TRANSFORMER-TYPE SENSOR OF ELECTRIC MOTOR PROTECTIVE RELAY

FIELD: electrical engineering; sensors of electrical equipment overcurrent protective gear. ^ SUBSTANCE: proposed transformer-type sensor of motor protective relay has field coil and multiturn toroidal measuring coil with inner bore. Both coils are placed inside ferromagnetic core that has butt-end...

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Bibliographische Detailangaben
Hauptverfasser:	MARKOV ALEKSANDR MIKHAJLOVICH, BELJAEV LEONID SERGEEVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS BASIC ELECTRIC ELEMENTS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION INDUCTANCES MAGNETS MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TARIFF METERING APPARATUS TESTING TRANSFORMERS
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Beschreibung
Zusammenfassung:	FIELD: electrical engineering; sensors of electrical equipment overcurrent protective gear. ^ SUBSTANCE: proposed transformer-type sensor of motor protective relay has field coil and multiturn toroidal measuring coil with inner bore. Both coils are placed inside ferromagnetic core that has butt-end wall and two side walls. This sensor is characterized in that its field coil is made in the form of phase conductor and pressed to butt-end wall of core that carries multiturn coil installed on ferromagnetic axle perpendicular to phase conductor. This axle is threaded on ends and passed through slits in side walls of core whereon it is locked in position with aid of threaded fastening members. Ferromagnetic core can be made in the form of U-shaped strip. ^ EFFECT: enhanced reliability of sensor attachment to phase conductor without injuring the latter. ^ 7 cl, 5 dwg