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DATE JOB
March 19. 1976 IC/FF-57 Master Copy W. D. Lubic
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TECHNICAL DATA SHEET MCS-1865 AND MCS-1866
TRANSFORMER FLUIDS
No. IC/FF-57 (Date: Mo/Yr)
Fluids for use in liquid-filled transformers should have high dielectric strength, wide operating temperature range, good heat transfer properties, chemical stability and be fire resistant*. MCS-1865 and MCS-1866 were developed to provide such characteristics, and are suggested for evaluation as di electric fluids for transformers. These fluids have a consider able degree of fire resistance, but are not equivalent to askarels in this gone ml--chagaatogi.pt; i-o-y, fr\)cu\*
MCS-1865 and MCS-1866 do not contain polychlorinated biphenyl (PCB). Both MCS-1865 and MCS-1866 are synthetic hydro-
a
carbons combined with trichloro^benzene to give the desired viscosity level.
Standard Disclaimer Clause (boxed) *Fire Resistance Disclaimer (boxed)
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Technical data on typical laboratory samples are given below. Additional studies are underway to develop further data. Samples are available for preliminary evaluation.
TYPICAL DATA*
ELECTRICAL PROPERTIES
Dielectric Strength (ASTM D877) 25C, 0.1 inch gap
Impulse Strength
Power Factor, 100C, 60 Hz (ASTM D924)
Dielectric Constant, 100C, 60 Hz (ASTM D924)
Gassing Tendency (ASTM D2298)
MCS-1865
MCS-1866
>50 KV
42.1 KV
>120, <160 KV
0.11%
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0.01%
2.56
2.74
9.5 ml/min. 41.2, 31.7 ml/mi0-
FIRE RELATED PROPERTIES Flash Point (ASTM D92) Fire Point (ASTM D92) Auto Ignition Temp., (ASTM D2155) Oxygen Index
315F (157C)
None to b.p. (390FC200c) ) 750F(399C)
18.3
310F (154C)
None to b.p. (390F [200c] ) 800F(427C)
17.1
PHYSICAL PROPERTIES
Specific Gravity -30C
-15C 0C
25C 50C 100C 150C
1.027 1.016 1.005 0.987 0.970 0.933 0.895
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1.088 1.076 1.065 1.045 1.026 0.988 0.948
*This data is based upon samples tested in the laboratory and is not guaranteed for all samples.
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Coefficient of Exp., ml/ml,C
Viscosity, @ -40C -30C -15C 0C 25C 50C 100C 150C
cs.
pour Point (ASTM D97)
Temperature C at which Vapor Pressure is:
1 Torr 10 Torr 100 Torr 760 Torr
Specific Heat, BTU/lb. @ 25F 50F 100F 150F
Thermal Conductivity BTU/ft., hr. @ 25F 50F 100F 150F
MCS-1865 0.000750
MCS-1866 0.000761
3
19,620 5,119 1,040 306 69. 5 24.4 6.44 2.88
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1830 426 140 37 14 4 2
-50F(-45C) -50F(-45C)
58 104 169 248
0.412 0.430 0.466 0.501
49 96 161 240
0.390 0.406 0.438 0.470
0.0785 0.0771 0.0744 0.0716
0.0744 0.0729 0.0702 0.0675
MATERIALS COMPATIBILITY Extensive compatibility testing has not been completed. How
ever, it is expected that those materials which are used with askarel transformer fluids will also be compatible with MCS-1865 and MCS-1866. It is recommended that compatibility tests be con ducted between the fluids and samples of the specific material to be used under conditions simulative of actual use. A good procedure for such testing is ASTM 3255, Method for Investigating the
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TOWOLDMON0043811
Compatibilitv of Transformer Insulation and Construction Materials in Askarels.
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