CONTROLLER FOR AIR CONDITIONER

PROBLEM TO BE SOLVED: To provide a protection means for a three-phase four-wire alternating-current power source at the time of phase interruption through a low-cost construction. SOLUTION: The neutral point power line 9n and the phase-R power line 9r of a three-phase four-wire alternating-current p...

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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 COMBINED HEATING AND REFRIGERATION SYSTEMS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING RANGES REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a protection means for a three-phase four-wire alternating-current power source at the time of phase interruption through a low-cost construction. SOLUTION: The neutral point power line 9n and the phase-R power line 9r of a three-phase four-wire alternating-current power source is connected with a control circuit means 2. The phase-S power line 9s and the neutral point power line 9n are connected with an inverter control means 3. The phase-T power line 9t and the neutral point power line 9n are connected with the exciting coil portion of a second three-phase power supply switching means 11 through the switching portion of a first three-phase power supply switching means 10. Whichever phase is opened in at least three-phase four-wire power lines, the switching portion of the second three-phase power supply switching means 11 is caused to perform opening operation to interrupt power supply. COPYRIGHT: (C)2006,JPO&NCIPI