When a power or a distribution transformer is first put into operation, a phenomenon called excitation inrush current occurs. Although this inrush current is generally not as destructive as fault currents, the duration of excitation inrush currents is approximately seconds, compared to cycles with fault currents. The frequency of excitation inrush current is much higher than […]

Power transformer differential protection is the main protection for powers transformers, using the principle of circulating current. Differential protection can quickly and selectively activate short-circuit protection in the event of phase to phase short circuit faults in transformer windings, outgoing lines, and single-phase turns.   The basic requirements for transformer differential protection are as follows:

Due to different voltage level, it has several types of power cable termination; in this post, we are only focusing on 35 kV medium voltage power cable termination and how to make it, which will include the following contents. what is a power cable termination and its main features standard reference for power cable termination