Substation roof earth flat connections bond metallic roof components to the main earthing grid for lightning protection and equipotential bonding.

Purpose

• •Safely channels lightning strikes to ground
• •Prevents voltage differences between roof structures
• •Protects personnel during maintenance
• •Ensures system integrity

Installation

• •GI or copper flats (25x3mm to 50x6mm)
• •Bonded to roof steel and lightning arresters
• •Connected via vertical down conductors
• •Bolted lugs or exothermic welding

Testing

• •Continuity and earth resistance checks
• •Regular visual inspections
• •Post-storm verification