Transformer Oil IS 335-1993

TRANSFORMER OIL > IS : 335-1993 We offer Transformer Oil manufactured from imported Base Stocks and possessing following advantageous features to make it suitable for use as an electrical insulating & good heat transfer medium and quenching medium for power and distribution electrical apparatus such as Power Transformers, Capacitors, Switch Gears, Circuit Breakers and allied equipments.


Transformer Oil IS 335-1993

Sr.No

CHARACTERISTIC

SPECIFICATION

1

Appearance

Clear and Transparent and free from suspended matter

2

Density @ 29.6°c max. g/cm

0.89

3

Kinematic viscosity @ 27°c max.cst

27

4

Interfacial Tension @ 27°c min., n/m

0.04

5

Flash Point (PMCC) °c min.

140°C

6

Pour Point °c max.

-6°C

7

Neutralisation Value
(a) Total acidity max. mg KOH/gm
(b) Inorganic Acidity/ Alkalinity


0.03
Nil

8

Corrosive Sulphur

Non-corrosive

9

Electric Strength (Breakdown voltage)
(a) New Unifiltered Oil min.
(b) After Filtration min.


30 kv
60 kv

10

Dielectric Dissipation Factor
(Tan delta) @ 90°c max.

0.002

11

Specific Resistance (Resistivity)
A) At 90°C Min
B) At 27°C Min


: 35 x 1010 ohm – cm
: 1500 x 1012 ohm - cm

12 

Oxidation Stability
a) Neutralisation Value after Oxidation Max.
b) Total Sludge after oxidation Max.


0.40 gm KOH / gm

0.10 percent by weight

13 

Specific Resistance (Resistivity)
a) At 20°C Min
b) At 90°C Min.


2.0 x 1012 ohm - cms
0.2 x 1012ohm - cms

14 

Dielectric Dissipation Factor
(Tan delta) At 90°C Max.


0.002

15 

Total Acidity Max.

0.05 mg of KOH / gm

16 

Total Sludge Value Max.

0.05%

17 

Presence of Oxidation Inhibitor

The oil shall not contain antioxidant additives

18 

Water Content max.

50 ppm

19 

S.K.Value

Under consideration