Delta Electronics RPI M30A, RPI M50A Operation And Installation Manual

RPI M30A/M50A Operation and Installation Manual

Grid-tie Transfomerless Solar Inverter

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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 (Models with Fuses)

4.2. Preparation Before Wiring (Models without Fuse)

4.3. AC Grid Connection: 3-Phase+PE or 3-Phase+N+PE

4.3.1. Required Protective Devices and Cable Cross-sections

4.4. DC Connection from PV Array

4.5. Communication Module Connections

4.5.1. RS-485 Connection

4.5.2. EPO Functions & Digital Input

4.5.3. 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. Inverter Information

5.2.6. General Settings

5.2.7. Install Settings

5.2.7.1. Inverter ID

5.2.7.2. Insulation

5.2.7.3. Country

5.2.7.4. Grid Settings

5.2.7.5. Dry Contact

5.2.7.6. EPO

5.2.7.7. AC connection

5.2.7.8. Max. Power

5.2.8. Active/Reactive power

5.2.8.1. Power Limit

5.2.8.2. Power vs. Frequency

5.2.8.3. P(V)

5.2.8.4. Constant cosphi

5.2.8.5. Cosphi (P)

5.2.8.6. Constant Q

5.2.8.7. Q(V)

5.2.9. FRT (Fault ride through)

6.Maintenance

6.1. Replace Surge Protection Device (SPD)

6.2. Replace Internal String Fuse

6.3. Clean Fan

6.4. Replace Fan

6.5. Clean Air Inlets

7.Error message and Trouble Shooting

8.De-Commissioning

9.Technical Data

5 5 5

6 6 9

12 16

16 21 31 31 35 36 37 38 39

40 41 41 42 42 43 44 44 45 45 46 46 47 48 49 49 49 50 50 50 51 52 52 53 53 54

56 58 59 60 60

61 67 68

Contents

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 hot. Sufficient cooling time is necessary for optimal yield.

1.General Information

1.1. About this Manual

This manual is to provide the explanation and procedures for installing, operating, maintaining, and troubleshooting of RPI M30A/ RPI M50A solar

inverters.

1.2. Product Description

This device is a 3-phase grid-tied solar inverter which does not support offgrid 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 GridSolar Inverter

3PH

AC Distribution

box

Surge arrestor

AC breaker

3 phase, N, PE

General Information

Figure 2-1 Unpack the inverter

The unpacking procedure of RPI M30A/ M50A 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 shown in following tables and figures: For RPI M30A, Please refer to Figure 2-2 and Table 2-1. For RPI M50A, Please refer to Figure 2-3 and Table 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.

Product Overview

Figure 2-2 Packing list of M30A

RPI M30A

Object Qty Description

1 PV Inverter 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.

DC Plug 6 sets Connector for DC connection

Table 2-1 Packing list of M30A

※These products does not provide grounding fuse. Users can choose 1000V/ 1A Midget size grounding fuse if needed.

①

②

⑤

④

③

Product Overview

Figure 2-3 Packing list of M50A

RPI M50A

Object Qty Description

1 PV Inverter 1 pcs

1 pcs

RPI series solar inverter

6 Holder 1 pcs Holder for Grounding Fuse

7 Bus-bar 2 pcs Bus-bar for DC+ or DC- Parallel Connection.

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.

DC Plug 10 sets Connector for DC connection

Table 2-2 Packing list of M50A

※These products does not provide grounding fuse. Users can choose 1000V/ 1A Midget size grounding fuse if needed.

①

②

⑤ ⑥

⑦

④③

Product Overview

2.3 Product Label

RPI M50A RPI M30A

Please refer to Figure 2-4 for the location of product label. You can identify the model number and the specifications by the information on the label. RPI M30A and M50A series have 3 models. The differences between them are having surge protection devices (SPD) and internal strings fuse or not. For more detail information, please see the table 2-3.

Figure 2-4 Product label

Model Name Part Number

RPI303FA0E1100

RPI503FA0E0000

RPI503FA0E0200

SPD

Internal Fuse

RPI M30A_121

RPI M50A_120

RPI M50A_122

Table 2-3 Model name

Product Overview

2.4 Exterior Objects

Display

Air inlet

Label

RPI M50A

Display

Air inlet

Label

RPI M30A

Input / Output

Interfaces

Input / Output

Interfaces

The Inverter’s exterior objects are shown in Figure 2-5. The detailed input/ output interfaces illustration is shown in Figure 2-6. Different models have different number of DC input strings.

Figure 2-5 Inverter’s exterior objects

Product Overview

Figure 2-6 Input / output interface

AC Connector

380/400Vac, 3Ph

Fan *5Manual

Switch

String1

String2

String3

Communication

-RS-485 *2

-EPO *1

-Dry Contact *2

-Digital Input*6

DC1 DC2

String8

String9

String10

-String4 String5

-String6 String7

RPI M50A

DC1 DC2

String1

String2

String3 String4

String5

String6

AC Connector

380/400Vac, 3Ph

Fan *3

Manual

Switch

Communication

-RS-485 *2

-EPO *1

-Dry Contact *2

-Digital Input*6

RPI M30A

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

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.

Installation

Figure 3-1 Mounting bracket dimension

Figure 3-2 Recommended installation

Not

Recommended

Not

Recommended

Keep >30 cm from floor and

water if installed this way

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

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

Figure 3-5 Proper installation gap

Installation

4.1 Preparation Before Wiring (Models with Fuses)

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.

• M50A has 15A DC fuse in each Plus and Minus DC connector, the maximum current of each string should not exceed 10A.

• For models with fuses, PV arrays can connect to the inverter directly, but parallel connection at external DC distribution box is not recommended due to the limits of DC fuse. Please refer to Figure 4-1 for the detail wiring illustrations.

• If you want inverter working at parallel input mode (only 1 MPPT), please install 2 bus bar kits in the inverter as shown in Figure 4-2. The outer wiring

at DC side is same as Firgure 4-1.

• When grounding the solar array, an isolation transformer is required

because the RPI series does not have galvanic isolation between the DC-input and AC-output. In addition, Users must install a 1000V/1A midget size grounding fuse and 1 or 2 bus bar kits in the inverter. Wiring illustrations please refer to Figure 4-3, Figure 4-4.

• When solar array is grounded,the PID function can not be enable,and the

insulation have to be setting “Plus Grounded” or “Minus Grounded”.

•

It must to keep DC and AC power off when disconnected the DC connector.

•

Different DC connections type need different settings of insulation detection.

Please refer to 5.2.7 Install Settings for further information.

Wiring

Figure 4-1 floating string with separate connection

1 2 3 4

L1 L2 L3

Communication

Wiring

AC Wiring

DC Wiring

Must be Separate PV strings

* RPI M30A can support 3P3W system.

+-+

1 2 3 4

L1 L2 L3

Communication

Wiring

1 2

AC Wiring DC Wiring

Must be Separate PV strings

* RPI M50A can support 3P3W system.

++++

- -- -

RPI M50A

RPI M30A

Wiring

bus bar kit *2

DC1+

DC2+

DC1-

DC2-

String 1~5 +

String 6~10 +

String 1~5 -

String 6~10 -

RPI M50A

Figure 4-2 Force M50A operate in parallel mode

Wiring

Communication

Wiring

1 2

AC Wiring DC Wiring

Separated connection only

- -- -

Isolated

transformer

Utility

Inverter

3Ph,

400Vac

3Ph,

400Vac

++++

DC1+

DC2+

DC1-

DC2-

String 1~5 +

String 6~10 +

String 1~5 -

String 6~10 -

1A Grounding fuse

bus bar kit

Figure 4-3 Minus grounding of M50A with fuse

Wiring

Communication

Wiring

1 2

AC Wiring DC Wiring

Separated connection only

- -- -

Isolated

transformer

Utility

Inverter

3Ph,

400Vac

3Ph,

400Vac

++++

1A Grounding fuse

bus bar kit *2

DC1+

DC2+

DC1-

DC2-

String 1~5 +

String 6~10 +

String 1~5 -

String 6~10 -

Figure 4-4 Plus grounding of M50A with fuse

Wiring

4.2 Preparation Before Wiring (Models without Fuse)

• RPI M30A_121 does not have internal strings fuse. Each string can accept

maximum current 30A. It can use one pair of DC connector for each input (DC1 and DC2)

• 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.

• When solar array is grounded,the PID function can not be enable,and the

insulation have to be setting “Plus Grounded” or “Minus Grounded”.

•

Different DC connection type needs different settings of insulation detection.

About setting, please refer to 5.2.7 Install Settings.

Figure 4-5 floating string of M30A_121

1 2 3 4

L1 L2 L3

Communication

Wiring

PV Array

AC Wiring

DC Wiring

Parallel or

Separate

* RPI M30A can support 3P3W system.

DC Distribution box

DC1 DC2

Wiring

Figure 4-6 Plus or minus grounding wiring of M30A_121

Communication

Wiring

PV Array

AC Wiring

Must be Parallel

Connection

Do not enable the PID function and set the insulation with “Plus Grounded” or “Minus Grounded”.

DC Distribution box

(Plus-GND or Minus-GND)

Isolated

transformer

Utility

Inverter

3Ph,

400Vac

3Ph,

400Vac

Must install a

transformer

DC Wiring

Wiring

Connection with PV Combiner Box

M50A:

Note for Field Wiring

Due to the limitation of physical wire also the DC connector used in the inverter, the absolute maximum current of each DC connector should be always observed as following table to keep fire risk away. Note that, the following value is provided to identified and checked the justification for field wiring instead of the DC current rating of inverter.

-Normally, the output current of combiner box is larger than 16A. Thus it can’t be used as the following diagram (Shown as Figure 4-7).

M50A is not suitable to connected with PV combiner box.

RPI M30A_121 32A

RPI M50A_120 16A

RPI M50A_122 16A

Table 4-1 Maximun current rating of each DC connector

Figure 4-7

>16A >16A

>16A

Wiring

-Also, you can’t use two or more branch to share the current from combiner box to each dc connector of inverter (Shown as Figure 4-8). Because the current might not be symmetric among the branch,the current of one branch might larger than the limitation still.

Figure 4-8

>16A

Strictly forbiden

Risk of fire on internal entrance cabling

M50A:

Wiring

The following diagram shown risky connection with M30A and PV combiner box. As Figure 4-10 shown , the left pair of dc connector will suffer DC input current more than the limitation 32A.Thus it is not suitable for use.

Figure 4-10

M30A:

>32A

Wiring

As Figure 4-11 shown , the branch plug might suffer the DC current lager than its limitation. Thus it is not suitable for use.

*Note that the max current rating of MC4 brauch commercially available is 30A.

Figure 4-11

>30A

*Note

>30A

M30A:

Wiring

To Use RPI M50A with 12 PV string

• To apply branch connector on specific indicated DC input connectors.

• To replace relative string fuse for the branch from 15A to 25A by opening

the middle front cover.

The Specific DC input connectors

The inverter equips with 10 pair DC connector. When 12 string applied, branch plug are required. See following illustrate.

RPI M50A

String 1 String 2 String 3 String 5 String 4

String 6 String 7 String 8 String 9

String 10

String 1

String 2

String 3

String 5

String 6

String 8

String 9

String 11

String 12

String 10

String 7

String 4

Branch Plug

Wiring

For this application, the inverter provides specific 2 pairs of DC input connectors to connect with branch plugs. Both 2 pairs of DC input connectors indicated by symbols shown as following picture. Note that for Dc input connectors other than the specific two are forbidden with such application.

Wiring

The Relative String Fuse for the branch plug

The inverter provide string fuse with rating 15A in default. When 2 PV string are connected via branch plug to the specific DC connector, the current passed through specific connector will be higher than that with only one PV string. The rating of string fuse for the specific Dc connector should be enlarged, 25A is recommended. Please refer to Sec 6.2 to find where String Fuse are. 4 string fuse applied on the specific Dc connector are indicated as group “Max 25A”.

Wiring

Material List for application with 12 String

MC4 Branch Plug

25A String Fuse

-Male Cable Coupler (For polarity +) ,2 Pcs required per inverter

-Female Cable Coupler (For polarity –) ,2 Pcs required per inverter

Male Cable Coupler Female cable coupler

Vendor/Model No

Multi-Contact/PV-AZS4

Vendor/Model No

Multi-Contact/PV-AZB4

Little Fuse /0SPF025.T - 1000V/25A ,4 pcs required per inverter

Male cable coupler Female cable coupler

Wiring

+ 198 hidden pages

Delta Electronics RPI M30A, RPI M50A Operation And Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual