Phase sequence indicating and alarming device of three-phase power supply

The utility model relates to a phase sequence indicating and alarming device of a three-phase power supply. The phase sequence indicating and alarming device comprises a piezoresistor R1, a piezoresistor R2, a capacitor C1, a capacitor C2, a light-emitting diode V1, a diode V2, a zener diode V3, a s...

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Bibliographische Detailangaben
Hauptverfasser:	LV MEILEI, WANG HAILUN, YE HONG, YE WENTONG, HUANG YUNLONG, GU NENGHUA
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALARM SYSTEMS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS
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Beschreibung
Zusammenfassung:	The utility model relates to a phase sequence indicating and alarming device of a three-phase power supply. The phase sequence indicating and alarming device comprises a piezoresistor R1, a piezoresistor R2, a capacitor C1, a capacitor C2, a light-emitting diode V1, a diode V2, a zener diode V3, a strobe diode V4 and a bridge rectifier VC, and the phase sequence indicating and alarming device is characterized in that the capacitor C1 is A phase load alone, the light-emitting diode V1 and the diode V2 are reversely connected in parallel, and then are connected with the piezoresistor R1 in series to form B phase load, the piezoresistor R2 and an alternating current input end of the bridge rectifier VC are connected in series to form C phase load, and the capacitor C2, the zener diode V3 and the bridge diode V4 are connected in parallel at the direct current output end of the bridge rectifier VC. The phase sequence indicating and alarming device of a three-phase power supply has simple structure and low cost.