Notes transformer oil

Source
Apar, Panama, IPOL, Raj Petro website and Machinery Lubrication
A compilation by Hussam Adeni
hussam_adeni@yahoo.com Lubricant Specialist & Tribologist
Notes and knowledgebase
Transformer Oils
Notes on Transformer Oil
PDS/TDS Transformer Oils
 Apar, Panama, IPOL, Raj Petro
Keys for Testing Transformer Oil
Hussam Adeni – Compilation

Transformer Insulating Oil and
Types of Transformer Oil
Sourced from:
https://www.electrical4u.com/transformer-insulating-oil-and-types-of-transformer-oil/
Next »
Introduction of Insulating Oil
Insulating oil in an electrical power transformer is commonly known as
transformer oil. It is normally obtained by fractional distillation and
subsequent treatment of crude petroleum. That is why this oil is also
known as mineral insulating oil. Transformer oil serves mainly two
purposes one it is liquid insulation in electrical power transformer and two
it dissipates heat of the transformer e.i. acts as coolant. In addition to
these, this oil serves other two purposes, it helps to preserve the core
and winding as these are fully immersed inside oil and another important
purpose of this oil is, it prevents direct contact of atmospheric oxygen
with cellulose made paper insulation of windings, which is susceptible to
oxidation.
Types of Transformer Oil
Generally there are two types of transformer Oil used in transformer,
1. Paraffin based transformer oil
2. Naphtha based transformer oil
Naphtha oil is more easily oxidized than Paraffin oil. But oxidation product
i.e. sludge in the naphtha oil is more soluble than Paraffin oil. Thus sludge
of naphtha based oil is not precipitated in bottom of the transformer.
Hence it does not obstruct convection circulation of the oil, means it does
not disturb the transformer cooling system. But in the case of Paraffin oil
although oxidation rate is lower than that of Naphtha oil but the oxidation
product or sludge is insoluble and precipitated at bottom of the tank and
obstruct the transformer cooling system. Although Paraffin based oil has
above mentioned disadvantage but still in our country it is generally used
because of its easy availability. Another problem with paraffin based oil is
its high pour point due to the wax content, but this does not effect its use
due to warm climate condition of India.
Properties of Transformer Insulating Oil
Some specific parameters of insulating oil should be considered to
determined the serviceability of that oil.
Parameters of Transformer Oil
The parameters of transformer oil are categorized as,
1. Electrical parameters :– Dielectric strength, specific resistance, dielectric
dissipation factor.
2. Chemical parameter :- Water content, acidity, sludge content.

3. Physical parameters :- Inter facial tension, viscosity, flash point, pour
point.
Electrical Parameter of Transformer Oil
Dielectric Strength of Transformer Oil
Dielectric strength of transformer oil is also known as breakdown
voltage of transformer oil or BDV of transformer oil. Break down
voltage is measured by observing at what voltage, sparking strants
between two electrods immerged in the oil, separated by specific gap. low
value of BDV indicates presence of moisture content and conducting
substances in the oil. For measuring BDV of transformer oil, portable
BDV measuring kit is generally available at site. In this kit, oil is kept in a
pot in which one pair of electrodes are fixed with a gap of 2.5 mm (in
some kit it 4mm) between them.
Now slowly rising voltage is applied between the electrodes. Rate of rise of
voltage is generally controlled at 2 KV/s and observe the voltage at which
sparking starts between the electrodes.
That means at which voltage dielectric strength of transformer oil
between the electrodes has been broken down.

Generally this measurement is taken 3 to 6 times in same sample of oil
and the average value of these reading is taken. BDV is important and
popular test of transformer oil, as it is primary indication of health of oil
and it can be easily carried out at site.
Dry and clean oil gives BDV results, better than the oil with moisture
content and other conducting impurities. Minimum breakdown voltage
of transformer oil or dielectric strength of transformer oil at which
this oil can safely be used in transformer, is considered as 30 KV.
Specific Resistance of Transformer Oil
This is another important property of transformer oil. This is measure of
DC resistance between two opposite sides of one cm3
block of oil. Its unit is
taken as ohm-cm at specific temperature. With increase in temperature
the resistivity of oil decreases rapidly. Just after charging a transformer
after long shut down, the temperature of the oil will be at ambient
temperature and during full load the temperature will be very high and
may go up to 90o
C at over load condition. So resistivity of the insulating
oil must be high at room temperature and also it should have good value
at high temperature as well. That is why specific resistance or resistivity
of transformer oil should be measured at 27o
C as well as 90o
C.
Minimum standard specific resistance of transformer oil at 90o
C is 35 ×
1012
ohm–cm and at 27o
C it is 1500 × 1012
ohm–cm.
Dielectric Dissipation Factor of Tan Delta of Transformer Oil
Dielectric dissipation factor is also known as loss factor or tan delta of
transformer oil. When a insulating materials is placed between live part
and grounded part of an electrical equipment, leakage current will flow. As
insulating material is dielectric in nature the current through the
insulation ideally leads the voltage by 90o
. Here voltage means the
instantaneous voltage between live part and ground of the equipment.
But in reality no insulating materials are perfect dielectric in nature.
Hence current through the insulator will lead the voltage with an angle little
bit shorter than 90o
. Tangent of the angle by which it is short of 90o
is
called dielectric dissipation factor or simply tan delta of transformer
oil.
More clearly, the leakage current through an insulation does have two
component one is capacitive or reactive and other one is resistive or
active.
Again it is clear from above diagram, value of ′δ′ which is also known as

Loss angle is smaller, means resistive component of the current IR is
smaller which indicates high resistive property of the insulating material.
High resistive insulation is good insulator. Hence it is desirable to have
loss angle as small as possible. So we should try to keep the value of tanδ
as small as possible. High value of this tanδ is an indication of presence of
contaminants in transformer oil.
Hence there is a clear relationship between tanδ and resistivity of
insulating oil. If resistivity of the insulating oil is decreased, the value of
tan-delta increases and vice verse. So both resistivity test and tan delta
test of transformer oil are not normally required for same piece of
insulator or insulating oil.
In one sentence it can be said that, tanδ is measure of imperfection of
dielectric nature of insulation materials like oil.
Chemical Parameters of Transformer Oil
Water Content in Transformer Oil
Moisture or water content in transformer oil is highly undesirable as it
affects adversely the dielectric properties of oil. The water content in oil
also affects the paper insulation of the core and winding of transformer.
Paper is highly hygroscopic in nature. Paper absorbs maximum amount of
water from oil which affects paper insulation property as well as reduced
its life. But in loaded transformer, oil becomes hotter, hence the solubility
of water in oil increases as a result the paper releases water and increase
the water content in transformer oil. Thus the temperature of the oil
at the time of taking sample for test is very important. During oxidation
acid are formed in the oil the acids give rise the solubility of water in the
oil. Acid coupled with water further decompose the oil forming more acid
and water. This rate of degradation of oil increases. The water content in
oil is measured as pm (parts per million unit).
Water content in oil is allowed up to 50 ppm as recommended by IS–
335(1993). The accurate measurement of water content at such low
levels requires very sophisticated instrument like Coulometric Karl Fisher
Titrator .

Acidity of Transformer Oil
Acidity of transformer oil, is harmful property. If oil becomes acidic, water
content in the oil becomes more soluble to the the oil. Acidity of oil
deteriorates the insulation property of paper insulation of winding. Acidity
accelerates thee oxidation process in the oil. Acid also includes rusting of iron
in presence of moisture. The acidity of transformer oil is measure of its
acidic constituents of contaminants. Acidity of oil is express in mg of KOH
required to neutralize the acid present in a gram of oil. This is also known as
neutralization number.
Physical Parameters of Transformer Oil
Inter Facial Tension of Transformer Oil
Inter facial tension between the water and oil interface is the way to measure
molecular attractive force between water and oil. It is measured in Dyne/cm
or mili-Newton/meter. Inter facial tension is exactly useful for determining
the presence of polar contaminants and oil decay products. Good new oil
generally exhibits high inter facial tension. oil oxidation contaminants lower
the IFT.
Flash Point of Transformer Oil
Flash point of transformer oil is the temperature at which oil gives
enough vapors to produce a flammable mixture with air. This mixture gives
momentary flash on application of flame under standard condition. Flash
point is important because it specifies the chances of fire hazard in the
transformer. So it is desirable to have very high flash point of transformer
oil. In general it is more than 140o
(>10o
).
Pour Point of Transformer Oil
It is the minimum temperature at which oil just start to flow under standard
test condition. Pour point of transformer oil is an important property mainly
at the places where climate is extremely cold. If the oil temperature falls
bellow the pour point, transformer oil stops convection flowing and obstruct
cooling in transformer. Paraffin based oil has higher value of pour point,
compared to Naphtha based oil, but in India like country, it does not effect
the use of Paraffin oil due tits warm climate condition. Pour Point of
transformer oil mainly depends upon wax content in the oil. As Paraffin based
oil has more wax content, it has higher pour point.
Viscosity of Transformer Oil
In few wards, viscosity of transformer oil can be said that viscosity is the
resistance of flow, at normal condition. Obviously resistance to flow of
transformer oil means obstruction of convection circulation of oil inside the
transformer. A good oil should have low viscosity so that it offers less
resistance to the convectional flow of oil thereby not affecting the cooling of
transformer. Low viscosity of transformer oil is essential, but it is equally
important that, the viscosity of oil should increase as less as possible with
decrease in temperature. Every liquid becomes more viscous if
temperature decreases.

DGA or Dissolved Gas Analysis of Transformer Oil | Furfural or
Furfuraldehyde Analysis
« Previous
DGA or Dissolved Gas Analysis of Transformer Oil
Whenever electrical power transformer goes under abnormal thermal and
electrical stresses, certain gases are produced due to decomposition
of transformer insulating oil, when the fault is major, the production of
decomposed gases are more and they get collected in Buchholz relay. But
when abnormal thermal and electrical stresses are not significantly high
the gasses due to decomposition of transformer insulating oil will get
enough time to dissolve in the oil. Hence by only monitoring the Buchholz
relay it is not possible to predict the condition of the total internal
healthiness of electrical power transformer. That is why it becomes
necessary to analyse the quantity of different gasses dissolved in
transformer oil in service. From dissolved gas analysis of
transformer Oil or DGA of transformer oil, one can predict the
actual condition of internal health of a transformer.
It is preferable to conduct the DGA test of transformer oil in routine
manner to get prior information about the trend of deterioration of
transformer health and life. Actually in dissolved gas analysis of
transformer oil or DGA of transformer oil test, the gases in oil are
extracted from oil and analyze the quantity of gasses in a specific amount
of oil. By observing percentages of different gasses present in the oil, one
can predict the internal condition of transformer.
Generally the gasses found in the oil in service are hydrogen (H2),
methane (CH4), Ethane (C2H6), ethylene (C2H4), acetylene (C2H3), carbon
monoxide (CO), carbon dioxide (CO2), nitrogen (N2) and oxygen(O2).
Most commonly used method of determining the content of these gases in
oil, is using a Vacuum Gas Extraction Apparatus and Gas Chronographs.
By this apparatus first gasses are extracted from oil by stirring it under
vacuum. These extracted gasses are then introduced in gas Chronographs
for measurement of each component.
Generally it is found that hydrogen and methane are produced in large
quantity if internal temperature of power transformer rises up to 150o
C to
300o
C due to abnormal thermal stresses. If temperature goes above
300o
C, ethylene (C2H4) are produced in large quantity. At the temperature
is higher than 700o
C large amount of hydrogen(H2) and ethylene(C2H4)
are produced.
Ethylene(C2H4) is indication of very high temperature hot spot
inside electrical transformer. If during DGA test of transformer oil, CO
and CO2 are found in large quantity it is predicted that there is
decomposition of proper insulation.

Furfural Test or Furfuraldehyde Analysis of Transformer Oil
Transformer core and winding have mainly paper insulation. Base of
paper is cellulose. The Cellulose has a structure of long chain of
molecules. As the paper becomes aged, these long chains are broken into
number of shorter parts. This phenomenon we often observe in our home.
The pages of very old books become very much brittle. In transformer,
the aging affect of paper insulation is accelerated due to oxidation occurs
in oil. When insulating paper becomes mechanically weak, it can not
withstand the mechanical stresses applied during electrical short circuit
and leads to electrical breakdown.
It is therefore necessary to monitor the condition of paper insulation
inside a power transformer.
It is not possible to bring out a piece of paper insulation from a
transformer in service for testing purpose. But we are lucky enough, that
there is a testing technique developed, where we can examine the
condition of paper insulation without touching it. The method is
called Furfuradehyde analysis of in short Furfural test.
Although by dissolved gas analysis one can predict the condition of the
paper insulation primarily, but it is not very sensitive method. There is a
guide line in IEC-599, where it is told that if the ratio of CO2 and CO in
DGA results is more than 11, it is predicted that the condition of paper
insulation inside the transformer is not good. A healthy cellulose
insulation gives that ratio in a range of 4 to 11. But still it is not a very
sensitive way of monitoring the condition of paper insulation. Because
CO2 and CO gases also produced during oil breakdown and sometimes the
ratio may misleads the prediction.
When oil is soaked into paper, it is damaged by heat and some unique oil
soluble compounds are realized and dissolved in the oil along with
CO2 and CO. These compounds belong to the Furfuraldehyde group.
These are some times called Furfural in short. Among all Furfurals
compounds 2- Furfural is the most predominant. These Furfural family
compound can only be released from destructive heating of cellulose or
paper. Furfuraldehyde analysis is very sensitive as because damage of
few grams of paper is noticeable in the oil even of a very large size
transformer. It is a very significant diagnostic test. It is best test for
assessing life of transformer. The rate of rise of percentage of Furfurals
products in oil, with respect to time, is used for assessing the condition
and remaining life of paper insulation in power transformer.

6/15/2017 Transformer Oil | Distribution Transformer |Poweroil | Apar.com
http://www.apar.com/transformeroils.php 1/2
(INDEX.PHP)
 (HTTPS://WWW.FACEBOOK.COM/APARINDUSTRIESLTD)
 (HTTPS://WWW.YOUTUBE.COM/CHANNEL/UC-WJ9WTH66ERMICHCDFYR3A)
 (HTTPS://PLUS.GOOGLE.COM/117790020745184081058/)
PRODUCTS
PRODUCTS (PRODUCTS.PHP) / SPECIALITY OILS & LUBRICANTS (SPECIALITY-OILS-LUBRICANTS.PHP) / TRANSFORMER OILS
TRANSFORMER OILS
APAR pioneered the manufacture of internationally benchmarked grades of high performance Transformer Oils in India that were more environment
friendly and of high performance with higher oxidation stability, lower gassing tendency and non corrosive with ultra low levels of sulphur.
Apar produces a comprehensive range of high quality Transformer oils from selected severely hydro treated Naphthenic and Isodewaxed /
hydrocracked Isopara nic Oils free from polar compounds and have very high oxidation stability and ageing properties guaranteeing long service life.
The low sulphur wax free naphthenic oils with low Viscosity Index ensure excellent cooling characteristics, high solvency and low corrosivity and the
highly re ned ultra low sulphur para nic oils ensure excellent non corrosive properties. These optimum re ned Transformer Oils also possess very
good electrical and insulating properties, oxidation stability and controlled low or negative gassing tendency. Extensive efforts are taken to up grade
our oils to meet the latest more severe and stringent control requirements of non corrosive oils.
Apar offers Transformer oils tailor made to suite the exact requirements of different types of Transformers and the latest National / International
Standards like IEC 60296-2012, ASTM D 3487 - 2009 Type I & II , EN BS 60296 , BS 148 - 1998 Class I/ IA & II / IIA , DIN 57370 / VDE 7370, AS. 1767.1 -
1999 and Doble's TOPS, IS 335 - 1993 and IS 12463 - 1988. The product range also includes the earlier International Standards like the IEC 296 - 1982
Class I / IA & II / IIA and BS 148 - 1984 Class I/ IA & II / II A.
Being the largest manufacturer of Transformer Oils in India with approximately 50 % market share and also world's fourth largest manufacturer, Apar
is the dominant supplier in power transformer sector (132 kV to 800 k V - AC & HVDC ) meeting the special requirements of OEMs, Utilities and Power
Transmission & Distribution Companies.
Its client pro le comprises global power generation and transmission majors and OEMs like ABB, Alstom T & D ( erstwhile Areva T & D ) , BHEL, Bharat
Bijlee, Brush Transformers, Crompton Greaves, Chevron, Daihen Electric , Emco Transformers, Hundai Heavy Industries , Hyosung Corporation , IMP
Transformers, Power Grid Corporation of India Ltd, National Electricity Boards & Companies, NHPC, NPCIL, NTPC, Pauwels , SASO (Thailand & Japan),
SEC (Saudi Arabia), Siemens AG, Transformer and Recti ers, Schnieder Electric, Tata Power, Voltamp Transformer, Wilson Transformers (Australia),
Maiden (Singapore) and others.


6/15/2017 Transformer Oil | Distribution Transformer |Poweroil | Apar.com
http://www.apar.com/transformeroils.php 2/2
The products are also approved by the reputed international independent test laboratories like Doble (USA), Laborelec (Belgium), KEMA (Netherlands),
Powerlink (Australia) and major global OEM labs like ABB (Sweden), Areva (France / Belgium), Siemens (Germany), WEG Transformers (S.A) and
utilities like TEIAS (Turkey), PLN (Indonesia), TPC (Taiwan), TNB (Malaysia), PLC - Nigeria, Electricite Du Liban (Lebanon), MEW (Oman & Kuwait),
SABIC, SEC (Saudi Arabia), etc. When these widely dispersed customers need a trusted vendor, the one name on their shortlist is inevitably APAR.
Apar is a member of the Bureau of Indian Standards that prepares the National Standards for Transformer Oils, White Oils, Industrial &, Automotive
and Specialty Oils. Also, Apar is the rst Indian Company and the second in Asia with its technical representative on the Cigre Transformer Insulating
Fluids Technical Committee, which in uences the global standards used by OEMs and Utilities.
For export enquiries related to oil please write us to
oilexports@apar.com (mailto:oilexports@apar.com)
PRODUCT DATA SHEETS MISCIBILITY STATEMENT (PDF/SPECIALITY-OILS-LUBRICANTS/PROCESS-OILS/MISCIBILITYNEW.PDF)
POWEROIL PRODUCT RANGE
TRANSFORMER OILS
KNOW MORE (TRANSFORMER-OILS.PHP)
(TRANSFORMER-OILS.PHP)
WHITE OILS, LIQUID PARAFFINS & PETROLEUM JELLY
(WHITE-OILS.PHP)
KNOW MORE (WHITE-OILS.PHP)
PROCESS OILS
KNOW MORE (PROCESS-OILS.PHP)
(PROCESS-OILS.PHP)
INDUSTRIAL OILS
KNOW MORE (INDUSTRIAL-OILS.PHP)
(INDUSTRIAL-OILS.PHP)


Disclaimer: APAR makes no warrantees, representation or conditions of any kind expressed or implied for use with respect to these products. Final determination of suitability
of the products for the application contemplated by the user is solely their responsibility.
Product Data SheetApar Industries Ltd., Apar House, Corporate Park, Sion-Trombay Road, Chembur, Mumbai – 400 071.
Tel: 91-22-2526 3400 / 6780 0400 | Fax: 91-22-2524 6326 | website: www.apar.com
POWEROIL
Specialty Oils & Lubricants
POWEROIL TO 16
POWEROIL TO 16 is a specially formulated highly hydrotreated Uninhibited Transformer Oil of high flash point suitable
for Pad Mounted Transformers and similar electrical equipments of severe applications.
Sr No Characteristics Unit Test Method Guaranteed Data
Min Max
1 Appearance Simple visual examination
of the oil sample
Clear and free from
sediment and suspended
matter
2 Colour ASTM D 1500 4.0
3 Density at 15
o
C
at 29.5
o
C
kg / dm
3
IS 1448 P 16 - 1997 0.878
0.869
3 Kinematic Viscosity at 100
o
C
at 150
o
C
cSt IS 1448 P 25 - 1996 16
6
4 Flash Point, COC
o
C ASTM D 92 265
5 Fire Point ASTM D 92 300
6 Pour Point
o
C IS 1448 P10 - 1970 - 18
7 Inter Facial Tension N / m IS 6104 - 1971 0.033
8 Water Content ppm IS 13567 - 1992 50
9 Specific Resistance at 50
o
C ohm - cm IS 6103 - 1971 50 x 10
12
10 Breakdown Voltage IS 6792 - 1972
As delivered kV 30
11 Dielectric Dissipation Factor
(Tan δ ) at 25
o
C
at 100
o
C
IS 6262 - 1971
0.01
0.7
12 Corrosive Sulphur
Copper Strip, 140
o
C, 19 Hrs
IS 335 Annexure B Non-corrosive
13 Presence of Oxidation
Inhibitor
% IS 13631 - 1982 The oil shall not contain
antioxidant additive.
Value of 0.05 % max
shall be treated as
absence of DBPC
14 Oxidation Stability at
140
o
C, 24 Hrs , 250 psi
Sludge % 0.06
(Version # 4 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 10 BS
POWEROIL TO 10 BS is an Uninhibited Transformer Oil meeting BS 148 Class II : 1984 Standard Specification.
It also meets the ASTM D 1275 B Test requirement for Corrosive Sulphur.
Min Max
1 Appearance Representative sample of
the oil shall be examined in
transmitted light under an
oil depth of 100 mm at
ambient temperature
Clear free from sediment
and suspended matter
2 Density at 20
o
C kg / dm
3
BS 4714 0.895
o
C mm
2
/ sec BS 2000 Part 71 11
at - 30
o
C 1800
4 Flash Point, PMCC
o
C BS 2000 Part 34 130
5 Pour Point
o
C BS 2000 Part 15 - 45
6 Neutralization Value mg KOH/ gm BS 2000 Part 1 0.03
7 Water Content , Bulk / Drum ppm BS 6470 30 / 40
8 Breakdown Voltage BS 5874
As Delivered kV 30
(Tan δ )at 90
o
C & 40 to 62 Hz
BS 573 0.005
Copper Strip, 140
o
C, 19 Hrs
Copper Strip, 150
o
C, 48 Hrs
BS 5680 : 1979
ASTM D 1275 B
Non Corrosive
Non Corrosive
11 Antioxidant Additives % BS 5984 : 1980 Not Detectable
12 Oxidation Stability
at 120
o
C, 164 Hrs
BS 148 : 1984 Appendix A
Total Acidity mg KOH /gm 1.5
Sludge % 1.0
13 Gassing Tendency at 50 Hz
after 120 minutes
mm
3
/ min BS 5797 Method A + 5
(Version # 4 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 10
POWEROIL TO 10 is an Uninhibited Transformer Oil meeting IEC 296 Class II : 1982 Standard Specification.
Min Max
transmitted light under a
thickness of 10 cm at
ambient temperature
2 Density at 20
o
C kg / dm
3
ISO 3675 0.895
o
C mm
2
/ sec ISO 3104 11
at - 30
o
C 1800
4 Flash Point, PMCC
o
C ISO 2719 130
5 Pour Point
o
C ISO 3016 - 45
6 Inter Facial Tension at 25
o
C N / m ISO 6275 0.04
7 Neutralization Value mg KOH/ gm 7.7 of IEC 296 0.03
8 Water Content , Bulk / Drum ppm IEC 733 30 / 40
9 Breakdown Voltage IEC 156
As Delivered / After Treatment kV 30 / 50
(Tan δ )at 90
o
C & 40 to 60 Hz
IEC 247 0.005
Copper Strip, 140
o
C, 19 Hrs
Copper Strip , 150
o
C, 48 Hrs
ISO 5662
ASTM D 1275 B
Non Corrosive
Non Corrosive
12 Anti Oxidant Additives % IEC 666 Not Detectable
100
o
C, 164 Hrs
IEC 74
Neutralization Value mg KOH /gm 0.4
Sludge % 0.1
(Version # 4 1
st
October, 2014)
TransformerOils

POWEROIL
POWEROIL TO 1020 - 60 H
POWEROIL TO 1020 - 60 H is an Uninhibited Transformer Oil meeting IEC 60296 - 2012 – 02 Edition 4.0 Standard
Table – 2 - General Specifications. It also meets the ASTM D 1275 B Test requirement for Corrosive Sulphur.
Min Max
1 Appearance Visual inspection of oil
sample in transmitted light
under a thickness of 10 cm
at ambient temperature
2 Density at 20
o
C g /ml ISO 3675 or IEC 12185 0.895
o
C mm
2
/ sec ISO 3104 12
at - 30
o
C 1800
4 Flash Point, PMCC
o
C ISO 2719 135
5 Pour Point
o
C ISO 3016 - 40
o
C mN / m EN 14210 or ASTM D 971
( Where it is used as
general requirement )
No General Requirement
40 min
7 Acidity mg KOH/ gm IEC 62021-1or IEC 62021-2 0.01
8 Water Content,Bulk/ Drum,IBC mg / kg IEC 60814 30 / 40
(Tan δ )at 90
o
C & 40 to 60 Hz
IEC 60247 or IEC 61620 0.005
Silver Strip, 100
o
C, 18 Hrs
Copper Strip , 150
o
C, 48 Hrs
DIN 51353
ASTM D 1275 B
Not Corrosive
Not Corrosive
12 Potentially Corrosive Sulphur IEC 62535 Not Corrosive
13 DBDS mg / kg IEC 62697-1(in preparation) Not Detectable (< 5 mg/kg )
14 Total Sulphur Content % IP 373 or ISO 14596 No General Requirement
15 Inhibitors of IEC 60666
( Anti Oxidant additives )
% IEC 60666 ( U ) Uninhibited Oil
Not Detectable (< 0.01 % )
16 Metal Passivator additives of
IEC 60666
mg / kg IEC 60666 Not Detectable (< 5 mg/kg )
17 Other Additives Does not contain
any additives
120
o
C, 164 Hrs
IEC 61125 Method C
Total Acidity mg KOH /gm 1.9.4 of IEC 61125 : 1992 1.2
Sludge % 1.9.1 of IEC 61125 : 1992 0.8
DDF at 90
o
C 1.9.6 of IEC 61125
Amendment 1 ( 2004 ) +
IEC 60247
0.500
19 Gassing Tendency μ L / min IEC 60628 : 1985 Method A No General Requirement
20 PCA Content % IP 346 3
21 PCB Content mg / kg IEC 61619 Not Detectable ( < 2mg /kg)
22 2 – Furfural and related
compounds content
mg / kg IEC 61198 Not Detectable
(< 0.05 mg/kg ) for each
individual compound
23 Stray Gassing See 6.22 of IEC 60296 No General Requirement
24 ECT See 6.14 of IEC 60296 No General Requirement
25 Particle Content IEC 60970 No General Requirement
(Version # 4 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 1020 - 60 HT
POWEROIL TO 1020 - 60 HT is a High Grade Trace Inhibited Transformer Oil with higher oxidation stability and low sulphur
content meeting the IEC 60296 - 2012 – 02 Edition 4.0 Standard - Specific Requirements for Special Applications
Specification. It also meets the ASTM D 1275 B Test requirement for Corrosive Sulphur.
Min Max
under a thickness of 10 cm at
ambient temperature
2 Density at 20
o
C g / ml ISO 3675 or IEC 12185 0.895
o
C mm
2
/ sec ISO 3104 12
at - 30
o
C 1800
4 Flash Point, PMCC
o
C ISO 2719 135
5 Pour Point
o
C ISO 3016 - 40
o
40 min
7 Acidity mg KOH/ gm IEC 62021-1 or IEC 62021-2 0.01
8 Water Content , Bulk / Drum, IBC mg / kg IEC 60814 30 / 40
(Tan δ )at 90
o
C & 40 to 60 Hz
IEC 60247 or IEC 61620 0.005
Silver Strip, 100
o
C, 18 Hrs
Copper Strip , 150
o
C, 48 Hrs
DIN 51353
ASTM D 1275 B
Non Corrosive
Non Corrosive
13 DBDS mg / kg IEC 62697- 1 ( in preparation) Not Detectable (< 5 mg/kg )
14 Total Sulphur Content % IP 373 or ISO 14596 0.05
15 Anti Oxidant Additives % IEC 60666 ( T ) Trace Inhibited Oil
0.08 max
IEC 60666
17 Other Additives Does not contain any
additive other than
antioxidant additive
120
o
C, 332 Hrs
IEC 61125 Method C
Sludge % 1.9.1 of IEC 61125 : 1992 0.05
DDF at 90
o
C 1.9.6 of IEC 61125
IEC 60247
0.05
compounds content
( < 0.05 mg /kg ) for each
individual compound
(Version # 5 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 1020 - 60 HX
POWEROIL TO 1020 - 60 HX is a High Grade Inhibited Transformer Oil with higher oxidation stability and low sulphur
content meeting the IEC 60296 - 2012 – 02 Edition 4.0 Standard - Specific Requirements for Special Applications
Min Max
under a thickness of 10 cm at
ambient temperature
2 Density at 20
o
C g / ml ISO 3675 or IEC 12185 0.895
o
C mm
2
/ sec ISO 3104 12
at - 30
o
C 1800
4 Flash Point, PMCC
o
C ISO 2719 135
5 Pour Point
o
C ISO 3016 - 40
o
40 min
7 Acidity mg KOH/ gm IEC 62021-1 or IEC 62021- 2 0.01
(Tan δ )at 90
o
C & 40 to 60 Hz
IEC 60247 or IEC 61620 0.005
Silver Strip, 100
o
C, 18 Hrs
Copper Strip , 150
o
C, 48 Hrs
DIN 51353
ASTM D 1275 B
Non Corrosive
Non Corrosive
13 DBDS mg / kg IEC 62697-1 ( in preparation) Not Detectable (< 5 mg/kg )
15 Anti Oxidant Additives % IEC 60666 ( I ) Inhibited Oil
0.08 to 0.4 max
IEC 60666
additive other than
120
o
C, 500 Hrs
IEC 61125 Method C
Sludge % 1.9.1 of IEC 61125 : 1992 0.05
DDF at 90
o
C 1.9.6 of IEC 61125
IEC 60247
0.05
compounds content
individual compound
(Version # 5 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 1020 - 60 SNX
POWEROIL TO 1020 - 60 SNX is a severely Hydrotreated High Grade Inhibited Transformer Oil with higher oxidation
stability and low sulphur content meeting the IEC 60296 - 2012 – 02 Edition 4.0 Standard - Specific Requirements for
Special Applications Specification. It also meets the ASTM D 1275 B Test requirement for Corrosive Sulphur.
Min Max
2 Density at 20
o
C g / ml ISO 3675 or IEC 12185 0.895
o
C mm
2
/ sec ISO 3104 12
at - 30
o
C 1800
4 Flash Point, PMCC
o
C ISO 2719 135
5 Pour Point
o
C ISO 3016 - 40
o
40 min
7 Acidity mg KOH/ gm IEC 62021-1or IEC 62021- 2 0.01
(Tan δ )at 90
o
C & 40 to 60 Hz
IEC 60247 or IEC 61620 0.005
Silver, 100
o
C, 18 Hrs
Copper, 150
o
C, 48 Hrs
DIN 51353
ASTM D 1275 B
Non Corrosive
Non Corrosive
15 Presence of oxidation inhibitor % IEC 60666 ( I ) Inhibited Oil
0.08 to 0.40
IEC 60666
additive other than
at 120
o
C, 500 Hrs
IEC 61125 Method C
Sludge % 1.9.1 of IEC 61125 : 1992 0.05
DDF at 90
o
C 1.9.6 of IEC 61125
IEC 60247
0.05
19 Gassing Tendency IEC 60628: 1985 Method A No general requirement,
21 PCB Content mg / kg IEC 61619 Not Detectable ( <2 mg /kg)
compounds content
individual compound
(Version # 5 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 1020 - 60 UX
POWEROIL TO 1020 - 60 UX is an Inhibited Transformer Oil meeting IEC 60296 -2012 – 02 Edition 4.0 Standard
Table – 2 General Specifications. It also meets the ASTM D 1275 B Test requirement for Corrosive Sulphur.
Min Max
2 Density at 20
o
C g / ml ISO 3675 or IEC 12185 0.895
o
C mm
2
/ sec ISO 3104 12
at - 30
o
C 1800
4 Flash Point, PMCC
o
C ISO 2719 135
5 Pour Point
o
C ISO 3016 - 40
o
C m N / m EN 14210 or ASTM D 971
(( Where it is used as
40 min
7 Acidity mg KOH/ gm IEC 62021-1 or IEC 62021-2 0.01
8 Water Content , Bulk / Drum,IBC mg / kg IEC 60814 30 / 40
(Tan δ )at 90
o
C & 40 to 60 Hz
IEC 60247 or IEC 61620 0.005
Silver Strip, 100
o
C, 18 Hrs
Copper Strip , 150
o
C, 48 Hrs
DIN 51353
ASTM D 1275 B
Non Corrosive
Non Corrosive
IEC 60666
additive other than
anti oxidant additive
16 Total Sulphur Content % IP 373 or ISO 14596 No General Requirement
17 Anti Oxidant Additives % IEC 60666 ( I ) Inhibited Oil
0.08 min to 0.40 max
120
o
C, 500 Hrs
IEC 61125 Method C
Sludge % 1.9.1 of IEC 61125 : 1992 0.8
DDF at 90
o
C 1.9.6 of IEC 61125
IEC 60247
0.500
21 PCB Content mg / kg IEC 61619 Not Detectable ( < 2 mg /kg)
compounds content
(< 0.05 mg / kg) for each
individual compound
(Version # 5 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 1020 AUT
POWEROIL TO 1020 AUT is a Trace Inhibited Transformer Oil meeting the ASTM D 3487 - 2009 Type I Standard
Min Max
1 Visual Examination Simple visual
examination of the
oil sample
Clear and bright
2 Aniline Point
o
C ASTM D 611 63
4 Specific Gravity 15
o
C / 15
o
C ASTM D 1298 0.91
o
C cSt ( SUS ) ASTM D 445 / D 88 3.0 ( 36 )
at 40
o
C 12.0 ( 66 )
at 0
o
C 76 ( 350 )
6 Flash Point, COC
o
C ASTM D 92 145
7 Pour Point
o
C ASTM D 97 - 40
o
C dynes / cm ASTM D 971 40
9 Neutralization Number,
Total Acid Number
mg KOH/ gm ASTM D 974 0.03
10 Water Content ppm ASTM D 1533 35
11 Breakdown Voltage at 60 Hz
Disc electrode
kV ASTM D 877 30
12 Breakdown Voltage
Impulse conditions 25
o
C ,
needle negative to sphere
grounded, 1- in ( 25.4 mm ) gap
kV ASTM D 3300 145
(Tan δ ) at 60 Hz at 25
o
C
at 100
o
C
ASTM D 924
0.05
0.30
Copper Strip, 140
o
C, 19 Hrs
Copper Strip , 150
o
C, 48 Hrs
ASTM D 1275 A
ASTM D 1275 B
Non Corrosive
Non Corrosive
15 Oxidation Inhibitor Content % ASTM D 1473 or D 2668 0.08
at 110
o
C, 72 Hrs
ASTM D 2440
Total Acid Number mg KOH /gm 0.5
Sludge % 0.15
at 110
o
C , 164 Hrs
Sludge % 0.3
17 Gassing Tendency at 80
o
C
Procedure B Test Voltage 10 kV
μ L / min ASTM D 2300
by Procedure B
+ 30
18 PCB Content ppm ASTM D 4059 Not Detectable
(Version # 5 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 1020 AUX
POWEROIL TO 1020 AUX is an Inhibited Transformer Oil meeting the ASTM D 3487 - 2009 Type II Standard Specification.
Min Max
1 Visual Examination Simple visual
examination of the
oil sample
Clear and bright
2 Aniline Point
o
C ASTM D 611 63
4 Specific Gravity 15
o
C / 15
o
C ASTM D 1298 0.91
o
C cSt ( SUS ) ASTM D 445 or D 88 3.0 ( 36 )
at 40
o
C 12.0 ( 66 )
at 0
o
C 76 ( 350 )
6 Flash Point, COC
o
C ASTM D 92 145
7 Pour Point
o
C ASTM D 97 - 40
o
C dynes / cm ASTM D 971 40
9 Neutralization Number,
Total Acid Number
mg KOH/ gm ASTM D 974 0.03
10 Water Content ppm ASTM D 1533 35
11 Breakdown Voltage at 60 Hz
Disc electrode
kV ASTM D 877 30
12 Breakdown Voltage
Impulse conditions 25
o
C ,
needle negative to sphere
grounded, 1- in ( 25.4 mm ) gap
kV ASTM D 3300 145
(Tan δ ) at 60 Hz at 25
o
C
at 100
o
C
ASTM D 924
0.05
0.30
Copper Strip, 140
o
C, 19 Hrs
Copper Strip , 150
o
C, 48 Hrs
ASTM D 1275 A
ASTM D 1275 B
Non Corrosive
Non Corrosive
15 Oxidation Inhibitor Content % ASTM D 1473 or D 2668 0.3
at 110
o
C, 72 Hrs
ASTM D 2440
Sludge % 0.1
at 110
o
C , 164 Hrs
Sludge % 0.2
( Rotating Bomb Test )
Minutes ASTM D 2112 195
18 Gassing Tendency at 80
o
C
Procedure B Test Voltage 10 kV
μ L / min ASTM D 2300
by Procedure B
+ 30
19 PCB Content ppm ASTM D 4059 Not Detectable
(Version # 5 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 20 BS
POWEROIL TO 20 BS is an Uninhibited Transformer Oil meeting BS 148 Class I : 1984 Standard Specification.
Min Max
ambient temperature
2 Density at 20
o
C kg / dm
3
BS 4714 0.895
o
C mm
2
/ sec BS 2000 Part 71 16.5
at - 15
o
C 800
4 Flash Point, PMCC
o
C BS 2000 Part 34 140
5 Pour Point
o
C BS 2000 Part 15 - 30
As Delivered kV 30
(Tan δ )at 90
o
C & 40 to 62 Hz
BS 573 0.005
Copper Strip, 140
o
C, 19 Hrs
BS 5680 : 1979 Non Corrosive
11 Antioxidant Additives % BS 5984 : 1980 Not Detectable
at 120
o
C, 164 Hrs
Sludge % 1.0
after 120 minutes
mm
3
(Version # 4 1
st
October, 2014)
TransformerOils

POWEROIL
POWEROIL TO 20 BS X
POWEROIL TO 20 BS X is an Inhibited Transformer Oil meeting BS 148 Class I A : 1984 Standard Specification.
Min Max
ambient temperature
2 Density at 20
o
C kg / dm
3
BS 4714 0.895
o
C mm
2
/ sec BS 2000 Part 71 16.5
at - 15
o
C 800
4 Flash Point, PMCC
o
C BS 2000 Part 34 140
5 Pour Point
o
C BS 2000 Part 15 - 30
As Delivered kV 30
(Tan δ )at 90
o
C & 40 to 62 Hz
BS 573 0.005
Copper Strip, 140
o
C, 19 Hrs
BS 5680 : 1979 Non Corrosive
11 Antioxidant Additives % BS 5984 : 1980 No Requirement
at 120
o
C, 164 Hrs
Sludge % 0.01
at 120
o
C, 500 Hrs
Sludge % 1.0
after 120 minutes
mm
3
(Version # 4 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 20
POWEROIL TO 20 is an Uninhibited Transformer Oil meeting IEC 296 Class I : 1982 Standard Specification.
Min Max
ambient temperature
2 Density at 20
o
C kg / dm
3
ISO 3675 0.895
o
C mm
2
/ sec ISO 3104 16.5
at - 15
o
C 800
4 Flash Point, PMCC
o
C ISO 2719 140
5 Pour Point
o
C ISO 3016 - 30
o
C N / m ISO 6275 0.04
(Tan δ )at 90
o
C & 40 to 60 Hz
IEC 247 0.005
Copper Strip, 140
o
C, 19 Hrs
ISO 5662 Non Corrosive
12 Anti Oxidant Additives % IEC 666 Not Detectable
100
o
C, 164 Hrs
IEC 74
Neutralization Value mg KOH /gm 0.4
Sludge % 0.1
(Version # 4 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 20 X
POWEROIL TO 20 X is an Inhibited Transformer Oil meeting IEC 296 Class I A : 1982 Standard Specification.
Min Max
ambient temperature
2 Density at 20
o
C kg / dm
3
ISO 3675 0.895
o
C mm
2
/ sec ISO 3104 16.5
at - 15
o
C 800
4 Flash Point, PMCC
o
C ISO 2719 140
5 Pour Point
o
C ISO 3016 - 30
o
C N / m ISO 6275 0.04
(Tan δ )at 90
o
C & 40 to 60 Hz
IEC 247 0.005
Copper Strip, 140
o
C, 19 Hrs
ISO 5662 Non Corrosive
12 Anti Oxidant Additives % IEC 666
( Limits given as
guideline only )
0.15 0.40
100
o
C, 164 Hrs
IEC 74
Induction Period Hours ( Limits given as
guideline only )
120
(Version # 4 1
st
October , 2014)
TransformerOils

POWEROIL
POWEROIL TO 335 X
POWEROIL TO 335 X is an Inhibited Transformer Oil meeting Bureau of Indian Standards: IS 12463 -1988 Specification.
Min Max
the oil shall be examined
in a100 mm thick layer at
27
o
C
Oil shall be clear,
transparent and free
from suspended matter
or sediment
2 Density at 29.5
o
C g / ml IS 1448 P 16 - 1997 0.89
o
C cSt IS 1448 P 25 - 1996 27
4 Flash Point, PMCC
o
C IS 1448 P 21- 1970 140
5 Pour Point
o
C IS 1448 P10 - 1970 - 6
7 Neutralization Value
a) Total Acidity
b) Inorganic Acidity/Alkalinity
mg KOH/ gm IS 1448 P 2 - 1967
0.03
NIL
9 Specific Resistance IS 6103 - 1971
a) at 90
o
C ohm - cm 35 x 10
12
b) at 27
o
C ohm - cm 1500 x 10
12
New Unfiltered / After Filtration kV 30 / 60
(Tan δ ) at 90
o
C
IS 6262 - 1971 0.002
Copper Strip, 140
o
C, 19 Hrs
Inhibitor
% IS 13631 - 1982 0.3
100
o
C, 164 Hrs
IS 335 Annexure C
a) Total Acidity mg KOH /gm 0.4
b) Sludge % 0.1
15 Ageing characteristics after
accelerated ageing
(open beaker method with
copper catalyst)
IS 12177 – 1987 Method A
Specific Resistance at 27
o
C ohm - cm 2.5 x 10
12
(Resistivity) at 90
o
C ohm - cm 0.2 x 10
12
Dielectric Dissipation Factor
(Tan δ ) at 90
o
C
0.20
Total Acidity mg KOH/ gm 0.05
Total Sludge % 0.05
16 Oxidation Stability , RBOT Minutes 195
(Version # 4 1
st
October, 2014)
TransformerOils

POWEROIL
POWEROIL TO 335
POWEROIL TO 335 is an Uninhibited Transformer Oil meeting Bureau of Indian Standards: IS 335 -1993 (Reaffirmed -
2005) Specification.
Min Max
the oil shall be examined
in a100 mm thick layer at
27
o
C
Oil shall be clear,
transparent and free
from suspended matter
or sediment
2 Density at 29.5
o
C g / ml IS 1448 P 16 - 1997 0.89
o
C cSt IS 1448 P 25 - 1996 27
4 Flash Point, PMCC
o
C IS 1448 P 21- 1970 140
5 Pour Point
o
C IS 1448 P10 - 1970 - 6
7 Neutralization Value
a) Total Acidity
b) Inorganic Acidity/Alkalinity
mg KOH/ gm IS 1448 P 2 - 1967
0.03
NIL
9 Specific Resistance IS 6103 - 1971
a) at 90
o
C ohm - cm 35x10
12
b) at 27
o
C ohm - cm 1500x10
12
New Unfiltered / After Filtration kV 30 / 60
(Tan δ ) at 90
o
C
IS 6262 - 1971 0.002
Copper Strip, 140
o
C, 19 Hrs
Inhibitor
% IS 13631 - 1982 The oil shall not contain
antioxidant additive.
Value of 0.05 % max
shall be treated as
absence of DBPC
100
o
C, 164 Hrs
IS 335 Annexure C
a) Total Acidity mg KOH /gm 0.4
b) Sludge % 0.1
15 Ageing characteristics after
accelerated ageing
(open beaker method with
copper catalyst)
IS 12177 – 1987 Method A
Specific Resistance at 27
o
C ohm - cm 2.5 x 10
12
(Resistivity) at 90
o
C ohm - cm 0.2 x 10
12
Dielectric Dissipation Factor
(Tan δ ) at 90
o
C
0.20
Total Acidity mg KOH/ gm 0.05
Total Sludge % 0.05
(Version # 4 1
st
October , 2014)
TransformerOils

Contents
Product Page
Transformer Oils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Transformer Oil Meeting IS:335:1993 . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Inhibited Mineral Insulating Oils (For Railway) Meeting IS : 12463-1988. 4
Uninhibited Oil Meeting IEC 296-1982 Class I Speciﬁcations . . . . . . . . . 5
Uninhibited Oil Meeting BS148 Class I & II Speciﬁcations . . . . . . . . . . . 6

3
Transformer
Oils
TRANSFORMER OILS
TRANSFORMER OILS
Sah Petroleums Ltd. manufactures and markets IPOLTransformer Oils .
Routine inspection at each stage ensures a product which fully meets the required specifications. Users must store it in tank/
barrels taking precautions to prevent ingress of moisture and sediments, which can result in the product not meeting specifications.
IPOL TRANSFORMER OIL MEETING IS : 335-1993
Typical Inspections
Characteristics Test Methods IS:335:1993
Minimum Maximum
Appearance A representative sample of The oil shall be clear and
the oil shall be examined in transparent, and free from
a 100 mm thick layer at 27° C suspended matter or sediments
Density at 29.5° C g/cm3
IS:1448 (P-16) : 1977 — 0.89
Kinematic Viscosity, at 27° C cSt IS:1448 (P-25) : 1976 — 27
Interfacial Tension N/m at 27° C IS:6104 : 1971 0.04 —
Flash Point Pensky-Marten (closed), °C IS:1448 (P-21) : 1970 140 —
Pour Point, °C IS:1448 (P-10) : 1970 — (-)6
Neutralization Value IS:1448 (P-2) : 1967
1) Total acidity, mg KOH/gm 0.03
2) Inorganic acidity/alkalinity Nil
Corrosive Sulphur Copper Strip, 19 hrs at 140 ± 2° C Annex-B Non Corrosive
Electric Strength (breakdown voltage), KV (r m s) IS:6792 : 1972
1) New unfiltered oil 30 —
2) After filteration 60 —
Dielectric Dissipation Factor (tan Delta) at 90° C IS:6262 : 1971 — 0.002
Specific Resistance (resistivity, ohm-cm) IS:6103 : 1971
1) At 90° C 35 x 1012
—
2) At 27° C 1500 x 1012
—
Oxidation Stability Annex-C
1) Neutralization Value, after oxidation
for 164 hrs at 100° C mg KOH/gm — 0.40
2) Total Sludge, after oxidation for 164 hrs at 100° C. wt % — 0.10
Accelerated Ageing Test
(open beaker method with copper catalyst) 96 hrs at 115° C IS:12177 : 1987 Method A
1) Specific Resistance (resistivity) ohm-cm at 27° C IS:6103 : 1971 2.5 x 1012
—
2) Specific Resistance (resistivity) ohm-cm at 90° C IS:6103 : 1971 0.2 x 1012
—
3) Dielectric Dissipation Factor (tan Delta) at 90° C IS:6262 : 1971 — 0.20
4) Total Acidity, mg, KOH/gm IS:1448(P-2) : 1967 — 0.05
5) Total Sludge Value Annex-A of 12177 — 0.05
Presence of Oxidation Inhibitor IS:13631 : 1992 The oil shall not contain
antioxidant additives
Water Content, ppm IS:13567 : 1992 — 50
S. K. Value % wv IS:335, Annex-D — 4

4
INHIBITED MINERAL INSULATING OILS (FOR RAILWAYS) MEETING IS : 12463-1988
Typical Inspections
Characteristics Test Methods IS:12463:1988
Minimum Maximum
Appearance A representative sample of The oil shall be clear and
the oil shall be examined in transparent, and free from
a 100 mm thick layer at 27° C suspended matter or sediment.
Density at 29.5° C g/cm3
IS:1448(P-16) : 1977 - 0.89
Viscosity, Kinematic cSt 27° C IS:1448(P-25) : 1976 - 27
Interfacial Tension N/m at 27° C IS:6104 : 1971 0.04 -
Flash Point Pensky-Marten (closed), °C IS:1448(P-21) : 1970 140 -
Pour Point, °C IS:1448(P-10) : 1970 - (-) 6
Neutralization Value IS:1448(P-2) : 1967
1) Total acidity, mg KOH/gm 0.03
2) Inorganic acidity / alkalinity NIL
Corrosive Sulphur Annex-A of IS:335-1983 Non Corrosive
Electric Strength (breakdown voltage), KV (r m s) IS:6792 : 1972
1) New unfiltered oil 30 -
2) After filteration 60 -
Dielectric Dissipation Factor (tan Delta) at 90° C IS:6262 : 1971 - 0.002
Specific Resistance (resistivity, ohm-cm) IS:6103 : 1971
1) At 90° C 35 x 1012
-
2) At 27° C 1500 x 1012
-
Oxidation Stability IS:12422-1988
1) Neutralization Value, after oxidation mg KOH/gm - 0.40
2) Total Sludge, after oxidation, by mass - 0.10
Oxidation Stability (rotating bomb test), minutes 195 -
Oxidation Inhibitor Content, % by mass Appendix D of IS:335-1993 - 0.3
Water Content, ppm IS:2362 : 1973 - 50
TRANSFORMER OILS

5
UNINHIBITED OIL MEETING IEC 296-1982 CLASS I SPECIFICATIONS
Typical Inspections
Characteristics Test Methods IEC:296:1982 Class I Uninhibited
Minimum Maximum
Appearance Transparent clear colourless,
— odourless liquid free from
suspended impurities
Kinematic Viscosity, mm2
/S at 40° C BS EN ISO 3104 – 16.5
/S at -15° C BS EN ISO 3104 – 800
Flash Point °C, Pensky-Marten (closed) BS EN ISO 2719 140 –
Pour Point °C BS 2000 (P:15) ≤ (-)30
Density kg/m3
, at 20° C BS EN ISO 3675 -- 0.895
Neutralisation Value mg KOH/g BS 2000 (P:1) -- 0.03
Corrosive Sulphur DIN 51553/BS 5680 Non Corrosive
Water Content, mg/kg
1) Bulk Delivery IEC 60814 – 20
2) Drum Delivery – 30
Anti-Oxidant Additives IEC 60666 / BS 5984 Not Detectable
Oxidation Stability, 164 hrs
1) Neutralisation Value mg KOH/g BS EN 61125 Method A – 0.4
2) Total Sludge % – 0.1
Breakdown Voltage, as delivered, (KV) BS EN 60156 30 –
Breakdown Voltage, after treatment, (KV) (for IEC 296) 50 –
Dielectric Dissipation Factor at 90° C BS 5737 – 0.005
Gassing Tendency at 50 Hz after 120 min. mm3
/min, Method A BS 5797 – (+)5
Total PCB Content mg/kg BS EN 61619 Not Detectable
Total Furans mg/kg BS 61198 -- 1.00
Polycyclic Aromatics % mass BS 2000 (P:346) -- 3.00
TRANSFORMER OILS

6
UNINHIBITED OIL MEETING BS 148 CLASS I & CLASS II SPECIFICATIONS
Typical Inspections
Characteristics BS:148 Class I Uninhibited Oil BS:148 Class II Uninhibited Oil
Minimum Maximum Minimum Maximum
/S at 40° C -- 16.5 -- 11.0
/S at 20° C -- 40.0 -- 25.0
/S at -15° C -- 800 -- 1800
Flash Point, Pensky-Marten (closed), °C 140 -- 130 --
Pour Point, °C -- (-)30 -- (-)45
Appearance Clear, free from sediments & Clear, free from sediments &
suspended matter suspended matter
Density, kg/gm3
at 20° C -- 0.895 -- 0.895
Interfacial Tension, N/m at 25° C 0.04 -- 0.04 --
Neutralisation Value, mg KOH/gm -- 0.03 -- 0.03
Corrosive Sulphur Non Corrosive Non Corrosive
Water Content, mg/kg
1) Bulk Delivery -- 30 -- 30
2) Drum Delivery -- 40 -- 40
Antioxident Additives Non Detectable Non Detectable
Oxidation Stability at 120° C for 164 hrs.
1) Total Acidity, mg KOH/gm of oil -- 1.50 -- 1.50
2) Sludge, % by mass -- 1.0 -- 1.0
Breakdown Voltage, as delivered, KV 30 -- 30 --
Breakdown Voltage, after treatment, KV -- -- 50 --
Dissipation Factor at 90° C and 40 Hz to 62 Hz -- 0.005 -- 0.005
Gassing Tendency at 50 Hz after 120 min, mm3
/min -- (+)5 -- (+)5
PCB Content, % mass Nil Nil
TRANSFORMER OILS

6/15/2017 Transformer Oil
http://panamapetro.com/transformeroil/ 1/2
Search here 
 Home  Transformer OilTRANSFORMER OIL
Speci cations of PANTRANSOL OIL AS PER BS 148 (CLASS I) View
Speci cations of PANTRANSOL OIL AS PER IEC-296 (CLASS I) View
Speci cations of PANTRANSOL OIL AS PER IEC-296 (CLASS II) View
Speci cations of PANTRANSOL OIL AS PER IS 335-1993 View
Speci cations of PANTRANSOL OIL IEC-60296 View
MSDS of TRANSFORMER OIL View
Transformer Oils manufactured by Panama Petrochem Ltd are from selected,
severely Hydrotreated Naphthemc & Isodewaxed / Hydrocracked Paraf nic
Oils and Naphthenic Oils that are free from polar compounds, having high
oxidation stability and ageing properties. The ultra low sulphur and wax free
Naphthenic Oils/Paraf nic oils along with low Viscosity Index ensure
excellent cooling characteristics, high solvency and low corrosivity. These
optimally re ned Transformer Oils also possess very good electrical and
insulating properties, oxidation stability and controlled low or negative
gassing tendency.
Panama Petrochem Ltd manufactures Transformer Oils that meet the
following standards:
IS 335:1993
IEC 296 Class I & II
IEC 60296
BS148 Grade I & II
PANTRANSOL OIL BS 148 (CLASS I)
PANTRANSOL OIL IEC-296 (CLASS I)
PANTRANSOL OIL IEC-296 (CLASS II)
PANTRANSOL OIL IS 335-1993
PANTRANSOL OIL IEC-60296
MATERIAL SAFETY DATA SHEET (MSDS)
PRODUCTS RANGE
White Oil/Liquid Paraf n Oil
Petroleum Jelly
Transformer Oil
Ink and Coating Oils
Rubber Process Oil
Textile Industry
Industrial Oils and Greases
Automotive Oils
Drilling Fluids
Waxes
HOME ABOUT US PRODUCTS INVESTOR RELATIONS CAREERS MEDIA CONTACT US

of 16
Annexure-I
SCHEDULE CUM MATERIAL SPECIFICATION OF TRANSFORMER OIL
AS PER IS:335/1983 AMENDMENT 1& 2
ANNEXURE –I TO TENDER NO. Pur. 1.62.0080/ 4147 dt. 08/12/2011
Item Serial No: 001 Catalog Number: 22/02051578707
Description : NAPTHENE BASED TRANSFORMER OIL GR.II AS PER IS: 335/1983,
WITH AMENDMENT NO. 1 & 2.
Quantity : 150000 LTRS
SPCIFICATION OF TRANSFORMER OIL FOR USE IN EHV INSTALLATIONS.
S.NO CHARACTERISTICS REQUIREMENTS METHOD OF TEST
1
Appearance
The oil shall be clear and
transparent and free from
suspended matter or sediments
A representative sample of
the oils shall be examined in
a 100 mm thick layer at
ambient temperature.
2 Density at 29.50
c Max. 0.89gm/cm3
IS: 1448
C (Max) 27 cST IS:1448
4 Inter facial tension at 270
(Min) 0.04 N/M IS:6104
5 Flash Point Pensky-Marten(Closed), (Min) 1400
C IS 1448
6 Pour Point (Max) -60
C IS 1448
7 Neutralization Value(Total Acidity), Max. 0.03mg KOH/gm IS: 335 Appendix A
8 Corrosive Sulphur (in terms of classification of
copper strip)
Non corrosive IS:335 appendix B
9 Electric Strength(Min) (Break down voltage) of
Treated oil.
60 KV(rms) IS:6792
10. Dielectric dissipation factor(Tan Delta) at 900
C
Max
0.002 IS 6262
11. Resistivity (Min)(Ohm cm)
a) At 900
C
b) At 270
C
35 x 10 12
Ohm. Cm
1500 x 1012
Ohms.cm
IS:6103
12. Oxidation stability
a)Neutralization value after oxidation
(Max)
b) Total Sludge after oxidation (Max)
0.40 mg KOH/gm
0.10 % by weight
13. Presence of Oxidation inhibitor The oil shall not contain anti
oxidant additives.
IS: 335 Appendix-D
14. Water content after treatment (Max) 10 ppm IS:1866
15. Ageing characteristics after 96 hours as per
ASTMD-1934/IS12177 with catalyst(copper)
a) Resistivity (Min)(ohm-cm)
1) At 900
C
2) At 270
C
b) Tan delta at 900
C
c) Total Acidity, (Max)
d) Sludge content Wt.( Max)
0.2 X 10 12
Ohm-cm
2.5 x 1012
Ohm-cm
0.2
0.05 mg KOH/gm
0.05% (by weight
16. PCB content Below detection limit Schedule 5&6 of GOI/ME&F
Notification No. 471
dt.20.05.2003.
17. Packing 1) Oil shall be supplied in clean steel drum of 210 ltrs nominal
capacity confirming to type A or B IS-1783
2) Oil drum shall be nitrogen pressurized and effectively
sealed to avoid ingress of moisture.
NOTE: SL.NO.16 PCB content test (One sample) shall be done at any approved labs by Ministry of Environment and
Forests, Govt of India.

of 16
B. Special Instruction:
NOTE:INVARIABLY THE SUPPLIER SHOULD SUBMITT THE MATERIAL SAFETY DATA SHEET
ALONG WITH THEIR OFFER.
C. DELIVERY:
TRANSFORMER OIL AS PER IS:335/1983 AMENDMENT 1& 2 with end delivery
schedule by 30.04.2012

Notes transformer oil

Recommandé

Recommandé

Contenu connexe

Tendances

Tendances (20)

Similaire à Notes transformer oil

Similaire à Notes transformer oil (20)

Plus de M Hussam Adeni

Plus de M Hussam Adeni (20)

Dernier

Dernier (20)

Notes transformer oil