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Commonly used terms in the Electrical industry.
time-current characteristic curve
(1) a relay time-current curve is a curve showing the time versus current characteristic of a time overcurrent (TOC) relay.
(2) a fuse time-current curve shows the melting and clearing times of a given fuse or family of fuses.
(3) a coordination time-current curve shows the relationship of the operating and clearing characteristics of coordinating devices (TOC relays and fuses) on a power system.