Power cable YJV22-8.7 / 15kv-3 * 300 what meaning
Power cable YJV22-8.7 / 15kv-3 * 300 Meaning: refers to the copper core XLPE insulated double steel tape armored PVC sheathed power cable, cable rated working voltage 8.7 / 15KV, cable for the three-core, single Conductor cross-sectional area of 300mm2. YJ: cross-linked polyethylene insulation V: PVC sheathed 22: steel tape armor 8.7 / 15KV: rated working voltage 8.7 / 15 kV 3 * 300 Specifications: YJV22-8.7 / 15kv-3 * : Three conductors, single cross section of 300 square feet.
National norms are strictly prohibited, but in practice it is difficult to distinguish between personal experience: 1. Power supply AC380 above, absolutely can not be with the signal line control line with the laying; 2. Power load in the variable frequency load is not Can be; 3. AC. AC110 no problem, but may interfere with the monitoring of video images, the signal line must choose shielded cable single-ended ground, the signal is not affected, no problem; 4 encountered this situation, the general control cable, Line in the same pipe laying, power cable to choose a separate pipe laying. If the scene allows, be sure to strictly abide by the procedures to facilitate the completion of acceptance later. Use UPVC ,, that must be buried, the use of plastic pipe in general play two roles: 1. Waterproof 2. to prevent false digging. Plastic pipe can not play a shielding effect, so you must be the power line and the other separated, the best interval of a certain distance, or power lines choose armored cable.
(Including the insulation layer) of the total area should not be greater than 40% of the internal cross-section; . the tube wire is not allowed to have joints and twist the phenomenon; . the same loop of the phase of the wire, Regardless of the number of roots should be penetrated into a tube, and different circuits and different voltage lines are not allowed to wear a tube, AC and DC line wires shall not wear a tube, a phase line are not allowed to penetrate alone Steel Pipe. If the requirements are not strict, the power cable, the control cable can wear the same tube; but the signal line will be discretionary, although the signal line is shielded cable, but in order to maximize the signal transmission quality, and other signal lines are generally layout. UPVC plastic pipe with excellent insulation, acid, corrosion resistance, many chemical plants used as infusion piping. The other is also used for sinking engineering, medicine piping works, mineral salt water piping works, electrical piping works. Also widely used as a telecommunications cable. So it can be UPVC pipe to do electrical piping. As for the galvanized steel pipe is not necessary. If the power cable and signal cable at the same time with UPVC pipe laying, were classified separately perforated, the best interval between the two 20cm to prevent interference, with galvanized steel pipe pipe is not necessary so care.
Strictly speaking is not in line with the norms. Special signal lines may be subject to interference
