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Patent Searching and Data


Title:
DIFFERENTIAL PROTECTION DEVICE WITH FIRE BREAK FUNCTION
Document Type and Number:
WIPO Patent Application WO/2017/072442
Kind Code:
A3
Abstract:
The present invention relates to a differential protection device allowing the detection of a leakage current or default current in an electrical installation supplied by at least one phase conductor forming the primary winding of a toroidal core (T), the signal induced at the secondary winding (S) of said toroidal core (T) when a differential default appears at the primary winding being used in at least one suitable signal processing stage (ETS) of said device, in order to control a relay (MC) of the device if a predefined threshold value is exceeded, said stage(s) (ETS) being directly or indirectly connected to the terminals of the secondary winding (S) under consideration.The device is characterized in that it comprises at least one circuit RC made up of a first resistance (R) having a defined value and a first capacitance (C) having a defined value, which are arranged in series, said circuit RC being connected to the terminals of the secondary winding (S) and mounted in parallel and upstream of the signal processing stage(s) (ETS).

Inventors:
CHETOUANI HICHEM (FR)
Application Number:
FR2016/052776
Publication Date:
June 22, 2017
Filing Date:
October 25, 2016
Export Citation:
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Assignee:
HAGER-ELECTRO SAS (SOCIÉTÉ PAR ACTIONS SIMPLIFIÉE) (FR)
International Classes:
H02H3/33; H02H3/00; H02H9/02; H02H9/04
Foreign References:
DE19937061A12001-02-08
Attorney, Agent or Firm:
NUSS, Laurent (10 rue Jacques Kablé, Strasbourg Cedex, FR)
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