Low-voltage cable in the AC power system, the cable line impedance is present. Impedance of the resistance, reactance constituted. When the current through the impedance, the impedance of the voltage difference generated at both ends of the voltage drop is called. Cable voltage loss means the beginning of the line voltage by the line transmission, the loss of the line or influence its size, is the difference between the value of the voltage across the line, used its rated voltage compared to the same percentage. Low-voltage cable lines, due to the low voltage, short circuit, a capacitor current can be ignored, so Longxian low voltage cable outlets, can only consider the inductive reactance, while medium voltage cable is different, it must also consider the capacitive current, namely capacitance size. Cable length l in three-phase current systems, low-voltage cables to the current I (rms set its Ibe) an insulated wire core (A) work, its effective resistance per unit length of R0 (Ω / km) and inductance per unit length of X0 (Ω / km). Its single-phase equivalent circuit diagram of the cable lines. Start end voltage cable lines for Uae, the terminal voltage of Ube. As in the horizontal direction relative to the amount of the terminal voltage Ube, set its initial phase to zero, as the reference. Due to low voltage cable capacitance charging current can be ignored, the cable is inductive load, low-voltage cables supply Qi, the current lags the voltage, Φ Ube voltage and load current I phase, cosΦ is load power factor. UR-phase voltage and current at both ends of the cable on the effective resistance R0, and reactance voltage leads the current X UL 90 ends. Cable fire prevention measures (1) selection of thermal stability to meet the requirements of the cable. Choice of cable, under normal circumstances, be able to meet long-term requirements of the rated load of fever, under short circuit conditions, to meet the short-term thermal stability, to avoid overheating of the cables caught fire. (2) to prevent running overload. Cable with load operation, low voltage cable Hancheng wholesale, generally do not exceed the rated load operation, if the overload operation, should strictly control the overload operation time of the cable, so as not to overload the heating of the cable fire. (3) comply with the relevant provisions of cabling. (4) regular visits to check. For power cables should be regular visits to check on a regular basis in the cable trench measuring air temperature and cable temperature, in particular, to make a record large-capacity power cables and cable splice case temperatures. Detect and deal with deficiencies through inspection. (5) tightly enclosed cable, holes and set fire doors and partitions. (6) Remove the non-appearance of jute buried cable outer sheath. (7) to keep clean and proper ventilation cable tunnel. (8) holding the cable tunnel or channel with good lighting. Middle East cable, power cable gold (Figure) _ _ Longxian low voltage cable direct low-voltage cables provided by Cable Co., Ltd. Shaanxi Baoli. Shaanxi Baoli Cable Co., Ltd. (www.jinlidl.com) (www.jinlidl.cn) is a professional, "Wire and Cable, the Middle East cable, gold power cables," the company. Since its inception, we adhere to the "good faith, sound management" approach, the courage of healthy competition in the market, so that the "golden power cables, the Middle East and cables," the brand has a good reputation. We adhere to the "service first, customer first" principle, the Middle East and cable, power cable Kim won the customer's trust in the power cable in the congregation, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!