Display transducer apparatus
First Claim
Patent Images
1. An apparatus for connection to a digital protective relay connected to a power system, comprising:
- means for providing digital communication between the relay and the apparatus;
means for obtaining power system information in digitized format from the relay;
means for selectively displaying at least some of the power system information obtained from the relay wherein the power system information includes fault location information and said obtaining means provides for storing information for a plurality of discrete faults which fault information may be displayed by said displaying means;
means for selectively converting the digitized information into at least one analog signal and providing an output for said signal, the information represented by said signal being preferentially selectably by a user of the apparatus; and
serial communication means for communicating with the relay so the apparatus may be located near or at a distance from the relay.
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Abstract
A display transducer adapter for obtaining and displaying power system information from a protective relay. The information includes watt, voltage, current, reactive power, and fault location information. The information may be converted from a digitized format into analog signals and those signals may be provided as outputs, the functions of which are user selectable. The user may also selectively scale the outputs to cover a specified range.
112 Citations
16 Claims
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1. An apparatus for connection to a digital protective relay connected to a power system, comprising:
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means for providing digital communication between the relay and the apparatus; means for obtaining power system information in digitized format from the relay; means for selectively displaying at least some of the power system information obtained from the relay wherein the power system information includes fault location information and said obtaining means provides for storing information for a plurality of discrete faults which fault information may be displayed by said displaying means; means for selectively converting the digitized information into at least one analog signal and providing an output for said signal, the information represented by said signal being preferentially selectably by a user of the apparatus; and serial communication means for communicating with the relay so the apparatus may be located near or at a distance from the relay. - View Dependent Claims (2, 3)
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4. An apparatus for connection to a digital protective relay connected to a power system, comprising:
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means for providing digital communication between the relay and the apparatus; means for obtaining power system information in digitized format from the relay; means for selectively converting the digitized information into at least one analog signal and providing an output for said signal; relay contact outputs for signaling fault type; and means for interfacing the apparatus with control equipment for the power system whereby signals from said analog output and said relay contact outputs are provided to said control equipment to control the operation of the power system. - View Dependent Claims (5, 6, 7)
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8. An apparatus for connection to a protective relay, comprising:
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means for providing digital communication between the relay and the apparatus; means for obtaining watt, voltage, current, reactive power, and fault location information in digitized format from the relay; means for selectively displaying at least some of the information obtained from the relay; means for converting the digitized information into analog signals and providing an output for said signals wherein the information represented by said signals is selectable; means for selectively scaling said signals to cover a specified range; serial communication means for communicating with the relay so the apparatus may be located near or at a distance from the relay; relay contact outputs for signaling fault type; and isolator input means for controlling at least one analog output and said relay contact outputs. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification