Delta PhotoVoltaic RPI-C500 User manual

PhotoVoltaic Inverter
RPI-C500 PV Inverter

TABLE OF CONTENTS
INSTALLATION REFERENCE
I
TABLE OF CONTENTS
1. Introduction ................................................................. 1
1.1. About This Manual .............................................................................................................. 1
1.2. Valid Models........................................................................................................................... 1
1.3. Target Group.......................................................................................................................... 1
2. Safety ......................................................................... 2
2.1. System Usage....................................................................................................................... 2
2.2. Disconnecting ....................................................................................................................... 2
3. Product Overview .......................................................... 4
3.1. Product Description ............................................................................................................ 4
3.2. Product View ......................................................................................................................... 4
3.2.1. Exterior Front View................................................................................................. 4
3.2.2. Exterior Triangle View............................................................................................ 5
3.3. Features .................................................................................................................................. 6
3.4. Identify the Inverter .......................................................................................................... 6
4. Transportation & Installation Preparation .......................... 8
4.1. Installation Site Requirements....................................................................................... 8
4.1.1. Site Space .................................................................................................................. 8
4.2. Preparing the Installation Site ....................................................................................... 9
4.2.1. Dimensions of trench............................................................................................. 9
4.2.2. Dimensions & Characteristics of the base ..................................................... 9
4.2.3. Fixed Methods.........................................................................................................10
4.2.4. Dimensions of central inverter for indoor installation............................. 10
4.3. Delivery Options and Recommended Vehicle .........................................................11
4.3.1. Using a Forklift or pallet trunk ......................................................................... 12
4.3.2. Using a Crane ......................................................................................................... 12
4.4. Unpacking ............................................................................................................................ 15

TABLE OF CONTENTS
INSTALLATION REFERENCE
II
4.5. Package Contents.............................................................................................................. 16
5. Installation................................................................. 17
5.1. Recommended Tools.........................................................................................................17
5.2. DC Connection....................................................................................................................17
5.2.1. Dimension of DC Busbar ........................................................................................ 19
5.2.2. Choose Input DC Fuse and Cable Size..........................................................21
5.2.3. Positive/Negative Grounding.............................................................................21
5.3. AC Connection ....................................................................................................................22
5.3.1. Dimension of AC Busbar.........................................................................................24
5.4. PE Connection..................................................................................................................... 26
5.4.1. Dimension of PE Busbar ......................................................................................... 27
5.5. DC Fuse Installation.........................................................................................................28
5.6. Attach/Remove the Plates .............................................................................................29
5.7. Connection of Communication Modules ...................................................................30
5.7.1. RS-485 Connection...............................................................................................30
5.7.2. Dry Contact Connection...................................................................................... 31
5.8. Auxiliary Power from External Source....................................................................... 32
5.9. First Time Powering Up ...................................................................................................34
5.9.1. Before Powering Up .............................................................................................. 34
5.9.2. Powering Up the Inverter and Self-test........................................................ 34
5.10. Active/Reactive Power Control and Fault Ride Through ..................................36
5.10.1. Active Power Control .........................................................................................36
5.10.1.1. Power Limit................................................................................................36
5.10.1.2. Power vs. Frequency..............................................................................36
5.10.2. Reactive Power Control .................................................................................... 37
5.10.2.1. Fixed Active Factor cosφ......................................................................37
5.10.2.2. Active Factor cosφ(P)............................................................................37
5.10.2.3. Fixed Reactive Power ............................................................................38
5.10.2.4. Reactive Power/Voltage Characteristic Q(U)................................ 38

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INSTALLATION REFERENCE
III
5.10.3. Fault Ride Through (FRT) ................................................................................ 38
5.11. LCD Flowchart .................................................................................................................. 40
5.11.1. Home Page ............................................................................................................40
5.11.2. Power Meter ..........................................................................................................41
5.11.3. Energy Log ............................................................................................................ 41
5.11.4. Event Log............................................................................................................... 42
5.11.5. Operation Data .................................................................................................... 43
5.11.6. Inverter Information.......................................................................................... 44
5.11.7. Settings ..................................................................................................................44
5.11.7.1. Personal Settings..................................................................................... 45
5.11.7.2. Coefficient Settings ................................................................................45
5.11.7.3. Install Settings......................................................................................... 46
5.11.7.4. Active/Reactive Power Control ................................................................. 49
5.11.7.4.1. Power Limit .............................................................................................. 49
5.11.7.4.2. Power vs. Frequency.............................................................................. 50
5.11.7.4.3. Constant cosφ.........................................................................................50
5.11.7.4.4. cosφ(P).................................................................................................... 50
5.11.7.4.5. Constant Reactive Power.......................................................................51
5.11.7.4.6. Q(U) .......................................................................................................... 51
5.11.7.5. FRT (Fault ride through)............................................................................ 52
6. Troubleshooting .......................................................... 53
6.1. Measurement Index .........................................................................................................53
6.2. Error Message and Trouble-shooting ......................................................................... 57
7. Maintenance ............................................................... 62
7.1. Replacing a Fan Module ..................................................................................................62
7.2. Replacing an Air Filter .....................................................................................................65
7.3. Clean Air Outlets ............................................................................................................... 67
7.4. Replacing DC Fuses.......................................................................................................... 69

TABLE OF CONTENTS
INSTALLATION REFERENCE
IV
7.5. Replacing Surge Protection Device (SPD) ............................................................... 70
Appendix A. Technical Data ......................................... 72
Appendix B. Cable Combination Table & Hole Size of plate 76
Appendix C. Delta MV Transformer and Auxiliary Power
transformer Application Note ............................................. 77
Appendix D. Contact Information .................................. 81

CONVENTIONS
INSTALLATION REFERENCE
IV
Conventions
General Conventions
The following conventions are used in this manual:
Example:
Indicates information used to demonstrate or explain an associated concept.
Note:
Indicates additional information that is relevant to the current process or procedure.
WARNING!
Warning information appears before the text it references to emphasize that the content
may prevent damage to the device or equipment.
CAUTION!
CAUTIONS APPEAR BEFORE THE TEXT IT REFERENCES.CAUTIONS APPEAR IN CAPITAL LETTERS TO
EMPHASIZE THAT THE MESSAGE CONTAINS VITAL HEALTH AND SAFETY INFORMATION.
Typographical Conventions
The following typographical conventions are used in this document:
Italics
Indicates denotes references to other titles, directories, files, paths, and/or pro-
grams.
Screen Display width
Indicates computer output shown on a computer screen, including menus,
prompts, responses to input, and error messages.
Bold type
Indicates keyboard keys that are pressed by the user.

INSTALLATION REFERENCE
V
COPYRIGHT
Copyright
The ownership and all intellectual property rights of this Installation Reference (this
“Manual”), including but not limited to the content, data and figures contained herein
are vested by Delta Electronics, Inc. (“Delta”). The Manual can only be applied to
operation or use of the product. Any disposition, duplication, dissemination,
reproduction, modification, translation, extraction or any other usage to the Manual is
prohibited without obtaining Delta’s prior written permission. As the product will be
developed and improved continuously, Delta may modify or update the Manual from
time to time without any notice. Delta will do its best efforts to keep the Manual
updated and maintain the accuracy of the Manual. Delta disclaims any kinds or forms
of warranty, guarantee or undertaking, either expressly or implicitly, including but not
limited to the completeness, accuracy, non-infringement, merchantability or fitness for
particular purpose or usage.
Copyright © 2013 Delta Electronics, Inc. All Rights Reserved.

INTRODUCTION
ABOUT THIS MANUAL
INSTALLATION GUIDE
1
1. Introduction
1.1. About This Manual
This manual provides the detail information of specification, installation procedures
and all related function setting about the RPI-C500 PV Inverter. Installation
technicians must be well-trained and qualified for installing solar system and must
follow all the safety instruction and installation procedures.
1.2. Valid Models
This user manual describes the installation procedures, maintenance, technical data
and safety instruction of the following solar inverter models under Delta brand.
●RPI-C500 PV Inverter
1.3. Target Group
The guidelines in this manual provide instructions for a person who is well training
and skillful for the installation of the central inverter.

INSTALLATION GUIDE
2
SAFETY
SYSTEM USAGE
2. Safety
2.1. System Usage
See the system usage in the following diagram:
Figure 2-1. System Usage
External output transformer requirements
The external output transformer is used with separate primary and secondary
windings rated 500kVA minimum, and limited to a maximum impedance variance of
less than or equal to 6%. This external transformer is required to be located
between the output of the central inverter and the utility power connection.
For the application of MV transformer .Please refer to the Appendix C “ Delta MV
transformer application note”.
2.2. Disconnecting
Isolation of the device must always occur under load-free conditions.
CAUTION!
RISK OF LETHAL ELECTRIC SHOCK.
It is admitted to work on the PV Inverter only after switching the relative power sources.
The VDE regulations must be followed:
Disconnect
Ensure that the device cannot be reconnected
Ensure that no voltage is present
Ground and short-circuit the unit if necessary(not on the DC side)
If necessary, cover or shield any adjacent live components
The following power sources must be isolated:
Grid voltage for grid feeding
Grid voltage for internal power supply (optional)
DC voltage from the photovoltaic generator

INSTALLATION GUIDE
3
SAFETY
DISCONNECTING
Simply switching off the main AC and DC switches is not sufficient to ensure proper
isolation of the device. The main switches only separate the power circuit from the
grid and the photovoltaic generator.
CAUTION!
RISK OF LETHAL ELECTRIC SHOCK.
Dangerous accidental-contact voltages can be present in the PV Inverter even when the
main AC and DC switches are switched off!
Wait at least 5 minutes after switching off the PV Inverter.
The DC voltage is isolated using the internal or external DC input fuses, or using an
external circuit breaker if present. Isolation by removing the DC input fuses must
occur under load-free conditions.
The device contains capacitors on the AC and DC sides that must discharge once the
device has been switched off. After switching off, dangerous accidental-contact volt-
ages remain within the device for several minutes. If there is a fault in the device,
these voltages may also be present for a longer period of time. Wait at least 5
minutes after switching off the device before opening the device.
CAUTION!
RISK OF LETHAL ELECTRIC SHOCK.
Dangerous accidental-contact voltages can be present in the PV Inverter even when the
main AC and DC switches are switched off!
Wait at least 5 minutes after switching off the PV Inverter.

PRODUCT OVERVIEW
PRODUCT DESCRIPTION
INSTALLATION MANUAL
4
3. Product Overview
3.1. Product Description
The Delta RPI inverter models include the RPI-C500. It is manufactured to meet high
standards of quality and to maximize the yield of every solar plant (up to 98.7%
efficiency).
The RPI series include a IP-65 protection level enclosure and corrosion resistant
features to ensure the protection of the inverter within an indoor or outdoor
environment.
3.2. Product View
3.2.1. Exterior Front View
Figure 3-1. Exterior Front View
Air Outlets
Emergency
Power Off (EPO)
LCD/LED
Display Buttons

INSTALLATION MANUAL
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PRODUCT OVERVIEW
INTERIOR FRONT VIEW
3.2.2. Exterior Triangle View
Figure 3-2. Exterior Rear View
Air Filter

INSTALLATION MANUAL
6
PRODUCT OVERVIEW
FEATURES
3.3. Features
The following are important features of the product(s) described in this manual:
●High efficiency, peak 98.7%, EUR 98.4%
●3 Phase (3 Lines + PE) 500kVA solar inverter
●Wide input range (420-1000Vdc)
●Wide MPPT range (450-820Vdc)
●1 MPP Trackers
●5” Graphic LCD display (Adjustable contrast & brightness)
●IP-65 protective level (electrics)
3.4. Identify the Inverter
Please refer to the following image for identifying the inverter.
Figure 3-3. Inverter Identification

TRANSPORTATION & INSTALLATION PREPARATION
INSTALLATION SITE REQUIREMENTS
INSTALLATION GUIDE
8
4. Transportation&
Installation Preparation
4.1. Installation Site Requirements
4.1.1. Site Space
Make sure the room for system loading and the destination installation site meet the
space requirements described in this section.
Figure 4-1. Inverter Space Requirements
The loading site should provide enough space to unpack the entire system and
release the container. See the following dimensions:
●Full height of the system package on shipping pallet: 2210 mm (87 inches)
●Width of the system package, front: 1820 mm (72 inches)
●Length of the shipping pallet: 1090 mm (43 inches)
●Width of the system: 1600 mm (63 inches)
●Height of the system: 1950 mm (77 inches)
●Depth of the system: 800 mm (31 inches)
Note:
1. The ambient temperature range of installation site must be less than 60°C.
2. Direct solar irradiation reduces the output power of the central inverter.

INSTALLATION GUIDE
9
TRANSPORTATION & INSTALLATION PREPARATION
PREPARING THE INSTALLATION SITE
4.2. Preparing the Installation Site
Prior to unpacking the system, make sure that you read and understand all environ-
mental and space requirements.
4.2.1. Dimensions of trench
Prepare a trench for laying cables from DC and AC distribution box safely. The
suggested width of trench is 250mm (shaded area in Figure 4-2) and the suggested
depth is depended on user.
Figure 4-2. Trench Dimensions
4.2.2. Dimensions & Characteristics of the base
Build an installation base using the dimensions from the following illustration.
The width and depth of the mental base should not be smaller than the inverter, and
make sure the base can hold at least the weight of the inverter.
Figure 4-3. Installation Base Dimensions
Unit: mm
Unit: mm
Mounting Hole

INSTALLATION GUIDE
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TRANSPORTATION & INSTALLATION PREPARATION
FIXED METHODS
4.2.3. Fixed Methods
You can install the inverter:
1. Install on the ground directly.
2. Install on the base mounted on the ground.
Front Rear Front Rear
Base Trench
Figure 4-4. Fixed Methods
4.2.4. Dimensions of central inverter for indoor
installation
If the inverter installed indoor, the hot air after cooling the inverter can be conducted
to outdoor by ventilation duct with one end directly fixed on the top of inverter.
The following dimension (Figure 4-5 & Figure 4-6) you may require under such
construction.
Figure 4-5. Dimensions without top cover
Unit: mm

INSTALLATION GUIDE
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TRANSPORTATION & INSTALLATION PREPARATION
USING A FORKLIFT ORPALLET TRUNK
Figure 4-6. Internal air outlet dimensions (top view)
4.3. Delivery Options and
Recommended Vehicle
Any equipment used for the transport of the central inverter must be suitable for the
weight of the central inverter. The following equipment can be used for the transport
of the central inverter:
●Forklift or pallet trunk (Recommended)
●Crane
●Hoisting steel cables
●Hoisting hooks
●Steel rings
Internal Air Outlet
Unit: mm

INSTALLATION GUIDE
12
TRANSPORTATION & INSTALLATION PREPARATION
USING A CRANE
4.3.1. Using a Forklift or pallet trunk
The method of moving the central inverter by using a forklift or pallet trunk is the same
whether the unit is packed in a shipping crate or not. Follow these steps:
1. Place the forks of the forklift or pallet trunk under the unit and pay attention to
the center of gravity of the unit.
Figure 4-7. Moving the Central Inverter
2. Lift the unit and move to the installation site directly.
4.3.2. Using a Crane
The method of moving the central inverter by using a crane is different if the unit is
packed or unpacked in a shipping crate. Follow these steps respectively:
If the unit is packed in a shipping crate:
1. Use wire rope to secure the inverter, and make sure that it is evenly weighted.
2. Lift up the inverter and transfer to the installation site steadily.
3. Unraveled the wire rope.
Figure 4-8. Using the Wire Rope

INSTALLATION GUIDE
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TRANSPORTATION & INSTALLATION PREPARATION
USING A CRANE
If the unit is unpacked in a shipping crate:
1. Open the front and back door of the central inverter.
2. Loosen the screws on the top cover.
Figure 4-9. Loosen the Screws on the Top Cover
3. Remove the top cover of the inverter.
Figure 4-10. Removing the Inverter’s Top Cover

INSTALLATION GUIDE
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TRANSPORTATION & INSTALLATION PREPARATION
USING A CRANE
4. Attach the hoisting hooks and cables to the steel rings on the inverter.
Figure 4-11. Attaching the Hoisting Cables
5. Attach the crane hook to the steel ring on the hoisting cables.
6. Lift up the inverter and transfer to the installation site steadily.
7. Remove the hoisting cables.
Crane Hook
Hoisting Hook
Steel Ring