TB/T 3189-2007Specification of railway signal axle counter application system (English PDF)

Foreword

TB/T 3396 Test Methods for Fastening Systems of High-Speed Railway consists of the

following 7 parts:

--- Part 1: Determination of Longitudinal Rail Restraint;

--- Part 2: Determination for Clamping Force;

--- Part 3: Determination of Static Stiffness for Fastening Assembly;

--- Part 4: Test of Fatigue Performance of Fastening Assembly;

--- Part 5: Determination of Electrical Resistance;

--- Part 6: Effect of Severe Environmental Conditions;

--- Part 7: Vertical Load Test for Cast-in Fastening Components.

This Part is Part 5 of TB/T 3396.

This Part was drafted as per the rules specified in GB/T 1.1-2009.

This Part shall be under the jurisdiction of Institute of Standards and Metrology, China

Academy of Railway Sciences.

Drafting organizations of this Part: Railway Engineering Research Institute, China Academy of

Railway Sciences.

Chief drafting staffs of this Part: Zhao Rukang, Xiao Junheng, Fang Hangwei, Xu Shaohui, and

Li Zirui.

Test Methods for Fastening Systems of High-Speed

Railway – Part 5: Determination of Electrical Resistance

1 Scope

This Part specifies the indoor test method for the insulation electric resistance of fastener

assembly.

This Part applies to fastening systems for high-speed railway.

2 Normative Reference

The following documents are essential to the application of this Document. For the dated

documents, only the versions with the dates indicated are applicable to this Document; for the

undated documents, only the latest version (including all the amendments) is applicable to this

Document.

GB/T 6908 Analysis of water used in boil and cooling system - Determination of electrical

conductivity

3 Sign

The following signs are applicable to this Document.

Kgamma: correction factor for conductivity of test water;

Rgamma: the measured electric resistance, in ohm;

R33: the value of electric resistance when the conductivity of water is corrected into 33mS/m,

in ohm;

gamma: conductivity of the used water at 25°C, in mS/m.

4 Principle

Measure the value of electric resistance between two short rails fixed on the sleeper with

fasteners under the water spraying condition of the specified water spraying rate. The

conductivity of water is corrected by the coefficient Kgamma.

5 Test Equipment

6 Test Pieces

7 Test Procedure

Test the conductivity and temperature of the test water according to the provisions of GB/T

6908 for testing and calculation; and correct the conductivity of the test water to the value gamma at

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