Drafting unit:Shanghai Cable Research Institute of the Ministry of Mechanical and Electronic Industry, Fushun Branch of the General Institute of Coal Science and Technology and other units
Focal point unit:National Technical Committee for Standardization of Wires and Cables
Proposing unit:Ministry of Mechanical and Electronic Industry of the People's Republic of China
Publishing department:State Bureau of Technical Supervision
competent authority:China Electrical Equipment Industry Association
This standard specifies the product varieties, technical requirements, test methods and inspection rules for miner's cap lamp wires. This standard applies to mining copper core rubber insulated leather sheathed lamp wires. This standard should be used together with GB 12972.1. GB 12972.10-1991 Mining rubber sheathed flexible cables Part 10: Miner’s cap lamp wires GB12972.10-1991 Standard download and decompression password: www.bzxz.net
Some standard content:
National Standard of the People's Republic of China Miner's cap lamp cords and scope of application This standard specifies the product varieties, technical requirements, test methods and inspection rules for miner's cap lamp wire products. This standard applies to mining copper core rubber insulated rubber sheathed cap lamp wires. This standard should be used together with GB12972.1. 2 Usage characteristics 2.1 The working voltage is DC 5V. 2.2 The long-term allowable operating temperature of wire conductors is +165°C. 3 model 3.1 cable model is shown in Table 1. Table 1 Type No. UM UM-1 3.2 Name Miner's Hat Lamp Wire Miner's Hat Lamp Wire The cable type is shown in Figure 1. weigh use GB12972.10-91 instead of GB1170-74 for various acids and alkalis Miner's lamp. The sheath does not have combustion resistance and is used for various acid and alkaline miner's lamps. The sheath has combustion resistance 3 Figure 1 1—conductor; 2—insulation; 3—reinforced core; 4—sheath. Approved by the National Technical Supervision Bureau on 1991-06-06 and 1992-03- 01Implementation 4 Specifications Cable specifications should comply with Table 2. Number of cores Number of roots/single wire nominal diameter 42/0.15 70/0.15 GB12972.10--91 Table 2||tt| |Insulation thickness 0.4 0.5 5.1 The technical requirements of cables should comply with Table 3. 5.2 Conductors 5.2.1. Single wires in conductors are allowed to be tinned. Nominal thickness of sheath 1.2 1.3 5.2.2 The stranded pitch diameter ratio of the cabled stranded conductors should not be greater than 30. 5.3 Insulation Cable Outer diameter UM, UM-1 minimum 6.9 8.2 maximum 7.5 8.8 5.3.1 The insulation uses natural rubber as the base material, and its performance should comply with the provisions of Appendix A of this standard. 5.3.2 The thickness of the thinnest point of the insulation should not be less than 90% of the specified thickness minus 0.2mm. 5.3.3 Before stranding, the insulated wire core should withstand the power frequency AC spark voltage test with a voltage of 2000V. 5.4 Cable core 5.4.1, the strengthening core is located in the center of the cable core, the cable core stranding pitch should not be greater than 13mm, and the stranding direction is right. 5.4.2 The tensile breaking force of the reinforced core should not be less than 196N. 5.4.3 The cable core is allowed to be covered with an isolation layer, which can be paper tape or tape of suitable material. 5.5 Sheath mm Conductor resistance at 20℃ 2/m maximum value 0.042 0.025 5.5.1UM type The wire rubber sheath should comply with the XH-00A regulations in GB7594.4, and the UM-1 wire rubber sheath should comply with the XH-01A regulations in GB7594.5. 6 Test and inspection rules Products are tested according to Table 3. Table 3 Serial number 1.1 1.2 1.3 1.4 1.5 Project name Structural dimensions Conductor Insulation thickness Cable core Sheath thickness Wire outer diameter Technical requirements Article 5.2 and Table 2 of this standard Article 5.3.2 of this standard Article 5.4 of this standard Article 8 of GB12972.1 and Table of this standard 2 Table 2 of this standard Test type T,s T,s T,s T,s| |tt||T,s Test method GB4909.2 GB2951.2bZxz.net Hanging visual inspection GB2951.3||tt ||GB2951.4 Serial number 2 2.1 2.2 2.3 2.4 2.5||tt ||2.6 3 4 Project name Wire performance Conductor resistance Power frequency AC Voltage Test Burning test Insulation physical machinery Performance Sheath physical machinery Performance Reinforced core tensile test||tt| |Identification mark Delivery length Table 2 of this standard GB 12972.10-- 91 Continuation of Table 3 Technical requirements Test length is 10 m Immersion time 1h Water temperature 20±5℃ Voltage/time 500V/5min GB12972.1 Article 11.6 Article 5.3.1 of this standard Article 5.5.1 of this standard Article 5.4.2 of this standard GB12972.1 Article 10 GB12972.1 Article 11.12 Note: ①$ means regular testing, which should be conducted at least once a year. ②Item 2.3 does not apply to UM type wires. Test type T,s T,St T,St T,st T,st||tt ||T,St T,St R Test method GB3048.4 GB3048.8 GB12666.2 GB2951 GB2951 GB2951.6 GB6995 meter counter serial number 1||tt| |1.1 1.2 2 2.1 2.2 2.3 2.4 Sample before aging||tt ||Tensile strength Elongation at break Air box thermal aging test Test temperature Test time Tensile strength||tt| |Change rate of tensile strength Elongation at break Change rate of elongation at break Additional notes: GB12972.1091 Appendix A| |tt||Rubber insulation performance requirements (supplement) Table A1 Test items Minimum value Minimum value Minimum value Maximum value Maximum value Minimum value This standard is proposed by the Ministry of Mechanical and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Shanghai Cable Research Institute of the Ministry of Mechanical and Electronic Industry. MPa % ℃ h MPa % % % 4.5| |tt||200 Indicator 75±2 10×24 4.2 ±40 200||tt| | ±40 | Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.