Standard No.:	GB/T 25338.2-2019
English Name:	Switch machines for railways—Part 2:Test methods
Chinese Name:	铁路道岔转辙机 第2部分：试验方法
Chinese Classification:	S61    Signal equipment
Professional Classification:	GB    National Standard
Issued by:	SAMR and SAC
Issued on:	2019-08-30
Implemented on:	2020-3-1
Status:	valid
Superseding:	GB/T 25338.2-2010 Switch machine for railway—Part 2:Test methods
Language:	English
File Format:	PDF
Word Count:	7500 words
Price(USD):	225.0
Delivery:	via email in 1 business day

Switch machines for railways - Part 2: Test methods 1 Scope This part of GB/T 25338 specifies the terms, test conditions and general test methods for electric switch machine, electro-hydraulic switch machine and electro-pneumatic switch machine (hereinafter referred to as "switch machine"). This part applies to the tests of electric switch machine, electro-hydraulic switch machine and electro-pneumatic switch machine. 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 2408-2008 Plastics - Determination of burning characteristics - Horizontal and vertical test (IEC 60695-11-10: 1999, IDT) GB/T 2423.1-2008 Environmental testing for electric and electronic products - Part 2: Test methods - Tests A: Cold (IEC 60068-2-1: 2007, IDT) GB/T 2423.2-2008 Environmental testing for electric and electronic products - Part 2: Test methods - Test B: Dry heat (IEC 60068-2-2: 2007, IDT) GB/T 2423.4-2008 Environmental testing for electric and electronic products - Part 2: Test methods - Test Db: Damp heat, cyclic (12h+12h cycle) (IEC 60068-2-30: 2005, IDT) GB/T 2423.16-2008 Environmental testing for electric and electronic products - Part 2: Test methods - Test J and guidance: Mold growth (IEC 60068-2-10:2005, IDT) GB/T 2423.17-2008 Environmental testing for electric and electronic products - Part 2: Test methods - Test Ka: Salt mist (IEC 60068-2-11:1981, 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 Machined (IP Code) - Classification (IEC 60034-5:2000, IDT) GB/T 5171.21-2016 Small power motors - Part 21: General test methods GB/T 25338.1-2019 Switch machines for railways - Part 1: General specification 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 electrical character operating current and switching time of the switch machine under the rated throwing force, rated voltage or power supply voltage (AC) and the single-line resistance specified; switching time of the electro-pneumatic switch machine under the rated throwing force, rated wind pressure and control voltage. 3.2 control voltage voltage across the solenoid valve coil of the electro-pneumatic switch machine 3.3 rated wind pressure calibrated design wind pressure value of the electro-pneumatic switch machine when in normal operation 3.4 single-line resistance resistance of a single line on the transmission path from the power supply to the motor end of the switch machine 4 Test conditions 4.1 Standard atmospheric conditions for tests The tests specified in this part (unless otherwise specified) are carried out under standard test atmospheric conditions as follows:

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Test conditions 5 General test methods 6 Test of switch machine