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Proceedings of the webinar dt Nov 20, 2022 10:30 AM (SUNDAY)

Solar PV is a fast-growing industry in India. India ranks fourth globally in Solar PV generation during 2021. IEC published several standards on safety of SOLAR PV, most of which are adopted as Indian Standards. These standards can be purchased from Bureau of Indian Standards - e-Sale (

The general protective measures used in AC system may/will not work in DC. The measure "fault protection by protective equipotential bonding and Automatic disconnection of supply" is impractical in DC side of PV installation. Hence the adopted shock protective measure is Double Insulation or Extra Low Voltage. Practically for DC voltage above 120 V, double insulation is the only recommended safety measure against shock.

Equipment such as PV modules, junction boxes or cabinets, cables used on the DC side (up to the DC terminals of the PV inverter) shall be class II or equivalent insulation as a measure to achieve shock protection.

Protection against fire due to arc require special attention at DC side, not only due to the difficulties in extinguishing the DC arc, but the availability of disconnection devices as well.

Double insulation is recommended against parallel arcs as well. Compromise of this safety measure will be hazardous. For example, majority of fire accidents in SOLAR PV DC side are in combiner box, the main reason being parallel arc due to non-availability of double insulation, added to which the PV panel feeding energy to the DC arc.

It is important to make safe PV installations. This webinar explains about Earthing, Earth Fault protection and Lightning protection in SOLAR PV application. The webinar also explains the recommendations in the latest IEC standards on SOLAR PV installations and is based on.

  • IEC 62548: Photovoltaic (PV) arrays – Design requirements

  • IEC 63112: Photovoltaic (PV) arrays – Earth fault protection equipment – Safety and safety related functionality

  • IEC 60364-7-712: Low voltage electrical installations - Part 7-712: Requirements for special installations or locations - Solar photovoltaic (PV) power supply systems

  • IEC 62109-1: Safety of power converters for use in photovoltaic power systems

  • IEC 62446-1: Grid Connected Systems — Documentation, Commissioning Tests and Inspection & Maintenance of PV systems

  • IEC TR 63227: Lightning and surge voltage protection for photovoltaic (PV) power supply systems

The program had more than 300 participations from various industries.

Part 1 - Introduction

Part 2 - Main Technical Presentation

Part - 3: Question and Answers

674 views2 comments


Jay Gupta
Jay Gupta
Nov 25, 2022
It is just like a dream come true experience to attend the much sought after webinar on Safety in Solar PV Installations, as it is highly imperative and need of the hour to unfold the mystery of unprofessional approaches and lack of adequate know-how about subject issues; as the Mission of the Hon'ble Prime Minister and Govt. of India to attain zero carbon emissions by year 2070 and nearly 20,000 GW Power generations by 2048; through unconventional/non fossils fuel; new and renewal energy resources may only be realized in true sense and consistently only with such professional acumen and know how.
I am dealing with large Solar PV installations- Operational and fire safety challenges for past 07 years consistently and…

Jay Gupta
Jay Gupta
Nov 22, 2022

The subject Webinar proved highly enriching towards professional competence and rarely addressed domain in terms of Solar PV Installation Protection and its fire Safety.

My best wishes to Mr. Gopa Kumar and Mr. KP Dominic for presenting another illustrious webinar.

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