Apparatus for interfacing a three phase power supply to a load

Details Apparatus for interfacing a three phase power supply to a load Apparatus for interfacing a three phase power supply to a load

2006-11-09

2009-12-15

Paladini, Albert W (Department: 2836)

Electrical transmission or interconnection systems

Switching systems

Condition responsive

C324S076770

Reexamination Certificate

active

07633185

ABSTRACT:
An apparatus monitors and controls application of three phases of alternating voltage to a load by detecting the sequence of the three phases. A switch module is operated, in response to the detected sequence, to ensure that the three phases are properly applied to the load, even if the utility lines are improperly connected. The monitoring also senses loss of a phase in which case the switch module disconnects the application of electricity to the load. The apparatus is capable of being used with different loads that operate at different peak to peak levels of alternating voltage.

REFERENCES:
patent: 2724782 (1955-11-01), Holloway
patent: 3825768 (1974-07-01), Grygera
patent: 3976919 (1976-08-01), Vandevier et al.
patent: 4021704 (1977-05-01), Norbeck
patent: 4617534 (1986-10-01), Lill
patent: 4926131 (1990-05-01), Leydier
patent: 5748463 (1998-05-01), Tsutsui et al.
patent: 6541954 (2003-04-01), Gluszek
patent: 7208955 (2007-04-01), Zansky et al.

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