GB/T 2951.23-1994 Test methods for mechanical and physical properties of wires and cables - Bending test

This standard specifies the test equipment, sample preparation, test steps, test results and calculations for the bending test. This standard applies to the bending test of cables for fixed installation. The general provisions, definitions and regular calibration of the mechanical and physical properties test of wires and cables are specified in GB/T 2951.1. GB/T 2951.23-1994 Test methods for mechanical and physical properties of wires and cables Bending test GB/T2951.23-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Test method for determining mechanical and physical properties of electric cableg and wlresBending test
1 Subject content and scope of application
GB/T 2951.2394
Replaces GB2951.2382
This standard specifies the test equipment, sample preparation, test steps, test results and calculations for bending test. This standard applies to bending test of cables for fixed laying. The general provisions, definitions and regular calibration of test equipment for mechanical and physical properties test of wires and cables are stipulated in GB/T29S1.1112 Applicable standards
GB/T2951.94 General rules for mechanical and physical properties test of wires and cables 3 Test equipment
Sample according to.
4 Sample preparation
The cable to be tested is used as the sample, and its length should be able to circle at least on the first diameter of the cylinder specified in the standard. 5 Test steps
5.1 The bending test shall be carried out at 20+5℃ or at the temperature specified in the relevant standards. 5.2 The height of the test cylinder shall comply with the table or relevant standards. 5.3 The test specimen shall be wound around the test cylinder at a high speed for one full circle, and the operation time shall not be less than 10s. Then the test cylinder shall be straightened and bent repeatedly in the opposite direction, with the inner straight line as one bend. 5.4 Unless otherwise specified in the relevant standards, in general, the intelligent sheathed cable shall be bent twice, and other non-aluminum sheathed cables shall be bent once. www.bzxz.net
Approved by the State Bureau of Technical Supervision on July 7, 1994 and implemented on January 1, 1995
Sheath type
Sheath corrugated sleeve
Non-gold sheath
35kV and above
25(D+d)
30(D+d
GB/T 2951.23—94
Diameter of cylinder tnun±5%
Power cable
Below 35kV
15(#+d)
25(0+d)
20(Da)
20(n+d)
18(2.15+d)
15(n+a)
Other cables
Note: (1) LD) is the nominal outer diameter of metal sheath or the nominal outer diameter of non-metal sheathed cable, and for split-phase lead sheathed cable, it also refers to the nominal outer diameter of the lead sheath of the core only, tum: d is the nominal diameter of the main conductor, mm. If the earth conductor is not round, the following formula is used to convert d=1.13 Vs
The nominal cross-sectional area of ​​the main conductor, mm.
Where. 5.3
d Main conductor diameter obtained by changing the sample. mm
6 Measurement results and calculations
The test results shall comply with the provisions of relevant cable product standards. Additional remarks:
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Cable Research Institute of the Ministry of Machinery Industry. The main drafter of this standard is Xu Yinglin.
This standard was first issued in 1982 and revised for the first time in July 1994.
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