electricalscho

Refers to a transformer that is connected Delta on the primary side and Wye on the secondary.

The time required for dispersion of ionized air after a fault is cleared so that the arc will not re-strike on re-energization.

Withdrawal of 50% or more of the rated capacity of a cell or battery.

Free from any electrical connection to a source of potential difference and from electrical charge. A circuit is not truly de-energized until protective grounds have been installed.

A logarithmic mathematical ratio that indicates a devices electric or acoustic signal to that of another