Turbine oil and transformer oil standard testing parameters

 

TURBINE OIL STANDARD PARAMETERS
OIL: Servo prime 46T
Testing frequency: Every 6 months
Sl No.	Oil Property	UOM	Test Method	Acceptable limits
1	Appearance	NA	Visual	Clear/yellow Viscous liquid
2	Colour	Hazen	ASTM D1500	< 2
3	Density	Kg/m3	IS 1448-P-16:1990	820-870
4	Flash Point	0C	ATM D 93	> 180
5	Kinematic Viscosity at 40 0C	Cst	ATM D 445-17a	43-48
6	Kinematic Viscosity at 100 0C	Cst	ATM D 445-17a	>6.7
7	Viscosity index	NA	ASTM D 2270	> 98
8	RPVOT (Revolving Presure Vessel Oxidation  Stabilty Test)	Minutes	ASTM D 2272	>25% (minimum)
9	Total acid number (TAN)	mg/KOH/g	ASTM D 974	<0.2
10	Elemental analysis (Metal like Fe,Cu,Cr,Al, Ni, Sn, Si etc wear analysis)	ppm	ASTM D 5185	< 20
11	Sediments	%	IS 1866:2000	<0.01
12	Moisture content	ppm	ASTM D 6304	<1000
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TRANSFORMER OIL STANDARD PARAMETERS
OIL: Transformer oil
Testing frequqency: 1 year
Sl No.	Oil Property	UOM	Test Method	Acceptable limits
1	Appearance	NA	Visual	Clear free from sediments & suspended matter
2	Density	Kg/m3	IS:1448(P:16)1990 (RA 2014)	890 max
3	Flash Point	0C	IS 1448(P:21)-2012/ATM D 93	>125
4	Pour point	0C	IS-1448 (P-10)	-6
5	Kinematic Viscosity at 27 0C	Cst	IS:1448(P:25)-1976 (RA 2007)	<27
6	Total acid number (TAN)	mg/KOH/g	S: 1448(P:2)-2007/ASTM D 974	<0.03
7	Sediments	%	IS 1866:2000	Should not be detective or <0.01
8	Moisture content	mg/kg	IS: 13567-1992 (RA 2008) /IEC-814/ASTM D 6304	<50
9	Breakdown voltage (Dielectric strength)	kv	IS: 6792-1992 (RA 2008)	40 kV
10	Tan Delta (Di–Electric Dissipation Factor) in absolute, at a Temp:900C	Degree	IS: 6262-1971 (RA 2011)	<1
11	Resistivity (Specific Resistance) at 90 deg C	Ω-cm	IS: 6103-1971 (RA 2011)	>35 X1012
12	Dissolved gas analysis		IS: 10593:2006  & 9434-1992  (RA 2008) or IEC 567
a	Methane (CH4)	ml/l		100-150 (oil life 4 to 10 years)
b	Ethylene (C2H4)	ml/l		15-200 (oil life 4 to 10 years)
c	Ethane (C2H6)	ml/l		100-150(oil life 4 to 10 years)
d	Acetylene(C2H2)	ml/l		30-50(oil life 4 to 10 years)
e	Carbon Monoxide(Co)	ml/l		400-500(oil life 4 to 10 years)
f	Carbon Dioxide (Co2)	ml/l		4000-5000(oil life 4 to 10 years)
g	Hydrogen (H2)	ml/l		200-300(oil life 4 to 10 years)
13	Interfacial Tension (IFT)	N/m	IS: 6104-1971 Ring Method (RA 2011)/ASTM D 971	> 0.015

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