Delta RPI H3A User manual

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Table of Contents
1
General Information ............................................................ 1
1.1 Scope of delivery ................................................................................ 1
1.2 General Warnings / Notes on Safety .................................................. 1
1.3 Validity ................................................................................................ 2
1.4 Product Description ............................................................................ 2
1. How it Works ...................................................................................... 3
1.6 Additional Information ........................................................................ 3
2 Installation and Wiring ........................................................ 4
2.1 Instruction before Installation ............................................................. 4
2.2 Unpacking .......................................................................................... 4
2.3 Package Inspection ............................................................................
2.4 Identification Label ............................................................................. 6
3 Product Overview ................................................................
3.1 Dimensions ........................................................................................ 7
3.2 Function Introduction .......................................................................... 7
3.2.1 LCD Display and Buttons ............................................................. 8
3.2.2 Inverter Input/Output Interface ..................................................... 8
4 Installation ........................................................................... 9
4.1 Installation Location ........................................................................... 9
4.2 Mounting ............................................................................................ 9
5 Wiring ................................................................................. 12
.1 Preparation before Wiring ................................................................ 12
.2 AC Grid Connection: L + N + PE ................................................... 13
.2.1 Required protective devices and cable cross-sections .............. 14
.3 DC Connection (from PV Array) ....................................................... 1
.4 Communication Module ...................................................................... 16
.4.1 RS-48 Connection ..................................................................... 16
6 Active/Reactive Power Control and LVRT (Optional) ..... 18
6.1 Active Power Control ........................................................................ 18
6.1.1 Power Limit ................................................................................ 18
6.1.2 Power vs. Frequency ................................................................. 18
6.2 Reactive Power Control ................................................................... 19
6.2.1 Fixed Power Factor cosφ (VDE-AR-N 410 ,CEI 0-21) .............. 20
6.2.2 cosφ(P) (VDE-AR-N 410 ,CEI 0-21) ......................................... 20
6.2.3 Fixed Reactive Power InVAR(CEI 0-21) .................................... 20
6.2.4 Reactive Power/ Voltage Characteristic Q(U)(CEI 0-21) ............ 20

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6.3 Low Voltage Ride Through (LVRT) ................................................... 22
Turn PV inverteron/off ....................................................... 23
7.1 Start-up Procedures ......................................................................... 23
7.1.1 PV Array DC Voltage Checking .................................................. 23
7.1.2 AC Utility Voltage Checking ....................................................... 23
7.1.3 Starting up the Inverter ............................................................... 23
7.2 Inverter Setting ................................................................................. 24
7.2.1 Country Setting .......................................................................... 24
7.2.2 Connecting the Communication Wiring ...................................... 24
7.2.3 Inverter ID Setting ...................................................................... 2
7.3 LCD flowchart ................................................................................... 2
7.3.1 Event List ................................................................................... 27
7.3.2 Country Selection....................................................................... 28
7.3.3 Language Selection ................................................................... 29
7.3.4 Insulation Mode ......................................................................... 30
7.3. Time Setting ............................................................................... 30
7.3.6 Settings Page ............................................................................ 31
7.3.7 Italy Self-test&Comando locale .................................................. 31
8 Maintenance ...................................................................... 34
9 MeasurementError Message and Trouble Shooting ....... 35
9.1 Measurement ................................................................................... 3
9.2 Error Message & Trouble Shooting .................................................. 36
10 De-Commissioning ........................................................... 44
11 Technical Data ................................................................... 45
11.1 Specifications ................................................................................... 4
Appendix A ............................................................................... 4
A.1 Multi-function relay output connection ................................................ 47
Appendix B ............................................................................... 48

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Figure
Figure 1-1: Solar system operation illustration ........................................ 3
Figure 2-1: Unpacking process ............................................................ 4
Figure 2-2: The identification label ....................................................... 6
Figure 3-1: Dimensions of RPI H3A/ H4A/ H A ...................................... 7
Figure 3-2: Inverter exterior objects ...................................................... 7
Figure 3-3: LCD display and buttons .................................................... 8
Figure 3-4: Input/output interface ......................................................... 8
Figure 4-1: Attaching the mounting bracket for RPI H3A / H4A / H A ........ 10
Figure 4-2: Correct and incorrect installation illustration ......................... 10
Figure 4-3: Adequate installation gap ................................................. 11
Figure -1: Connection of a system for floating solar array ..................... 12
Figure -2: Connection of a system for solar array grounding .................. 13
Figure -3: AC plug illustration (C01620E0028001, AMPHENOL CORP) ... 14
Figure -4: DC Wiring illustration ....................................................... 16
Figure - : Communication module ................................................... 16
Figure -6: Multi-inverter connection illustration .................................... 17
Figure 6-1: Power vs. frequency characteristic ..................................... 19
Figure 6-2: cosφ(P) characteristic ...................................................... 20
Figure 6-3: Q(U) characteristic .......................................................... 21
Figure 6-4: LVRT characteristic ......................................................... 22
Figure 7-1: Country Setting .............................................................. 24
Figure 7-2: Inverter ID Setting ........................................................... 2
Figure 7-3: LCD flowchart ................................................................ 26
Figure 7-4: Event log flowchart .......................................................... 27
Figure 7- : Country selection ............................................................ 28
Figure 7-6: Language selection ......................................................... 29
Figure 7-7: Insulation mode .............................................................. 30
Figure 7-8: Time settings ................................................................. 30
Figure 7-9: Settings page ................................................................. 31
Figure 7-10: Italy Comando locale ..................................................... 32
Figure 7-11: Italy self-test flowchart .................................................... 33
Figure A-1: Multi-function Relay location ............................................. 47
Figure B-1: Pin assignment at ripple control receiver ............................. 48

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Table
Table 2-1: Packing list
.......................................................................
Table -1: Recommended upstream protection .................................... 14
Table -2: AC wire requirement ......................................................... 14
Table -3: Order Numbers for MC4 connectors .................................... 1
Table -4: Minimum cable size .......................................................... 1
Table - : Definition of RS48 .......................................................... 17
Table -6: RS-48 data format .......................................................... 17
Table 7-1: Country list ..................................................................... 28
Table 7-2: Language list ................................................................... 29
Table 9-1: Measurement and message ............................................... 3
Table 9-2: Error message ................................................................. 36
Table 11-1: Specifications ................................................................. 4

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1 General Information
1.1 Scope of delivery
Congratulations on the purchase of your Delta RPI H3A / H4A / H A grid-tied
solar inverter. This manual assists you in becoming familiar with this product.
Please observe all safety regulations and take into account technical
connection conditions required at your local grid utility.
1.2 General Warnings / Notes on Safety
Careful handling of the product will contribute to service life durability and
reliability. Both are essential to ensure maximum yield from your product. As
some of the solar inverter models are heavy, two people may be required for
lifting purposes.
CAUTION!
During operation of electrical devices, certain parts are under dangerous
voltage.
Inappropriate handling can lead to physical injury and material damage.
Always adhere to the installation regulations. Installation may only be
conducted by certified electricians.
WARNING!
Repair work on the device should ONLY be carried out by the manufacturer.
No user serviceable parts inside.
Please observe all points in the operation and installation manual. Isolate the
device from the grid and the PV modules before undertaking work on the
device.
DANGER!
To avoid risk of electrical shock, do not open the solar inverter. The inverter
contains no user-serviceable parts. Opening the inverter will void the warranty.
Dangerous voltage is present for minutes after disconnecting all sources of
power.

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Remember that the unit has a high leakage current. The PE conductor MUST
be connected prior to commencing operation.
WARNING：BURN HAZARD!
The unit may reach very high temperatures and the device surface can
become quite hot. Sufficient cooling is necessary for optimal yield.
1.3 Validity
This user manual describes the installation process, maintenance, technical
data and safety instructions of the following solar inverter models under the
DELTA brand.
• RPI H3A
• RPI H4A
• RPI H A
1.4 Product Description
This device is a single-phase grid-tie solar inverter. It converts direct current
(DC) electricity from the PV array into single-phase alternating current (AC) to
feed the excess generated power back to the local grid.
This inverter allows for a wide voltage input range (100~ 0VDC) and has a
high performance efficiency and user friendly design and operation. In addition,
the special DSP (Digital Signal Processor) design reduces the complexity of
the circuit and electronic components. Please note that this device does not
support off-grid function. The features for RPI H3A / H4A / H A are shown
below.
Features
• Power Rating: 3kVA (RPI H3A), 4kVA (RPI H4A), kVA (RPI H A)
• Single–phase (L + N + PE), Grid-tie, transformerless solar inverter
• Maximum efficiency: >97. %
• Europe efficiency: 96.8% (RPI H3A) , 97.0%(RPI H4A), 96.8%(RPI H A)
• Reactive power capability (Cap 0.8 – Ind 0.8)
• Total harmonic distortion (THD < 3%) @ full load
• 2 MPP Trackers
• 16×2 monochrome LCD display

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1.5 How it Works
The operation of a solar inverter is shown in Figure 1-1. In order to save
energy and electricity, the solar inverter converts the DC input power supplied
from the PV Array into single-phase AC output power to Grid.
Figure 1-1: Solar system operation illustration
1.6 Additional Information
For more detailed information for RPI H3A/ H4A/ H A or other related product
information, please visit : http://www.deltaww.com.

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2 Installation and Wiring
2.1 Instruction before Installation
Due to the variety of users and installation environments, it is recommended to
read this manual thoroughly before installation. Installation of the unit and
start-up procedures must be carried out by accredited technicians.
2.2 Unpacking
Unpacking process is shown as Figure 2-1.
Figure 2-1: Unpacking process
Upon receiving your brand new RPI inverter, you will be required to remove its
protective packaging. This packaging consists of various materials that will
need to be disposed of according to the specific recycling marking printed on
them. Please note that cardboard may be recycled, whereas polystyrene foam
may not. Please dispose of the packaging materials in a correct manner to
ensure a better environment for us all.

2.3 Package Inspection
Unforeseeable events causing damage or movement may occur during
shipment. Please check for damage on the packaging upon receiving your
inverter.
Please check the model number and the serial number on the packaging is
identical with the model number and serial number on the unit itself.
Check if all the accessories are in the package, the standard accessories are
list as Table 2-1:
Table 2-1: Packing list
RPI H3A / H4A /H A
Object Qty
Description
PV Inverter 1 Solar inverter
User Manual
1
The installation manual is designed to provide
information on safety, installation, technical
specifications and safe operation of the inverter.
AC Plug 1 AC Connector plug
Wall-Mount
Bracket 1 Wall-mount bracket to mount the solar inverter securely on the wall
M4 Screw 2 To fix solar inverter on the bracket
Caution: If there is any visible damage to the inverter/accesories or any
damageto the packaging, please contact your inverter supplier.

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2.4 Identification Label
Users can identify the model number by the information on the product label.
The model number, serial number and other specifications can be located on
the product label. For label location, please refer to Figure 2-2.
Figure 2-2: The identification label

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3 Product Overview
3.1 Dimensions
Figure 3-1: imensions of RPI H3A/ H4A/ H5A
3.2 Function Introduction
The Inverter’s exterior is shown in Figure 3-2. The description for individual
objects can be found in sections 3.2.1 and 3.2.2.
Figure 3-2: Inverter exterior objects

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3.2.1 LCD Display and Buttons
Figure 3-3: LC display and buttons
3.2.2 Inverter Input/Output Interface
Figure 3-4: Input/output interface
Note: The DC switch is only presented in the -120 models. Model series -020
does not have the DC switch.

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4 Installation
4.1 Installation Location
WARNING!
Do not install the unit near or on flammable surfaces.
Please mount the unit tightly on a solid/smooth surface
CAUTION!
The unit should not be installed in direct sunlight.
4.2 Mounting
This unit is designed to be wall-mounted. Please ensure the installation is
perpendicular to the floor and the AC plug located at the base of the unit. Do
not install the device on a slanting wall. The dimensions of the mounting
bracket are shown in the figure below. 8 ofφ. mm screws are required for
the mounting plate(hole size: φ6. mm). Fix the supplied wall-mount plate
securely on the wall before attaching the inverter onto the mounting plate.

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Figure 4-1: Attaching the mounting bracket for RPI H3A / H4A / H5A
Figure 4-2: Correct and incorrect installation illustration

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CAUTION!
• The bracket supplied with the unit is specially designed and should be the
only mounting device used for the unit.
• It is recommended to install the inverter in a suitable location which offers
easy and safe access for service and maintenance.
• Please leave an appropriate gap in between units when installing multiple
solar inverter systems.
• Please install solar inverter at eye level to allow easy observation for
operation and parameter setting.
• Ambient temperature for operation: -2 °C~+60°C (power derating above
40°C).
Please ensure the spacing requirement to allow for sufficient convective
cooling. It is essential to ensure sufficient space for product operation as
shown in Figure 4-3.
> 50CM
> 30CM > 30CM> 30CM
> 50CM
Figure 4-3: Adequate installation gap

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5 Wiring
5.1 Preparation before Wiring
1. Ensure voltage values and polarities are correct.
2. When grounding the solar array, an isolation transformer is required due to
the RPI H3A / H4A /H A not having galvanic isolation between the DC-input
and AC-output.
3. The ground fault detection is a fixed internal setting. It cannot be modified.
4. Whole system wiring can be seen in Figure 5-1 and Figure 5-2.
. Please refer to Figure 5-1 for connections. Inverter can accept DC inputs in
parallel (2 MPP trackers/ 2 parallel input).
Figure 5-1: Connection of a system for floating solar array

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Figure 5-2: Connection of a system for solar array grounding
WARNING! SHOCK HAZARD
Note: Whenever a PV array is exposed to sunlight, a shock hazard may exist
due to output wires or exposed terminals. To reduce the risk of shock during
installation, cover the array with an opaque (dark) material and ensure that the
Disconnect Device in the inverter is set to OFF before commencing any wiring.
5.2 AC Grid Connection: L + N + PE
WARNING!
Before commencing AC wiring, please ensure AC breaker is switched off.

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5.2.1 Required protective devices and cable
cross-sections
Table 5-1: Recommended upstream protection
Power rating Upstream circuit breaker
RPI H3A
RPI H4A
RPI H A
3.7 kVA
kVA
6.2 kVA
20A
2 A
30A
Please use appropriate wire to connect poles (According to the Table 5-2).
Table 5-2: AC wire requirement
Current Rating Wire size Torque
>20A (RPI H3A),
>2 A (RPI H4A),
>30 A (RPI H A)
3-4mm2 / 12 AWG 0.8~1Nm
PE
Section drawing
N
L1: L
2: N
: PE
Figure 5-3: AC plug illustration (C01620E0028001, AMPHENOL CORP)