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BS EN IEC 62790:2020 Junction boxes for photovoltaic modules. Safety requirements and tests, 2020
- undefined
- Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
- English [Go to Page]
- CONTENTS
- FOREWORD
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Constructional requirements and performance [Go to Page]
- 4.1 General
- 4.2 Marking and identification [Go to Page]
- 4.2.1 Identification
- 4.2.2 Marking
- 4.2.3 Technical documentation
- 4.3 Protection against electric shock
- 4.4 Terminations, connecting devices and connection methods
- 4.5 Connectors
- 4.6 Cables
- 4.7 Resistance to ageing
- 4.8 General design
- 4.9 Degree of protection (IP)
- 4.10 Dielectric strength
- 4.11 Range of ambient temperature
- 4.12 Cable anchorage
- 4.13 Mechanical strength
- 4.14 Insulation [Go to Page]
- 4.14.1 Type of insulation
- 4.14.2 Basic insulation
- 4.14.3 Supplementary insulation
- 4.14.4 Double insulation
- 4.14.5 Reinforced insulation
- Tables [Go to Page]
- Table 1 – Required type of insulation
- 4.15 Clearances and creepage distances [Go to Page]
- 4.15.1 Clearances
- 4.15.2 Creepage distances
- Table 2 – Rated impulse voltages and minimum clearances
- Table 3 – Creepage distances for basic insulation
- 4.16 Insulation parts [Go to Page]
- 4.16.1 Outer accessible parts
- 4.16.2 Inner parts keeping active parts in position
- 4.17 Current carrying parts and resistance against corrosion
- 4.18 Sealing
- 4.19 Bypass-diode
- 4.20 Knock-out inlets (outlets) intended to be removed by mechanical impact
- 5 Tests [Go to Page]
- 5.1 General
- 5.2 Preparation of specimens
- Table 4 – Number of specimens
- Table 5 – Values of torque for screw-type clamping units
- 5.3 Performance of tests [Go to Page]
- 5.3.1 General
- 5.3.2 Durability of marking
- 5.3.3 Fixing of lid on rewirable junction box
- 5.3.4 Protection against electric shock
- 5.3.5 Measurement of clearances and creepage distances
- 5.3.6 Dielectric strength
- 5.3.7 Resistance to corrosion
- 5.3.8 Mechanical strength at lower temperatures
- 5.3.9 Thermal cycle test (IEC 60068-2-14:2009, Test Nb)
- 5.3.10 Damp heat test
- 5.3.11 Weather resistance test
- 5.3.12 Flammability class
- 5.3.13 Ball pressure test
- 5.3.14 Glow wire test
- 5.3.15 Resistance against ageing
- 5.3.16 Wet leakage current test
- 5.3.17 Humidity freeze test
- 5.3.18 Bypass diode thermal test
- 5.3.19 Test of terminations and connection methods
- 5.3.20 Knock-out inlets (outlets) intended to be removed by mechanical impact
- 5.3.21 Test of cord anchorage
- Table 6 – Pull forces for cord anchorage [Go to Page]
- 5.3.22 Retention on the mounting surface
- 5.3.23 Reverse current test at junction box
- Table 7 – Values for torsion test
- 5.4 Test schedule
- Table 8 – Marking, information, documentation, test group A
- Table 9 – Material test, test group B (single tests)
- Table 10 – Constructional requirements, test group C (single tests)
- Table 11 – Mechanical tests, test group D (single tests)
- Table 12 – Test sequence I, test group E (tests to be performed consecutively in this order)
- Table 13 – Test sequence II, test group F (tests to be performed consecutively in this order)
- Table 14 – Test sequence III, test group G (tests to be performed consecutively in this order)
- Table 15 – Test sequence IV, test group H (tests to be performed consecutively in this order)
- Table 16 – Reverse current test, test group I
- Figures [Go to Page]
- Figure 1 – Thermal cycling test – Temperature and applied current profile
- Table 17 – Test sequence V, test group J (tests to be performed consecutively in this order)
- Figure 2 – Humidity-freeze cycle
- Figure 3 – Typical arrangement for the cable anchorage pull test
- Figure 4 – Typical arrangement for torsion test
- Figure 5 – Typical arrangement for flammability test in accordance with 5.3.12.2
- Figure 6 – Measurement of voltage drop
- Figure 7 – Bypass diode thermal test
- Figure 8 – Proper attachment of 5 N weight to junction box
- Annex A (informative) Symbol "Do not disconnect under load" [Go to Page]
- Figure A.1 – Symbol "DO NOT DISCONNECT UNDER LOAD"
- Figure A.2 – Symbol "DO NOT DISCONNECT UNDER LOAD" (IEC 60417-6070:2011-06)
- Annex B (normative) Qualification of conformal coatings for protection against pollution [Go to Page]
- B.1 General
- B.2 Technical properties
- B.3 Qualification of coatings
- Table B.1 – Test parameters, test conditions and test procedures
- Table B.2 – Test sequence and conformity check (tests to be performed consecutively in this order)
- Annex C (normative) Measurement of clearances and creepage distances [Go to Page]
- Table C.1 – Dimensions of X
- Figure C.1 – Examples of methods of measuring clearances and creepage distances
- Bibliography [Go to Page]