Specifications

Enquiry Specification for Wagon Tippler with Side Arm Charger and Associated works
NRO/CON/WT/533
EPI – New Delhi Volume-2B, Rev.0 Page 28 of 63
13. Tentative Equipment layout in electrical premises with tentative
dimensions of all panels.
14. List and capacity of emergency loads and their feeding arrangement.
15. Automation system configuration with list and details of hardware.
Details about numbers & locations of RI/O panels & count of Inputs &
outputs of various types considered. I/O count of each type should
distinctly specify the I/O count + spare I/O count + chassis capacity of
additional I/O.
16. Details & Scheme of Illumination system and Emergency lighting.
17. Details & BOM of Electrics related to Yard Machines, Wagon Tippler &
Side Arm Charger, Ventilation and Air conditioning system etc.
18. List of commissioning spares.
19. List of spares for 2 years normal operation.
20. List of insurance spares.
21. List of special tools, tackles, instruments and calibration equipment &
devices.
22. List of deviations, if any, from Technical Specification & G.T.S.
23. List of exclusions.
24. Duly filled in questionnaire.
25. Reference list of similar jobs.
26. Time bar chart indicating various activities starting from date of
placement of order till commissioning.
27. Any other details which may be felt necessary.
(b) Basic Engineering drawings (Electrical)
1. List of drawings (Basic Engg /Detailed Engg/ Reference) and drawing
numbering system along with schedule of submission.
2. Single line diagrams of MCCs /Control Panels, PDBs, MLDBs, LDBs,
SLDBs, Main fire detection and alarm panel etc. with rating of
components, cable sizes and details of protection and metering etc.
3. HT & LT Motor and component list including field mounted electrics
4. HT and LT Motor data sheets as per enclosed format.
5. Type-II Co-ordination chart as per IS: 13947-1993 for MPCB/ MCCB,
Contactor and Overload relay.
6. Schematic drawing of different feeders, control, alarm, indications,
interlocking and other schematics.
7. Shop/Unit wise Maximum Demand calculations.
8. Relay settings with calculations for total network to ensure proper co-
ordination.
9. Busbars sizing calculation with respect to temperature rise & short
circuit withstand capacity.
10. Design Calculations for selection of main equipment such as
transformers drive motors, AC drives, bus bars, cables, batteries etc.
11. Typical schemes of DOL, RDOL feeders indicating inputs & outputs
applicable to the various feeders indicated in SLDs.
12. Power and regulation schemes of AC drives.
13. Calculation for temperature rise of busbars.
14. Layout of substations, electrical rooms and control rooms including
ventilation and air-conditioning rooms, handling facilities. The layout
drawings indicating cable trench, wall openings, conduit inserts, plate
inserts, Minimum clearances from electrical panels for installation of
panels, cable trays, conduits for concealed wiring etc.