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GB/T 25338.2-2019 English PDF

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GB/T 25338.2-2019: Switch machines for railways -- Part 2: Test methods
Status: Valid

GB/T 25338.2: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25338.2-2019	279	Add to Cart	3 days	Switch machines for railways -- Part 2: Test methods	Valid
GB/T 25338.2-2010	399	Add to Cart	3 days	Switch machine for railway -- Part 2: Test methods	Obsolete

Similar standards

TB/T 3539 TB/T 2296 GB/T 25338.1 GB 10494 GB 10493

Basic data

Standard ID: GB/T 25338.2-2019 (GB/T25338.2-2019)
Description (Translated English): Switch machines for railways -- Part 2: Test methods
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: S61
Classification of International Standard: 45.020
Word Count Estimation: 14,118
Date of Issue: 2019-08-30
Date of Implementation: 2020-03-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 25338.2-2019: Switch machines for railways -- Part 2: Test methods

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Switch machines for railways - Part 2.Test methods ICS 45.020 S61 National Standards of People's Republic of China Replace GB/T 25338.2-2010 Railway turnout switch machine Part 2.Test method 2019-08-30 released 2020-03-01 Implementation State Administration for Market Regulation Issued by China National Standardization Administration

Preface Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Test conditions 2 5 General test method 2 6 Test of switch machine 6

Foreword

GB/T 25338 "Railway Switch Point Machine" is divided into 2 parts. ---Part 1.General technical conditions; ---Part 2.Test method. This part is Part 2 of GB/T 25338. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 25338.2-2010 "Railway Turnout Switch Machine Part 2.Test Method", and it is the same as GB/T 25338.2- Compared with.2010, the main technical changes except for editorial changes are as follows. --- Increase the vibration resistance test requirements for the superposition of 2 or more resonance peaks (see 5.14, 5.13 in the.2010 edition); ---Modified the vibration test requirements (see 5.14, 5.13 of the.2010 edition); ---Modified the friction coupling performance test method (see 6.4,.2010 edition 6.4); --- The inspection of the shift contactor has been deleted (see 6.10 in the.2010 edition). This part is proposed and managed by the National Railway Administration. Drafting organizations of this section. Xi'an Lutong No. Equipment Research Co., Ltd., Xi'an Railway Signal Co., Ltd., Tianjin Railway Signal Co., Ltd. The main drafters of this section. Zhang Hui, Hao Lina, Wang Tao, Mei Jigang, Zhang Zhen. The previous versions of the standards replaced by this part are as follows. ---GB/T 25338.2-2010. Railway turnout switch machine Part 2.Test method

1 Scope

This part of GB/T 25338 specifies the terms of electric point machine, electro-hydraulic point machine and electric-air point machine (hereinafter referred to as "point machine"), Test conditions and general test methods. This section applies to the test of electric point machines, electro-hydraulic point machines and electric-air point machines.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GB/T 2408-2008 Determination of the flammability of plastics horizontal method and vertical method (IEC 60695-11-10.1999, IDT) GB/T 2423.1-2008 Environmental testing of electric and electronic products Part 2.Test method Test A. Low temperature (IEC 60068-2-1.2007, IDT) GB/T 2423.2-2008 Environmental testing of electric and electronic products Part 2.Test method Test B. High temperature (IEC 60068-2-2.2007, IDT) GB/T 2423.4-2008 Environmental testing of electric and electronic products Part 2.Test method Test Db. Alternating damp heat (12h 12h cycle) (IEC 60068-2-30.2005, IDT) GB/T 2423.16-2008 Environmental testing of electrical and electronic products Part 2.Test method Test J and guidelines. Mold growth (IEC 60068-2-10.2005, IDT) GB/T 2423.17-2008 Environmental testing of electric and electronic products Part 2.Test method Test Ka. Salt spray (IEC 60068-2-11.1981, IDT) GB/T 4208-2017 Enclosure protection class (IP code) (IEC 60529.2013, IDT) GB/T 4942.1-2006 Protection level (IP code) classification of the overall structure of rotating electrical machines (IEC 60034-5.2000, IDT) GB/T 5171.21-2016 Small power motors Part 21.General test methods GB/T 25338.1-2019 Railway Turnout Switch Machine Part 1.General Technical Conditions

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Electrical characteristics The operating current and operation of the switch machine under the single-wire resistance conditions specified by the rated switching force, rated voltage or power supply voltage (AC) string Time; the action time of the electric-air point machine under the conditions of rated conversion force, rated wind pressure and control voltage. 3.2 Control voltage The voltage across the solenoid valve coil of the electric switch machine. 3.3 Rated wind pressure The electric empty switch machine realizes the calibrated design wind pressure value during normal operation. 3.4 Single wire resistance A single wire resistance on the transmission path of the power supply to the motor end of the switch machine.

4 Test conditions

4.1 Standard atmospheric conditions for the test The tests specified in this section (except for special regulations) are all carried out under standard test atmospheric conditions. a) Temperature. 15℃~35℃; b) Relative humidity. 45%~75%; c) Air pressure. 86kPa~106kPa. 4.2 Test standard atmospheric conditions for arbitration measurement The standard atmospheric conditions for the arbitration measurement test are as follows. a) Temperature. 20℃±2℃; b) Relative humidity. 60%~70%; c) Air pressure. 86kPa~106kPa.

5 General test methods

5.1 Test power supply Power supply for test switch machine. AC regulated power supply for AC switcher, AC regulated bridge full-wave rectifier power supply for DC switcher (not (With filter), AC voltage stabilized bridge type full-wave rectifier power supply for the electromagnetic directional valve control power supply of the electric empty switch machine. 5.2 Instruments for testing switch machines The test instruments of the switch machine include. ---Electromagnetic instrument. accuracy is 0.5 level; ---Electric stopwatch. accuracy is 0.006s; ---Pressure gauge. accuracy is 1.5; --- Dynamometer. accuracy is 1%; ---Megger. voltage level 500V, 250V; --- Tension and compression dynamometer. accuracy 1%; ---Digital DC low resistance meter. accuracy is 0.2 level; --- The flashover breakdown device of the insulation withstand voltage test is an AC 50Hz sine wave, and the leakage current capacity should not be less than 0.5A. 5.3 Visual inspection Perform visual inspection or manual visual inspection according to product standards or technical conditions. 5.4 Insulation resistance and insulation withstand voltage test 5.4.1 Insulation resistance Insulation resistance test uses a 500V megohmmeter to test between conductive parts and between conductive parts and the chassis (ground), normal insulation The resistance and the insulation resistance after damp heat should meet the requirements of the product standard. 5.4.2 Insulation withstand voltage 5.4.2.1 Test voltage. DC switch machine adopts AC 50Hz,.2000V; AC switch machine adopts AC 50Hz, 2400V; electric idling The track machine adopts AC 50Hz and 1000V. 5.4.2.2 Test voltage application location. between conductive parts and between conductive parts and the chassis (ground). 5.4.2.3 The voltage application time is 1min. If the test voltage is increased by 25%, the test time can be shortened to 1s. 5.4.2.4 The test voltage should be increased from half of the test voltage value to the specified value, and the voltage should be maintained for the specified test time, and then decreased to zero. 5.4.2.5 The insulation withstand voltage test should be carried out at room temperature; during the alternating damp heat test, the test should be resumed 2h after the end of the test. 5.4.2.6 The leakage current during the insulation withstand voltage test should not be higher than 5mA. 5.4.2.7 Insulation withstand voltage test is generally performed once. When repeated tests are required, the voltage should be 80% of the original test value. 5.5 Contact pressure test Measure with a dynamometer in the closed position of the contact. The dynamometer should apply force along the normal direction of the contact surface at the specified point of action, When the indicator in the contact series circuit sends out a signal, the reading of the dynamometer at this time is the contact pressure; the hump uses the contact pressure of the electric empty switch machine The force test shall meet the requirements of the ZK series electric-pneumatic switch machine standard. 5.6 Contact resistance test In the closed position of the contact, use a four-wire lead low resistance meter to test on the corresponding terminal of the contact. According to the difference of the resistance of the contact, The corresponding test gear should be converted. 5.7 Shell protection test 5.7.1 The protection test of the switch machine shell shall be carried out in accordance with the provisions of GB/T 4208-2017. 5.7.2 The motor enclosure protection test shall be carried out in accordance with the provisions of GB/T 4942.1-2006. 5.8 Water spray test of switch machine rod The water spray test of the lever of the switch machine is carried out in accordance with the provisions of GB/T 4208-2017.After the extension action is 3 times, the water on the lever should not enter the machine. 5.9 Temperature rise test of DC motor 5.9.1 Use the resistance method to measure the temperature rise of the motor windings. 5.9.2 Take the winding resistance R1 before the start of the test. When taking the measurement, one value should be taken every time the rotor rotates 120°, and the result is the average value after three times. 5.9.3 The test is carried out under the standard atmospheric conditions of the test. Apply the rated voltage, 1.5 times the rated current, and the continuous power-on time should meet the requirements of the product standard. 5.9.4 Measure the winding resistance R2 at the end of the test. The value method is the same as 5.9.2.This process should be completed within 15s after the power is cut off. 5.9.5 The temperature rise Δt (℃) of copper wire winding is determined by formula (1). 5.9.6 The correction of the temperature rise limit when the ambient temperature during the test is different from the operating ambient temperature shall be carried out in accordance with the provisions of GB/T 5171.21-2016. 5.10 Plastic combustion performance test of switch cover The plastic combustion performance test should be carried out in accordance with the provisions of the vertical method in GB/T 2408-2008, and the test results should meet the product standards. 5.11 Low temperature test The low temperature test of the switch machine should be carried out in accordance with the provisions of the test Ab in GB/T 2423.1-2008, and should meet the following requirements. a) Initial inspection. visual inspection and electrical and mechanical performance inspection of test samples; b) Condition test. Put the test sample in the test box according to the normal position in the unpacked, unpowered, and "ready to use" state; c) Severity level. temperature -40℃±2K, duration 2h; d) Intermediate test. In the last 15 minutes of the condition test, the electrical characteristics of the test sample should be checked to meet the requirements of the product standard; e) Final test. Take the test sample out of the test box and place it at room temperature for 2h. Check that the electrical characteristics of the test sample should meet the requirements of the product standard. 5.12 High temperature test The high temperature test of the switch machine should be carried out in accordance with the requirements of Test Bb in GB/T 2423.2-2008, and should meet the following requirements. a) Initial inspection. visual inspection and electrical and mechanical performance inspection of test samples; b) Condition test. Put the test sample in the test box according to the normal position in the unpacked, unpowered, and "ready to use" state; c) Severity level. temperature 70℃±2K, duration 2h; d) Intermediate test. In the last 15 minutes of the condition test, the electrical characteristics of the test sample should be checked to meet the requirements of the product standard; e) Final test. Take the test sample out of the test box and place it at room temperature for 2h. Check that the electrical characteristics of the test sample should meet the requirements of the product standard. 5.13 Alternating damp heat test The alternating damp heat test of the switch machine should be carried out in accordance with the relevant regulations of GB/T 2423.4-2008, and should meet the following regulations. a) Initial inspection. Perform visual inspection of the test sample and test its electrical and mechanical properties; b) Condition test. Put the unpackaged, unpowered test sample in the "ready to use" state in the test box according to its normal working position; c) Severity. temperature 40℃, cycle times 12; d) The temperature should be cooled according to method 2 in 7.3.3 of GB/T 2423.4-2008; e) Intermediate test. The moisture insulation resistance should meet the product standard in the last 2h of the low temperature and high humidity stage of the last cycle of the test. Standard requirements; f) Final test. After the test is over, the insulation resistance or insulation withstand voltage shall be tested immediately after recovery for 2 hours, and the test result shall meet the requirements of the product standard. 5.14 Vibration test The vibration test of the switch machine should be carried out according to the following regulations. a) Installation of the sample. The switch machine is fixed on the vibration table according to the state of use, and the closed contact is connected to the indicating circuit; b) Vibration direction. vertical axis and horizontal movement along the movement direction of the switch machine; c) Vibration method. perform a frequency sweep test on the sample to find the resonance frequency; d) Sweep frequency test. the frequency range, displacement full amplitude and acceleration amplitude should meet the requirements of 5.19 in GB/T 25338.1-2019; e) Vibration endurance test. According to the provisions of Table 4 and Table 5 in GB/T 25338.1-2019, during the test, the contact should be able to display the relay The electrical appliances are kept in the suction position, and the equipment installed next to the line with the switch machine should meet the technical requirements of the relevant equipment; f) Final inspection. Check the appearance and electrical characteristics of the samples and meet the requirements of product standards. The vibration test of the quick switch machine is in accordance with its product standard. 5.15 Mold growth test The mold growth test of the switch machine should be carried out in accordance with the provisions of GB/T 2423.16-2008, and should meet the following provisions. a) Initial inspection. clean the samples with distilled water and conduct visual inspection before the test; b) Severity level. test duration 28d; c) The growth degree of mold is not less than 2b; d) Final test. After the 28d exposure is over, the sample taken out should be observed immediately. 5.16 Salt spray test The salt spray test of the switch machine should be carried out in accordance with the provisions of GB/T 2423.17-2008, and should meet the following provisions. a) Initial inspection. visually inspect the coating without obvious damage or scratches; before the test, the surface of the test sample should be clean, free of oil, no temporary protective layer and other defects; b) Condition test. The sample should be tested according to the normal use state, and there should be no contact between the samples, nor with other metal parts; c) Test period. 96h; d) Recovery. After the test, it should be rinsed under running water for 5 minutes, then rinsed with distilled water or deionized water, and then shaken or Use airflow to dry and remove the water droplets. The temperature of the cleaning water should not exceed 35°C; the sample should be placed under standard recovery conditions for not less than 1h and not more than 2h; e) Final inspection. The appearance of the recovered test sample should meet the following requirements. The main surface of the metal galvanized layer should be free of white or gray black Color corrosion products; the main surface of the metal nickel plating layer should be free of gray or light green corrosion products. When using other anti-corrosion treatments, It is lower than the regulations for zinc plating and nickel plating. 5.17 Life test of switch machine 5.17.1 The life test of the point machine should be under the conditions of rated conversion force, rated voltage (DC type) or power supply voltage (AC type) and single-wire resistance. The action rod is extended or pulled in once, and the interval is 6s~15s. 5.17.2 During the test, the allowable voltage fluctuation range is 98% to 102% of the specified value. Rated conversion force fluctuation range is a specified value 97%~103%, the fluctuation range of wind pressure is 95%~105% of the specified value. 5.17.3 During the test, normal maintenance of the equipment is allowed when more than 1×105 times, and the wearing parts specified in the product standard are allowed to be replaced, but disassembly and repair are not allowed. 5.17.4 The final test shall be carried out according to the conditions specified in the product standard of the test sample.

6 Test of switch machine

6.1 Test of electrical characteristics of DC switch machine 6.1.1 The test circuit is shown in Figure 1.The circuit of the control relay in the driving diagram should conform to the driving circuit of this type of switch machine or its equivalent circuit. 6.1.2 Under the conditions of rated voltage (1±2%) and rated conversion force (1±3%), the DC switch machine can operate several times continuously to achieve stable performance. After setting, start to record the test data, push and pull each action 5 times, 5 times should be qualified, whichever is the maximum. 6.2 Test of electrical characteristics of three-phase AC switch machine 6.2.1 The test circuit is shown in Figure 2.The circuit of the control relay in the driving diagram should conform to the driving circuit of this type of switch machine or its equivalent circuit. 6.2.2 The AC point machine is in the power supply voltage (1 ± 2%) (when the three-phase power supply voltage is unbalanced, take the average value), string the specified single-wire resistance, Under the condition of constant conversion force (1±3%), after continuous action until the performance is stable, start to test and record data, push and pull each action 5 times, 5 times should be qualified, whichever is the maximum. 6.3 Test of electrical characteristics of electric-air point machine 6.3.1 The test circuit is shown in Figure 3.The circuit of the control relay in the driving diagram should conform to the driving circuit of this type of switch machine or its equivalent circuit. 6.3.2 During the test, the fluctuation range of the rated conversion force is 97%~103% of the specified value, and the fluctuation range of the rated wind pressure is the specified value 95%~105%, and equipped with an air storage tank of no less than 0.8m3, and the air pressure range of the air storage tank is tested under the condition of 0.6MPa~0.8MPa. 6.3.3 After several consecutive actions under the conditions of rated wind pressure and rated conversion force, start to record the test data, push and pull each action 5 times, 5 times should be qualified, whichever is the maximum. 6.4 Performance test of friction coupling and relief valve......

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Question 1: How long will the true-PDF of GB/T 25338.2-2019_English be delivered?

Answer: Upon your order, we will start to translate GB/T 25338.2-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 25338.2-2019_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 25338.2-2019_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

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Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 25338.2-2019?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 25338.2-2019 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.