CONTROLLER FOR AIR CONDITIONER

PROBLEM TO BE SOLVED: To achieve the protection of a three-phase/four-wire AC power supply during phase interruption by an inexpensive configuration. SOLUTION: A control circuit means 2 is provided at a neutral power supply wire 9n and an R-phase power supply wire 9r in the three-phase/four-wire AC...

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Bibliographische Detailangaben
1. Verfasser:	MORISHIGE ARIKICHI
Format:	Patent
Sprache:	eng
Schlagworte:	AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING BLASTING CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION HEATING LIGHTING MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MECHANICAL ENGINEERING PHYSICS RANGES TESTING VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To achieve the protection of a three-phase/four-wire AC power supply during phase interruption by an inexpensive configuration. SOLUTION: A control circuit means 2 is provided at a neutral power supply wire 9n and an R-phase power supply wire 9r in the three-phase/four-wire AC power supply. A low-resistance element 3 and a voltage detection means 4a are provided in series at an S-phase power supply wire 9s. An exciting coil of a second three-phase power supply opening/closing means 11 is connected to a T-phase power supply wire 9t and a neutral power supply wire 9n via an opening/closing part of a first three-phase power supply opening/closing means 10. An opening/closing part of the second three-phase power supply opening/closing means 11 is opened at least by the three-phase/four-wire power supply wire even if any phase is interrupted. COPYRIGHT: (C)2008,JPO&INPIT