Beabsichtigter Kurzschluss

Description: An electrical short-circuit is a virtually Resistance-free connection between two poles (or two points with different potentials) of a voltage source. A short-circuit causes the voltage between the relevant points to drop to virtually zero. If the voltage source is active, the low resistance results in an extreme current flow. A distinction is made between unintentional (accidental) and intentional (deliberate) short-circuits. In the case of an unintentional short-circuit, the current reaches many times the level of the operating current because it is limited only by the internal resistance of the voltage source and the Conductor resistance. This high current would damage the wiring in electrical installations, so it needs to be protected using appropriate overcurrent protective devices. An intentional short-circuit is used as a protective measure during maintenance Work. Once an electrical installation has been switched off, the phase conductors are short-circuited with the earth potential. This can prevent electrocution if the installation is accidentally switched on again.