| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Earth fault protection | Mining | A system of protection designed to cause the supply to a circuit or system to be interrupted when the leakage current to earth exceeds a predetermined value. Also called earth leakage protection. (references) | |
| Restricted earth fault protection | Mining | As used in mining, a system of earth fault protection in which the fault current is limited, without requiring the use of sensitive earth fault protection. (references) | |
| Sensitive earth fault protection | Mining | A system of earth fault protection in which the fault current is limited by design to a low value which generally requires amplification in order to operate an earth fault relay. In the case of three-phase alternating-current systems, the limitation of the leakage current may be effected by either (1) inserting a current-limiting device between the neutral point of the system and earth (single-point earthing), or (2) connecting, in each circuit to be protected, all phases, in star, through current-limiting devices, each star point being connected to earth through an earth leakage protective device (multipoint earthing). (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
