Apparatus for indicating phase sequence
Abstract
Abstract AN ELECTRICAL APPARATUS IN THE FORM OF AN ELECTRICAL INSTRUMENT FOR IDENTIFYING AND INDICATING PHASE SEQUENCE OF A THREE PHASE SYSTEM HAVING SUBSTANTIALLY EQUAL PHASETO-PHASE VOLTAGES AT 120* SPACE RELATION TO EACH OTHER, THE INSTRUMENT COMPRISING A DIRECT CURRENT METER WITH A ZERO CENTER SCALE TO REGISTER CURRENT FLOW IN EITHER DIRECTION THERETHROUGH, AND A VOLTAGE DIVIDING ELECTRICAL CIRCUIT HAVING A PHASE SHIFTING PORTION AND A RECTIFYING PORTION WITH SAID METER CONNECTED THEREBETWEEN, WHEREIN WHEN THE CIRCUIT IS SELECTIVELY CONNECTED TO THE THREE PHASE SYSTEM THE METER WILL DEFLECT IN A PREDETERMINED DIRECTION TO INDICATE PHASE SEQUENCE OF THE SYSTEM, AND WHERE ONE PHASE CAN BE IDENTIFIED THE INSTRUMENT IS OPERATIVE TO IDENTIFY THAT PHASE AND THERINAFTER IDENTIFY THE REMAINING PHASES OF THE SYSTEM.
Inventors
- 👤 Benedict S Mitchell Sr
Bibliographic Details
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