Circuit Interrupter Waveform Generator for Self-Testing
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Solution Overview
Problem
Existing circuit interrupter testing methods require specialized and costly external test devices to mimic sensor signals, increasing the cost of testing and room for improvement in testing systems.
Innovation Solution
A circuit interrupter with a waveform generator that can produce waveforms equivalent to sensor signals, allowing for testing without a specialized external device, using a control unit with a communication interface and signal processing circuit to process and output these waveforms, and utilizing common electronic devices for testing initiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external test device is used to test the circuit interrupter, then the testing capability is provided, but the testing cost increases
Solution Approach 1:
The circuit interrupter tests itself by using its own waveform generator to generate test waveforms that simulate sensor signals, eliminating the need for external specialized test devices and reducing testing costs while maintaining testing capability
Solution Approach 2:
The waveform generator serves dual purposes: it generates waveforms during normal operation and generates test waveforms during testing, allowing the same component to perform multiple functions and eliminating the need for separate dedicated test equipment
2Measurement precision
If a specialized external test device is used, then accurate sensor signal simulation is achieved, but device complexity increases
Solution Approach 1:
The circuit interrupter uses its own waveform generator to create test signals, eliminating the need for external specialized test devices and simplifying the overall testing system while maintaining accurate sensor signal simulation
Solution Approach 2:
The testing functionality is merged with the existing waveform generator and control unit, combining the test signal generation capability with the operational waveform generation, thereby reducing the number of separate components and simplifying the system
Data Source
AI summary
A circuit interrupter includes a sensor structured to output a sensor signal, a control unit structured to receive an external control signal, the control unit including: a communication interface structured to receive the external control signal, and a waveform generator structured to generate a waveform equivalent to the sensor signal in response to the external control, and a signal processing circuit structured to receive and process the sensor signal or the generated waveform and to output the processed sensor signal or generated waveform to the control unit.