Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by INSTITUTUL DE îNVATAMîNT SUPERIORfiledCriticalINSTITUTUL DE îNVATAMîNT SUPERIOR
Priority to RO111156ApriorityCriticalpatent/RO87118B1/en
Publication of RO87118A2publicationCriticalpatent/RO87118A2/en
Publication of RO87118B1publicationCriticalpatent/RO87118B1/en
Inventia se refera la un releu pentru protectia motoarelor asincrone trifazate la întreruperea unei faze de alimentare care se caracterizeaza prin aceea ca semnalul de iesire al puntii, printr-un condensator, este aplicat unui amplificator selectiv avand frecventa centrala de 100 Hz si banda de trecere îngusta urmat de un detector si un circuit de prag ce comanda releul ce actioneaza circuitul contactorului plasat între o faza si nulul retelei înaintea sigurantelor motorului.The invention relates to a relay for protection of three-phase asynchronous motors at the interruption of a feeding phase characterized in that the bridge output signal through a capacitor is applied to a selective amplifier having a central frequency of 100 Hz and narrow bandwidth followed by a detector and a threshold circuit that controls the relay acting on the contactor circuit between phase and neutral before the motor fuses.
RO111156A1983-06-031983-06-03Relay for power phase failure protection of asynchronous motors
RO87118B1
(en)