according to markings on the connector,
especially “PE” cable. If a phase wire is
connected to the “PE” terminal, it may
permanently destroy the inverter.
Step 5 Pull cables outwards to confirm whether they are installed firmly.
Step 6 Combine the two front-end parts together with the torque of 2 Nm.
Step 7 Tighten the water-proof terminal with the torque of 5 Nm in opposite
directions.
Step 8 Make sure the AC and DC circuit breaker are disconnected.
Step 9 Connect phase cables and “N” cable to AC circuit breaker.

Sungrow SG20KTL Specifications

General

Model	SG20KTL
Type	String Inverter
Rated Output Power	20 kW
Max. DC Input Power	30 kW
Max. DC Input Voltage	1100 V
Start Voltage	200 V
Number of MPPTs	2
Max DC Input Current per MPPT	26 A
Max. Input Current per MPPT	26 A
Rated AC Power	20 kW
Rated AC Voltage	400 V
AC Voltage Range	310 V - 480 V
Rated Grid Voltage	400 V
Rated Grid Frequency	50 Hz / 60 Hz
Total Harmonic Distortion	< 3%
Power Factor at Rated Power	1
Adjustable Power Factor Range	0.8 leading - 0.8 lagging
Max. Efficiency	98.6%
European Efficiency	98.4%
Efficiency	98.6%
DC Switch	Yes
Protection Class	IP65
Cooling Concept	Natural Cooling
Max. DC Power	22000 W
Max. AC Power	22 kW
Grid Frequency	50/60 Hz
Operating Temperature Range	-25 °C ~ +60 °C
Input Voltage Range	200 V - 1000 V