Delta AU Series User Manual

2
Table of Contents
1 General safety information 4
1.1 Safety and Advisory symbols 5
1.2 Safety Instructions 6
2 Introduction 7
2.1 System 8
2.2 Data evaluation and communication 8
2.3 Technical structure of the solar inverter 9
2.4 Ambient temperature 10
2.5 Solar inverter PV input DC voltage range 10
2.6 Efficiency 11
2.7 Equipment overview 11
2.8 Inverter type and safety labels 12
3 Installation 15
3.1 Visual inspection 17
3.2 Installation Infomation 17
3.3 Mounting the inverter 18
3.4 Electrical connection 20
3.5 Mounting the inverter 21
4 Electrical connections 22
4.1 General safety 22
4.2 AC vgrid connection
23
4.3 External DC switch 23
4.4 AC circuit breaker requirements 24
4.5 Grounding conductor
24
4.6 Lightning and surge protection 24
4.7 Multiple inverters 24
4.8 PV string considerations 24
4.9 Inverter connections 25
4.9.1 General information 25
4.9.2 PV array string input information 28
4.9.3 Inverter AC output wire connections 30
5 Commissioning the PV system 30
5.1 Status LEDs 31
5.2 LED Indication 31

Delta AU Series Specifications

General

Series	AU Series
Category	Inverter
Cooling Method	Forced Air Cooling
Storage Temperature	-20°C to +60°C
Input Voltage	200-240V
Control Method	V/F Control, Sensorless Vector Control
Protection Features	Overvoltage, Undervoltage, Overcurrent, Short Circuit
Communication Interface	RS485, Modbus
Operating Temperature	-10°C to +50°C
Humidity	5% to 95% RH (Non-condensing)
Altitude	Up to 1000m