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Delta Manuals
Inverter
M30A_121
Operation and installation manual
Delta M30A_121 Operation And Installation Manual
Grid-tie transformerless solar inverter
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
1 General Information
About this Manual
Product Description
Additional Information
2 Product Overview
Unpack the Inverter
Checking Unit and Accessories
Product Label
Exterior Objects
3 Installation
4 Wiring
Preparation before Wiring (M30A
Preparation before Wiring (M30A
AC Grid Connection: 3-Phase+Pe or 3-Phase+N+Pe
Required Protective Devices and Cable Cross-Sections
Permitted Earthing Systems
DC Connection from PV Array
Multiple Inverter Combinations
Three-Phase Parallel Combination System
Communication Module Connections
Connection
EPO Function & Digital Input & Drms
Dry Contact Connection
5 Turn on PV Inverter
First Startup
Home Page
Power Meter
Energy Log
Event Log
Inverter Information
General Settings
Install Settings
Inverter ID
Insulation
Country
Grid Settings
Dry Contact
Pid
Epo
AC Connection
Max. Power
Active / Reactive Power
Power Limit
Power Vs. Frequency
P(V)
Constant Cosphi
Cosphi (P)
Constant Q
Q(V)
FRT (Fault Ride Through)
6 Maintenance
Replace Surge Protection Device (SPD)
Replace Internal String Fuse
Clean Fan
Replace Fan
Clean Air Inlets
7 Error Message and Trouble Shooting
8 De-Commissioning
9 Technical Data
Appendix
Appendix A: I-V Curve Limitation
Appendix B: Torque List
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Quick Links
1
Communication Module Connections
2
7 Error Message and Trouble Shooting
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The power behind competitiveness
Grid-tie Transformerless Solar Inverter
RPI M30A
/ M30A
_120
_121
Operation and Installation Manual
English
1
79
155
www.deltaww.com
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Summarization of Contents
General Information
About this Manual
Provides explanations and procedures for installing, operating, maintaining, and troubleshooting solar inverters.
Product Description
Details the device as a 3-phase grid-tied solar inverter without off-grid functionality and its PID suppression feature.
Additional Information
Directs users to the manufacturer's website for more detailed product information and resources.
Product Overview
Unpack the Inverter
Outlines the procedure for unpacking the RPI M30A_120 / M30A_121 inverter unit.
Checking Unit and Accessories
Guides users on inspecting the inverter and accessories for damage and completeness upon receiving the shipment.
Product Label
Explains how to identify the inverter model and specifications using the product label.
Exterior Objects
Illustrates the inverter's external components and input/output interfaces.
Installation
Mounting Bracket Dimensions
Presents the precise dimensions and specifications for the inverter's mounting bracket.
Mounting Bracket Installation
Details the process of securely attaching the mounting bracket to the wall using screws.
Installation Practices and Airflow
Provides guidelines on proper inverter placement, spacing, and environmental considerations for safe operation.
Wiring
4.1 Preparation Before Wiring (M30A_120)
Covers essential preparation steps, including DC fuse information and grounding requirements for M30A_120.
4.2 Preparation Before Wiring (M30A_121)
Details preparation steps for M30A_121, including fuse absence, current limits, and grounding considerations.
4.3 AC Grid Connection
Explains the requirements for connecting the inverter to a 3-phase AC grid, including protective devices and cable specifications.
4.4 DC Connection from PV Array
Guides on connecting the PV array to the inverter's DC inputs, emphasizing polarity and voltage limits.
4.5 Multiple Inverter Combinations
Describes how to combine multiple inverters for parallel operation and connection of communication modules.
Turn On PV Inverter
5.1 LCD Flow Chart
Introduces the inverter's LCD display and LED indicators for status monitoring.
5.2 First startup
Details the initial startup sequence, including language and country settings, followed by self-testing.
5.2.1 Home Page
Shows the inverter's homepage display, providing status, output power, and energy information.
5.2.2 Power Meter
Explains how the Power Meter page displays AC and DC voltage, current, and power readings.
5.2.3 Energy Log
Describes how to view the inverter's life energy and runtime data through the Energy Log page.
5.2.4 Event Log
Details the Event Log page, which records internal errors and grid faults with timestamps.
5.2.5 Inverter Information
Provides access to serial number, installation date, ID, firmware version, and function settings.
5.2.6 General Settings
Covers settings for language, date, time, and RS-485 communication baud rate.
5.2.7 Install Settings
Introduces settings configurable by users or installers, including inverter ID, insulation, and country.
5.2.8 Active / Reactive power Control
Introduces modes for controlling active and reactive power, including Power Limit and Constant cosphi.
5.2.9 FRT (Fault ride through)
Explains enabling FRT function to maintain grid connection during sudden voltage drops.
Maintenance
6.1 Replace Surge Protection Device (SPD)
Provides step-by-step instructions for replacing a damaged Surge Protection Device (SPD).
6.2 Replace Internal String Fuse
Guides on safely replacing internal string fuses when the inverter's power generation is abnormal.
6.3 Clean Fan
Explains how to disassemble the fan panel to clean the fans and remove accumulated dust.
6.4 Replace Fans
Details the procedure for replacing a faulty fan by disassembling the fan bracket and connectors.
6.5 Clean Air Inlets
Instructs on regularly unscrewing and cleaning the air inlets to ensure proper ventilation.
Troubleshooting
Error Messages and Troubleshooting
Lists common error messages, their possible causes, and recommended actions for resolution.
De-Commissioning
De-Commissioning Procedures
Provides essential safety procedures for safely shutting down and disconnecting the inverter for maintenance or storage.
Technical Data
General Specifications
Presents general technical details including enclosure, operating temperature, altitude, and safety class.
DC Input Specifications
Lists specifications related to DC input, such as maximum input power, nominal voltage, and MPP trackers.
AC Output Specifications
Details AC output parameters like nominal power, voltage, current, frequency, and efficiency.
System Information and Compliance
Covers user interface, communication standards, regulatory compliance, and miscellaneous specifications.
Temperature Derating Curves
Illustrates how output power is affected by ambient temperature at different power factors and voltages.
Appendix A: I-V curve limitation
I-V Curve Limitation for Fuse
Explains the I-V curve limitation based on fuse safety and configuration for solar panels.
Appendix B: Torque List
Torque Specifications
Provides a list of screw locations and their corresponding torque specifications for assembly.
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