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BS EN IEC 62446-2:2020

BS EN IEC 62446-2:2020

$198.66

Photovoltaic (PV) systems. Requirements for testing, documentation and maintenance – Grid connected systems. Maintenance of PV systems

Published By Publication Date Number of Pages
BSI 2020 58
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This clause of IEC 62446-1:2016 is applicable with the following exception:

Addition:

This Part 2 of IEC 62446 describes basic preventive, corrective, and performance related maintenance requirements and recommendations for grid-connected PV systems. The maintenance procedures cover:

  • Basic maintenance of the system components and connections for reliability, safety and fire prevention

  • Measures for corrective maintenance and troubleshooting

  • Worker safety

This document also addresses maintenance activities for maximizing anticipated performance such as module cleaning and upkeep of vegetation. Special considerations unique to rooftop or ground-mounted systems are summarized. This document does not cover off-grid systems or systems that include batteries or other energy storage technologies; however, parts may be applicable to the PV circuits of those systems.

This document also does not cover maintenance of medium and high voltage a.c. equipment that are sometimes integral to larger scale systems, as those requirements are not specific to PV systems.

Maintenance of PV systems is often lumped into the catch-all term operations and maintenance (O&M.) This document does not address business or management operational processes (e.g. forecasting, utility pricing incentives, etc.) or other considerations driven by factors outside of basic system working condition, safety and performance.

The confirmation of a system’s compliance with the appropriate design and installation standards is covered in Part 1 and takes place during initial project commissioning.

The objectives of this document are to:

  • Identify a baseline set of maintenance requirements which may differ by system type (residential, commercial, utility scale), owner, or financing requirements.

  • Identify additional maintenance steps that are recommended or optional.

  • Identify factors to be used to determine appropriate maintenance intervals.

  • Ensure that remote diagnostic methods are allowed as means for periodic verification, problem identification and early failure detection.

  • Ensure that alternate means of achieving maintenance related requirements are allowed to accommodate for innovation, manufacturer specific methods, evolving customer requirements, etc.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 INTRODUCTION
12 1 Scope
13 2 Normative references
3 Terms and definitions
15 4 System documentation requirements
4.1 General
4.8 Operation and maintenance information
16 4.10 Performance benchmarking
4.11 Documentation of records
5 Verification
6 Test procedures – Category 1
7 Test procedures – Category 2
8 Test procedures – Additional tests
17 9 Verification reports
10 Maintenance protocols
10.1 General
10.2 Verification intervals and triggers
18 Table 3 – Verification and maintenance tasks and basis for determining task intervals
22 10.3 Other considerations for determining specific verification intervals
11 Verification tasks
11.1 General
11.2 General site visual inspection
11.2.1 All systems
23 11.2.2 Rooftop systems
11.2.3 Ground-mount systems
11.3 Component inspection and safety related maintenance
11.3.1 Inverter and main electrical equipment pad
11.3.2 Combiner boxes, disconnects and isolators
25 11.3.3 Modules
11.3.4 PV connectors
26 11.3.5 Wiring
11.3.6 Mounting system
27 11.3.7 Conduits and cable trays
11.3.8 Weather station
11.4 Performance related maintenance
11.4.1 General
11.4.2 Wiring connection resistance
11.4.3 Shade evaluation
11.4.4 Module string or wiring harness testing
29 11.4.5 Vegetation management
11.4.6 Soiling and array cleaning
31 12 Troubleshooting and corrective maintenance
12.1 General
12.2 Shutdown of equipment in response to hazardous failures
12.3 Troubleshooting non-hazardous failures
12.4 Troubleshooting incident or event-triggered issues
32 12.5 Diagnosing performance related issues
33 13 Additional procedures
13.1 General
13.2 Safety procedures
13.2.1 General
13.2.2 Safe operation of switch disconnectors
13.3 Isolation procedures
13.3.1 Emergency shutdown
34 13.3.2 Non-emergency shutdown
35 13.4 Inspection and preventive maintenance procedures
13.4.1 Inverter manufacturer specific procedures
36 13.4.2 Tracker manufacturer specific procedures
13.4.3 Data acquisition system specific procedures
37 13.5 Electrical test procedures
13.5.1 Earth fault testing
39 13.5.2 Fuse tests
13.5.3 Bypass diode tests
40 13.6 Diagnostic procedures
13.6.1 Validation of data acquisition systems (DAS)
43 13.6.2 Inverter diagnostics
Table 4 – Common reported inverter errors
45 Annex E (normative)Safety considerations
E.1 Qualified persons
E.2 General safety considerations
46 E.3 Personal protective equipment
E.4 Isolation procedures
E.5 Lock-out tag-out
47 E.6 PV specific signs and labelling
48 Annex F (informative)Example preventive maintenance schedule
F.1 General
F.2 Example system description
49 Table F.1 – Preventive maintenance schedule for XYZ plant
55 Annex G (informative)PV system operations
56 Bibliography

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BS EN IEC 62446-2:2020
$198.66