Sungrow SG50CX User Manual

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8
System Decommissioning
8.1 Disconnecting Inverter
Danger of burns!
Even if the inverter is shut down, it may still be hot and cause burns. Wear protec-
tive gloves before operating the inverter after it cools down.
For maintenance or other service work, the inverter must be switched off.
Proceed as follows to disconnect the inverter from the AC and DC power sources. Lethal
voltages or damage to the inverter will follow if otherwise.
Step 1 Disconnect the external AC circuit breaker and prevent it from inadvertent reconnection.
Step 2 Rotate the DC switch(if there is) to the "OFF" position for disconnecting all of the PV string
inputs.
Step 3 Wait about 5 minutes until the capacitors inside the inverter completely discharge.
Step 4 Ensure that the DC cable is current-free with a current clamp.
- - End
8.2 Dismantling the Inverter
Risk of burn injuries and electric shock!
After the inverter is powered off for 5 minutes, measure the voltage and current
with professional instrument. Only when there is no voltage nor current can opera-
tors who wear protective equipment operate and maintain the inverter.
• Before dismantling the inverter, disconnect the inverter from both AC and DC
power sources.
• If there are more than two layers of inverter DC terminals, dismantle the outer
DC connectors before dismantling the inner ones.
• If the original packing materials are available, put the inverter inside them and
then seal them using adhesive tape. If the original packing materials are not
available, put the inverter inside a cardboard box suitable for the weight and
size of this inverter and seal it properly.

Sungrow SG50CX Specifications

General

Max. DC Voltage	1100 V
MPPT Voltage Range	200 V - 1000 V
Max. Input Current per MPPT	26 A
Number of MPPTs	4
Rated AC Output Power	50 kW
Max. AC Output Current	76 A
Frequency	50 Hz / 60 Hz
Efficiency	98.6%
Start Voltage	200 V
Number of DC Inputs per MPPT	2
Max. AC Apparent Power	55 kVA
AC Voltage Range	310 V - 480 V
Power Factor at Rated Power	1
Adjustable Power Factor Range	0.8 leading - 0.8 lagging
THDi	< 3%
DC Switch	Yes
AC Surge Protection	Type II
DC Surge Protection	Type II
Protection Class	I
Cooling Method	Smart forced air cooling
Protection Degree	IP66
Protection Level	IP66
Operating Temperature Range	-25°C to +60°C
Humidity	0-100%
AC Output Voltage	3 / N / PE, 220 V / 380 V, 230 V / 400 V