Switch machines for railways - Part 1: General specification
1 Scope
This part of GB/T 25338 specifies the terms, classification, technical requirements, inspection rules, marking, packaging, transportation and storage of electric, electro-hydraulic and electro-pneumatic switch machines for railway turnouts [hereinafter referred to as "switch machine(s)"].
This part is applicable to the design, manufacturing and inspection of switch machines.
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 (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods (GB/T 191-2008, ISO 780:1997, MOD)
GB/T 755-2008 Quota and performance of rotating electrical machines (IEC 60034-1:2004, IDT)
GB/T 2408-2008 Plastics - Determination of burning characteristics - Horizontal and vertical test (IEC 60695-11-10:1999, IDT)
GB/T 2423.16-2008 Environmental testing for electrical and electronic products - Part 2: Test methods, Test J and guidelines: Mould growth (IEC 600682-10:2005, IDT)
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 (ISO 2859-1:1999, IDT)
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code) (IEC 60529:2013, IDT)
GB/T 4942.1-2006 Degrees of protection provided by the integral design of rotating electrical machines (IP code) - Classification (IEC 60034-5:2000, IDT)
GB/T 5171.1-2014 Small power motors - Part 1: General technical requirements
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3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
locking
action of locking the switch bar or detecting bar of switch machine at the terminal position through mechanism
3.2
external locking equipment
mechanical equipment that switches rails with a switch machine and directly locks the switch rail with the stock rail, and the point rail with the wing rail
3.3
detector of trailing movement
bar in a switch machine that can check the state of turnout
Note: The bar can disconnect the detecting contact of switch machine in the railing movement.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Technical requirements
6 Test rules
7 Marking, packaging, transportation and storage
