TB/T 3539-2018 English PDF (TBT3539-2018)

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TB/T 3539-2018: Equipment for electric point heating system
TB/T 3539-2018
RAILWAY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 45.020
S 61
Equipment for Electric Point Heating System
ISSUED ON: DECEMBER 20, 2018
IMPLEMENTED ON: JULY 01, 2019
Issued by: National Railway Administration
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 6
4 Composition and Model of Snow-Melting Equipment ... 6
5 Technical Requirements ... 7
6 Test Methods ... 17
7 Inspection Rules ... 21
8 Marking, Packaging, Transportation and Storage ... 23
Appendix A (Normative) Snow-Melting Equipment Framework Diagram ... 26
Appendix B (Informative) Configuration of Electric Heating Elements for
Turnout Snow-Melting ... 28
Equipment for Electric Point Heating System
1 Scope
This Standard specifies the technical requirements, test methods, inspection rules,
marking, packaging, transportation and storage of relevant products of equipment for
electric heating turnout snow-melting system (hereinafter referred to as snow-melting
equipment).
This Standard is applicable to the design, manufacture and inspection of electric
heating turnout snow-melting system.
2 Normative References
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) are applicable to this document.
GB/T 191 Packaging - Pictorial Marking for Handling of Goods (GB/T 191-2008,
ISO 780:1997, MOD)
GB/T 2423.17 Environmental Testing for Electric and Electronic Products - Part 2:
Test Method - Test Ka: Salt Mist (GB/T 2423.17-2008, IEC 60068-2-11:1981, IDT)
GB 2894 Safety Signs and Guideline for the Use
GB/T 4208-2017 Degrees of Protection Provided by Enclosure (IP Code) (IEC
60529:2013, IDT)
GB/T 5013.4 Rubber Insulated Cables of Rated Voltages up to and Including
450/750V - Part 4: Cords and Flexible Cables (GB/T 5013.4-2008, IEC 60245-
4:2004, IDT)
GB/T 5169.16-2017 Fire Hazard Testing for Electric and Electronic Products - Part
16: Test Flames - 50 W Horizontal And Vertical Flame Test Methods (IEC 60695-
11-10:2013, IDT)
GB/T 6388 Transport Package Shipping Mark
GB/T 6461-2002 Methods for Corrosion Testing of Metallic and Other Inorganic
Coatings on Metallic Substrates - Rating of Test Specimens and Manufactured
TB/T 3074 Technical Specification for Protection against Lightning
Electromagnetic Impulse on Railway Signaling Equipment
TB/T 3498 Lightning Strike Test method for Railway Communication Signal
Equipment
3 Terms and Definitions
For the purpose of this document, the following terms and definitions apply.
3.1 Equipment for electric point heating
Technology that uses electric heating to melt snow at the turnout switch.
3.2 Electric control cabinet for defrosting the switch
The control equipment that introduces and distributes the snow-melting power supply,
switches on and off the snow-melting heating circuit of each turnout according to the
control conditions.
3.3 Rail temperature sensor
The device that measures the rail temperature.
3.4 Mounting clip
The device that clip and fix the heating elements onto the rail.
3.5 Grip force
Pressure of the mounting clip body on both ends of the rail bottom.
3.6 Clamp pressure
The force that presses the heating elements of strip and lead onto the rail.
3.7 Isolating transformers for defrosting the switch
In order to insulate the heating circuit from the ground, and isolate the different heating
circuits from each other, a transformer connected between the heating power supply
and the heating circuit.
4 Composition and Model of Snow-Melting Equipment
4.1 Composition of snow-melting equipment
requirements.
5.2.2 Snow-melting equipment shall be suitable for centralized and decentralized
power supply.
5.2.3 Snow-melting equipment shall meet the requirements of local control, station
control, and remote control; the system shall have functions such as diagnosis, alarm,
remote monitoring, and management; it can be selected as required.
5.2.4 Snow-melting equipment shall have protection measures against over-current
and short-circuit.
5.2.5 Snow-melting equipment shall have reliable safety protection and flame-
retardant measures; the flame-retardant shall meet the requirements of Level V-2 in
GB/T 5169.16-2017.
5.2.6 The lightning protection devices and components of snow-melting equipment
shall conform to the provisions of TB/T 2311.
5.2.7 Vibration shall meet the following requirements:
a) The electric heating elements, mounting fixtures of electric heating elements, rail
temperature sensor shall meet the requirements of Type-4 vibration test
specified in TB/T 2846-2015. After the vibration test, the equipment shall be free
of damage, no falling off, and can work normally;
b) The isolating transformer, monitoring module and the other devices shall meet
the requirements of Type-2 vibration test specified in TB/T 2846-2015. After the
vibration test, the equipment shall be free of damage, and can work normally.
5.2.8 After the electromagnetic compatibility test, the snow-melting equipment shall
conform to the provisions of performance criterion B specified in GB/T 24338.5.
5.2.9 After the lightning protection test, the snow-melting equipment shall conform to
the provisions of Type-B judgment conditions specified in TB/T 3498.
5.2.10 In the section with track circuit, isolation measures shall be adopted for heating
circuits directly connected to electric heating elements. If an isolating transformer is
used for isolation, the heating circuits on both sides of the turnout shall not share the
same secondary coil of the transformer; neither shall it affect the working status of the
track circuit.
5.2.11 The reliability and life of the snow-melting equipment shall meet the following
requirements:
a) Mean time between failures (MTBF) is greater than or equal to 5×104h;
5.4.3 The control cabinet, control terminal and work station shall have the functions of
setting relevant parameters, starting and closing the system or a single heating circuit.
5.4.4 The control terminal and workstation shall be able to monitor the following
information of the control cabinet in real time:
a) Input voltage, current, frequency of the power supply;
b) Input power supply failure alarm;
c) Display the measurement data of the rail temperature sensor and failure alarm;
d) The working status, working voltage, current and failure alarm of each heating
circuit;
e) Records of working status of contactors, circuit breakers and leakage protectors;
f) Control cabinet door status and door-opening alarm.
5.4.5 The storage time of various real-time information records of control terminals and
workstations shall be no less than 12d; after the snow-melting equipment is powered
off, the recorded information shall not be lost, and shall have the following
management functions:
a) Input power supply voltage, current, frequency and failure alarm records;
b) Working status of heating circuit and failure alarm record;
c) Monitoring data record and failure alarm record of rail temperature sensor;
d) Operation records of the user;
e) Statistics of heating time, number of heating and total power consumption of each
heating circuit of the control cabinet; and the accuracy of the heating time d...