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 />
Sr. Characteristics of Transformer Requirement<br />
Method of test<br />
No.<br />
Oil<br />
13 Ageing Characteristics after 96<br />
Hrs accelerated ageing (Open<br />
ASTM-/D<br />
1934/IS: 12177<br />
beaker method with copper<br />
catalyst)<br />
a) Specific Resistance<br />
(Resistivity)<br />
1) @ 27 0 C<br />
2) @ 90 0 C<br />
b) Dielectric Dissipati<strong>on</strong> Factor<br />
2.5 X 10 12 Ohm-cm-Min.<br />
0.2 X 10 12 Ohm-cm min.<br />
0.2 Max.<br />
(Tan delta) @ 90 0 C<br />
c) Total acidity<br />
d) Total sludge value<br />
0.05 mg. KOH/gm Max.<br />
0.05 % by weight Max.<br />
14 Presence of Oxidati<strong>on</strong> inhibiti<strong>on</strong> Absent IS: 335<br />
Appendix: D<br />
15 Water c<strong>on</strong>tent PPM (Max)<br />
New untreated oil<br />
After treatment<br />
50 PPM Max.<br />
05 PPM Max.<br />
IS: 2362<br />
IS: 18<str<strong>on</strong>g>66</str<strong>on</strong>g><br />
16 Poly Chlorinated Biphenyls NIL IEC 61619<br />
(PCB) C<strong>on</strong>tent<br />
Doble spec<br />
17 Gassing tendency at 50 hZ, after<br />
120 minutes<br />
5 mm 3 per minute (Max.) Doble spec<br />
SEAL OF COMPANY<br />
DATE:<br />
SIGNATURE OF BIDDER<br />
Sign and Seal of Bidder Page 63 of 87
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