How the square of the cable and the current conversion
Power cable, also known as power cable, refers to the transmission of electrical energy cable, the control cable is the transmission of various control signals cable
Two hundred and fifty times multiplied by nine, go up by a straight to go. Thirty-five by 3.. both groups of five points. Conditions have changed, high temperature Jiujiang copper upgrade. Piercing the number of two hundred thirty-four, eight seven six fold full load. Note: This section of the formulas on a variety of insulated wire (rubber and plastic insulated wire) of the current (safety current) is not directly pointed out, but "cross section multiplied by a certain number" to express, through the mental arithmetic derived. As can be seen from Table . the multiple decreases with increasing cross-section. "2.5 points multiplied by nine, go up by a straight run" that is 2.5mm 'and below the various sections of aluminum core insulated wire, the carrying capacity of about 9 times the number of cross-section. Such as 2.5mm 'wire, carrying capacity of 2.5 × 9 = 22.5 (A). From the 4mm 'and above the conductor of the current and the number of cross-sectional number of the relationship is the number of lines along the line row, multiple times by . that is 4 × .6 × .10 × .16 × .25 × 4. "35 by 3.. both groups of five points," said the 35mm "wire carrying capacity of 3.5 times the cross-section, that is 35 × 3.5 = 122.5 (A). From 50mm 'and above the wire, the carrying capacity and the number of cross-sectional relationship between the two into a two lines into a group, multiple times in turn 0.5. That is, .70 mm' conductor carrying capacity of the number of cross-section 3 Times; .120mm "wire carrying capacity is the number of its cross-sectional area of ??2.5 times, and so on.
Control cable transmission is the signal, the current is relatively small (that is, the conductor cross-section is small), the voltage range is narrow (450/750 ~ 10KV), cable core number is more, from 2 core ~ 61 core, or even more Control cable also uses a variety of core structure, shielding and other measures to obtain a satisfactory electromagnetic compatibility
Power cable transmission continuous current, voltage range of a wide range (from 1KV to 220KV), the current larger (larger conductor), cable core number less, 3 core, 4 core (three-phase four-wire system) 5 core (three-phase five-wire system)
