THREE PHASE MAIN CIRCUIT TESTING APPARATUS

PURPOSE: To prevent the error of a tester in the phase sequence check of three phases of R, S and T of a main circuit cable having three phases and to effectively test it. CONSTITUTION: The three phase main circuit testing apparatus comprises a main circuit cable 11 having three phases, a power supp...

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Bibliographische Detailangaben
1. Verfasser:	TERAO NAOYASU
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
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Beschreibung
Zusammenfassung:	PURPOSE: To prevent the error of a tester in the phase sequence check of three phases of R, S and T of a main circuit cable having three phases and to effectively test it. CONSTITUTION: The three phase main circuit testing apparatus comprises a main circuit cable 11 having three phases, a power supply unit 12 for applying two of the three phases by switching applying switches 20, 21 connected to one end of the cable 11, and a polarity validating unit 13 connected to the other end of the cable 11 and having a voltage detector 27 for detecting the two phases applied by a voltage switching unit 28, wherein the phase sequence of the cable 11 can be checked.