GB/T 13397-2024 Technical specification for silver-metaloxide electrical contacts by alloy internal oxidation method
1 Scope
This document specifies the requirements, inspection rules, marking, packaging, transportation and storage of silver metaloxide sheet electrical contacts (hereinafter referred to as "electrical contacts") such as silver-cadmium oxide, silver-zinc oxide and silver-copper oxide manufactured by alloy internal oxidation process (including internal oxidation process and pre-oxidation process), and describes the corresponding testing methods.
This document is applicable to silver metaloxide sheet electrical contacts such as silver-cadmium oxide, silver-zinc oxide and silver-copper oxide manufactured by alloy internal oxidation process, which are mainly used in various low-voltage switching appliances.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 2900.4 Electrotechnical terminology - Special alloys for electrical equipment
GB/T 5586 Test method for essential property of electrical contact materials
GB/T 5587 Basic shapes, dimensions, symbols and notations of silver based electrical contacts
GB/T 26871 Metallographic examination methods of the electrical contact materials
JB/T 7774 (all parts) Test methods for chemical analysis of silver-zinc oxide electric contact material
JB/T 7776 (all parts) Test method for chemical analysis silver-cadmium oxide electric contact material
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 2900.4 apply.
4 Requirements
4.1 Appearance
The surface of the electrical contact product shall be free from cracks, bubbles, missing edges, missing corners, visible depressions and spots. The thickness of the electrical contact product shall not exceed 1mm, and the burr height of the edge shall not exceed 0.03mm. The burr height of the electrical contact product shall not exceed 0.05mm if the thickness of the electrical contact product is greater than 1mm. When the welding surface and working surface of silver-metaloxide electrical contact products are visually indistinguishable, they shall be marked. If there are special requirements, they shall be decided by negotiation between the supplier and the purchaser.
4.2 Dimensional tolerances and notations
The dimensional tolerances and notations of the electrical contacts shall meet the requirements of GB/T 5587, or shall be decided by negotiation between the supplier and the purchaser.
4.3 Chemical composition
The chemical composition of the electrical contact shall meet the requirements of Table 1, or shall be decided by negotiation between the supplier and the purchaser.
Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Requirements 4.1 Appearance 4.2 Dimensional tolerances and notations 4.3 Chemical composition 4.4 Physical and mechanical properties 4.5 Metallographic structure 5 Testing methods 5.1 Appearance 5.2 Dimensions 5.3 Chemical composition 5.4 Physical and mechanical properties 5.5 Metallographic structure 6 Inspection rules 6.1 Batching rules 6.2 End-of-manufacturing provisions 6.3 Inspection items and sequence 6.4 Sampling scheme and judgment rules 7 Marking, packaging and storage 7.1 Marking 7.2 Packaging 7.3 Transportation 7.4 Storage 7.5 Special description Annex A (Informative) Determination of copper content in copper oxide A.1 Principle A.2 Reagent A.3 Preparation and calibration of sodium thiosulfate standard solution A.4 Analytical method Annex B (Normative) Secondary sampling scheme for normal inspection
GB/T 13397-2024 Technical specification for silver-metaloxide electrical contacts by alloy internal oxidation method
1 Scope
This document specifies the requirements, inspection rules, marking, packaging, transportation and storage of silver metaloxide sheet electrical contacts (hereinafter referred to as "electrical contacts") such as silver-cadmium oxide, silver-zinc oxide and silver-copper oxide manufactured by alloy internal oxidation process (including internal oxidation process and pre-oxidation process), and describes the corresponding testing methods.
This document is applicable to silver metaloxide sheet electrical contacts such as silver-cadmium oxide, silver-zinc oxide and silver-copper oxide manufactured by alloy internal oxidation process, which are mainly used in various low-voltage switching appliances.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 2900.4 Electrotechnical terminology - Special alloys for electrical equipment
GB/T 5586 Test method for essential property of electrical contact materials
GB/T 5587 Basic shapes, dimensions, symbols and notations of silver based electrical contacts
GB/T 26871 Metallographic examination methods of the electrical contact materials
JB/T 7774 (all parts) Test methods for chemical analysis of silver-zinc oxide electric contact material
JB/T 7776 (all parts) Test method for chemical analysis silver-cadmium oxide electric contact material
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 2900.4 apply.
4 Requirements
4.1 Appearance
The surface of the electrical contact product shall be free from cracks, bubbles, missing edges, missing corners, visible depressions and spots. The thickness of the electrical contact product shall not exceed 1mm, and the burr height of the edge shall not exceed 0.03mm. The burr height of the electrical contact product shall not exceed 0.05mm if the thickness of the electrical contact product is greater than 1mm. When the welding surface and working surface of silver-metaloxide electrical contact products are visually indistinguishable, they shall be marked. If there are special requirements, they shall be decided by negotiation between the supplier and the purchaser.
4.2 Dimensional tolerances and notations
The dimensional tolerances and notations of the electrical contacts shall meet the requirements of GB/T 5587, or shall be decided by negotiation between the supplier and the purchaser.
4.3 Chemical composition
The chemical composition of the electrical contact shall meet the requirements of Table 1, or shall be decided by negotiation between the supplier and the purchaser.
Contents of GB/T 13397-2024
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
4.1 Appearance
4.2 Dimensional tolerances and notations
4.3 Chemical composition
4.4 Physical and mechanical properties
4.5 Metallographic structure
5 Testing methods
5.1 Appearance
5.2 Dimensions
5.3 Chemical composition
5.4 Physical and mechanical properties
5.5 Metallographic structure
6 Inspection rules
6.1 Batching rules
6.2 End-of-manufacturing provisions
6.3 Inspection items and sequence
6.4 Sampling scheme and judgment rules
7 Marking, packaging and storage
7.1 Marking
7.2 Packaging
7.3 Transportation
7.4 Storage
7.5 Special description
Annex A (Informative) Determination of copper content in copper oxide
A.1 Principle
A.2 Reagent
A.3 Preparation and calibration of sodium thiosulfate standard solution
A.4 Analytical method
Annex B (Normative) Secondary sampling scheme for normal inspection
