Sungrow SG125CX-P2 User Manual

User Manual 5 Electrical Connection
recommended that the total number of inverters that are connected to the grid not exceed
25.
• The transformer must be protected against overloading and short circuit.
• The transformer is an important part of grid-connected PV generation system. The fault
tolerance capacity of the transformer should be taken into account at all times. The fault
include: system short circuit, grounding fault, voltage drop, etc.
• Take ambient temperature, relative humidity, altitude, air quality, and other environmental
conditions into account when selecting and installing the transformer.
• When the anti-PID function is enabled, observe the following items:
- If the LV side winding is in Y shape, neutral point grounding is prohibited.
- Surge protective devices (SPD) for the AC combiner box and on the LV side of the
transformer are recommended to be connected in the "3+1" manner, as shown in the
figure below. The Min. continuous operating voltages of M1-M4 are 690VAC.
- The LV side winding of the transformer, AC cables, and secondary devices (includ
ing protective relay, detection and measurement instruments, and related auxiliary de
vices) must withstand the voltage to ground of at least 906 V.
5.6.2 Requirements for OT/DT Terminal
OT/DT terminals (not included in the delivery scope) are required for fixing AC cables to the
terminal block. Purchase the OT/DT terminals according to the following requirements.
OT/DT Terminals of Phase Wire
• Specification: M12
47

Sungrow SG125CX-P2 Specifications

General

Max. DC Voltage	1100 V
Rated AC Power	125 kW
Max. DC Power	150 kW
Start-up Voltage	200 V
MPPT Voltage Range	200 V - 1000 V
Max. Short-circuit Current per MPPT	40 A
Max. AC Power	137.5 kW
Max. AC Current	198 A
Rated AC Voltage	400 V
Rated Grid Frequency	50/60 Hz
Total Harmonic Distortion	<3%
Power Factor Adjustment Range	0.8 leading to 0.8 lagging
DC Connection Type	MC4
Protection Class	IP66
Maximum DC Input Power	150 kW
DC Inputs per MPPT	2
Cooling Method	Smart forced air cooling
Operating Temperature Range	-25°C to +60°C
Humidity Range	0 - 100%
Communication	RS485, Ethernet