Switchgear has overload and short circuit. Short-circuit current is an overcurrent caused by a short circuit due to a fault or wrong connection in the circuit. Overload current is an overcurrent caused by operating conditions in an undamaged circuit.Every electrical device used in the power grid or

(1) The matching relationship between the performance of lubricating grease and the operating conditions of the motor. In the technical conditions of the motor, the standard operating environment of the motor will be specified, such as ambient temperature, altitude, etc. When selecting lubricating g

I.Characteristics of transformer excitation inrush current(1) The waveform presents a pointed shape, indicating the presence of significant non periodic components and second and third harmonic components. Over time, the second harmonic content of a certain phase may exceed half of the fundamental c

When a power transformer is working normally, the transformer core and clamps are usually grounded at one point. If there are two or more grounding points on the iron core or clamping components, a closed circuit is formed between the two points. Under the action of the transformer leakage magnetic