The most commonly used unit in electrical work is the "4-phase voltage and 3-phase current" unit. Since other units are basically the same in usage, we can focus on understanding the functional features of the "4-phase voltage and 3-phase current" unit: Feature 1: This unit can flexibly control the output of 4-phase voltage and 3-phase current, 6-phase voltage, 6-phase current, and 12-phase simultaneous output in various combinations; Feature 2: It has a sequence component output function, allowing direct setting of sequence component values and automatically combining them into each phase voltage and current output, while also performing variable output according to sequence components; Feature 3: The amplitude and phase of each phase voltage and current output can be arbitrarily set, with the amplitude having an upper limit; Feature 4: The amplitude, phase, and frequency of each quantity can be set with variations, and the step size can also be arbitrarily set; Feature 4: Multiple output mode combinations can be set, and arbitrary number setting is possible; Feature 5: During output, it can switch between full automatic, semi-automatic, and manual modes; Feature 6: In the output state, the amplitude, phase, step size, and the number of variables can be directly modified; Feature 7: The power value for calibrating power metering instruments can be directly displayed; Feature 8: The action value, return value, action time, and return time can all be measured.
