Delta RPI M6A Specification sheet

RPI M6A/M8A/M10A
Operation and Installation Manual
Grid-tie Transformerless Solar Inverter
The power behind competitiveness
www.deltaww.com

1. General Information
1.1. About this Manual
1.2. Product Description
1.3. Additional Information
2. Product Overview
2.1. Checking Unit and Accessories
2.2. Product Label
2.3. Exterior Objects
3. Installation
3.1. Unpack the Inverter
3.2. Mount the Inverter
4. Wiring
4.1 Preparation before Wiring
4.2. AC Grid Connection: 3-Phase+PE or 3-Phase+N+PE
4.2.1. Required Protective Devices and Cable Cross-sections
4.3. DC Connection (from PV Array)
4.4. Multiple Inverter Combinations
4.4.1. Three-Phase Parallel Combination System
4.4.2. Communication Module Connections
4.4.3. RS-485 Connection
4.4.4. Digital Input & EPO Function & DRMs
4.4.5. Dry Contact Connection
4.4.6. DC Output Connection
5. Turn on/off PV inverter
5.1. First startup
5.2. Home Page
5.3. LCD Flow Chart
5.3.1. Power Meter
5.3.2. Energy Log
5.3.3. Event Log
5.3.4. Inverter Information
5.3.5. General Settings
5.3.6. Install Settings
5.3.6.1. Inverter ID
5.3.6.2. Insulation
5.3.6.3. Country
5.3.6.4. Grid Settings
5.3.6.5. Dry Contact
5.3.6.6. EPO
5.3.6.7. AC connection
5.3.6.8. Max Power
5.3.7. Active/Reactive power
5.3.7.1. Power Limit
5.3.7.2. Power vs. Frequency
5.3.7.3. P(V)
5.3.7.4. Constant cosphi
5.3.7.5. Cosphi (P)
5.3.7.6. Constant Q
5.3.7.7. Q(V)
5.3.8. FRT (Fault ride through)
6.Maintenance
7.Error message and Trouble Shooting
8.De-Commissioning
9.Technical Data
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Contents
03

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 hot. Sufficient cooling is necessary for optimal yield.
04

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.
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
PV Array Electrical GridSolar Inverter
Install if
necessary
DC Distribution
box
AC Distribution
box
Surge arrestor
Fuse
DC switch
Surge arrestor
AC breaker
3 phase,
N, PE
05
General Information

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. If there is any visible damage to the inverter/accesories or any
damage to the packaging, please contact your inverter supplier.
2.Product Overview
Figure 2-1 Packing list
For RPI M10A
For RPI M6A
For RPI M8A
RPI M6A/ RPI M8A/ RPI M10A
Object Qty Description
1 PV Inverter 1
1
1
1
RPI M6A/ RPI M8A/ RPI M10A solar inverter.
6 Screw 2 To fix solar inverter on the wall.
7 Washer 1 Use for external grounding.
8 12VDC Output Connector 1 For CNC406 using only,
DC output 12V / 0.5A max.
2
a. User Manual
b. Quick Installation Guide
(EU/AU/ EN/ DE/ FR/ NL)
c. General Safety Instruction
The Instruction to provide the information of
safety,Installation, specification, etc.
3 AC Plug
Mounting Bracket
Connector for AC connection.
To mount solar inverters on the wall.
4
5
DC Plug 2 / 3
sets
Connector for DC connection.
2 sets for M6A / M8A
3 sets for M10A
Table 2-1 Packing list
①
②
⑤
⑧
⑥⑦
④
③
06
Product Overview

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 see Figure 2-2.
RPI M6A/ M8A/ M10A
Figure 2-2 Product label
07
Product Overview

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
Communication Connection 1
AC Connectors
Manual Switch
DC Connectors
Label
RPI M6A/ M8A/ M10A
Communication Connections 2
Grounding Point
AC Connector
400Vac, 3Ph
Manual Switch
Communication 1
-RS-485 *2
-Ethernet (optional)
-Wi-Fi (optional)
Communication 2
-EPO *1
-Dry Contact *1
-Digital Input
-DRMs *5
*4 RPI M10A
RPI M6A/ M8A
Grounding
DRM
Mark
Figure 2-3 Inverter’s exterior objects
Figure 2-4 Input/output panels
08
Product Overview

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

3.2. Mount the Inverter
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.
To mount the inverter on the wall, please follow the procedure below:
1.Screw the mounting bracket on the wall with 8 M6 Phillips head screws.
Please refert to figure 3-4.
2.Attach the inverter to the mounting bracket.
3.Use Hex Wrench fixing the inverter with 2 M4 Hexagon Socket screws.
Please refer to figure 3-5.
Figure 3-2 Correct and incorrect installation
10
Installation

Figure 3-3 Mounting bracket dimension
Figure 3-4 Screw the mounting bracket
424
330
110
35
CL
440
458
302
327
60
30
20
11
Installation

M4 Hexagon Socket Screw M4 Hexagon Socket Screw
Figure 3-5 Attach inverter to the bracket and fasten with screws
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 between floor, ceiling, and unit when
installing inverter as shown in Figure 3-6. (There is no mandatory
requirement of the gap between unit and unit.)
• 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)
DRM
12
Installation

> 20 CM
> 20 CM
Figure 3-6 Proper installation gap
13
Installation

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.
• It must to keep DC and AC power off when disconnected the DC connector
even if turn off the manual switching that in the button cover.
4. Wiring
1
2
3
4
L1
L2
L3
N
PE
1
2
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.
DRM
14
Wiring

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.
The AC cable must be jacked and meet the specifications in table 4-2.
Model M6A/ M8A/ M10A supports both 3P3W (3-phase and PE) and 3P4W
(3-phase, N, and PE).
Model Upstream circuit breaker
RPI M6A/ M8A/ M10A 20A
G N L1 L3L2
N
L1
L2
L3
PE
To solar inverter AC
plug
Table 4-1 Recommended upstream protection
Table 4-2 AC input cable requirement
Model Current Rating Wire size Recommended Torque
RPI M6A
RPI M8A
RPI M10A
25 A 5 - 8 mm20.7 N.m
4.2. AC Grid Connection: 3-Phase+PE or 3-Phase+N+PE
15
Wiring

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
Figure 4-3 Striping the wires
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.
16
Wiring

RPI M6A/ M8A/ M10A use Amphenol AC connector with part number
C016 20E004 800 2. 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.
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%
L1 L2
N
PE
L3
Inverter
Fix it Rotate to loose the AC plug
Inverter
Rotate to tighten the inserter Rotate to tighten the plug Rotate gland to
fix cable
Cable
AC Plug
AC plug
1 : L1
2 : L2
3 : L3
4 : N
: PE
Cable
Cable Cable
L1
L2
L3
N
PE
Socket
Align the biggest latch of the AC plug and the socket
Figure 4-4 AC plug illustration for RPI M6A/ M8A/ M10A.
17
Wiring

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
DC1 4.25 kW
@ Vdc=425V-800V
5.65 kW
@ Vdc=565V-800V
7 kW
DC2
Maximum input power 6.6 kW 8.8 kW
5.4 kW
11 kW
Model Current Rating Wire size
M6A
M8A
M10A DC 15A
DC 10A
DC 10A
3 - 5mm2/ 12 AWG
2 - 3mm2/ 14 AWG
2 - 3mm2/ 14 AWG
Table 4-3 Maximum rating of input power
Table 4-4 Cable size
Figure 4-5 DC Plug Wiring illustration
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
18
Wiring

4.4. Multiple Inverter Combinations
RPI M6A/8A/10A can be used in three-phase parallel combination system.
In this application, inverter may be parallel connected to a same AC grid.
Please refer to Figure 4-6.
Figure 4-6 Three-phase parallel combinations
4.4.1. Three-Phase Parallel Combination System
L1 (Grid)
L2 (Grid)
L3 (Grid)
N (Grid)
19
Wiring

4.4.2. Communication Module Connections
The Communication 1 Module illustration please see Figure 4-7, the module
supports a RS-485 terminal for communication with a computer.
The Communication 2 Module illustration please see Figure 4-7, the module
Supports Digital Input, Demand Response Modes (DRMs), EPO, Dry Contact
and DC Output : 12V / 0.5A
Terminal Resistor
RS-485
+
-
+
-
VCC
GND
Communication 1
Communication 2
Figure 4-7 Communication module
Dry Contact DC Output 12V / 0.5A
DC Output 12V / 0.5A
RJ45 Socket
Digital Input*4
EPO*1
DRMs*5
20
Wiring