GB/T 46985.3-2025Safety of power converters for use in photovoltaic power systems - Part 3: Particular requirements for electronic devices in combination with photovoltaic elements (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is Part 3 of GB/T 46985 "Safety of Power Conversion Equipment for Photovoltaic Power Generation Systems". GB/T 46985 has been issued.

The following parts were laid out.

---Part 3: Specific requirements for electronic devices connected to photovoltaic components.

This document is equivalent to IEC 62109-3:2020 "Safety of power conversion equipment for photovoltaic power generation systems - Part 3: Relationship with photovoltaic components".

Specific requirements for connected electronic devices.

The following minimal editorial changes have been made to this document.

---The suspension section in Chapter 4 of IEC 62109-3:2020 is incorporated into 4.1.

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.

This document is under the jurisdiction of the National Technical Committee on Standardization of Solar Photovoltaic Energy Systems (SAC/TC90).

Introduction

GB/T 46985 "Safety of Power Conversion Equipment for Photovoltaic Power Generation Systems" sets forth safety requirements for power conversion equipment used in photovoltaic power generation systems.

Requirements were set forth to ensure the safety and reliability of power conversion equipment used in photovoltaic power generation systems, specifying the basic requirements that the equipment should meet.

The summation test method has positive guiding significance for improving the safety of power conversion equipment used in photovoltaic power generation systems. GB/T 46985 is proposed to be developed by...

It consists of the following parts.

---Part 1: General Requirements. This section specifies the general requirements that inverter products must meet, including but not limited to the insulation of the product.

Requirements regarding performance, electrical connections, electromagnetic compatibility, and environmental adaptability.

---Part 2: Inverter-Specific Requirements. The purpose is to specify the requirements for inverters that interact with the grid and for stand-alone inverters.

---Part 3: Specific Requirements for Electronic Devices Connected to Photovoltaic Components. The purpose is to specify the requirements for electronic components and photovoltaic components or photovoltaic...

Products composed of components.

Note. The correspondence between each part and the IEC 62109 series of international standards is as follows.

---Part 1 corresponds to IEC 62109-1:2010;

---Part 2 corresponds to IEC 62109-2:2011;

---Part 3 corresponds to IEC 62109-3:2020.

This document sets forth requirements for products composed of electronic components and photovoltaic elements or photovoltaic modules. For this type of equipment, consideration must be given to Considering the specific security concerns arising from the combination of these two product types, this document outlines the security requirements as follows. [Reference] Other parts of IEC 62109 and photovoltaic module standards such as IEC 61730 define additional tests and requirements for these sub-component product standards.

Modifications to the test procedures in IEC 62109 and IEC 61730 are defined, and methods are provided for applying these tests to photovoltaic modules and electronic component groups.

Comprehensive guidance.

Note. It must be acknowledged that the physical designs of the products covered in this scope may vary considerably. The requirements of this document are expected to evolve to meet the needs of such products.

The unique safety requirements of the product, especially when the photovoltaic elements of the product are not flat-panel structures. For example, this document does not fully describe building-integrated photovoltaics.

Safety requirements for Building-Integrated Photovoltaics (BIPV) and Building-Added Photovoltaics (BAPV) products, although they fall within the scope of this document.

The purpose of this document is to provide additional security for the following types of integrated electronic devices [collectively referred to as component integration devices (MIEs)].

Relevant testing requirements.

a) Type A MIE, where the photovoltaic element, according to GB/T 20047.1-2006 and IEC 61730-2, can function independently of the electronic element as a light source.

The components were evaluated;

b) Type B MIE, wherein the photovoltaic elements, according to IEC 61730-1 and IEC 61730-2, cannot be used independently of electronic components as photovoltaic modules.

An assessment will be conducted.

Products not covered.

Photovoltaic modules that use only one or more bypass diodes as combined or integrated components. These products are covered by IEC 61730-1 and Within the scope of IEC 61730-2.

The scope includes and excludes the following aspects.

All contents of IEC 62109-1:2010 apply. The list of items excluded from the scope has been expanded to include those evaluated according to IEC 61215-1.

Estimate MIE.

Safety of power conversion equipment used in photovoltaic power generation systems Part 3: Electronic Devices Connected to Photovoltaic Components Specific requirements

1 Scope

This document specifies the particular safety requirements for electronic components that are integrated with photovoltaic (PV) modules or systems by mechanical and/or electrical means.

The combination of mechanical and/or electrical methods refers to the sale of the entire combination of electronic equipment and photovoltaic elements as a product. The measurement methods provided in this document...

The test can also be used to assess the compatibility of photovoltaic modules and electronic devices that are sold separately but are expected to be installed closely together.

This document applies to applications that can achieve, but are not limited to, DC-DC or DC-AC power conversion, active diodes, protection, control, monitoring, or communication.

Electronic devices that integrate with photovoltaic modules and provide functions such as communication, specifically designed for use with flat-panel photovoltaic (PV) modules.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Among these, references with dates are...

For this document, only the version corresponding to the specified date applies; for undated references, the latest version (including all amendments) applies.

In this document.

Chapter 2 of IEC 62109-1:2010 and Chapter 2 of IEC 62109-2:2011 are applicable, with the following additions.

GB/T 37410-2019 Technical requirements for junction boxes of ground-mounted solar photovoltaic modules (IEC 62790:2014, MOD) Note. There are no technical differences between the content referenced in GB/T 37410-2019 and the content referenced in IEC 62790:2014.

Note. GB/T 37434-2019 Design qualification and type approval of ground-mounted photovoltaic modules - Part 2: Test procedures (IEC 61215-2:2016, IDT) Note. GB/T 37663.1-2019 Safety qualification of photovoltaic modules - Part 1: Structural requirements (IEC 61730-1:2016, IDT) Note. GB/T 37663.2-2019 Safety qualification of photovoltaic modules - Part 2: Test requirements (IEC 61730-2:2016, IDT) IEC 61853-2:2023 Photovoltaic modules – Performance testing and energy rating – Part 2: Spectral response, angle of incidence and module operating temperature Note. GB/T 37629-2019 Photovoltaic Module Performance Testing and Energy Rating Part 2: Measurement of Spectral Response, Angle of Incidence and Module Operating Temperature (IEC 61853-2:2011, IDT) IEC 62109-1:2010 Safety of power conversion equipment for photovoltaic power generation systems – Part 1: General requirements Note. GB/T 37432-2019 Safety of power conversion equipment for photovoltaic power generation systems - Part 1: General requirements (IEC 62109-1:2010, IDT) IEC 62109-2:2011 Safety of power conversion equipment for photovoltaic power generation systems – Part 2: Particular requirements for inverters Note. GB/T 37431-2019 Safety of power conversion equipment for photovoltaic power generation systems - Part 2: Particular requirements for inverters (IEC 62109-2.

2011, IDT)