Northern Railway Tender

Supply of SPD Life tester, designed for on-site testing of surge protective device (SPD) 4 as per IEC-61643. It allows checking and indicating the health status of GDT/MOV based SPD of voltage range up to 1000V. It shall indicate the status of SPD by measuring its electrical parameter. Make- JMV or reputed make. Inspection by RITES.

Supply of 25x2 mm Copper tape for interconnection of earth electrodes as per RDSO Drg. No. Drg. No. SDO/RDSO/E&B/001 of specification No. RDSO/SPN/197 Ver.1.0 or latest. Inspection by RITES.

Supply and testing of Relay DOC (Automated BR930 Relay tester & Conditioner). (Inspection: Consignee)

Supply and installation of indicative type Surge Protection Device as per RDSO Spec. No. Specification no: RDSO/SPN/165/2023 VERSION 4.0 with Amendment 1 or latest (Lightening and Transient surge protection for power line). The system shall have stage 1 (class B) and stage 2 (class 1 C) type against Lightning electromagnetic Impulse configuration. The protection of Type 1 and 2 against Lightning electromagnetic Impulse (LEMP) and other high surge, shall be provided at the incoming of the power line at the stations, LC gates before the power equipments as per the instructions of Engineer in-charge at site. Supply of surge protection with Potential free contacts shall be of approved make like OBO/DEHN/PHOENIX/LPT/JMV/CITEL or better make. All other miscellaneous materials required for the work shall be supplied by the contractor. (Material Inspection by RITES).

supply, installation and commissioning of maintenance free separate earthing kit as per RDSO spcn. no. RDSO/SPN/197 Ver. 1.0 or latest. Basic earthing kit-1 set consisting of [a]The earth electrode shall be UL listed and of minimum 17.0mm diameter and minimum 3 Meter long and 2 minimum copper bonding thickness shall be of 250 microns of 99.9% electrolyte grade copper.-01 nos. [b] earth enhancing compound RDSO approved in sealed bags of 10 kgs each-03 nos. minimum [c]SEEB 150mmx25mmx6mm-01 No. [d]MEEB 300mmx25mmx6mm-01 no. [e] 35 sq. mm. copper cable to connect earth electrode to MEEB-15 mtrs approx. and all other materials and cables required for installation as per abovementioned RDSO Specification. Work to be carried out in supervision of Site engineer. (Material Inspection: RITES)

Supply and installation of earth electrodes pipe of 3 mtrs length and 50 mm dia. pointed on lower end by tapering for a length of 150 mm and connecting with lightening arrester or signaling gears as per std. Practice. The item includes digging of pit in earth, 3 Mtrs. Deep and fixing earth electrode pipe in it. Earth pipe shall be buried in the ground to the length of 2.7 mtrs. after welding 6 SWG wire at lower end and fixing through nut and bolt at top. Casting of cement of Cement 3 concrete enclosures as per drg. No. NR/S&T/CON/6.4/97. The soil treatment shall be done as per std. practice. The item includes provision of earth lead wires/mild steel flat and soldering of lead wires. The other end of the earth wire/mild steel flat to be connected to block instrument mild steel flat, cable sheath of power equipment, apparatus case, relay racks, other equipments as per the instruction of Engr. at site & IRSEM. Complete materials such as earth electrodes as per drg. No. NR/S&T/CON/6.3/97, cement, wiring material, soldering material, mild steel flat, earth lead wires 6 SWG and soldering of lead wires etc. to be supplied by the contractor. (Material inspection: RITES)

Supply & Installation of Earth Leakage detector (Eight Channels) conforming to RDSO spn. No. RDSO/SPN/256/2002 or latest for monitoring different AC & DC supplies including all accessories as per specifications and stipulations of tender document. (Inspection: RDSO)