Today, we got a canned motor pump driven by a frequency converter. The operating column ammeter showed 30 currents, but the terminal of the frequency converter showed more than 90 currents,
A 10kV system supplies power to the load through the distribution line, the power source reactance X=0.12 Ω, the line length=10km, and the line unit length
For the construction of embedded parts for equipotential and grounding of self built houses, I simply drew a sketch. I don't know whether it is correct. Please consult the teacher Fu
The household single-phase blower starts directly, the fan blade does not rotate, and there is a sound of Wenweng. The rotor bearing moves normally. If you use your hand before starting
