1、Code of practice for the safe use of fully enclosed oil-filled electrical equipment which may be contaminated with PCBs The European Sandard EN 60225 : 1996 has the status of a British Standad ICs 29.180 3s EN i0225 : 1997 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BS
2、I BS EN 50225-ENGL 1797 W 1bZllbbq b33bLiB 25Y BS EN 50225 : 1997 Amd. No. Committees responsible for this British Standard Date Text affected The preparation of this British Standard was entrusted to Technical Committee PEIJ14, Power transformers, upon which the following bodies were represented As
3、sociation of Consuiting Engineem British Cable Makers Confederation British Pump Manufacturem Association British Railways Board ElectriciQ Association Institution of Plant Engineem ilanshion and Distribution Association (BEAMA Limited) This British Standard, having been prepared under the direction
4、 of the Electrotechnicd Sector Board, was published under the authority of the Standards Board and comes into effect on 15 May 1997 O BSI 1997 The following BSI references relate to the work on this standard Committee reference PEU14 Draft for comment 94208972 DC ISBN O 680 27404 7 STD-BSI BS EN 502
5、25-ENGL 1777 = Lb24bbS Ob33bLi9 170 BS EN 60226 : 1997 Contents Committees responsible Nationai foreword page inside front cover 11 O BSI 1997 Foreword Text of EN 50225 2 3 i STD-BSI BS EN 50225-ENGL 1777 Lb24bb7 Ob33b50 902 W BS EN 60225 : 1997 National foreword This British standard has been prepa
6、red by Technical Committee PEIJl4, and is the English ianguage version of EN 50225 : 1996, Code of practice for the safe use offuuy enclosed oil-filled electrical equipment which may be contaminated with PCBs, published by the European Committee for Eleckotechnid Standadhation (CENELEC). Compliance
7、with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 10, an inside back cover and a back cover. ii O ES1 1997 EUROPEAN STANDARD NO= EUR0PEE”E EUROP- NORM EN 50225 D
8、ecember 1996 ICs 29.180 Descriptors: Electrical equipment, liquid electrical insulating materials, insulating oils, askarel, polychiorobiphenyl, contamination, environmental protection, warning notices, accident prevention, safety, safety measures, labelling, hazards, defects, accidents, fire, first
9、 aid, hygiene English vemion Code of practice for the safe use of fully enclosed oil-Ued electrical equipment which may be contaminated with PCBS Code pour ia scurit demploi des matriels lectriques mplis dhuile qui peuvent tre contamins par les PCB Leitlinie fr die prswris zum sicheren Umgang mit vo
10、lstnchg gelmpseten, mit FVB kontaminieitem l befullten elektrischen Betriebsmiein This European Standard was approved by CENELEC on 199 b) water courses, e.g. ditches, streams, canals, rivers, lakes, etc.; c) water storage systems, e.g. reservoirs, etc. 3 Identication of insulating liquids The norma
11、l point of identification of insdating liquids is the manufacturers ratingidate. In case of doubt, the originai manufacturer may be consultiid Cases of doubt may arise if there is no rathg-plate or if the contents are unknown. There is no need for measurement of the PCB content where there is a know
12、n histom for example a hown source without contamhation or a record of previous analysis. Insulating liquid may be suspected to be contaminated with PCBs from such evidence as is available, including: - the name of the manufactureq - the year of manufacture; - the type of equipment; or such other in
13、formation indicating that con tamhation may have occurred either during manufacturing, or operation and maintenance of the equipment. If the insulatjng liquid is suspected to be contaminated with PCBs, then the PCB content should be measured: - at the end of the useful life; - before disposal, - aft
14、er an internai failure; - in case of leakage; - before planned replacement of insulating liquid, includmg repair or maintenance involving contact with the insdating liquie - - before transfer of ownership. There is no known risk to human health or to the environment, so long as the equipment remains
15、 fully enclosed, even if the insulahg liquid is contaminated with PCBS. Screening tests are useful for the quick identification of possible contamhation with certain specified levels. More accurate standardized measurement methods may be necessary after a positive screening test. There are a number
16、of laboratories that may be used to analyse insulating iiquids which may be suspected to be contaminated with PCBs. Where the PCB content in oil is measured to be not greater than 50 mg/kg the equipment is considered to be not contaminated with PCBs. Where the PCB content in oil is measured to be gr
17、eater than 50 mg/kg the equipment is considered to be contamhted with PCBs and the equipment should be labelled accorduigly (see clause 6, Labelling). 4 Site design and construction 4.1 General Precautions to prevent pollution of the environment should be taken into account at the design and constmc
18、on stage (see claw 6, Pollution of the environment). For existing sites, these precautions should be implemented where reawnably practicable. When the amount of oil contained in a transformer is loo0 litses or greater, adequate arrangements should be constructed to contain all spillage and prevent a
19、ny waste products from reaching water systems. Bunded areas should not be rendered ineffective by ingress of rain water. 4.2 Mechanical protection Ali oil-filed equipment and areas where spares are stored should be adequately protected against mechanical damage, e.g., by fork lift trucks, etc., if s
20、uch damage is possible. 4.3 Storage Storage areas containing oil should not have drains which could caw pollution of the environment. Spare oil containers and equipment containing oil in storage should be controlled to prevent accidental wwe. O BSI 1997 STD*BSI BS EN 50225-ENGL 1997 1b2qbbS Ob33b55
21、q7i = * rJ3 * 6Labellhg The following should be labelled a) Oil-nued equipment contaminated with PCBS. b) Compounds containing oil-lied equipment contaminated with PCBS. c) Temporary storage areas containing oil-lied equipment, or oii, contaminated with PCBS. d) Containem containing oil contaminated
22、 with PCBS. e) Containes containing waste materiais contaminated with PCBS. The label shoula be indelible, durable and shmd give ad- warning and suitable emergency instrucons. 6 Pollution of the environment 6.1 General Liquid wastes containing oil should not be disposed of into any water systems. Pr
23、ecautions should be taken to avoid any spiiiage or leakage from gaining access to such systems. Adequate buning of all areas containing contaminated oils is of prime importance. There is no known risk to the environment so long as the equipment remains fully enclosed, even if the insulating liquid i
24、s contaminated with PCBS. 6.2 Precautions to be taken to avoid pollution of the environment when working on or handling equipment or containers of insdating liquids In case of leakage or spiliage, the insukithg liquid should be anaysed if it is suspectedto be contaminated with PCBS. Alternatively, t
25、he insulahg liquid may be considered to be contaminated with PCBs without the need for an analysis. if the insulating liquid is either proven or suspected to be contaminated with PCBS, then the following precautions should be taken: a) Spiled oil should not be hosed away into water systems or normal
26、 waste channels. if spillage or leakage is found to have occurred, it should be absorbed using vermiculite, sand, ash, or other inert absorbent material which should be collected and later disposed of in an appropriate manner. b) Any residual oil should be wiped from impewious surfaces using wipes o
27、r rags soaked in a suitable proprietary solvent. These rags should aftemarcis be disposed of in an appropriate manner. Appropa precautions should be taken when handling solvents. c) Contamirdon of other areas by transferring pollution on footwear or protective clothing or tools shoul Farc 0181 996 7
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