Industrial electricity (380V) what the color of the wire, which is the line of fire, which is the zero line
30KW current about 60A or so, calculated by P = ui to calculate, mainly to consider the line voltage and phase voltage conversion, 380V should be replaced by phase voltage.
? 60A of the meter generally do not have to consider the installation of a more current transformer, 75 / 5A on the line, so that the secondary current in the 4 amps, the meter with 5A on the line, calculate the power when remember to multiply 15 times.
380 three-phase four-wire, yellow green red on behalf of ABC three FireWire, zero line is generally blue or black, ground line is yellow and green line
Zero line of fire: zero line Fire line refers specifically to the power supply lines, electricity supply voltage of 220 volts (V). It includes a zero line [N] and a fire line [L], zero line ground (ground is zero) so called the zero line. FireWire, is the circuit power transmission line. Zero line, mainly used in the working loop, from the transformer neutral point after grounding lead the main line.
