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In a switch with pre-alarm means (101) having pre-alarming apparatus (20, 21) and an indicator (103) for alarming that value of current flowing on a load is above a predetermined alarming level, output of the pre-alarming apparatus is held at a predetermined level after the value of the current once...

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Bibliographische Detailangaben
Hauptverfasser:	ISHII, KAZUHIRO C/ FUKUYAMA SEISAKUSHO, 1-8, MIDORIMACHI FUKUYAMA-SHI, 720, JP, KIMURA, KENZI C/ FUKUYAMA SEISAKUSHO, 1-8, MIDORIMACHI FUKUYAMA-SHI, 720, JP
Format:	Patent
Sprache:	ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS EMERGENCY PROTECTIVE DEVICES GENERATION RELAYS SELECTORS
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Beschreibung
Zusammenfassung:	In a switch with pre-alarm means (101) having pre-alarming apparatus (20, 21) and an indicator (103) for alarming that value of current flowing on a load is above a predetermined alarming level, output of the pre-alarming apparatus is held at a predetermined level after the value of the current once becomes above the alarming level by self-holding function of thyristor (CR) even when the value of the current becomes below the alarming level after that.