Eltek Valere Theia He-t Manuel d'utilisateur Page 21
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User Manual THEIA HE-t String Inverters 357115.013
,
Issue 1.0, 2011 April
21
4.3. Electrical Installation
Correct electrical connection is critical for achieving a safe, long-term and reliable operation
of the entire PV system.
DANGER: Ensure correct electrical connections!
The electrical connections on the AC and DC side must be performed by qualified
persons and comply with local and national electrical regulations and the
instructions detailed in this User Manual.
Basic PV System Overview
Figure 4.3.1: Simplified PV system overview without DC grounding
4.3.1. Conductors
Two important criteria must be considered in the selection of conductor sizes, namely
ampacity and voltage drop. Using correctly sized conductors improves the efficiency of the
PV system.
• Ampacity refers to the current-carrying capacity of the conductor. The larger the conductor
is, the greater its capacity to carry current.
• Voltage drop is the loss of voltage due to cross section, current flow and length of the
conductor. It is recommended to minimize the system conductor voltage losses, as voltage
losses are equal to loss in energy yield.
CAUTION: Avoid overheating and possible fire!
The conductor cross section area and the disconnector ratings must conform to the
ratings required by local and national electrical regulations.
• Use adequately sized conductors with the correct temperature rating and sunlight resistance.
- USER MANUAL 1
- IngBjoNo 2
- Contents 3
- 1. Introduction 4
- 2. Product Overview 5
- 2.3. Symbols Used 6
- 2.4.1. Shipping Damage 8
- 2.4.3. Unpacking 8
- 2.4.4. Scope of Delivery 9
- 2.4.5. Inverter Structure 9
- Figure 2.4.5: Lower cover 10
- 3. Safety Precautions 11
- 3.1.2. Operation 12
- 3.1.3. Maintenance 12
- 3.2. Site Preparations 13
- 3.2.2. Installation 14
- , Issue 1.0, 2011 April 15 15
- 4. Installation 17
- 4.2.1. Wall Bracket 18
- 4.2.2. Inverter 19
- 4.3.1. Conductors 21
- 4.3.2. Connection Area 22
- 357115.013 23
- Issue 1.0, 2011 April 23
- 4.3.3. Grounding 24
- Stringbox 26
- Positive grounded PV String 30
- Negative grounded PV String 30
- Connection Procedures 32
- Reversed DC Connection 32
- Never work with live wires! 33
- 4.3.6. Network Connections 35
- 5. Start Up 38
- 5.2.2. Display 39
- 5.2.3. Function Keys 39
- 5.2.4. Start Installation 40
- 5.3. Self Test for Italy 46
- Voltage Monitoring 47
- Frequency Monitoring 48
- 6. Operation 49
- 6.2.1. Home 50
- 6.2.2. Status 52
- 6.2.3. Setup 53
- Inverter Setup 54
- Grid Setup 54
- Change the Country Settings 55
- 6.2.4. Commands 56
- 6.2.5. Alarm Setup 57
- 6.2.6. Event Log 58
- 6.2.7. Statistics 58
- 6.3.1. Without Network 59
- 6.3.2. With Network 60
- 6.4. Internal Web Server 61
- 7. Troubleshooting 62
- , Issue 1.0, 2011 April 63 63
- , Issue 1.0, 2011 April 65 65
- 8. Maintenance 66
- 8.1.1. Discharge 67
- 8.2.1. Modules 68
- 8.2.2. Cables 68
- 8.2.3. Fixing Points 68
- 8.2.5. DC Fuses 69
- 8.2.7. Inverter 69
- 8.2.8. Fan 70
- 8.2.9. Ventilation 71
- 8.2.10. Varistors (VDR) 71
- 8.3. Replace Devices 73
- 8.4. Return and Disposal 73
- 9. Warranty 74
- 10. Technical Data 75
- 11. Contact Information 77
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