1、Designation: D5282 05 (Reapproved 2012)Standard Test Methods forCompatibility of Construction Material with Silicone FluidUsed for Electrical Insulation1This standard is issued under the fixed designation D5282; the number immediately following the designation indicates the year oforiginal adoption
2、or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 These test methods cover screening for the compatibilityof construction mater
3、ials with silicone fluid for use in electricalequipment.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety problems, if any, associated with its use. It is therespo
4、nsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD445 Test Method for Ki
5、nematic Viscosity of Transparentand Opaque Liquids (and Calculation of Dynamic Viscos-ity)D664 Test Method for Acid Number of Petroleum Productsby Potentiometric TitrationD828 Test Method for Tensile Properties of Paper andPaperboard Using Constant-Rate-of-Elongation Appara-tus3D877 Test Method for
6、Dielectric Breakdown Voltage ofInsulating Liquids Using Disk ElectrodesD924 Test Method for Dissipation Factor (or Power Factor)and Relative Permittivity (Dielectric Constant) of Electri-cal Insulating LiquidsD974 Test Method for Acid and Base Number by Color-Indicator TitrationD1169 Test Method for
7、 Specific Resistance (Resistivity) ofElectrical Insulating LiquidsD1933 Specification for Nitrogen Gas as an ElectricalInsulating MaterialD2129 Test Method for Color of Clear ElectricalInsulatingLiquids (Platinum-Cobalt Scale)D2225 Test Methods for Silicone Fluids Used for ElectricalInsulationD2413
8、Practice for Preparation of Insulating Paper andBoard Impregnated with a Liquid DielectricD3612 Test Method for Analysis of Gases Dissolved inElectrical Insulating Oil by Gas ChromatographyD4243 Test Method for Measurement ofAverage Viscomet-ric Degree of Polymerization of New and Aged ElectricalPap
9、ers and BoardsD4559 Test Method for Volatile Matter in Silicone FluidD4652 Specification for Silicone Fluid Used for ElectricalInsulationD5837 Test Method for Furanic Compounds in ElectricalInsulating Liquids by High-Performance Liquid Chroma-tography (HPLC)3. Significance and Use3.1 The magnitude o
10、f the changes in the electrical propertiesof the silicone fluid is of importance in determining thecontamination of the fluid by the test specimen.3.2 Physical and chemical changes in the fluid, such as colorand acidity, also indicate solubility or other adverse effects ofthe test specimen on the fl
11、uid.3.3 Physical changes of the test specimen, such as hardness,swelling, and discoloration, show the effect of the fluid on thetest specimen and are used to determine the suitability of thematerial for use in silicone fluid.3.4 A material meeting the criteria recommended does notnecessarily indicat
12、e suitability for use in electrical equipment.Other properties must also be considered. Additionally, certainmaterials containing additives may meet the requirements ofthese test methods yet be unsatisfactory when subjected tolonger-term evaluations.3.5 These test methods may be used as a guide for
13、testingthe compatibility of materials for silicone fluids other than 50cSt poly-dimethyl siloxane fluid, but different criteria forjudgment may be necessary.1These test methods are under the jurisdiction of ASTM Committee D27 onElectrical Insulating Liquids and Gases and are the direct responsibilit
14、y ofSubcommittee D27.06 on Chemical Test.Current edition approved Feb. 1, 2012. Published February 2012. Originallyapproved in 1992. Last previous edition approved in 2005 as D5282 05. DOI:10.1520/D5282-05R12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custom
15、er Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO
16、Box C700, West Conshohocken, PA 19428-2959, United States.4. Apparatus4.1 Sample-Handling Apparatus:4.1.1 Oven, forced draft, adjustable to 120 6 1C, and adrying oven, adjustable to 105 6 5C.4.1.2 Glass Containers, 1-L, fitted with glass or aluminumfoil covers (Note 1).NOTE 1Other materials have bee
17、n found to be suitable as covers.4.1.3 Fritted Glass Dispersion Tube (coarse).4.2 Sample-Testing Apparatus:4.2.1 Tensile StrengthAs specified in appropriate testmethod.4.2.2 HardnessAs specified in appropriate test method.4.2.3 Dimensional ChangeMicrometer and caliper.4.2.4 Weight ChangeAnalytical b
18、alance.5. Reagents5.1 Dry Nitrogen Gas, Meeting the requirements of Speci-fication D1933, Type III with the following exception: the totalhydrocarbon content must by 0.5 ppm. Sometimes referred toas Ultra-High Purity (UHP).5.2 Dimethyl Silicone Fluid (50 CSt), conforming to Speci-fication D4652.6. P
19、reparation of Test Specimen6.1 Test specimen size shall be such that the ratio of surfacearea to liquid volume is four times as large as the ratioencountered in normal use in electrical equipment unless thereis some special reason for using a different ratio (Note 2).Some suggested ratios are as fol
20、lows:6.1.1 If the test specimen can be measured, no less than 52cm2is used with each 800 mL of silicone.6.1.2 If the test specimen is insoluble in silicone fluid andthe surface area cannot be measured, use a test specimen in theamount of 1 % by weight of the silicone.6.1.3 If the material is soluble
21、 in the silicone fluid, use a testspecimen in the amount of 0.5 % by weight of the siliconefluid.6.1.4 When surface areas are employed for solid materialtesting, all sides of the solid material are to be used in thecalculation of surface area as long as that surface is in contactwith the silicone fl
22、uid.6.1.5 Varnishes and materials used as dip coatings, andpaints shall be cured on aluminum foil or paper known to becompatible with the silicone fluid. They should be tested at aratio of 14 g or approximately 1300 cm2of surface area per 800mL of silicone fluid.6.1.6 Core steel and core-steel coati
23、ngs shall be tested at aratio of 3100 cm2for each 400 mL of silicone fluid fortransformer applications. A realistic core steel ratio for regu-lators is 5000 cm2of surface area per each 400 mL of siliconefluid.6.1.7 Gasket materials shall be tested at a ratio of 13 cm2ofsurface area per 800 mL of sil
24、icone fluid.6.1.8 Wire enamels shall be tested at a ratio of 1300 cm2ofsurface area per 800 mL of silicone fluid.6.1.9 Cellulosic insulation shall be tested at a ratio 2000 cm2of surface area per 800 mL of silicone fluid. These testspecimens shall be prepared according to the instructionsprovided in
25、 Practice D2413.6.2 Caution must be taken in obtaining and preparing thesample to ensure that it is a representative sample of thematerial as supplied by the manufacturer. Use forceps to handlethe test specimens or adequately protect them from contami-nation such as skin oils during handling.6.3 Pre
26、-dry all solid materials for 16 h in an oven at 105 65C. Gasket materials shall not be pre-dried and cellulosicinsulation does not require any further drying as long as it isprepared according to 6.1.9.6.4 Remove the test specimen from the oven and place in a1-L jar with 800 mL of silicone fluid. Bu
27、bble the silicone fluidwith dry nitrogen for approximately 10 min through a frittedglass tube. To minimize contamination, slide the cover onquickly while removing the aluminum foil and the bubble tube.Fasten the cover tightly.NOTE 2There are certain materials in electrical apparatus for whichthe sug
28、gested ratios of material to liquid are impractical; when thiscondition exists, report the ratio.6.5 Prepare a reference silicone fluid specimen (control) foreach group of specimens tested, as directed in 6.4. A referencespecimen consists of the silicone fluid only.7. Conditioning7.1 Place the cover
29、ed glass jars in an oven at 1206 1C for168 h.7.2 Remove the jars from the oven and cool to roomtemperature.8. Procedure8.1 With a pair of clean tongs or forceps, remove the testspecimen from the fluid, observe the condition, and conductany desired test on the material.8.1.1 Typical tests on material
30、s can include swelling ordimensional changes, weight changes, hardness, discoloration,brittleness, tensile strength (Test Method D828), degree ofpolymerization (Test Method D4243), etc.8.1.2 For comparative tests, use the appropriate method.8.2 The following tests, as modified in Test Method D2225,a
31、re suggested for the properties listed below:8.2.1 Fire PointTest Method D92.8.2.2 ViscosityTest Method D445.8.2.3 Neutralization NumberTest Methods D664 orD974.8.2.4 Dielectric StrengthTest Method D877.8.2.5 Dissipation Factor (Power Factor at 25 and 100C)Test Method D924.8.2.6 ColorTest Method D21
32、29.8.2.7 Resistivity Test Method D1169.8.2.8 Percent VolatilesTest Method D4559.8.2.9 Furanic Compounds (perform when testing cellulosicmaterials)Test Method D5837.8.2.10 Dissolved Gases-in-Silicone (optional)TestMethod D3612.D5282 05 (2012)29. Evaluation of Results9.1 Evaluation of Physical Changes
33、 of the Material at RoomTemperatureThe changes in physical properties of the ma-terial being tested must be considered on the basis of thespecific needs of the application. For example, paper insulationtested may be submitted for degree of polymerization analysis(Test Method D4243) or tensile streng
34、th (Test Method D828).9.2 Evaluation of Test Results on Silicone Fluid:9.2.1 The test results obtained on the liquids containing thetest specimens of construction material must be compared withthose of the reference liquid sample to determine any variation.9.2.2 The absence of any differences betwee
35、n the testspecimen fluid and the reference fluid indicates that the testspecimen fluid was not affected by the material and that thematerial is worthy of further consideration or testing, or both.9.2.3 Asignificant difference in any of the results, as definedin 9.2.5, may indicate some compatibility
36、 problem, and thematerial should be either further reviewed or rejected.9.2.3.1 The amount of change between the reference fluidand the test specimen fluid that is considered to be significantshould be established prior to testing by agreement between thepurchaser and the seller.9.2.4 If the aged co
37、ntrol fluid reference fails to meet thecriteria in 9.2.5, the liquid itself is suspect for one or more ofthe following reasons:9.2.4.1 The fluid does not meet the requirements for ap-proved silicone.9.2.4.2 The fluid has become contaminated.9.2.4.3 The test aging temperature exceeded the prescribedl
38、imit (see 7.1).9.2.5 The aged properties for the control 50 cSt dimethylsilicone fluid specimen should be as follows:Fire point 340C, minViscosity 47.5 to 52.5 cStNeutralization number 0.04, maxDielectric strength 38 kV, minDissipation factor (Power factor), 100C 0.35 %, maxColor 100, maxResistivity
39、, 100C 10 3 1012,minPercent volatiles 0.5 %, maxCondition of silicone clearCondition of material unchanged10. Report10.1 Report the following information:10.1.1 The results of the tests specified in 9.2.5, on both thereference silicone specimen and the test specimen silicone,10.1.2 Any changes in ap
40、pearance, dimensions, hardness orother relevant properties of the construction material testspecimens, and10.1.3 Whether the construction material evaluated by thistest method appears to be compatible (or incompatible) withsilicone fluid.11. Precision and Bias11.1 No practical means exists to specif
41、y precision and bias,as this method is used to test materials which may agedifferently in the presence of silicone fluid.11.2 Refer to the precision and bias statements for each ofthe individual test methods used for comparative tests in 8.1.2and the suggested tests in 8.2.12. Keywords12.1 compatibi
42、lity; construction material; electrical equip-ment; electrical insulating liquid; poly-dimethyl siloxane; sili-cone fluidASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expres
43、sly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,
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45、tend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States.
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