GB/T 19216.3-2021 English PDF

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GB/T 19216.3-2021: Circuit integrity test for electric cables or optical fiber cables under fire conditions - Part 3: Test method for fire with shock at a temperature of at least 830℃ for cables of rated voltage up to and including 0.6/1 kV tested in a metal enclosure
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GB/T 19216.3-2021	414	Add to Cart	4 days	Circuit integrity test for electric cables or optical fiber cables under fire conditions - Part 3: Test method for fire with shock at a temperature of at least 830℃ for cables of rated voltage up to and including 0.6/1 kV tested in a metal enclosure	Valid

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Basic data

Standard ID: GB/T 19216.3-2021 (GB/T19216.3-2021)
Description (Translated English): Circuit integrity test for electric cables or optical fiber cables under fire conditions - Part 3: Test method for fire with shock at a temperature of at least 830�� for cables of rated voltage up to and including 0.6/1 kV tested in a metal enclosure
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K13
Word Count Estimation: 22,212
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 19216.3-2021: Circuit integrity test for electric cables or optical fiber cables under fire conditions - Part 3: Test method for fire with shock at a temperature of at least 830℃ for cables of rated voltage up to and including 0.6/1 kV tested in a metal enclosure

---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.
(Under high temperature conditions or optical cable line cable test Part 3.Flame temperature test 830 ℃ for fire, impulse vibration, voltage voltage and cable offline test in a metal tube.) ICS 29.060.20 CCSK13 National Standards of People's Republic of China Line integrity test of cables or optical cables under flame conditions Part 3.Fire supply with flame temperature not less than 830℃ Apply shock and vibration, rated voltage 0.6/1kV and below Test method for cable piercing in metal pipe (IEC 60331-3.2018, Testforelectriccablesunderfireconditions- Released on 2021-05-21 and implemented on 2021-12-01 State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅰ Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 Test environment 2 5 Test equipment 2 6 Sample (power cable and control cable with rated voltage 0.6/1kV and below) 10 7 Test procedure (power cable and control cable with rated voltage 0.6/1kV and below) 11 8 Performance requirements (power cables and control cables with rated voltage 0.6/1kV and below) 12 9 Repeat the test procedure 13 10 Test report (power cable and control cable with rated voltage 0.6/1kV and below) 13 Appendix A (Normative) Verification Procedure for Heat Source 14 Reference 16 Line integrity test of cables or optical cables under flame conditions Part 3.Fire supply with flame temperature not less than 830℃ Apply shock and vibration, rated voltage 0.6/1kV and below Test method for cable piercing in metal pipe

1 Scope

This document describes the test to maintain the integrity of the circuit when the fire-resistant cable is put in a metal pipe and is subjected to flame and shock vibration under specified conditions. This document applies to cables with a rated voltage of 0.6/1kV and below, including metal conductor data and telecommunications with a rated voltage below 80V Electric cables and optical cables. This document applies to test cables with an outer diameter less than or equal to 20mm. This document describes the test failure points, continuity check devices, and test points of power cables and control cables with a rated voltage of 0.6/1kV and below. Detailed information of the test samples, test procedures and test reports. The metal conductor data and the test failure point and continuity of telecommunications cables and optical cables are not given. Detailed information about the test equipment, test samples, test procedures and test reports. Although the scope of application is limited to cables with a rated voltage of 0.6/1kV and below, when the manufacturer and the buyer agree, and are equipped with suitable After the fuse, it can also be applied to cables with a rated voltage of 1.8/3(3.3)kV and below. It is not assumed that cables successfully evaluated by this method can also pass the requirements of GB/T 19216.1-2021 or GB/T 19216.2-2021.Correct Tests for either of these two standards must be carried out separately. According to Chapter 11 of GB/T 19216.1-2021 or GB/T 19216.2-2021 According to Chapter 11, this additional performance can be identified by marking. Appendix A gives the verification method of the burner and control system used in the test. Caution. The tests in this document may involve the use of dangerous voltages and temperatures. Appropriate precautions should be taken to prevent possible Risks of electric shock, burning, fire and explosion, as well as any harmful gases that may be produced.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 19216.1-2021 Cable or optical cable line integrity test under flame conditions Part 1.The flame temperature is not lower than Test method for cables with external diameter exceeding 20mm with a rated voltage of 0.6/1kV and below by supplying fire at 830℃ and applying shock and vibration (IEC 60331-1.2018, IDT) GB/T 19216.2-2021 Cable or optical cable line integrity test under flame conditions Part 2.The flame temperature is not lower than Test method for cables with an external diameter of not more than 20mm after supplying fire at 830℃ and applying shock and vibration, rated voltage 0.6/1kV and below (IEC 60331-2.2018, IDT) IEC 60269-3 Low-voltage fuses Part 3.Supplementary requirements for fuses used by unskilled personnel (mainly used for household and class (Fuses for similar purposes) Examples of standardized fuse systems A to F (Low-voltagefuses-Part 3.Supplementaryre- Requirementsforfusesforusebyunskiledpersons(fusesmainlyforhouseholdandsimilarapplica- tions)-ExamplesofstandardizedsystemsoffusesAtoF] IEC 60584-1 Thermocouple Part 1.Thermoelectromotive force specifications and tolerances (Thermocouples-Part 1.EMFspecifica- tionsandtolerances)

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Circuitintegrity The ability to operate continuously in a specified state when burning under a specified fire source and time. 3.2 Draught-free environment A space where the test results will not be significantly affected by the local air velocity.

4 Test environment

The test should be carried out in a suitable box with a minimum volume of 20m3 in an air-free environment. Any harmful gas facilities. There should be sufficient ventilation to maintain the flame during the test. The position of the air inlet and exhaust chimney should be verified Keep the burner flame stable during the process and test. If necessary, use a windscreen to protect the burner from any airflow. In order to observe the condition of the cable during the test, an observation window can be installed on the wall of the box. Exhaust smoke should pass through a chimney at least 1m away from the burner Natural ventilation is achieved. A damper can be used to adjust the ventilation conditions. Note. Experience shows that a "3m cube" cabinet similar to GB/T 17651.1 is suitable. At the beginning of each test, the box and the test device should be kept between 10°C and 40°C. In the process of verification and cable test, the ventilation and barrier conditions in the box should be the same.

5 Test equipment

5.1 Test device The test device shall consist of the following parts. a) A metal pipe penetrating the test specimen, consisting of a straight circular cross-section stainless steel pipe as described in 5.2; b) A test ladder frame for installing metal pipes, including a steel frame fixed on a rigid support as described in 5.3; c) Heat source, horizontally installed belt burner as described in 5.4; d) The shock and vibration generating device described in 5.5; e) The test wall is equipped with the thermocouple used to verify the heat source described in Appendix A; f) The continuity check device described in 5.7; g) The fuse described in 5.8. The general layout of the test device is shown in Figure 1, Figure 2, Figure 3 and Figure 4. 5.6 Location of heat source The burner should be placed in the test box, and the burner's spray surface should be at least.200mm away from the box floor or any mounting plate, and the distance from any box The body wall is at least 500mm. Taking the centerline of the metal tube as the reference, the burner should be positioned at the horizontal distance between the burner surface and the centerline of the metal tube as (H± 2)mm, the vertical distance between the centerline of the burner and the centerline of the metal tube is (V±2)mm, as shown in Figure 4. During the test, the H and V values to determine the correct position of the burner should be equal to the H'and V'values determined by the verification procedure in Appendix A. During the test, the burner should be firmly fixed on the bracket to prevent relative displacement with the sample. 5.7 Continuity check device (power cable and control cable with rated voltage 0.6/1kV and below) During the test, the current used for continuity check should flow through all conductors of the cable, and the current should be changed by a three-phase star connection. The transformer or single-phase transformer (group) is provided. The transformer should have sufficient capacity to maintain the test voltage when the maximum allowable leakage current is reached. Note 1.When determining the rated power of the transformer, pay attention to the characteristics of the fuse. This current should be obtained by connecting an appropriate load and indicating device (such as a bulb) to each conductor or group of conductors at the other end of the sample. Note 2.Under the test voltage, the current passing through each conductor or group of conductors is preferably 0.25A. 5.8 Fuse The fuse used in the test procedure in Chapter 7 shall be DⅡtype 2A in accordance with IEC 60269-3 fuse system A to D. A circuit breaker with equivalent characteristics can be used instead. When using a circuit breaker, the equivalent characteristics should be verified in accordance with the characteristic curve shown in IEC 60269-3. When there is a dispute, the fuse test method should be used. 6 Samples (power cables and control cables with rated voltage 0.6/1kV and below) 6.1 Sample preparation The cable length used for the test should be at least 15.3m for single-core cables and at least 5.1m for multi-core cables. Test specimen The multi-core cable should be one section, and the single-core cable should be three sections, each section is not less than 1700mm in length, and about 100mm is stripped at each end of the cable The sheath or outer sheath. At each end of the specimen, each conductor should be properly treated for electrical connection, and then an appropriate metal tube should be inserted into it, and it should be divided. Open exposed conductors to avoid contact with each other. 6.2 Installation of the sample The sample should be penetrated into a suitable metal tube and should be placed flat on the wall of the metal tube. The metal tube should be selected according to the diameter of the test cable. For multi-core sheathed cables (including multi-pair and multi-three-wire cables), the metal tube should be selected according to Table 2.For single-core sheathed or non-sheathed cables, the metal tube should be 3Select the metal pipe. The sample should be placed in a metal tube, with each end extending out of the metal tube more than 100mm. Table 2 Multi-core sheathed cable 7 Test procedure (power cable and control cable with rated voltage 0.6/1kV and below) 7.1 Test device and arrangement The test procedures specified in this chapter should be carried out using the test equipment detailed in Chapter 5. Pass the sample into the metal tube, and adjust the relative position of the burner and the metal tube correctly according to 5.6. 7.2 Electrical connection At the end of the sample near the transformer, ground the neutral conductor (if present) and all protective conductors. All metal shields, drain wires or The metal layers should all be connected to each other and grounded. Connect the transformer to each conductor, but not including the neutral conductor indicated in the circuit diagram in Figure 8. Body or protective conductor. If the metal sheath, armor or shield is used as a neutral conductor or a protective conductor, the circuit shown in Figure 8 should be used. As shown in the figure, connect as a neutral or protective conductor. The metal pipe should be grounded. For single-phase, two-phase or three-phase cables, each phase conductor should be connected to each phase of the transformer output end, and each phase of the transformer output end should be connected to each phase. Connect a 2A fuse or circuit breaker with equivalent characteristics in series. When the sample is composed of 3 single-core cables, each single-core cable is tested This should be used as a phase conductor. For multi-core cables with four cores or more (excluding any neutral or protective conductors), the conductors should be divided into three roughly equal Group, and should be as far as possible so that adjacent conductors are in different groups. For multi-pair cables, the conductors should be divided into two equal groups, and ensure that the a core of each pair is connected to one phase, and the b core of each pair is connected Connect to the other phase (L1 and L2 in Figure 8). The four-wire group should be treated as 2 wire pairs. For multi-three-wire cables, the conductors should be divided into three equal groups, and ensure that the a core of each three-wire group is connected to one phase of the transformer, and each The b core of a three-wire group is connected to the other phase of the transformer, and the c core of each three-wire group is connected to the third phase of the transformer (L1, L2 in Figure 8 And L3). Connect the conductors in each group in parallel, and then connect them to each phase of the transformer output end. Each phase of the transformer output end should be connected in series A 2A fuse or circuit breaker with equivalent characteristics. The above test procedure grounds the neutral conductor. If the cable is designed to be used in a system where the neutral conductor is not grounded, the neutral conductor may not be Grounded. If the cable product standard requires, the neutral conductor can be used as the phase conductor for testing. When the metal sheath, armor or shield is used as a medium Sexual conductors should always be grounded. Any such changes in the test method should be stated in the test report. For cable structures not described above, it is advisable to connect adjacent conductors to different phases as much as possible when applying the test voltage. In some cases, for example, when using a three-phase transformer to test a control cable, it may not be possible to test between conductors and between conductors and ground. The rated voltage of the cable is applied simultaneously. In this case, the rated voltage of the cable should be applied between the conductors or between the conductors and the ground. Pressure. In this way, the test voltage between the conductors and the test voltage between the conductor and the ground is equal to or higher than the rated voltage of the cable. At the other end of the specimen away from the transformer. --- Connect a conductor or a group of conductors to one end of the load and indicating device (as described in 5.7), and the other end is grounded; ---Connect the neutral conductor and all protective conductors to one end of the load and indicating device (as described in 5.7), and the other end to the transformer L1 (or L2 or L3) at the end of the device (see Figure 8). 7.3 Supplying fire and applying shock and vibration Ignite the burner and adjust the propane and air flow to the values obtained in the verification procedure in Appendix A. After igniting the burner, the shock vibration generator should be started immediately, and the test timer should be started at the same time. Within 5min±10s after starting And every 5min±10s thereafter, the impact vibration generating device shall impact the test ladder frame. After each impact, the impact rod should be Lift from the test ladder frame within 20s. 7.4 Applied voltage After the test timer starts, the power should be turned on immediately and the voltage should be adjusted to the rated voltage of the cable (the minimum voltage is AC 100V), that is, the test voltage between the conductors should be equal to the rated voltage between the conductors. The test voltage between the conductor and the ground should be equal to the Rated voltage between ground. The test shall be carried out continuously for the time given in 8.1, after which the flame shall be extinguished. 8 Performance requirements (power cables and control cables with rated voltage 0.6/1kV and below) 8.1 Fire time The fire supply time should be specified in the relevant cable product standards. If it is not specified, the time for fire and impact should be selected as 30min, 60min, 90min and 120min. 8.2 Eligibility criteria In accordance with the test procedures given in Chapter 7, cables that maintain the integrity of the circuit, as long as during the test. ---The voltage is maintained, that is, no fuse is blown or the circuit breaker is disconnected; ---The conductor is not disconnected, that is, none of the bulbs goes out. Failure of any of the criteria listed shall be considered as a failure of the cable test.

9 Repeat the test procedure

If the test fails, according to the requirements of the relevant standards, two additional samples should be taken from the same sample to repeat the test. If two samples If all meet the test requirements, the test shall be deemed qualified. 10 Test report (power cable and control cable with rated voltage 0.6/1kV and below) The test report should include the following. a) The number of this document; b) A complete description of the tested cable; c) The manufacturer of the cable under test; d) The number of sample sections; e) The size of the metal pipe; f) Test voltage; g) Use of any option in the test procedure (i.e. failure detection method); h) The temperature monitoring method used in the verification procedure (in accordance with Appendix A); i) The mechanism of the test failure point (i.e. the voltage is not maintained or the conductor is disconnected); j) Actual performance requirements (refer to Chapter 8 or related cable product standards); k) Fire supply time; l) Any changes to the prescribed test procedures; m) The volume of the test chamber and the temperature at the beginning of the test. ......

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