ImageVerifierCode 换一换
格式:PDF , 页数:2 ,大小:46.33KB ,
资源ID:513467      下载积分:10000 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
注意:如需开发票,请勿充值!
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【http://www.mydoc123.com/d-513467.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(ASTM D2759-2000(2005) Standard Practice for Sampling Gas from a Transformer Under Positive Pressure《在正压力下从变压器中抽取气体样品的标准实施规程》.pdf)为本站会员(jobexamine331)主动上传,麦多课文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

ASTM D2759-2000(2005) Standard Practice for Sampling Gas from a Transformer Under Positive Pressure《在正压力下从变压器中抽取气体样品的标准实施规程》.pdf

1、Designation: D 2759 00 (Reapproved 2005)Standard Practice forSampling Gas from a Transformer Under Positive Pressure1This standard is issued under the fixed designation D 2759; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye

2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers the sampling of gas above theinsulating liquid of a transformer. A gas sampling bottlecoll

3、ects the gas sample from the gas space that is at a positivepressure.1.2 Representative samples of gas are taken for analysis todetermine their compositions.1.3 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.4 This standard d

4、oes not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility 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. Significance and Use2.1 A gas s

5、ample from above the insulating liquid intransformers and other electrical power apparatus can be usedto give an early indication of developing fault conditions.Combustible gases are formed from the breakdown of theinsulating materials under thermal and electrical stress. Exces-sive concentrations o

6、f combustible gases indicate the need totake appropriate action.2.2 It is important that gas samples from equipment be takenfrom the gas space directly above the liquid level, and not fromremote expansion compartments, such as tank bracing bands.2.3 The procedure described should be carefully follow

7、ed toensure that the sample is not diluted by air or nitrogen, orcontaminated by residual materials in the sampling bottle.3. Apparatus3.1 Gas Sampling Bottlestainless steel, Monel metal, orglass, of at least 250-cm3capacity, with a valve and a hoseconnector on each end.3.1.1 The gas sampling bottle

8、 must be free of dirt, moisture,oil, or other contaminants. It should be cleaned by washingwith anhydrous isopropyl alcohol, or other suitable cleaningagent that is free from residue upon evaporation. The bottleshould then be dried by blowing out with dry air or nitrogen,oven baking, or be dried und

9、er vacuum.3.2 Plastic BagThe bag should have only one openingarranged to fit over one of the hose connectors on the samplingbottle. The plastic bag should have a volume, when fullyexpanded, of approximately 15 times the volume of thesampling bottle.4. Procedure4.1 Before connecting the sampling bott

10、le to the trans-former, purge the outlet valve on the transformer by exhaustinga small amount of gas to remove any moisture, oil, or othercontaminants.4.2 Attach one end of the gas sampling bottle by plastichose to the transformer outlet valve, and the other end of thesampling bottle to the plastic

11、bag, making sure that a leakproofconnection is obtained.4.3 Purge the sampling bottle and hose of air by firstopening both valves of the sampling bottle and then slightlyopening the outlet valve on the transformer. As the gas flowsthrough the sampling bottle, the plastic bag will expand.4.4 When the

12、 bag has expanded to its full volume, first closethe valve adjacent to the bag; then close the valve at the otherend of the sampling bottle; and, finally, close the transformergas outlet valve. Remove the hose and plastic bag from thesampling bottle.5. Marking5.1 Attach a tag to the gas sampling bot

13、tle showing thefollowing:5.1.1 Serial number of transformer,5.1.2 Date of sample,5.1.3 Transformer oil temperature, and5.1.4 Location of transformer.6. Precision and Bias6.1 This is a sampling method, and as such precision andbias do not apply.7. Keywords7.1 gas; positive pressure; sampling gas; tra

14、nsformer1This practice is under the jurisdiction of ASTM Committee D27 on ElectricalInsulating Liquids and Gases and is the direct responsibility of SubcommitteeD27.07 on Physical Test.Current edition approved Oct. 1, 2005. Published November 2005. Originallyapproved in 1968. Last previous edition a

15、pproved in 2000 as D 2759 00.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of t

16、his standard are expressly 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 y

17、ears andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical comm

18、ittee, which you may attend. 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. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 2759 00 (2005)2

copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
备案/许可证编号:苏ICP备17064731号-1