DAEDO LUBRICANTS CO., LTD.
Specialty Products Division
ISOLECT®
ISOLECT DX®
MINERAL TRANSFORMER OIL
ISOLECT® oil is a highly refined, hydroprocessed dielectric fluid. It conforms to ASTM
D3487 type I and IEC296 class I for un-inhibited transformer mineral oil, and is used as an
insulating and cooling medium in oil-insulated electrical equipment such as distribution, padmount, power transformers, oil circuit breakers, X-ray equipment, etc.
ISOLECT DX® conforms to ASTM D3487 type II and IEC296 class IIA for inhibited
transformer mineral oil and is used where improved oxidation resistance is desired such as
those in conservator type power transformers.
AVAILABILITY: 200 liters steel drum or in bulk
TYPICAL PROPERTIES:
Property
Color
Visual examination
Density @ 20oC
Interfacial tension, dynes/cm
Kinematic viscosity @ 40oC, cSt
Flash point, oC
Neutralization number, mgKOH/g
Corrosive sulfur
Power factor @25oC, 60Hz, %
Power factor @100oC, 60Hz, %
Moisture content, ppm
Dielectric breakdown voltage, kV
Oxidation stability @120oC, 164hrs
Neutralization number, mgKOH/g
Sludge, % by mass
Inhibitor content, %
Gassing tendency, µl/min
PCB content, ppm
ASTM
Method
ASTM D3487
Specification
D 1500
D 1524
D 1298
D 971
D 445
D 92
D 974
D 1275B
D 924
D 924
D 1533B
D 877
D 2440
L0.5 max.
Clear and bright
0.91 max.
40 min.
12.0 max.
145 max.
0.03 max.
Non-corrosive
0.05 max.
0.3 max.
35 max.
30
Type I
Type II
0.6 max.
0.4 max.
0.3 max.
0.2 max.
L0.5
Clear and bright
0.838
0.838
44.9
44.9
7.40
7.52
155
155
0.005
0.005
Non-corrosive
0.020
0.020
0.124
0.124
12
12
48
48
0.08 max.
0.3 max.
+ 30 max.
Non-detected
N.D.
0.22
+ 0.8
+ 0.8
Non-detected
D 2668
D 2300B
D 4059
ISOLECT
0.3
0.1
ISOLECT
DX
0.03
0.01
Typical test data are average values only. Minor variations which do not affect product performance are to be
expected in normal manufacturing.