systemy-bezpieczenstwa: Circuit breaker

Evidence: 100 • authority: 72

A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by current in excess of that which the equipment can safely carry (overcurrent). Its basic function is to interrupt current flow to protect equipment and to prevent fire. Unlike a fuse, which interrupts once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation. Circuit breakers are commonly installed in distribution boards. Apart from its safety purpose, a circuit breaker is also often used as a main switch to manually disconnect ("rack out") and connect ("rack in") electrical power to a whole electrical sub-network.…

Evidence: 54 • authority: 72

A residual-current device (RCD), residual-current circuit breaker (RCCB) or ground fault circuit interrupter (GFCI) is an electrical safety device, more specifically a form of earth-leakage circuit breaker, that interrupts an electrical circuit when the current passing through line and neutral conductors of a circuit is not equal (the term residual relating to the imbalance), therefore indicating current leaking to ground, or to an unintended path that bypasses the protective device. The device's purpose is to reduce the severity of injury caused by an electric shock. This type of circuit interrupter cannot protect a person who touches both circuit conductors at the same time, since it then…

Evidence: 45 • authority: 72

A high-voltage circuit breaker is designed to make, carry, and interrupt electric currents under its rated voltage. The rated voltage is "the maximum system voltage for which the equipment is designed," according to the definition given by the International Electrotechnical Commission (IEC). According to the IEC., a high-voltage circuit breaker operates both: under normal operating conditions, for example, to connect or disconnect a power line in an electrical network; under specified abnormal conditions, particularly to clear a short circuit on the network caused by lightning (see also the specific section) or other causes. Because of its characteristics, a circuit breaker is the essential…

Evidence: 42 • authority: 80

Evidence: 42 • authority: 80

Evidence: 42 • authority: 72