Global Patent Index - EP 3224922 A1

EP 3224922 A1 2017-10-04 - TEST CIRCUIT FOR A RESIDUAL CURRENT CIRCUIT BREAKER

Title (en)

TEST CIRCUIT FOR A RESIDUAL CURRENT CIRCUIT BREAKER

Title (de)

PRÜFSCHALTUNG FÜR FEHLERSTROMSCHUTZSCHALTER

Title (fr)

CIRCUIT DE TEST POUR DISJONCTEUR DE COURANT RÉSIDUEL

Publication

EP 3224922 A1 (EN)

Application

EP 15818042 A

Priority

  • IT RM20140693 A
  • IB 2015058879 W

Abstract (en)

[origin: WO2016083940A1] A test circuit (20) for a residual current circuit breaker (10) is described, the residual current circuit breaker (10) being adapted to pass from a closed state to an open state to interrupt a neutral branch circuit (1, 11) and a phase branch circuit (2, 12) upon detection of a leakage current, wherein the test circuit (20) is adapted to be fed by a mains voltage supplied by the phase and neutral circuit branches. The test circuit (20) comprising: - a first input circuit node (Nl) electrically connected, or adapted to be electrically connected, to the neutral branch circuit (1, 11); - a second input circuit node (N2) electrically connected, or adapted to be electrically connected, to the phase branch circuit (2, 12); - a test resistance (Rtest); a test switch (C3) operable by means of a test button (21) to connect the test resistance (Rtest) between the first (Nl) and the second (N2) circuit node so as to simulate a leakage current; - an electronic control circuit (22) configured to be fed by the neutral circuit branch and by the phase circuit branch and comprising an electronic time counter adapted to vary and store a time count value and reset it upon pressing of the test button (21); - an optical or acoustic signalling device (D5) controlled by the electronic control circuit (22) for providing an acoustic and/or optic signal upon reaching a given time count value by the electronic time counter. The electronic time counter comprises a volatile memory adapted to store said count value and the electronic control circuit (22) comprises a non-volatile memory and is programmed to periodically copy into the non-volatile memory the time count value stored in the volatile memory.

IPC 8 full level (invention and additional information)

H02H 3/33 (2006.01)

CPC (invention and additional information)

H02H 3/335 (2013.01)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

EPO simple patent family

WO 2016083940 A1 20160602; CN 107005043 A 20170801; EP 3224922 A1 20171004

INPADOC legal status


2017-10-04 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20170412

2017-10-04 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

2017-10-04 [AV] REQUEST FOR VALIDATION OF THE EUROPEAN PATENT IN

- Countries: MA MD

2017-10-04 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Countries: BA ME