Delta RPI Series Specification sheet

RPI-M15A/M20A
Operation and Installation Manual
Grid-tie Transformerless Solar Inverter
The power behind competitiveness
www.deltaww.com
English 1
53
103
简体中文
繁體中文

1. General Information
1.1. About this Manual
1.2. Product Description
1.3. Additional Information
2. Product Overview
2.1. Unpack the Inverter
2.2. Checking Unit and Accessories
2.3. Product Label
2.4. Exterior Objects
3. Installation
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. Communication Module Connections
4.4.1. RS-485 Connection
4.4.2. EPO Functions
4.4.3. Dry Contact Connection
5. Turn On PV Inverter
5.1. LCD Flow Chart
5.2. First startup
5.2.1. Home Page
5.2.2. Power Meter
5.2.3. Energy Log
5.2.4. Event Log
5.2.5. Operation Data
5.2.6. Inverter Information
5.2.7. Settings
5.2.7.1. Personal Settings
5.2.7.2. Coefficient Settings
5.2.7.3. Install Settings
5.2.7.4. Active/Reactive Power Control
5.2.7.4.1. Active Power Control – Power Limit
5.2.7.4.2. Active Power Control – Power vs. Frequency
5.2.7.4.3. Active Power Control – P(V)
5.2.7.4.4. Reacitve Power Control – Constant cosφ
5.2.7.4.5. Reacitve Power Control – cosφ (P)
5.2.7.4.6. Reacitve Power Control – Constant Reactive Power
5.2.7.4.7. Reacitve Power Control – Q(V)
5.2.7.5. FRT (Fault ride through)
6.Maintenance
6.1. Clean Fan
6.2. Replace Fan
6.3. Clean Air Outlets
7.Error message and Trouble Shooting
8.De-Commissioning
9.Technical Data
10.Assembly Note
5
5
5
5
6
6
6
8
9
10
14
14
16
16
19
20
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
31
31
32
33
33
34
35
36
37
38
38
39
39
40
46
47
50
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 high temperatures and the device surface can
become quite hot. Sufficient cooling time 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-M15A/ RPI-M20A.
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 the 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 Grid
Solar Inverter
DC Distribution
box
3PH AC Distribution
box
Surge arrestor
Fuse
DC switch
Surge arrestor
AC breaker
3 phase, N, PE
05
General Information

Figure 2-1 Unpack the inverter
The unpacking procedure of RPI-M15A / M20A is shown as Figure 2-1.
2.Product Overview
2.1. Unpack the Inverter
2.2. Checking Unit and Accessories
Unforeseeable events causing damage or movement may occur during
shipment. Please check following items upon receiving your inverter.
• Check the damage on the packaging.
• Check if all the accessories are in the package, the standard accessories
are list as Table 2-1 & Figure 2-2.
• Check the model number and the serial number on the packaging is identical
with the model number and serial number on the unit itself.
If there is any visible damage to the inverter/accesories or any damage to
the packaging, please contact your inverter supplier.
06
Product Overview

Figure 2-2 Packing list
RPI-M15A/ RPI-M20A
Object Qty Description
1 PV Inverter 1 pcs
1 pcs
1 pcs
1 pcs
RPI series solar inverter
2 User Manual
The Instruction to provide the information of safety,
Installation, specification, etc.
3 AC Plug
Mounting Bracket
Connector for AC connection
Wall mounting bracket to mount the solar inverter
on the wall.
4
5
DC Plug 4 sets Connector for DC connection
Table 2-1 Packing list
Caution: If there is any visible damage to the inverter/accesories or any damage to
the packaging, please contact your inverter supplier.
①③
②⑤④
07
Product Overview

2.3. 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 2-3.
Figure 2-3 Product label
08
Product Overview

2.4. Exterior Objects
The Inverter’s exterior objects are shown in Figure 2-4. The detailed input/
output interfaces illustration is shown in Figure 2-5. Different models have
different number of DC input strings.
Label
DC Switch
Communication Connetions
LCD/LED Display and Buttons
Air outlets
DC Connectors
Fan*1 or *2
AC Connectors
Figure 2-4 Inverter’s exterior objects
Figure 2-5 Input/output panel
Communication
-RS-485 *2
-EPO *1
-Dry Contact *1
DC1 DC2
Fan(s) : 2 pcs
AC Connector
230/400Vac, 3Ph
DC Switch
String1
String2
String3
String4
09
Product Overview

Figure 3-1 Mount Dimention
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.
• PV array that have an IEC 61730 Class A rating, or external insulation
transformer shall be installed at grid side.
3.Installation
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 12 M6 Phillips head screws.
Please refert to Figure 3-3.
2.Attach the inverter to the mounting bracket.
3.Fix the inverter with 2 M6 Phillips head screws.
Please refer to Figure 3-4.
10
Installation

90
Not
Recommended
Not
Recommended
Keep >30 cm from floor and
water if installed this way
Figure 3-2 Recommended installation
Protection cover
CAUTION !
To avoid malfunction of inverter caused by extreme
weather (ex: snow, hail…etc) or non-proper installation/
maintenance, an additional protection cover is strongly
recommended to be installed by Delta.
For more details, please contact local service team.
11
Installation

M6 Screw *6
Wall
M6 Screw *6
Figure 3-3 Screw the mounting bracket
Figure 3-4 Attach to the bracket and fasten with screws
M6 Screw
12
Installation

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)
> 30 cm
> 20 cm
> 50 cm
> 30 cm
> 30 cm
Figure 3-5 Proper installation gap
13
Installation

4.1. Preparation Before Wiring
• For floating PV array, inverter can accept DC input in parallel connection
or separate connection.
• When grounding the solar array, an isolation transformer at AC side is
required and DC inputs must be parallel connection due to the RPI-series
not having galvanic isolation between the DC-input and AC-output.
• Different DC connection type needs different settings of insulation detection.
About setting, please refer to 5.2.7.3 Install Settings.
4. Wiring
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.
Figure 4-1 Connection of a system for floating DC inputs
1
2
3
4
L1
L2
L3
N
PE
Communication
Wiring
1
2
3
PV Array
AC Wiring
DC Wiring
Parallel or
Separate
DC Distribution box
DC1 DC2
*
*M15A / M20A can also
support 3P3W system.
14
Wiring

Figure 4-2 Connection of system with positive/negative ground
Isolated
transformer
Utility To
Inverter
3Ph,
400Vac 3Ph,
400Vac
Must be Parallel
Connection
PV Array
DC Distribution box
(Plus-GND or Minus-GND)
Z
Z
or
Must install a
transformer
M15A / M20A can also
support 3P3W system.
15
Wiring

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.
The AC cable must be jacketed and meet the specifications in table 4-2.
RPI-M15A and M20A support both 3P3W (3phase and PE) and
3P4W (3phase, N and PE) connections.
Model Upstream circuit breaker
RPI-M15A 30A
RPI-M20A 40A
Model Current Rating Recommended TorqueCable size
40 ARPI-M15A 0.7 N.m
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
40 ARPI-M20A 0.7 N.m
6 mm2or 10 AWG / 8 AWG
6 mm2or 10 AWG / 8 AWG
16
Wiring

CAUTION！Machine and equipment damage may occur.
Make sure to choose proper size for AC cable.
- Failed to follow these instructions may cause AC plug damage.
- AC plug’s installation must meets the local electrical code.
- If there is any conflict between installation instruction and electrical code,
please follow the electrical code.
Figure 4-3 Striping the wires
Follow the steps below to strip the wires before assembling the AC plug:
• Remove 68.5 mm (MAX) of AC cable outer jacket.
• Trim the L1, L2, L3, and N wire to 70 mm (MAX).
• Strip 20 mm of insulation from all wires ends.
70 mm (MAX)
68.5 mm (MAX)
5*20 mm
PE
N
L1
L2
L3
Outer Jacket
Assemble the AC plug and wires as the procedures shown in Figure 4-4.
The sequence of L1~ L3 can be connected randomly. However,
N and PE must be connected correctly.
1. The packing has the parts of AC Plug, please follow
the step to assemble the ac plug first. The fastening
torque range is 55kgf-cm~75kgf-cm.
2. Rotate the plug to release part A & B.
A
B
Figure 4-4 AC plug illustration for M15A/ M20A.
D1 D2 D3 D4
3. Users should select the appropriate diameter rubber gasket for part A to ensure good water resistance.
Cable range (mm) / Part F fastening torque (Nm) / Fastening distance P (mm)
Tightening torque (N・m)
D1
D2 20.5 ~ 32.6 13 ~ 20
D3 15.3 ~ 20.5
Gap P (mm)Outer jacket diameter (mm)
32.6 ~ 41.3 13 ~ 20 1 ~ 7
0 ~ 7
13 ~ 20 1 ~ 5.5
9 ~ 13 1 ~ 6.5D4 10.8 ~ 16
17
Wiring

User should set AC connection (3P3W or 3P4W) by display to make sure voltage
reading is correct. Please refer to 5.2.7.3 Install Setting.
The AC voltage should be as followings:
Figure 4-4 AC plug illustration for M15A/ M20A. (continued)
5. Rotate to tighten the part B first and rotate the gland (part A) to fix wires.
4. Users should use conduit or not base on wire size.
1. Use Terminal + Conduit:
If wire size is 5.2mm2~ 10.0mm2.
2. Use Terminal only (remove conduit):
If wire size is 14mm2~ 22mm2.
For 3P4W Power system :
There are 5 wires that include
(L1、L2、L3、N) + PE
For 3P3W Power system :
There are 4 wires that include
(L1、L2、L3) + PE
Conduit
Terminal
L1
L2L3
N
PE
L1
L2L3
PE
A
B
3P3W
L1-L2: 400 Vac ± 10%
L1-L3: 400 Vac ± 10%
L2-L3: 400 Vac ± 10%
3P4W
L1-N: 230 Vac ± 10%
L2-N: 230 Vac ± 10%
L3-N: 230 Vac ± 10%
18
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.
Model Current Rating Wire size
M15A / M20A DC 22A 4 - 6mm2/ 12 - 10 AWG
Table 4-3 Maximum rating of input power
Table 4-4 Cable size
Figure 4-5 DC 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.
Type of limit RPI-M15A
Total input power 16.5 kW
DC1 or DC2 11.1 kW
RPI-M20A
22 kW
14.8 kW
PV-KST 4/6 Ⅱ
PV-KBT 4/6 Ⅱ
19
Wiring

4.4. Communication Module Connections
Please refer to Figure 4-6 for the Communication Module illustration.
The module provides VCC, RS-485, dry contact, and EPO for different use.
Figure 4-6 Communication module
Terminal Resistor
Dry contact
(3A / 28V)
RS-485
VCC
GND
+
-
+
-
EPO
(Emergency Power off)
20
Wiring