CENELEC
Project
| Reference | EN 60567:2005 |
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| Title | Oil-filled electrical equipment - Sampling of gases and of oil for analysis of free and dissolved gases - Guidance |
| Project Number | 16188 |
| Abstract/Scope | Deals with the techniques for sampling free gases from gas-collecting relays and for sampling oil from oil-filled equipment such as power and instrument transformers, reactors, bushings, oil-filled cables and oil-filled tank-type capacitors. Three methods of sampling free gases and three methods of sampling oil are described; the choice between the methods often depends on the apparatus available and on the quantity of oil needed for analysis. Before analysing the gases dissolved in oil, they must first be extracted from the oil. Three basic methods are described, one using extraction by vacuum (Toepler and partial degassing), another by displacement of the dissolved gases by bubbling the carrier gas through the oil sample (stripping), and the last one by partition of gases between the oil sample and a small volume of the carrier gas (head space). The gases are analysed quantitatively after extraction by gas chromatography; a method of analysis is described. Free gases from gas-collecting relays are analysed without preliminary treatment. The preferred method for assuring the performance of the gas extraction and analysis equipment, considered together as a single system, is to degas samples of oil prepared in the laboratory and containing known concentrations of gases (gas-in-oil standards) and quantitatively analyse the gases extracted. Two methods of preparing gas-in-oil standards are described. For daily calibration checks of the chromatograph, it is convenient to use a standard gas mixture containing a suitable known amount of each of the gas components to be in a similar ratio to the commons ratios of the gases extracted from transformer oils. The techniques described take account, on the one hand, of the problems peculiar to analyses associated with acceptance testing in the factory, where gas contents of oil are generally very low and, on the other hand, of the problems imposed by monitoring equipment in the field, where transport of samples may be by un-pre |
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Published
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Status
| Current Stage code | 6060 |
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| Current Stage code date | 2005-10-14 |
| Current Stage code deadline | 2006-06-01 |
| Deadline date for vote |
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Details
| IEC Technical Body | IEC/TC 10 |
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| Reference Document | IEC 60567:2005 (EQV) |
| ICS | 17.220.99 - Other standards related to electricity and magnetism 29.035.99 - Other insulating materials 29.040.10 - Insulating oils |
| Keywords | Oil; Gas; Sampling; Free gas; Dissolved gas |
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Environment
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Product Life Cycle
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Information
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History
Implementation Dates
| date of Ratification (DOR) (1) | 2005-09-01 |
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| date of Availability (DAV) (2) | 2005-10-14 |
| date of Announcement (DOA) (3) | 2005-12-01 |
| date of Publication (DOP) (4) | 2006-06-01 |
| date of Withdrawal (DOW) (5) | 2008-09-01 |
Relations
| Supersedes | EN 60567:1992 |
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| Superseded by | EN 60567:2011 |
| Normative reference (6) | ISO 5725-1:1994 EN ISO/IEC 17025:2005 EN 60296:2004 corr. September 2004 EN 60599:1999 |
(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved
(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat
(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level
(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement
(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn
(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.
