Salient Technical Features of the equipment / systems / services covered in the

IFB No. 40079824 are mentioned below. These Salient Technical features are

mentioned only to facilitate the prospective bidders to prima-facie understand the

requirements under the tender and shall not in any way limit or alter the scope of

work and technical features / specification of equipment / system / services

covered in the bidding documents. Detailed provisions in regard of scope of work

and technical features / specification of equipment / system / services covered in

the bidding documents shall be final and binding:

The switchyards at Vindhyachal STPS envisaged under Renovation of 400/132kV

Switchyard are of 400 & 132 kV level, with 400 kV system employing “DMT Bus scheme”

and 132 kV system employing “Double Bus scheme”.

SYSTEM PARAMETERS

The system parameters shall be as under:

400 kV 132 kV

a) Highest system voltage : 420 kV rms 145kV rms

b) Lightning Impulse voltage : 1425kVp  650kVp

c) Switching impulse voltage : 1050kVp -----

d) Power frequency withstand : 630 kV(rms) 275 kV(rms)

for 1 min. (rms)

e) Max. fault level (1 sec.) : 50 kA 31.5kA

f) Minimum creepage distance : 10500 mm 3625mm