BS EN IEC 62688:2018
$215.11
Concentrator photovoltaic (CPV) modules and assemblies. Safety qualification (IEC 62688:2017)
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 86 |
IEC 62688:2017 describes the fundamental construction and testing requirements for Concentrator Photovoltaic (CPV) modules and assemblies in order to provide safe electrical and mechanical operation during their expected lifetime. Specific topics are provided to assess the prevention of electrical shock, fire hazards, and personal injury due to mechanical and environmental stresses. This document attempts to define the basic requirements for various application classes of concentrator photovoltaic modules and assemblies, but does not encompass all national and regional codes. This document is designed so that its test sequence can coordinate with those of IEC 62108, so that a single set of samples may be used to perform both the safety and performance evaluation of a CPV module and assembly.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 9 | CONTENTS |
| 15 | FOREWORD |
| 17 | 1 Scope 2 Normative references |
| 20 | 3 Terms and definitions |
| 22 | 4 Sampling |
| 24 | Figures Figure 1 – Schematic of a point focus dish PV concentrator |
| 25 | Figure 2 – Schematic of a linear focus trough PV concentrator |
| 26 | Figure 3 – Schematic of a point focus Fresnel lens PV concentrator |
| 27 | 5 Marking 5.1 Nameplate Figure 4 – Schematic of a linear focus Fresnel lens PV concentrator |
| 28 | 5.2 Hazards 5.2.1 High intensity light 5.2.2 Field connections Figure 5 – Field connection warning label |
| 29 | 5.2.3 Hot surfaces 6 Report Figure 6 – Symbol for hot surface can be used Tables Table 1 – Touch temperature limits |
| 30 | 7 Requirements for construction – Module application classes 7.1 General 7.2 Class II – general access, hazardous voltage, current and power, double insulated/reinforced insulation 7.2.1 Electrical output 7.2.2 Protection |
| 31 | 7.2.3 Application 7.3 Class 0 – Restricted access, hazardous voltage, current and power basic insulation only with no protection from faults 7.3.2 Protection 7.3.3 Application 7.4 Class 0-X – additional fire or concentrated light hazard 7.5 Class III – general access limited voltage, current and power 7.5.1 Electrical output 7.5.2 Protection 7.5.3 Application |
| 32 | 7.6 Fire safety 8 Construction 9 Modifications 10 Requirements for supplied documents 10.1 General 10.2 Fire 10.3 Electrical |
| 33 | 10.4 Mechanical 10.5 Temperature 10.6 Field assembly 10.7 Component ratings 11 Overcurrent protection |
| 34 | 12 Metal parts 12.1 Combinations of metals 12.2 Corrosion protection 12.3 Edges 13 Polymeric materials 13.1 General 13.1.1 Overview 13.1.2 Solid insulation and cemented joints |
| 35 | 13.1.3 Requirements for polymers |
| 36 | 13.1.4 Operational categories for CPV modules and assemblies |
| 37 | 13.2 Polymers serving as an enclosure for live parts (such as a junction box, connector, or plug) 13.3 Polymers serving in direct support of live parts (such as integrated terminals and potting compounds) 13.4 Polymers serving as an outer surface of a receiver (such as a front sheet or back sheet on a flat-plate profile receiver in a medium-X assembly) |
| 38 | 13.5 Polymers serving as an internal electrical barrier providing the sole insulation between live parts 13.6 Polymers serving as encapsulants 13.7 Polymers serving as adhesives for attachment (such as for a junction box) 13.8 Polymers serving as moisture barriers (such as edge sealants) 13.9 Polymers serving as gaskets or seals (such as with front glass) |
| 39 | 13.10 Polymers serving as frames (such as with flat-plate profile medium-concentration receivers) 13.11 Polymers serving as CPV optics 13.12 Polymers exposed to sunlight, serving as a mechanical support, not functioning in categories 13.2 to 13.11 13.13 Polymers exposed to concentrated sunlight 14 Internal wiring and current-carrying parts 14.1 General 14.2 Internal wiring 14.3 Splices |
| 40 | 14.4 Mechanical securement 15 Connections 15.1 Field connections – general requirements 15.2 Field wiring terminals |
| 41 | 15.3 Connectors 15.4 Output lead or cables 16 Bonding and grounding 16.1 General Table 2 – Sizes of terminals for supply conductors |
| 42 | 16.2 Lightning protection 17 Protection against electric shock and energy hazards 17.1 General 17.2 Fault conditions |
| 43 | 17.3 Protection against electric shock 17.3.1 General 17.3.2 Module classification |
| 44 | 17.3.3 Creepage and clearance distances |
| 45 | Table 3 – Minimum acceptable clearance distances Table 4 – Multiplication factors for clearances of equipment ratedfor operation at altitudes up to 5 000 m |
| 46 | Table 5 – Minimum creepage distances for basic insulation Table 6 – Minimum creepage distances for reinforced insulation |
| 47 | 17.3.4 Degrees of pollution in the micro-environment 17.3.5 Cemented joints Table 7 – Rated impulse voltage |
| 49 | 18 Field wiring compartments with covers 18.1 General 18.2 Strain relief 18.3 Sharp edges 18.4 Conduit applications – Metallic 18.5 Conduit applications – Non-metallic |
| 50 | 19 Requirements for testing – Test categories 19.1 General 19.2 Preconditioning tests Table 8 – Wall thickness of polymeric boxes intended for conduit Table 9 – Preconditioning tests |
| 51 | 19.3 General inspection 19.4 Electrical shock hazard 19.5 Fire hazard Table 10 – General inspection tests Table 11 – Electrical shock hazard tests Table 12 – Fire hazard tests |
| 52 | 19.6 Mechanical stress 20 Testing 20.1 General Table 13 – Fire hazard test applicability Table 14 – Mechanical stress tests |
| 54 | Figure 7 – IEC 62688 safety test plan for CPV modules (IEC 62108:2016) |
| 55 | Figure 8 – Combined IEC 62108:2016 and IEC 62688 test plan for CPV modules |
| 56 | Figure 9 – IEC 62688 safety test plan for CPV assemblies (IEC 62108:2016) |
| 57 | 20.2 Visual inspection 20.2.1 General 20.2.2 Requirements Figure 10 – Combined IEC 62108:2016 andIEC 62688 test plan for CPV assemblies |
| 58 | 20.3 Accessibility test 20.3.1 Purpose 20.3.2 Apparatus 20.3.3 Procedure 20.3.4 Requirements 20.4 Grounding/Bonding path continuity test 20.4.1 Purpose 20.4.2 Procedure 20.4.3 Requirements 20.5 Dielectric voltage withstand test 20.5.1 Purpose |
| 59 | 20.5.2 Procedure 20.5.3 Requirements 20.6 Wet insulation test 20.6.1 Purpose 20.6.2 Procedure 20.6.3 Requirements |
| 60 | 20.7 Reverse current overload 20.7.1 Purpose 20.7.2 Procedure 20.7.3 Requirements 20.8 Thermal cycling 20.8.1 General |
| 61 | 20.8.2 Purpose 20.8.3 Procedure 20.8.4 Requirements 20.9 Humidity freeze 20.9.1 General 20.9.2 Purpose 20.9.3 Procedure 20.9.4 Requirements 20.10 Damp heat 20.10.1 General 20.10.2 Purpose |
| 62 | 20.10.3 Procedure 20.10.4 Requirements 20.11 Bypass diode thermal 20.11.1 Purpose 20.11.2 Special test sample 20.11.3 Procedure 20.11.4 Requirements 20.12 Hot spot endurance 20.12.1 General |
| 63 | 20.12.2 Procedure 20.12.3 Requirements 20.13 Off-axis beam damage 20.13.1 General 20.13.2 Purpose 20.13.3 Special case 20.13.4 Procedure 20.13.5 Requirements |
| 64 | 20.14 Water spray 20.14.1 General 20.14.2 Purpose 20.14.3 Procedure 20.14.4 Requirements 20.15 Mechanical load 20.15.1 Purpose |
| 65 | 20.15.2 Procedure 20.15.3 Requirements 20.16 Robustness of terminations 20.16.1 Purpose 20.16.2 Types of terminations 20.16.3 Procedure 20.16.4 Requirements 20.17 Impulse voltage 20.17.1 Purpose |
| 66 | Figure 11 – Waveform of the impulse voltage test Table 15 – Impulse voltage versus maximum system voltage |
| 67 | 20.17.2 Requirements 20.18 CPV temperature test 20.18.1 Purpose 20.18.2 Test apparatus 20.18.3 Procedure |
| 68 | 20.18.4 Requirements |
| 69 | 20.19 Fire test recommendation for CPV modules 20.19.1 General 20.19.2 Burning brand fire tests Table 16 – Brand size and its number |
| 71 | 20.20 CPV electrical parameters 20.20.1 General 20.20.2 Maximum open-circuit voltage 20.20.3 Maximum short-circuit current |
| 72 | 20.20.4 The procedure for calculating maximum power (Max P) is to be in accordance with the following: 20.21 Outdoor exposure 20.21.1 General 20.21.2 Purpose 20.21.3 Procedure 20.21.4 Requirements |
| 73 | 20.22 Sharp edge test 20.22.1 General 20.22.2 Purpose 20.22.3 Procedure 20.22.4 Requirements 20.23 Blocked heat sink test 20.23.1 Purpose |
| 74 | 20.23.2 Procedure 20.23.3 Requirements 20.24 Locked rotor test 20.24.1 Purpose 20.24.2 Procedure |
| 75 | 20.24.3 Requirements |
| 76 | Annex A (informative)Bimetallic junction Table A.1 – Voltages developed on bimetallic junction (IEC 60943:1998, Table 3) |
| 77 | Annex B (normative)Recommendations for testing of modules from production B.1 General B.2 Module output power B.3 Insulation test B.4 Wet insulation test |
| 78 | B.5 Visual inspection B.6 Cable connections B.7 Bypass diodes B.8 Ground continuity |
| 79 | Annex C (normative)Alternative test method to electricity safety of CPV receivers C.1 General C.2 Specifications for the proposed test method |
| 80 | C.3 Test method C.3.1 Overview C.3.2 Product identity C.3.3 Manufacturer C.3.4 System number C.4 Test procedure C.4.1 Physical background Figure C.1 – Decision chart of the alternative test Figure C.2 – Formula (C.1) |
| 81 | C.4.2 Sampling C.4.3 Marking Figure C.3 – Example of the acceleration of the breakdown voltage degradation by the voltage stress |
| 82 | C.4.4 Test procedure Table C.1 – Maximum acceptable testing time |
| 83 | C.4.5 Pass criteria Figure C.4 – Fitting to the power function in the double logarithmic chart |
| 84 | Bibliography |
