FIELD: electrical engineering. SUBSTANCE: device is resigned for protection of factory-assembled switch-gears against external and internal short-circuits accompanied by electric arcs. Device integrates function of logic differential protection of buses. It is supplemented with unit for detection of arc short-circuit. Principle of operation of unit is based on control over voltage across arc and its harmonic components. EFFECT: improved efficiency of protection. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| CENTRALIZED ARC PROTECTION DEVICE FOR CUBICLE-TYPE ELECTRICAL INSTALLATIONS | 1992 |
|
RU2024149C1 |
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SU1432660A1 |
