Delta RPI M6A Specification sheet

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RPI M6A / M8A / M10A Operation and Installation Manual
Grid-tie Transfomerless Solar Inverter

03
Contents
1. General Information--------------------------------------------------------------5
1.1. About this Manual ------------------------------------------------------------ 5
1.2. Product Description---------------------------------------------------------- 5
1.3. Additional Information------------------------------------------------------- 5
2. Product Overview-----------------------------------------------------------------6
2.1. Checking Unit and Accessories------------------------------------------- 6
2.2. Product Label------------------------------------------------------------------ 7
2.3. Exterior Objects--------------------------------------------------------------- 7
3. Installation --------------------------------------------------------------------------9
3.1. Unpack the Inverter---------------------------------------------------------- 9
3.2. Mounting position------------------------------------------------------------10
3.3. Mounting Dimension--------------------------------------------------------11
4. Wiring ---------------------------------------------------------------------------14
4.1. Preparation before Wiring-------------------------------------------------14
4.2. AC Grid Connection: 3-Phase+PE or 3-Phase+N+PE-------------15
4.2.1. Required Protective Devices and Cable Cross-sections-15
4.3. DC Connection (from PV Array) -----------------------------------------18
4.4. Communication Module Connections----------------------------------19
4.4.1. RS-485 Connection------------------------------------------------20
4.4.2. Digital Input & EPO Functions ----------------------------------21
4.4.3. Dry Contact Connection ------------------------------------------22
5. Turn on/off PV inverter--------------------------------------------------------23
5.1. First startup -------------------------------------------------------------------23
5.2. Home Page -------------------------------------------------------------------24
5.3. LCD Flow Chart--------------------------------------------------------------24
5.3.1. Power Meter ---------------------------------------------------------25
5.3.2. Energy Log-----------------------------------------------------------25
5.3.3. Event Log-------------------------------------------------------------26
5.3.4. Inverter Information ------------------------------------------------26
5.3.5. General Settings----------------------------------------------------27
5.3.6. Install Settings-------------------------------------------------------27
5.3.7. Active/Reactive power---------------------------------------------28
5.3.8. FRT (Fault ride through)------------------------------------------32
6. Maintenance----------------------------------------------------------------------33
7. Error message and Trouble Shooting -----------------------------------34
8. De-Commissioning-------------------------------------------------------------40
9. Technical Data -------------------------------------------------------------------41

04
Safety Instructions
This manual uses the following instructions for conveying important safety related
information.
CAUTION ！
Machine and equipment damage may occur if this hazardous situation is
not avoided.
WARNING ！
Death and serious injury may occur if this hazardous situation is not
avoided.
Repair work on the device should ONLY be carried out by the
manufacturer. No user serviceable parts inside.
In Australia, installation and maintenance work shall be conducted by
qualified electrician and shall comply with Australian Regulations.
DANGER ！
To avoid risk of electrical shock, do not open the solar inverter. Death
and serious injury will occur if this hazardous situation is not avoided.
WARNING ！BURN HAZARD
The unit may reach very high temperatures and the device surface can
become quite hot. Sufficient cooling time is necessary for optimal yield.

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1.General Information
1.1. About this Manual
This manual is to provide the explanation and procedures for installing,
operating, maintaining, and troubleshooting the below solar inverters:
RPI M6A/ RPI M8A/ RPI M10A
1.2. Product Description
This device is a 3-phase grid-tied solar inverter which does not support
off-grid functionality.
The operation of solar inverter is shown as
figure 1-1 . Inverters convert
the DC input power supplied from the PV Array into 3-phase AC output
power to Grid.
AC breaker
Surge arrestorSurge arrestor
DC switch
Fuse
AC Distribution
box
DC Distribution
box
Install if
necessary
3 phase,
N, PE
Figure 1-1 Solar system operation illustration
1.3. Additional Information
For more detailed or other related product information, please visit
http://www.deltaww.com
General Information

06
2.Product Overview
2.1. Checking Unit and Accessories
Unpredictable damages may occur during shipment. Check if all the
accessories are in the package, the standard accessories are list as
Table 2-1:
Figure 2-1 Packing listUnit
RPI M6A/ RPI M8A/ RPI M10A
Object Qty Description
1PV Inverter 1RPI M6A/ RPI M8A/ RPI M10A solar inverter
2User Manual 1The Instruction to provide the information of safety,
Installation, specification, etc.
3AC Plug 1Connector for AC connection
4Mounting Bracket 1To mount solar inverters on the wall.
Table 2-1 Packing list
Remark；If there is any visible damage to the inverter/accesories
or any damage to the packaging, please contact your
inverter supplier.
Product Overview

07
2.2. Product Label
Users can identify the model number and the specifications by the
information on the product label. The location for the label please sees
Figure 2-2.
RPI M6A/ M8A/ M10A
Figure 2-2 Product label
2.3. Exterior Objects
The Inverter's exterior objects are shown in Figure 2-3. The detailed
input/output interfaces illustration is shown in
Figure 2-4.
LCD/LED Display
and Buttons
C
ommunication Connection 1
AC Connectors
AC/DC Switch
DC Connectors
Label
RPI M6A/ M8A/ M10A
Communication Connections 2
Grounding Hole
Figure 2-3 Inverter’s exterior objects
Product Overview

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AC Connector
400Vac, 3Ph
AC/DC Switch
Communication 1
-RS-485 *2
-Ethernet (optional)
-Wi-Fi (optional)
Communication 2
-EPO *1
-Dry Contact *1
-Digital Input*6
RPI M10A
RPI M6A/ M8A
Grounding
Mark
Figure 2-4 Input/output panels
Product Overview

09
CAUTION ！
The unit should not be installed in a direct sunlight.
WARNING ！
• Do not install the unit near or on flammable surfaces.
• Please mount the unit tightly on a solid/smooth surface.
3.1. Unpack the Inverter
3.Installation
Installation
Figure 3-1 Unpacking the inverter

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3.2. Mounting position
This unit is designed to be wall-mounted. Please ensure the installation
is perpendicular to the floor and the AC plug at the bottom. Do not
install the device on a slanting wall. Fix the supplied wall-mount plate
securely on the wall before attaching the inverter onto the mounting
plate.
Figure 3-2 Correct and incorrect installation
Installation

11
3.3. Mounting braket Dimension
Figure 3-3 Mounting bracket demension
Installation

12
M4 Screw M4 Screw
Figure 3-4 Attach inverter to the bracket and fasten with screws
Installation

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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 non-obscured and safe access, in turn ensuring easy access
for service and maintenance.
• Please leave an appropriate gap in between units when installing
several solar inverter systems as shown in Figure 3-5.
• Please install solar inverter at an eye level to allow easy observation
for operation and parameter setting.
• Ambient temperature -25°C~60°C.(power de-rating above 40°C)
Figure 3-5 Proper installation gap
Installation

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4.Wiring
4.1. Preparation before Wiring
• When grounding the solar array, an isolation transformer is required
due to the RPI M6A/ M8A/ M10A not having galvanic isolation
between the DC-input and AC-output. Wiring illustrations please refer
to Figure 4-1.
• Inverters provide DC inputs in parallel (2 MPP tracker/ 3 parallel
inputs).
• Different DC connections type need different settings of insulation
detection.
1
2
3
4
L1
L2
L3
N
PE
Communication
Wiring
1
2
3
AC Wiring
DC Wiring
Parallel or
Separate
*
* RPI M6A/ M8A/ M10A
can also support 3P3W system
.
+
-
+
-
+
-
Figure 4-1 Connection of a system for floating solar array
WARNING ！SHOCK HAZARD
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.
Wiring

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4.2. AC Grid Connection: 3-Phase+PE or 3-Phase+N+PE
WARNING ！
Before commencing AC wiring, please ensure AC breaker is switched
off.
4.2.1. Required Protective Devices and Cable Cross-sections
It is recommended to install an upstream circuit breaker between AC
side and inverter side for over current protection.
Model Upstream circuit breaker
RPI M6A/ M8A/ M10A 20A
Table 4-1 Recommended upstream protection
G N L1 L3L2
N
L1
L2
L3
PE
To solar inverter AC
plug
The AC cable must be jacked and meet the specifications in table 4-2.
Model Current Rating Wire size Recommended Torque
RPI M6A
RPI M8A
RPI M10A 25 A 5 - 8 mm2 0.7 N m
Table 4-2 AC input cable requirement
Model M6A/ M8A/ M10A supports both 3P3W (3-phase and PE) and
3P4W (3-phase, N, and PE).
Wiring

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CAUTION ！Machine and equipment damage may occur.
• Make sure to choose proper size for AC cable. Please choose the
terminals as shown in figure 4-2 for wires crimping.
• Failed to follow these instructions may cause AC plug damage.
Figure 4-2 Terminal for wire crimping
Follow the steps below to strip the wires before assembling the AC plug
as shown in Figure 4-3:
• Remove 55 mm (2.2 inch) of AC cable outer jacket.
• Trim the L1, L2, L3, and N wire to 52.5 mm (2.0 inch).
• Strip 12 mm (0.5 inch) of insulation from all wires ends.
• Crimp terminals for all wires.
52.2 mm
[2.0 in.]
12 mm
[0.5 in.]
55 mm [2.2 in.] (PE)
Outer jacket
Figure 4-3 Striping the wires
Wiring

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Assemble the AC plug and wires as the procedures shown in figure
4-4.
The sequence of L1~ L3 can be random. However, N and PE must
be connected correctly.
Fix it
AC Plug
Inverter
Rotate to tighten the inserter
Inverter
Socket AC plug
Rotate to tighten the plug
Align the biggest latch of the AC plug and the socket
Rotate gland to
fix cable
Rotate to loose the AC plug
Figure 4-4 AC plug illustration for RPI M6A/ M8A/ M10A.
After wiring, installer should choose the AC connection type on the
control panel. About setting, please refer to 5.3.6 Install Settings.
The AC voltage should be as followings:
3P3W 3P4W
L1-L2: 400 Vac ±10% L1-N: 230 Vac ±10%
L1-L3: 400 Vac ±10% L2-N: 230 Vac ±10%
L2-L3: 400 Vac ±10% L3-N: 230 Vac ±10%
Wiring

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4.3. DC Connection (from PV Array)
WARNING ！
• When undertaking DC wiring, please ensure the correct polarities are
connected.
• When undertaking DC wiring please ensures that the power switch
on the PV array is OFF.
CAUTION ！
• The connection number of PV Array, open circuit voltage and power
of all strings in DC1 must be coherent.
• The maximum open circuit voltage of PV Array cannot exceed 1000V.
• Any device installed between PV Array and inverter must meet the
following specifications:
Rated voltage > open-circuit voltage of PV Array.
Rated current > short-circuit current of PV Array.
• The input power to the inverter should not higher than the rated
power shown in table 4-3.
Type of limit RPI M6A RPI M8A RPI M10A
Total input power 6.5 kW 8.6 kW 10.8 kW
DC1 / DC2 3.25 kW / 3.25 kW 4.3 kW / 4.3 kW 7.1 kW / 3.6 kW
Table 4-3 Maximum rating of input power
Model Current Rating Wire size
M6A DC 10A 2 - 3mm2/ 14 AWG
M8A DC 10A 2 - 3mm2/ 14 AWG
M10A DC 15A 3 - 5mm2/ 12 AWG
Table 4-4 Cable size
DC wiring polarities are divided into positive and negative, which
is shown in
Figure 4-5. The connection shall be coherent with the
indication marked on inverter.
PV-KBT4/6 ⅡPV-KST4/6 Ⅱ
Figure 4-5 DC Plug Wiring illustration
Wiring

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4.4. Communication Module Connections
The Communication Module illustration please see figure 4-6 , the
module supports a RS-485 terminal for communication with a computer.
Terminal Resistor
RS-485
+
-
+
-
VCC
GND
Communication 1
Communication 2
D
ry Contact
D
igital Input*6
E
PO*1
Figure 4-6 Communication module
Wiring

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4.4.1. RS-485 Connection
The pin definition of RS-485 is shown in table 4-5. Installers should
switch ON the terminal resistor when single inverter is installed. The
wiring of multi-inverters connection is shown as
figure 4-7. Installers
should switch ON terminal resister at the first and last devices of the
RS485 chain as shown. The other terminal resisters should be switched
OFF.
Pin Function
1VCC (+12V)
2GND
3DATA+
4DATA-
5DATA+
6DATA-
RPI M6A/ M8A/ M10A
Table 4-5 Definition of RS 485 pin
Data Format:
Baud rate: 9600, 19200, or 38400
Data bits: 8
Stop bit: 1
Parity: N/ARS485/USB
or
RS485/RS232
Terminal Resister
120Ω(1/2W)
DATA+ to DATA-
Termina
l Resister
120Ω(1/2W)
DATA+
to DATA-
Figure 4-7 Multi-inverter connection illustration
Wiring