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
