tender for supply installation testing and commissioning of ese type 03 lighting arrestors , supply installation testing and commissioning of ese type 03 lighting arrestors , plate earthing as per is:3043 with copper earth plate of purity 95% of size 600mm x 600mm x 3.0mm by embodying 3 mtr. below the ground level with 20 mm dia. g.i. ‘b class watering pipe ,including all accessories like nut, bolts, reducer, nipple, wire meshed funnel, heavy duty weather proof poly-propylene earth inspection chamber as per requirement of is/iec 62305 and tested as per iec 62561-5 with lockable jam free lid suitable for safe working load 60 kn of round / square size 250 mm, and height 250 to 300 mm. and embodying the pipe complete with alternate layers salt and coke/ charcoal, testing of earth resistance for value of 5 ohms or less as required. , supply & laying following size b ‘ class , g.i. pipe confirming to is : 1239 p - 1 ( 2004 ) with accessories like bend, socket etc. for laying earth conductor/ strip / cable in ground/ surface/ recess as required. (earth excavation will be paid extra) 25 mm dia. , lightning surge counter designed to record and display lightning strike events. the counter shall feature a 3 digit lcd screen (0-999 events) for clear event tracking and operate on a battery powered system. , supply, installation, and testing of an early streamer emission (ese) air terminal, designed and tested in accordance with nfc 17-102 standards, with delta t ( initiation advance ) time tested and certified by an ilac-accredited high-voltage test laboratory. the air terminal shall be constructed from corrosion-resistant materials to ensure durability and long-term performance. it shall be installed at the highest point of the structure and mounted on a mast of minimum 5.5 meters or as determined by the initiation advance time (δt) calculations, ensuring the required protection radius. the protection radius shall be determined as per nfc 17-102, based on the level of risk protection required (levels i to iv), with proper earthings integration for effective lightning dissipation. es-60 triggering advance time (δt) -60μs, protection radius (meters) as per highest risk 79 mtr. , supply, fabrication, and installation of a galvanized iron (gi) pipe support structure ( lightning mast ) with a 350 mm × 350 mm base plate and 10 mm thickness for secure mounting. the mast shall support the ese air terminal and include provisions for a guy wire clamping system to ensure stability. it shall provide a secure arrangement for fixing the air terminal and have appropriate termination point / arrangement for connection to the down conductor. total mast height : 8-10 meter , supply and installation of an 8 mm aluminum down conductor, designed for efficient dissipation of lightning currents. the conductor shall be securely fixed using corrosion-resistant clamps at appropriate intervals, ensuring a continuous, low-resistance path from the air terminal to the earthing system. the conductor length shall be determined based on actual site conditions, with all necessary accessories, including clamps, connectors, and fasteners. , specifiacation as per tender details ( technical specation sheet page no 23 to 25)