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A fuse is an automatic means of removing power from a faulty system, often abbreviated to ADS (automatic disconnection of supply). Circuit breakers can be used as an alternative to fuses, but have significantly different characteristics.
An open-circuit fault occurs if a circuit is interrupted by a failure of a current-carrying wire (phase or neutral) or a blown fuse or circuit breaker. In three-phase systems, a fault may involve one or more phases and ground, or may occur only between phases. In a "ground fault" or "earth fault", current flows into the earth.
In electrical distribution, a fuse cutout or cut-out fuse (often referred to as a cutout) is a combination of a fuse and a switch, used in primary overhead feeder lines and taps to protect distribution transformers from current surges and overloads. An overcurrent caused by a fault in the transformer or customer circuit will cause the fuse to ...
Diagram of an installed DIAZED fuse DIAZED fuse element D II (right) and screw cap. D-type (Diazed, from German "Diametral abgestuftes zweiteiliges Edisongewinde" for "diametrically graded two-part Edison thread") fuse cartridges have a bottle-shaped ceramic body with metal end caps and are used with screw-in fuse holders.
A residual-current device (RCD), residual-current circuit breaker (RCCB) or ground fault circuit interrupter (GFCI) [a] is an electrical safety device that interrupts an electrical circuit when the current passing through a conductor is not equal and opposite in both directions, therefore indicating leakage current to ground or current flowing to another powered conductor.
An earth-leakage circuit breaker (ELCB) is a safety device used in electrical installations with high Earth impedance to prevent shock. It detects small stray voltages on the metal enclosures of electrical equipment, and interrupts the circuit if a dangerous voltage is detected.
In electric power distribution networks, a fault indicator is a device which provides visual or remote indication of a fault on the electric power system. Also called a faulted circuit indicator (FCI), [1] the device is used in electric power distribution networks as a means of automatically detecting and identifying faults to reduce outage time.
2009-07-27 18:55 Hydrargyrum 485×726 (4521 bytes) Changed symbol stroke weight from 5 px to 8 px; 2009-07-27 18:36 Hydrargyrum 485×726 (4598 bytes) {{Information |Description = Basic fuse symbols, per IEC and IEEE/ANSI standards |Source = I (~~~) created this work entirely by myself, based on ANSI Y32.2-1975, CSA Z99-1975 and IEEE Std. 315-1975 |Date = 27 July 2009 |Author