Transformer oils

POWEROIL® Transformer Oil

The power to protect transformers from within.

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The APAR difference

Since 1969, APAR has pioneered the manufacturing of internationally benchmarked grades of high-performance
transformer oils in India. Our oils are more environment friendly, offer higher oxidation stability, lower gassing
tendency and are non corrosive in nature, with ultra-low sulphur levels.

The entire POWEROIL transformer oil range was developed through in-house R&D efforts. POWEROIL has
delighted customers in over 125 countries, and charged millions of transformers with POWEROIL.

APAR offers the most comprehensive range of transformer oils, including both naphthenic and iso--paraffinic grades
conforming to all major international standards. We also have the largest range of customised grades.

We have consistently created local and global records. Watch how.

Globally APAR is the first company to introduce a comprehensive range of iso-paraffinic transformer oils which have excellent electrical and heat transfer properties, as well as a low pouring point and high oxidation stability.

APAR is an active member in the working groups of IEC, CIGRE and BIS committees in setting performance standards for transformer oils.

We are also the world’s first company to supply the entire range of transformer oils with full compliance to the newly introduced corrosive sulphur standards as per IEC 62535, DIN 51353, ASTM D 1275 and Cigre TF A2. 32.01.

APAR was the first Indian manufacturer, and one of the earliest global manufacturers, to have a range of transformer oils approved for ultra high voltage transformers in the 765 kV AC, 800 kV HVDC and 1200 kV AC classes.

Fire-resistant fluids

PRODUCT NAME	TYPE	CONFORMING TO STANDARD
TO HFLL	K Class Mineral Oil	ASTM D 5222 – 16
TO NE	K Class Natural Ester	IS: 16659 – 2017 / IEC 62770 – 2013 Bio-degradeable
TO NE	K class Natural Ester oil	IEC 62770-2013

Premiuim grades

PRODUCT NAME	TYPE	CONFORMING TO STANDARD
TO 1020 60 U	Uninhibited	IS: 335 – 2018 – Type I
TO 1020 60 UT	Trace Uninhibited	IS: 335 – 2018 – Type I
TO 1020 60 UX	Inhibited	IS: 335 – 2018 – Type I
TO 1020 60 H	Uninhibited	IS: 335 – 2018 – Type I
TO 1020 60 HT	Trace Uninhibited	IS: 335 – 2018 – Type I
TO 1020 60 HX	Inhibited High Grade	IS: 335 – 2018 – Type I
TO 1020 60 SNX	Inhibited High Grade	IS: 335 – 2018 – Type I
TO 1020 60 U	Uninhibited	IEC : 60296 – 2020 Type B Standard Grade oil
TO 1020 60 UT	Trace Uninhibited	IEC : 60296 – 2020 Type B Standard Grade oil
TO 1020 60 UX	Inhibited	IEC : 60296 – 2020 Type B Standard Grade oil
TO 1020 60 SNX	Inhibited High Grade	IEC : 60296 – 2020 Type A High Grade Oil
TO 1020 60 H	Uninhibited	IEC : 60296 – 2020 Type B Standard Grade oil
TO 1020 60 HT	Trace Inhibited	IEC : 60296 – 2020 Type B Standard Grade oil
TO 1020 60 HX	Inhibited High Grade	IEC : 60296 – 2020 Type A High Grade Oil
TO 1020 AUT	Trace Inhibited	ASTM D 3487- 2016 TYPE I
TO 1020 AUX	Inhibited	ASTM D 3487- 2016 TYPE II

Superior grades

PRODUCT NAME	TYPE	CONFORMING TO STANDARD
TO 10	Uninhibited	IEC 296 Class II:1982
TO 10 BS	Uninhibited	BS 148 Class II:1984
TO 10 X	Inhibited	IEC 296 Class IIA :1982
TO 10 BS X	Inhibited	BS 148 Class IIA :1984
TO 1020	Uninhibited	IEC 296 Class I & II:1982
TO 1020 BS	Uninhibited	BS 148 Class I & II:1984
TO 1020 X	Inhibited	IEC 296 Class I A& IIA :1982
TO 1020 BS X	Inhibited	BS 148 Class IA & II A:1984

Standard grades

PRODUCT NAME	TYPE	CONFORMING TO STANDARD
TO 335 H	Uninhibited	IS 335-2018 Type II
TO 335 HT	Trace Inhibited	IS 335-2018 Type II
TO 335 HX	Inhibited	IS 335-2018 Type II
TO 20	Uninhibited	IEC : 296-1982 Class I
TO 20 BS	Uninhibited	BS : 148-1984 Class I
TO 20 X	Inhibited	IEC : 296-1982 Class I A
TO 20 BS X	Inhibited	BS : 148-1984 Class I A