Patent FR2294571A1 successfully refreshed from Google Patents.
FR2294571A1
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Short cct. detector - protected DC line shunted, current growth measured against time
Assignee: Regie Autonome des Transports Parisiens
•
Filing: 1974-12-13
•
Granted: —
•
Expires: 1994-12-13
Abstract
Abstract A short circuit detector employs a method which involves shunting a D.C. line which is to be protected. The shunt signal is then passed through an amplifier (2), a filter (3) and a detector (4). The detector is an operational amplifier whose function is to measure the growth of the current within a given interval of time. The output of the detector goes into a comparator which has a defined threshold. When the output signal of the detector is greater than the threshold signal, a relay is energised disconnecting the original supply line. For an A.C. line, the shunt signal needs to be rectified.
Inventors
- 👤 Jean-Pierre Castex
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-30 12:02
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/44; H02H3/445
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.