Technical requirements for photovoltaic gird-connected inverter
1 Scope
This standard specifies the technical requirements related to classification, environmental conditions, safety requirements, electrical performance, electromagnetic compatibility, marking, documentation, packaging, transportation, and storage of photovoltaic grid-connected inverter.
This standard is applicable to grid-connected photovoltaic inverters.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 4798.2 Environmental conditions existing in the application of electric and electronic products - Part 2: Transportation
GB/T 5169.11 Fire hazard testing for electric and electronic products - Part 11: Glowing/hot-wire based test methods - Glow-wire flammability test method for end-products (GWEPT)
GB/T 12326 Power quality - Voltage fluctuation and flicker
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543 Power quality - Three-phase voltage unbalance
GB/T 16935.1 Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests
GB/T 16935.3 Insulation coordination for equipment within low-voltage systems - Part 3: Use of coating, potting or moulding for protection against pollution
GB/T 16935.4 Insulation coordination for equipment within low voltage systems - Part 4: Consideration of high-frequency voltage stress
GB/T 17626.2 Electromagnetic compatibility - Testing and measurement techniques - Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility - Testing and measurement techniques - Radiated radio-frequency electromagnetic field immunity test
GB/T 17626.4 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test
GB/T 17626.6 Electromagnetic compatibility - Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields
GB/T 17626.8 Electromagnetic compatibility - Testing and measurement techniques - Power frequency magnetic field immunity test
GB/T 19964 Technical requirements for connecting photovoltaic power station to power system
GB/T 24337 Power quality - Interharmonics in public supply network
GB/T 29319 Technical requirements for connecting photovoltaic power system to distribution network
GB/T 37409 Testing specification for photovoltaic grid-connected inverter
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
decisive voltage classification; DVC
highest continuous voltage class that can be generated between any live parts under the most severe operating conditions
3.2
protective extra-low voltage (PELV) system
electrical system in which the r.m.s of an a.c. voltage does not exceed 50V or the d.c. voltage does not exceed 120V under normal operation or single fault conditions (excluding ground faults in other circuits), also called PELV system
3.3
safety extra-low voltage (SELV) system
electrical system in which the r.m.s of an a.c. voltage does not exceed 50V or the d.c. voltage does not exceed 120V under normal operation or single fault conditions (including ground faults in other circuits), also called SELV system
3.4
protective bonding
electrical connection that maintains electrical continuity between accessible conductive components or protective shielding and protective conductor terminals
3.5
protective separation
structure or measure that separates circuits of different protection levels from each other through basic insulation and supplementary insulation or other equivalent protective measures (such as strengthening insulation or protecting impedance)
3.6
functional insulation; FI
insulation measures to ensure the normal operation of equipment, which cannot protect against the danger of electric shock, but can reduce the possibility of ignition or fire
3.7
basic insulation
insulation that can only provide basic protection against electric shock under normal working conditions
3.8
supplementary insulation
independent insulation added in addition to the basic insulation, which can provide electric shock protection in the event of basic insulation failure
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Inverter classification 5 Environmental conditions 6 Safety 7 Electrical property 8 Electromagnetic compatibility 9 Marking and documentation 10 Packaging, transportation and storage 11 Testing content Annex A (Normative) Equipment marking symbol Annex B (Normative) Correction of electrical clearances at different heights Annex C (Normative) Calculation method for power control response time
Technical requirements for photovoltaic gird-connected inverter
1 Scope
This standard specifies the technical requirements related to classification, environmental conditions, safety requirements, electrical performance, electromagnetic compatibility, marking, documentation, packaging, transportation, and storage of photovoltaic grid-connected inverter.
This standard is applicable to grid-connected photovoltaic inverters.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 4798.2 Environmental conditions existing in the application of electric and electronic products - Part 2: Transportation
GB/T 5169.11 Fire hazard testing for electric and electronic products - Part 11: Glowing/hot-wire based test methods - Glow-wire flammability test method for end-products (GWEPT)
GB/T 12326 Power quality - Voltage fluctuation and flicker
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543 Power quality - Three-phase voltage unbalance
GB/T 16935.1 Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests
GB/T 16935.3 Insulation coordination for equipment within low-voltage systems - Part 3: Use of coating, potting or moulding for protection against pollution
GB/T 16935.4 Insulation coordination for equipment within low voltage systems - Part 4: Consideration of high-frequency voltage stress
GB/T 17626.2 Electromagnetic compatibility - Testing and measurement techniques - Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility - Testing and measurement techniques - Radiated radio-frequency electromagnetic field immunity test
GB/T 17626.4 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test
GB/T 17626.6 Electromagnetic compatibility - Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields
GB/T 17626.8 Electromagnetic compatibility - Testing and measurement techniques - Power frequency magnetic field immunity test
GB/T 17799.2 Electromagnetic compatibility - Generic standards - Immunity for industrial environments
GB/T 19964 Technical requirements for connecting photovoltaic power station to power system
GB/T 24337 Power quality - Interharmonics in public supply network
GB/T 29319 Technical requirements for connecting photovoltaic power system to distribution network
GB/T 37409 Testing specification for photovoltaic grid-connected inverter
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
decisive voltage classification; DVC
highest continuous voltage class that can be generated between any live parts under the most severe operating conditions
3.2
protective extra-low voltage (PELV) system
electrical system in which the r.m.s of an a.c. voltage does not exceed 50V or the d.c. voltage does not exceed 120V under normal operation or single fault conditions (excluding ground faults in other circuits), also called PELV system
3.3
safety extra-low voltage (SELV) system
electrical system in which the r.m.s of an a.c. voltage does not exceed 50V or the d.c. voltage does not exceed 120V under normal operation or single fault conditions (including ground faults in other circuits), also called SELV system
3.4
protective bonding
electrical connection that maintains electrical continuity between accessible conductive components or protective shielding and protective conductor terminals
3.5
protective separation
structure or measure that separates circuits of different protection levels from each other through basic insulation and supplementary insulation or other equivalent protective measures (such as strengthening insulation or protecting impedance)
3.6
functional insulation; FI
insulation measures to ensure the normal operation of equipment, which cannot protect against the danger of electric shock, but can reduce the possibility of ignition or fire
3.7
basic insulation
insulation that can only provide basic protection against electric shock under normal working conditions
3.8
supplementary insulation
independent insulation added in addition to the basic insulation, which can provide electric shock protection in the event of basic insulation failure
Contents of GB/T 37408-2019
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Inverter classification
5 Environmental conditions
6 Safety
7 Electrical property
8 Electromagnetic compatibility
9 Marking and documentation
10 Packaging, transportation and storage
11 Testing content
Annex A (Normative) Equipment marking symbol
Annex B (Normative) Correction of electrical clearances at different heights
Annex C (Normative) Calculation method for power control response time
