220-66-kv-xmer-on-line-nifes-r4-sept-08 - Gujarat Electricity Board
220-66-kv-xmer-on-line-nifes-r4-sept-08 - Gujarat Electricity Board
220-66-kv-xmer-on-line-nifes-r4-sept-08 - Gujarat Electricity Board
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GETCO/E/TS – XMER01power/R4 Sept <strong>08</strong><br />
2.5.2 Any change in the parameters of CT required at the time of detailed engineering will<br />
have to be incorporated without any extra cost.<br />
2.6 POWER SUPPLY FOR CONTROLS:<br />
2.6.1 The AC power supply for auxiliaries will be available at 240 volts, 1 phase and<br />
415V. 3 phase, 50 Hz. The frequency can vary between ± 3% of normal frequency<br />
of 50 Hz and voltage can very from 85% to 110% of the normal value.<br />
2.6.2 The D.C. supply at either <str<strong>on</strong>g>220</str<strong>on</strong>g> V or 110 Volts will be available from stati<strong>on</strong> battery.<br />
The D.C. supply is subject to variati<strong>on</strong> of ± 10%.<br />
2.7 OIL STORAGE TANK:<br />
2.7.1 General<br />
This specificati<strong>on</strong> covers supply of oil storage tank of 15 cubic meter capacity al<strong>on</strong>g<br />
with complete accessories.<br />
2.7.2 Standard<br />
The oil storage tank shall be designed and fabricated as per relevant Indian<br />
Standards e.g. IS: 803 or other internati<strong>on</strong>ally acceptable standards.<br />
2.7.3 Specificati<strong>on</strong>s<br />
Transformer oil storage tanks shall be tow able & rested <strong>on</strong> pneumatic types of<br />
adequate quality & size. The tank shall be to cylindrical shape & mounted<br />
horiz<strong>on</strong>tally and made of mild steel plate of adequate thickness. Size of the storage<br />
tank shall be follows:<br />
Diameter<br />
: 2.5 meter<br />
Capacity<br />
: 15 cubic meters<br />
The tank shall be designed for storage of oil at a temperature of 100ºC.<br />
2.7.3.1 The Bidder may further note that maximum height of any part of the complete<br />
assembly of the storage tank shall not exceed 4.0 meters above road top.<br />
2.7.3.2 The tank shall have adequate number of jacking pad so that it can be kept <strong>on</strong> jack<br />
while completely filled with oil. The tank shall be provided with suitable saddles so<br />
that tank can be rested <strong>on</strong> ground after removing the pneumatic tyres.<br />
2.7.3.3 The tank shall be also fitted with manhole, outside & inside access ladder, silica gel<br />
breather assembly, inlet & outlet valve, oil sampling valve with suitable adopter, oil<br />
drainage valve, air vent etc. Pulling hook <strong>on</strong> both ends of the tank shall be provided<br />
so that the tank can be pulled from either end while completely filled with oil. Bidder<br />
Sign and Seal of Bidder Page 43 of 87
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