This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of lightning arresters in cable distribution systems for 5MHZ~1750MHz television and sound signals. This standard applies to lightning arresters in cable distribution systems for 5MHZ~1750MHz television and sound signals. GB/T 11318.14-1996 Cable distribution systems for television and sound signals Equipment and components Part 14: General specifications for lightning arresters GB/T11318.14-1996 Standard download decompression password: www.bzxz.net

1 Scope
National Standard of the People's Republic of China
Equipment and components used in cabled distribution systems primarily intended for television and television signals Part 14: Generic specifications for arrester GB/T11318.14—1996
This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of arresters in cabled distribution systems for television and sound signals of 5MHz to 1750MHz. This standard applies to arresters in cabled distribution systems for television and sound signals of 5MHz to 1750MHz. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards: GB3482-83 Lightning test method for electronic equipment GB3483-83 Lightning test guide for electronic equipment GB/T11318.1-1996 Cable distribution system equipment and components for television and sound signals Part 1: General specification Cable distribution system equipment and components for television and sound signals Part 9: General specification for power supply equipment GB/T 11318. 9-1996
3 Definitions
This standard adopts the following definitions, and other definitions should comply with the relevant provisions in GB/T11318.1. 3.1 Surge
A unidirectional voltage or current wave that has no obvious oscillations and rises rapidly to a peak value and then drops slowly to zero. The parameters that specify the surge voltage and surge current are polarity, wave front time, and wave tail drop to half the peak value time. 3.2 Full-wave unipolar impulse voltage full monopole surge voltage refers to the non-periodic transient voltage wave that has not been truncated, as shown in Figure 1. It is generally calculated as T,/T, us, T, is the apparent presurge time, and T, is the apparent half-peak time.
Approved by the State Administration of Technical Supervision on September 9, 1996 and implemented on May 1, 1997
GB/T 11318.14—1996
Figure 1 Full-wave unipolar impulse voltage
3.2.1 Apparent presurge time T, T, us
refers to the time interval when the voltage is 0.3 and 0.9 of the peak value (points A and B in Figure 1) multiplied by 1.67. If oscillation occurs in the wave front, A and B should be selected on the average line drawn by these oscillations. 3.2.2 Apparent origin O1 apparent reference point O1 refers to the time scale leading point A by 0.3T. For the slow scan oscillogram, draw a straight line through points A and B on the wavefront and intersect the horizontal axis, and the intersection is the apparent origin 01.
3.2.3 Apparent half-surge time T, apparent half-surge time Tz refers to the time interval from the apparent origin to the time when the voltage drops to the peak value 0.5. 4 Product classification
Lightning arresters are divided into two types: indoor and outdoor. According to different uses, they can be divided into general lightning arresters, antenna lightning arresters and current-through lightning arresters.
5 Requirements
5.1 General requirements
The general requirements of lightning arresters shall comply with the provisions of 4.1.1 in GB/T11318.1-1996. 5.2 Performance parameters
The performance parameter requirements of lightning arresters are shown in Table 1.
Impact resistance
5 MHz~550 MHz
47MHz~800 MHz
5MHz～550MHz
47 MHz~800 MHz
1.2/50μus
10/700μs
Performance parameters
General lightning arrester
Not specified
Antenna lightning arrester
Not specified
Signal to AC sound ratio
Current carrying capacity
Through voltage
GB/T11318.14—1996
Table 1 (end)
Note: Items 4, 5, and 6 in the serial number are only applicable to current-through type lightning arresters. 5.3 Environmental adaptability
General lightning arrester
60(50 Hz)
Antenna lightning arrester
The environmental adaptability requirements of the lightning arrester shall comply with the provisions of 4.3 of GB/T11318.1-1996. The test item of the indoor lightning arrester after high temperature, constant humidity and heat, low temperature (outdoor type), sealing (outdoor type), sweep frequency vibration, and collision tests is the insertion loss. After the low temperature or salt spray (outdoor type) and free fall test, the performance test is carried out according to the items specified in Table 1, and the test results shall comply with the relevant provisions of Table 1.5.4 Reliability
The lower limit value 1 of the reliability index mean time between failures (MTBF) of the lightning arrester shall not be less than 40000h. The failure criterion is that the insertion loss changes by more than ±1.5dB compared with that before the test; or the discharge cannot be normal during the impulse voltage test.5.5 Electromagnetic compatibility
The electromagnetic compatibility of the lightning arrester The compatibility requirements shall comply with the relevant provisions of 4.6 of GB/T11318.1-1996. Test methods
6.1 General requirements
The test methods for general requirements of lightning arresters shall be carried out in accordance with the provisions of 4.1.2 of GB/T11318.1-1996. 6.2 Performance parameters
6.2.1 Insertion loss, reflection loss, signal-to-noise ratio The insertion loss, reflection loss, and signal-to-noise ratio of lightning arresters shall be measured in accordance with the provisions of GB/T11318.1-1996. .1--1996 in accordance with the relevant provisions of 4.2.2. The current carrying capacity measurement method shall be carried out in accordance with the provisions of 6.2.3 in GB/T11318.9-1996. 6.2.2 Impulse voltage resistance
6.2.2.1 Test block diagram
See Figure 2.
Digital pulse
impulse
voltmeter
oscilloscope
impulse
voltage
generatorbzxz.net
6.2.2.2 Test and measurement|| tt||Tested arrester
Figure 2 Equipment connection for impulse voltage test
6.2.2.2.1 Adjust the impulse voltage generator so that the waveform and amplitude of the no-load output voltage meet the relevant provisions of Table 1 of this standard. 6.2.2.2.2 Connect the tested arrester to the impulse voltage wave generator according to Figure 2. 6.2.2.2.3 Carry out impulse tests on the arrester twice, once for positive and negative polarity, with an interval of not less than 1 minute. 417
GB/T 11318.14—1996
6.2.2.2.4 The insertion loss and reflection loss of the arrester measured after the test shall comply with the relevant provisions of Table 1 of this standard. 6.3 Environmental adaptability
The environmental adaptability test method of the arrester shall be carried out in accordance with the relevant provisions of 4.3 of GB/T11318.1-1996. The test temperature group of the general-purpose arrester is Group I, and the test temperature group of the outdoor arrester is Group I. 6.4 Reliability
Reliability test method of the arrester The test method shall be carried out in accordance with the provisions of 4.4 of GB/T11318.1-1996. The test plan is Plan 1. 6.5 Electromagnetic compatibility
The electromagnetic compatibility test method of the lightning arrester shall be carried out in accordance with the relevant provisions of 4.6 of GB/T11318.1-1996. 7 Inspection rules
The inspection rules of lightning arresters shall comply with the relevant provisions of Chapter 5 of GB/T11318.1-1996. The main electrical performance parameter detection items during the delivery inspection are insertion loss and impulse withstand voltage. 8 Marking, packaging, transportation and storage
The marking, packaging, transportation and storage of lightning arresters shall comply with the relevant provisions of Chapter 6 of GB/T11318.1-1996. 418
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