PRODUCTS
 
 
bigicon Transformer Oils
 
SR NO. PROPERTIES TEST METHOD IS : 335 TEST RESULTS
      MAX MIN  
1 Appearance A representative sample of the oil shall be examined in a 100mm thick layer at 27°C The oil shall be clear,
transparant & free from
suspended matter /
sediments.
Clear, transparant &
free from suspended
matter sediments
2 Density @ 29.5°C g/cc IS : 1448 (P : 16)- 1990   0.89 0.813
3 Kinematic Viscosity @ 27°C cst IS : 1448 (P : 25)- 1976   27.0 11.82
4 Interfacial tension @ 27°C
N / M
IS : 6104 - 1971 0.04   0.048
5 Flash Point, P.M.C.C, °C IS : 1448 (P : 21)- 1992 140   150
6 Pour Point, ° C IS : 1448 (P : 10)- 1970   -6 -33
7 Neutralisation Value IS : 1448 (P : 2)- 1967      
[a] Total acidity, mg KOH/g     0.03 0.001
[b] Inorganic accidity/alkalinity   NIL NIL
8 Corrosive sulphur Annexture - B Non - Corrosive Non - Corrosive
9 Electric strength (BDV) IS :6792 - 1992      
[a] New unfiltered oil, KV (rms)   30   76
[b] After filteration, KV (rms)   60   -
10 Di - electric dissipation factor (tan delta) @ 90°C IS : 6262 - 1971   0.002 0.00048
11 Specific resistance, ohm
- cm
IS : 6103 - 1971      
[a] At 90° C   35 x 10 ¹² 627 x 10 ¹²
[b] At 27° C   1500 x 10 ¹² 6310 x 10 ¹²
12 Oxidation stability Annex C      
[1] Neutralisation Value, after
oxidation, mg KOH/g
    0.40 0.14
[2] Total sludge after oxidation, % by Wt     0.10 0.003
13 Ageing charactericstics after
accelerated Ageing (open beaker method with copper catalyst)
IS : 12177 - 1987      
[a] Specific resistance, ohm-cm IS : 6103 - 1971      
(1) At 27° C   2.5 x 10 ¹² 176 x 10 ¹²
(2) At 90° C   0.20 x 10 ¹² 56 x 10 ¹²
[b] Di - electric dissipation factor
( tan delta ) @ 90° C
IS : 6262 - 1971   0.20 0.0012
[c] Total acidity, mg KOH/g IS : 1448 (P : 2)- 1967   0.05 0.011
[d] Total sludge Value, % by Wt Annex A of IS : 12177   0.05 0.002
14 Presence of oxidation inhibitor IS : 13631 - 1993 The oil shall not contain
antioxidant additive
Absent
15 Water content, ppm IS : 13567 - 1992   50 12