CONTROLLER OF SWITCH

Title:

CONTROLLER OF SWITCH

Document Type and Number:

Japanese Patent JPS6356120

Kind Code:

A

Abstract:

1. Arrangement for controlling a remote-controlled switching device (2) in a polyphase network (L1, L2, L3) as a function of network status data, by means of an impedance measuring device consisting of a measuring voltage source (18), at least one current sensor (6 - 8, 14) and a switching arrangement (19), and in which case in the non-switched-on state of the switching device (2) the switching arrangement (19) switches the measuring voltage from the measuring voltage source (18) in series with the current sensor (14) and between the non-switched-on phases (3, 4, 5) of the network and earth (PE), the current sensor (14) detects the impedance of the non-switched-phases (3, 4, 5) to earth (PE) and feeds it to a processing stage (9), and the processing stage (9), in the event of a fall below a predetermined value of the impedance to earth, blocks the switching device (2) in the non-switched-on state, characterized in that in the non-switched-on state of the switching device the switching arrangement further switches over the measuring voltage from the measuring voltage source (18) in series with the current sensor (6 - 8) between the individual non-switched-on phases (3, 4, 5), the current sensor (6 - 8) detects the impedances between the individual non-switched-on phases (3, 4, 5) and feeds them to the processing stage (9) and the processing stage (9), in the event of a fall below a predetermined value of the impedance between the individual phases (3, 4, 5), blocks the switching device (2) in the non-switched-on state.

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Inventors:

RUUDORUFU DERUFUAA
KURUTO KURAUZE
GERUTO KUNMEROU
BUUDEUIN MEERUMAN
RUUDORUFU SHIYUNAABERU
GERUHARUTO SHIYUREETAA
RORUFU FUOIKUTO
GEORUKU WAITONAA
ROTAARU TSUENTOGURAAFU

Application Number:

JP28191484A

Publication Date:

March 10, 1988

Filing Date:

December 25, 1984

Export Citation:

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Assignee:

SIEMENS AG

International Classes:

H02H3/17; H02H7/08; H02H7/085; H02H11/00; (IPC1-7): H02H3/17; H02H7/085

Domestic Patent References:

JPS5788817A	1982-06-02
JPS5153243A	1976-05-11
JPS5720119A	1982-02-02

Attorney, Agent or Firm:

Tomimura Kiyoshi

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