1、 Product execution standard: Enterprise standard:
2、 The description of fire-resistant wires and cables refers to cables that can maintain normal operation under specified test conditions and burn in flames for a certain period of time.
(1) According to the standard requirements of GB/T19216-2003 "Line integrity test for cables or optical cables under flame conditions", fire-resistant wires and cables must be ignited at 750 ℃ for 90 minutes without melting the 2A fuse.
(2) Fire resistant wires and cables use high-temperature resistant organic fire-resistant tape as the fire-resistant layer. According to GB/T19666-2005, fire-resistant wires and cables can be divided into flame-retardant and fire-resistant wires and cables and non flame-retardant and fire-resistant wires and cables. Flame retardant and fire-resistant wires and cables can meet the flame retardant characteristics by adding flame retardants to the insulation or sheath. Non flame retardant and fire-resistant wires and cables do not have flame retardant properties when flame retardants are not added to the insulation or sheath.
(3) According to the test conditions specified in GB/T18380.3-2002, flame retardant wires and cables are divided into four levels: A, B, C, and D.
3、 Main performance:
l. The finished cable should undergo a voltage test of 3500/5 minutes.
2. The long-term working temperature of the cable conductor shall not exceed 7O ℃.
3. The ambient temperature for laying cables shall not be lower than 0 ℃.
4. The small bending radius of the cable should be: for cables with steel strip armor structure, it should not be less than I2 times the outer diameter of the cable, and for flexible cables with steel wire shielding layer structure, it should not be less than 8 times the outer diameter of the cable.
4、 Model Name: Copper Core Aluminum Core:
VVP ZR-VVP
VLVP ZR-VLVP PVC insulated PVC sheathed shielded power cable (including flame-retardant type)
YJVP ZR-YJVP
YJLVP ZR-YJLVP cross-linked polyethylene insulated polyvinyl chloride sheathed shielded power cable (including flame-retardant type)
VVP22 ZR-VVP22
VLVP22 ZR-VLVP22 PVC insulated steel strip armored PVC sheathed shielded power cable (including flame-retardant type)
YJVP22 ZR-YJVP22
YJLVP22 ZR-YJLVP22 cross-linked polyethylene insulated steel strip armored polyvinyl chloride sheathed shielded power cable (including flame-retardant type)
1. Add ZR before the regular power cable model for flame-retardant cable models
2. For fire-resistant cable models, add NH before ordinary cable models
5、 VVP cables are suitable for transmitting electrical energy in power lines with a rated voltage of 0.6/1kV and below. VVP copper wire braided shielded cable has strong resistance to electromagnetic interference, lightning strikes, and uniform electric field, improving power supply quality. It is particularly suitable for places with precision electronic devices, such as computer centers, aerospace monitoring centers, intelligent buildings, etc. VVP cable structure description: 1. Conductor 2, PVC (XLPE) insulation 3. Wrapping 4. PVC inner sheath 5. Metal shielding 6. PVC outer sheath metal shielding power cable VVP cable model description; Metal shielded power cables are only different from cross-linked polyethylene insulated power cables and polyvinyl chloride insulated power cables in terms of design structure. They are distinguished by the suffix "- P" in their models, such as VV-P, YJV-P, VVP22, YJVP22, and so on.
6、 Copper core PVC insulated and sheathed soft structure power cable, voltage level 0.6/1KV Using the fifth type of conductor according to the national standard, each copper wire has a diameter of around * * * and a relatively large number of wires, making it relatively flexible and suitable for frequently moving power lines.
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