1、 IEC 62688 Edition 1.0 2017-09 INTERNATIONAL STANDARD Concentrator photovoltaic (CPV) modules and assemblies Safety qualification IEC 62688:2017-09(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no pa
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10、ve us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 62688 Edition 1.0 2017-09 INTERNATIONAL STANDARD Concentrator photovoltaic (CPV) modules and assemblies Safety qualification INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 27
11、.160 ISBN 978-2-8322-4719-8 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC 62688:2017 IEC 2017 CONTENTS FOREWORD . 8 1 Scope 10 2 Normative references 10 3 Terms and defin
12、itions 13 4 Sampling . 15 5 Marking . 20 5.1 Nameplate 20 5.2 Hazards 21 5.2.1 High intensity light . 21 5.2.2 Field connections. 21 5.2.3 Hot surfaces 22 6 Report . 22 7 Requirements for construction Module application classes . 23 7.1 General . 23 7.2 Class II general access, hazardous voltage, cu
13、rrent and power, double insulated/reinforced insulation. 23 7.2.1 Electrical output . 23 7.2.2 Protection 23 7.2.3 Application . 24 7.3 Class 0 Restricted access, hazardous voltage, current and power basic insulation only with no protection from faults . 24 7.3.1 Electrical output . 24 7.3.2 Protect
14、ion 24 7.3.3 Application . 24 7.4 Class 0-X additional fire or concentrated light hazard . 24 7.5 Class III general access limited voltage, current and power . 24 7.5.1 Electrical output . 24 7.5.2 Protection 24 7.5.3 Application . 24 7.6 Fire safety. 25 8 Construction 25 9 Modifications . 25 10 Req
15、uirements for supplied documents . 25 10.1 General . 25 10.2 Fire . 25 10.3 Electrical . 25 10.4 Mechanical . 26 10.5 Temperature . 26 10.6 Field assembly 26 10.7 Component ratings 26 11 Overcurrent protection . 26 12 Metal parts 27 12.1 Combinations of metals . 27 12.2 Corrosion protection . 27 12.
16、3 Edges . 27 13 Polymeric materials . 27 IEC 62688:2017 IEC 2017 3 13.1 General . 27 13.1.1 Overview . 27 13.1.2 Solid insulation and cemented joints 27 13.1.3 Requirements for polymers 28 13.1.4 Operational categories for CPV modules and assemblies 29 13.2 Polymers serving as an enclosure for live
17、parts (such as a junction box, connector, or plug) 30 13.3 Polymers serving in direct support of live parts (such as integrated terminals and potting compounds) 30 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 mediu
18、m-X assembly) 30 13.5 Polymers serving as an internal electrical barrier providing the sole insulation between live parts . 31 13.6 Polymers serving as encapsulants 31 13.7 Polymers serving as adhesives for attachment (such as for a junction box) . 31 13.8 Polymers serving as moisture barriers (such
19、 as edge sealants) 31 13.9 Polymers serving as gaskets or seals (such as with front glass) 31 13.10 Polymers serving as frames (such as with flat-plate profile medium- concentration receivers) 32 13.11 Polymers serving as CPV optics . 32 13.12 Polymers exposed to sunlight, serving as a mechanical su
20、pport, not functioning in categories 13.2 to 13.11 32 13.13 Polymers exposed to concentrated sunlight 32 14 Internal wiring and current-carrying parts . 32 14.1 General . 32 14.2 Internal wiring . 32 14.3 Splices 32 14.4 Mechanical securement 33 15 Connections 33 15.1 Field connections general requi
21、rements . 33 15.2 Field wiring terminals 33 15.3 Connectors . 34 15.4 Output lead or cables 34 16 Bonding and grounding 34 16.1 General . 34 16.2 Lightning protection 35 17 Protection against electric shock and energy hazards 35 17.1 General . 35 17.2 Fault conditions 35 17.3 Protection against elec
22、tric shock . 36 17.3.1 General . 36 17.3.2 Module classification . 36 17.3.3 Creepage and clearance distances 37 17.3.4 Degrees of pollution in the micro-environment . 40 17.3.5 Cemented joints . 40 18 Field wiring compartments with covers 42 18.1 General . 42 18.2 Strain relief . 42 18.3 Sharp edge
23、s . 42 18.4 Conduit applications Metallic 42 4 IEC 62688:2017 IEC 2017 18.5 Conduit applications Non-metallic 42 19 Requirements for testing Test categories 43 19.1 General . 43 19.2 Preconditioning tests 43 19.3 General inspection 44 19.4 Electrical shock hazard . 44 19.5 Fire hazard . 44 19.6 Mech
24、anical stress . 45 20 Testing 45 20.1 General . 45 20.2 Visual inspection . 50 20.2.1 General . 50 20.2.2 Requirements 50 20.3 Accessibility test . 51 20.3.1 Purpose . 51 20.3.2 Apparatus 51 20.3.3 Procedure 51 20.3.4 Requirements 51 20.4 Grounding/Bonding path continuity test . 51 20.4.1 Purpose .
25、51 20.4.2 Procedure 51 20.4.3 Requirements 51 20.5 Dielectric voltage withstand test 51 20.5.1 Purpose . 51 20.5.2 Procedure 52 20.5.3 Requirements 52 20.6 Wet insulation test 52 20.6.1 Purpose . 52 20.6.2 Procedure 52 20.6.3 Requirements 52 20.7 Reverse current overload 53 20.7.1 Purpose . 53 20.7.
26、2 Procedure 53 20.7.3 Requirements 53 20.8 Thermal cycling. 53 20.8.1 General . 53 20.8.2 Purpose . 54 20.8.3 Procedure 54 20.8.4 Requirements 54 20.9 Humidity freeze . 54 20.9.1 General . 54 20.9.2 Purpose . 54 20.9.3 Procedure 54 20.9.4 Requirements 54 20.10 Damp heat 54 20.10.1 General . 54 20.10
27、.2 Purpose . 54 20.10.3 Procedure 55 20.10.4 Requirements 55 IEC 62688:2017 IEC 2017 5 20.11 Bypass diode thermal 55 20.11.1 Purpose . 55 20.11.2 Special test sample . 55 20.11.3 Procedure 55 20.11.4 Requirements 55 20.12 Hot spot endurance . 55 20.12.1 General . 55 20.12.2 Procedure 56 20.12.3 Requ
28、irements 56 20.13 Off-axis beam damage 56 20.13.1 General . 56 20.13.2 Purpose . 56 20.13.3 Special case 56 20.13.4 Procedure 56 20.13.5 Requirements 56 20.14 Water spray 57 20.14.1 General . 57 20.14.2 Purpose . 57 20.14.3 Procedure 57 20.14.4 Requirements 57 20.15 Mechanical load 57 20.15.1 Purpos
29、e . 57 20.15.2 Procedure 58 20.15.3 Requirements 58 20.16 Robustness of terminations . 58 20.16.1 Purpose . 58 20.16.2 Types of terminations 58 20.16.3 Procedure 58 20.16.4 Requirements 58 20.17 Impulse voltage. 58 20.17.1 Purpose . 58 20.17.2 Requirements 60 20.18 CPV temperature test 60 20.18.1 Pu
30、rpose . 60 20.18.2 Test apparatus 60 20.18.3 Procedure 60 20.18.4 Requirements 61 20.19 Fire test recommendation for CPV modules 62 20.19.1 General . 62 20.19.2 Burning brand fire tests . 62 20.20 CPV electrical parameters 64 20.20.1 General . 64 20.20.2 Maximum open-circuit voltage . 64 20.20.3 Max
31、imum short-circuit current 64 20.20.4 The procedure for calculating maximum power (Max P) is to be in accordance with the following: . 65 20.21 Outdoor exposure . 65 20.21.1 General . 65 20.21.2 Purpose . 65 6 IEC 62688:2017 IEC 2017 20.21.3 Procedure 65 20.21.4 Requirements 65 20.22 Sharp edge test
32、 66 20.22.1 General . 66 20.22.2 Purpose . 66 20.22.3 Procedure 66 20.22.4 Requirements 66 20.23 Blocked heat sink test . 66 20.23.1 Purpose . 66 20.23.2 Procedure 67 20.23.3 Requirements 67 20.24 Locked rotor test . 67 20.24.1 Purpose . 67 20.24.2 Procedure 67 20.24.3 Requirements 68 Annex A (infor
33、mative) Bimetallic junction . 69 Annex B (normative) Recommendations for testing of modules from production . 70 B.1 General . 70 B.2 Module output power. 70 B.3 Insulation test . 70 B.4 Wet insulation test 70 B.5 Visual inspection . 71 B.6 Cable connections 71 B.7 Bypass diodes 71 B.8 Ground contin
34、uity 71 Annex C (normative) Alternative test method to electricity safety of CPV receivers 72 C.1 General . 72 C.2 Specifications for the proposed test method 72 C.3 Test method 73 C.3.1 Overview . 73 C.3.2 Product identity . 73 C.3.3 Manufacturer . 73 C.3.4 System number 73 C.4 Test procedure 73 C.
35、4.1 Physical background 73 C.4.2 Sampling . 74 C.4.3 Marking . 74 C.4.4 Test procedure 75 C.4.5 Pass criteria 76 Bibliography 77 Figure 1 Schematic of a point focus dish PV concentrator 17 Figure 2 Schematic of a linear focus trough PV concentrator . 18 Figure 3 Schematic of a point focus Fresnel le
36、ns PV concentrator . 19 Figure 4 Schematic of a linear focus Fresnel lens PV concentrator 20 Figure 5 Field connection warning label . 21 Figure 6 Symbol for hot surface can be used . 22 IEC 62688:2017 IEC 2017 7 Figure 7 IEC 62688 safety test plan for CPV modules (IEC 62108:2016) 47 Figure 8 Combin
37、ed IEC 62108:2016 and IEC 62688 test plan for CPV modules . 48 Figure 9 IEC 62688 safety test plan for CPV assemblies (IEC 62108:2016) 49 Figure 10 Combined IEC 62108:2016 and IEC 62688 test plan for CPV assemblies . 50 Figure 11 Waveform of the impulse voltage test . 59 Figure C.1 Decision chart of
38、 the alternative test . 73 Figure C.2 Formula (C.1) . 73 Figure C.3 Example of the acceleration of the breakdown voltage degradation by the voltage stress . 74 Figure C.4 Fitting to the power function in the double logarithmic chart 76 Table 1 Touch temperature limits . 22 Table 2 Sizes of terminals
39、 for supply conductors 34 Table 3 Minimum acceptable clearance distances 38 Table 4 Multiplication factors for clearances of equipment rated for operation at altitudes up to 5 000 m . 38 Table 5 Minimum creepage distances for basic insulation 39 Table 6 Minimum creepage distances for reinforced insu
40、lation . 39 Table 7 Rated impulse voltage . 40 Table 8 Wall thickness of polymeric boxes intended for conduit . 43 Table 9 Preconditioning tests . 43 Table 10 General inspection tests 44 Table 11 Electrical shock hazard tests . 44 Table 12 Fire hazard tests . 44 Table 13 Fire hazard test applicabili
41、ty 45 Table 14 Mechanical stress tests . 45 Table 15 Impulse voltage versus maximum system voltage 59 Table 16 Brand size and its number . 62 Table A.1 Voltages developed on bimetallic junction (IEC 60943:1998, Table 3) 69 Table C.1 Maximum acceptable testing time 75 8 IEC 62688:2017 IEC 2017 INTERN
42、ATIONAL ELECTROTECHNICAL COMMISSION _ CONCENTRATOR PHOTOVOLTAIC (CPV) MODULES AND ASSEMBLIES SAFETY QUALIFICATION FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committe
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