What is YJV cable?
What does the model mean?
YJV cable is a commonly used copper cable model, but many users still do not know the YJV cable model specifications, do not know how to choose the cable model; The following is to introduce the YJV cable model specifications, YJV copper core crosslinked polyethylene insulated power cable and other related knowledge.
First, What is YJV cable
Most of the commonly used copper cable models need to use YJV cables for power supply, but some projects have increased flame retardant and fire-resistant cables; There are different models such as: WDZN-YJV, ZA-YJV, ZB-YJV, ZC-YJV, KYJV, YJV22, NA-YJV, WDZBN-YJV and so on.
YJV Cable model Meaning:
1, use code - not marked as power cable, K-(control cable), P-(signal cable)
2, conductor material code - not marked as copper (can also be marked as CU), L-(aluminum)
3, the inner sheath code -Q-(lead), L-(aluminum), H-(rubber), V-(polyvinyl chloride sheath), the inner sheath is generally not identified.
4, the outer cover code -V-(polyvinyl chloride), Y-(polyethylene power cable)
5, derived code -D-(non-dripping), P-(dry insulation)
6, special product code -TH-(hot and humid zone), TA-(dry tropical zone), ZR-(flame retardant), NH-(fire resistance), WDZ-(low smoke halogen-free, enterprise standard).
The core of YJV cable mainly includes single core, 2 core, 3 core, 4 core, 5 core, 3+1, 3+2, 4+1. 3+1 represents 3 phase wires and 1 ground wire, 3+2 represents 3 phase wires and 2 ground wires, and 4+1 represents 4 phase wires and 1 ground wire.
It is expressed as: three 185 square phase lines and one 95 ground cable
Second, YJV cable conditions and precautions:
Different types of YJV cables have different usage characteristics, and the power frequency rating of UO/U is 0.6/1KV.
YJV cable allows long-term high operating temperature of 90℃. When short circuit occurs (5s or less), the conductor temperature does not exceed 250 ° C. The ambient temperature should not be lower than 0 ° C when the cable is laid.
YJV single-core cable bending radius: not less than 15 times the cable diameter, multi-core cable not less than 10 times the cable diameter.
Special tools, such as pay-off stand and guide roller, should be used for cable laying to prevent mechanical damage and keep away from heat sources during laying
When cables are routed through pipes, the inner diameter of the pipes should not be less than 1.5 times the outer diameter of the points. Do not squeeze the cables when multiple cables are routed through pipes. The total area of the cables should not exceed 40% of the total area of the pipes.
