Standard No.:	JB/T 7065-2015
English Name:	Pressure Relief Devices for Transformers
Chinese Name:	变压器用压力释放阀
Professional Classification:	JB    Professional Standard - Machinery
Issued by:	Ministry of Industry and Information Technology
Issued on:	2015-10-10
Implemented on:	2016-3-1
Status:	valid
Superseding:	JB/T 7065-2004 Pressure Relief Devices for Transformers JB/T 7069-2004 Test guide for pressure relief devices for transformers
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	140.0
Delivery:	via email in 1 business day

1 Scope This standard specifies terms and definitions, structural type, product model, product specification and installation dimension, technical requirements, test items and test requirements as well as marking, packaging, transportation, storage and ex-factory documents of pressure relief device. It applies to pressure relief devices (hereinafter referred to as relief device) which are installed on oil-immersed transformers (including mutual inductors, reactors and tap switch, etc.). 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 191 Packaging - Pictorial marking for handling of goods GB/T 531.1 Rubber vulcanized or thermoplastic - Determination of indentation hardness - Part 1: Durometer method (Shore hardness) GB/T 531.2 Rubber vulcanized or thermoplastic - Determination of indentation hardness - Part 2: IRHD pocket meter method GB 1094.1 Power transformers - Part 1: General GB/T 1690 Rubber, vulcanized or thermoplastic - Determination of the effect of liquids GB/T 2423.4 Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat, cyclic (12h+12h cycle) GB/T 2423.16 Environmental testing for electric and electronic products - Part 2: Test methods - Test J and guidance: Mold growth GB/T 2423.17 Environmental testing for electric and electronic products - Part 2: Test methods - Test Ka: Salt mist GB/T 2900.95 Electrotechnical terminology - Transformers, voltage regulators and reactors GB 4208 Degrees of protection provided by enclosure (IP code) JB/T 3837 Identification method of transformers product type JB/T 8448.1 Technical specifications of sealing articles for transformer and similar products - Part 1: Rubber sealing articles JB/T 8448.2 Technical specifications of sealing articles for transformer and similar products - Part 2: Corkrubber sealing articles 3 Terms and definitions

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Structural style, product model, product specification and installation dimension 4.1 Structural type 4.2 Product model 4.3 Product specification 4.4 Installation dimension 5 Technical requirements 5.1 Performance parameters 5.2 Application conditions 5.3 Actuation performance 5.4 Sealing performance 5.5 Displacement performance 5.6 Actuation reliability (500 times) 5.7 Signal switch contact capacity 5.8 Insulation performance of signal switch 5.9 Oil and aging resistance of sealing ring 5.10 Appearance requirements 5.11 Protection provided by enclosure 5.12 Moisture resistance, salt mist resistance and anti-molds requirements 5.13 Anti-vibration ability 6 Test items and test requirements 6.1 Test items 6.2 Test requirements 7 Marking, packaging, transportation, storage and ex-factory documents Table 1 Product specification Table 2 Installation dimension Table 3 Performance parameters Table 4 Signal switch contact capacity Table 5 Volume of the test tank for operating pressure Table 6 Volume of the test tank for closing pressure