Global Patent Index - EP 1034553 A1

EP 1034553 A1 20000913 - CIRCUIT FOR MONITORING AN ALTERNATIVE CURRENT POWER SWITCH

Title (en)

CIRCUIT FOR MONITORING AN ALTERNATIVE CURRENT POWER SWITCH

Title (de)

SCHALTUNG ZUR ÜBERWACHUNG EINES WECHSELSTROMSCHALTERS

Title (fr)

CIRCUIT DE SURVEILLANCE D'UN COMMUTATEUR A COURANT ALTERNATIF

Publication

EP 1034553 A1 20000913 (DE)

Application

EP 98961142 A 19981106

Priority

  • EP 98961142 A 19981106
  • EP 9807086 W 19981106
  • EP 97120590 A 19971125

Abstract (en)

[origin: EP0920038A1] The circuit uses a digital component output signal associated with one input to determine whether switch is closed and diode and resistor intact or switch is open. The switch (2) has one connection to one voltage phase (P) and another to the circuit input (4). The input is connected via a diode (9) and first resistor (10) to a high impedance input of a first digital component (12). The high impedance input of the digital component is connected via a second resistor (13) to the output of a second digital component (15), whose output, after a delay, is either connected to the null point (N) of the mains voltage or outputs a voltage greater than the threshold level for the first digital component's input. The signal on the output associated with one input is used to determine whether the switch is closed and the diode and second resistor intact or the switch is open.

IPC 1-7

H01H 9/16

IPC 8 full level

H01H 9/54 (2006.01); H01H 9/16 (2006.01)

CPC (source: EP KR US)

H01H 9/16 (2013.01 - KR); H01H 9/167 (2013.01 - EP US)

Citation (search report)

See references of WO 9927552A1

Designated contracting state (EPC)

CH DE FR GB IT LI NL SE

DOCDB simple family (publication)

EP 0920038 A1 19990602; CN 1139950 C 20040225; CN 1279820 A 20010110; DE 59803231 D1 20020404; EP 1034553 A1 20000913; EP 1034553 B1 20020227; JP 2002501279 A 20020115; JP 4063494 B2 20080319; KR 20010015834 A 20010226; PL 191165 B1 20060331; PL 340697 A1 20010226; RU 2196370 C2 20030110; US 6486647 B1 20021126; WO 9927552 A1 19990603

DOCDB simple family (application)

EP 97120590 A 19971125; CN 98811231 A 19981106; DE 59803231 T 19981106; EP 9807086 W 19981106; EP 98961142 A 19981106; JP 2000522603 A 19981106; KR 20007005577 A 20000522; PL 34069798 A 19981106; RU 2000116273 A 19981106; US 48685100 A 20000517