Search results
Results from the WOW.Com Content Network
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.
To eliminate this confusion, the IEC decided to apply the term residual current device (RCD) to differential-current-operated ELCBs. Residual current refers to any residue when comparing current in the outbound and return currents in the circuit. In a single phase circuit this is simply the live or phase current minus the neutral current.
Breakers for protections against earth faults too small to trip an over-current device: Residual-current device (RCD), or residual-current circuit breaker (RCCB) — detects current imbalance, but does not provide over-current protection. In the United States and Canada, these are called ground fault circuit interrupters (GFCI).
Category for standard protection devices fitted to commercial or domestic electrical supplies, to monitor leakages to earth, which cause a subsequent over-current Pages in category "Over-current protection devices"
Over-current protection devices (12 P) Pages in category "Safety switches" ... Residual-current device; S. Scram; Sifa; Sulfur hexafluoride circuit breaker; T ...
This type of consumer unit was very popular in Britain until 2001 when wiring regulations mandated residual-current device (RCD) protection for sockets that could "reasonably be expected to" supply outdoor equipment (BS 7671:2001, ISBN 0-86341-373-0). There were a number of similar designs from other manufacturers but the Wylex ones are by far ...
Busy is in it for 1951 a residual current circuit breaker of the company protection devices Society & Co. mbH. KG, Schalksmuehle / Westphalia. (Schupa) with the trade name cobweb , [26] which was designed in two-, three-and four-pole version for a nominal current of 25 A and voltages up to 380 V with a tripping fault current of 0.3A.
In the case of a TT system where the impedance is high due to the lack of direct connection to the transformer neutral, a residual-current device (RCD) must be used to provide disconnection. RCDs are also used in other situations where rapid disconnection of small earth faults (including a human touching a live wire by accident, or damage) is ...