Standard No.:	GB/T 14542-2017
English Name:	Guide for maintenance and supervision of transformer oil
Chinese Name:	变压器油维护管理导则
Chinese Classification:	F24    Electric power testing technique
Professional Classification:	GB    National Standard
Issued by:	MOHURD and AQSIQ
Issued on:	2017-05-12
Implemented on:	2017-12-1
Status:	valid
Superseding:	GB/T 14542-2005 Guide for maintenance and supervision of transformer oil in service
Language:	English
File Format:	PDF
Word Count:	10500 words
Price(USD):	260.0
Delivery:	via email in 1 business day

1 Scope This standard gives principles for maintenance and supervision of transformer oil. This standard is applicable to mineral insulating oils used in oil-filled electrical equipment such as power transformers, reactors, instrument transformers, and oil-filled bushings. This standard does not apply to synthetic insulating liquids. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 261 Determination of flash point—Pensky-Martens closed cup method GB 264 Petroleum products—Determination of acid number GB/T 507 Insulating liquids—Determination of the breakdown voltage at power frequency GB 2536 Fluids for electrotechnical applications—Unused mineral insulating oils for transformers and switchgear GB/T 5654 Insulating liquids—Measurement of relative permittivity, dielectric dissipation factor (tanδ) and d.c. resistivity GB/T 6540 Petroleum products—Determination of color GB/T 6541 Petroleum products—Mineral oils—Determination of interfacial tension of oil against water—Ring method GB/T 7595 Quality of transformer oils in service GB/T 7597 Method of sampling for transformer and turbine oils in electric power industry GB/T 7598 Determination of water-soluble acid in transformer oils in service GB/T 7600 Determination of water content in transformer oils and turbine oils in service by coulometric method GB/T 8926-2012 Standard test method for insolubles in used lubricating oils GB 50150 Standard for hand-over test of electric equipment electric equipment installation engineering DL/T 285 Determination of corrosive sulfur in mineral insulating oils—Insulated copper flat wire method DL/T 385 Determination of electrification tendency of transformer oil DL/T 419 Power oil terminology DL/T 421 Determination of oil volume resistivity of power oil DL/T 429.6 Open cup aging test for power oils DL/T 429.7 Determination of sludge by precipitation DL/T 432 Determination of particulate contamination in power oils DL/T 596 Preventive test procedures for power equipment DL/T 703 Determination of gas content in insulating oil by gas chromatography DL/T 722 Guideline for the analysis and determination of dissolved gases in transformer oil DL/T 1096 Particle size limit in transformer oil DL/T 1355 Determination of furfural content in transformer oil—Liquid chromatography DL/T 1419 Guideline for reclamation and use of transformer oil DL/T 1459 Determination of the content of metal passivator in mineral insulating oils—High performance liquid chromatography DL/T 1552 Guideline for storage management of transformer oil NB/SH/T 0810 Determination of gassing characteristic of insulating liquid under electric field and ionization effect NB/SH/T 0812 Determination of 2-furfural and related components in mineral insulating oil SH/T 0802 Determination of 2,6-bi-tert-butyl-paracresol in insulating oils IEC 60422 Mineral insulating oils in electrical equipment—Supervision and maintenance guidance IEC 62697-1 Test methods for quantitative determination of corrosive sulfur compounds in unused and used insulating liquids—Part 1: Test method for quantitative determination of dibenzyl disulfide (DBDS) 3 Terms and definitions For the purposes of this document, the terms and definitions given in DL/T 419 and the following apply. 3.1 mineral insulating oil refined insulating oil from natural petroleum [Definition 3.9 in DL/T 419-2015] 3.2 reconditioning process that reduces the content of impurities such as gases, water, and solid particles in used oil products to an acceptable level by physical processing

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Sampling 5 Acceptance of new transformer oil 6 Inspection of in-service transformer oil 7 Oil compatibility (mixed oil) 8 Maintenance of in-service transformer oil 9 Transformer sludge flushing 10 Storage and transportation of oil 11 Technical files and information of equipment 12 Safety and health Annex A (Informative) Measures to prevent transformer oil deterioration Annex B (Informative) Common materials for oil aging prevention and oil processing methods