Field Configurable Rating Plug for Circuit Breakers
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Solution Overview
Problem
Existing circuit breaker apparatuses have fixed factory-set rating plugs that cannot be conveniently modified in the field, leading to potential intermittent switch positions and unintended protection settings when operational parameters need to be changed, which can result in nuisance trips or incorrect protection settings.
Innovation Solution
A circuit breaker apparatus with a rating plug that can operate in multiple modes in response to control signals, allowing for on-site configuration or reconfiguration, eliminating the need for physical replacement of factory-set plugs and reducing the risk of intermittent switch positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If factory-set rating plugs are used with fixed configurations, then manufacturing precision and initial reliability are improved, but adaptability and ease of operation deteriorate when field modifications are needed
Solution Approach 1:
The rating plug transitions from a static, factory-fixed configuration to a dynamic, field-reconfigurable system. The electronic component receives control signals that dynamically change the operational parameters (trip current settings, time delays) without physical replacement, allowing the system to adapt to different operational requirements while maintaining reliable operation.
Solution Approach 2:
The patent replaces the mechanical switch system with an electronic control system. Instead of physically manipulating switches on the rating plug, the system uses electronic control signals transmitted to an electronic component that adjusts the operational parameters, eliminating mechanical wear and intermittent switch positions while maintaining adaptability.
2Ease of operation
If manual switch manipulation is used for field modifications, then ease of operation is improved for simple changes, but reliability deteriorates due to intermittent switch positions and unintended settings
Solution Approach 1:
The patent replaces manual mechanical switch manipulation with an electronic control system. Control signals are transmitted to an electronic component that precisely adjusts operational parameters without the risk of intermittent switch positions or unintended settings. This eliminates the reliability issues associated with mechanical switches while maintaining ease of operation through simplified control interfaces.
Solution Approach 2:
The system enables self-service configuration through electronic control signals that can be transmitted remotely or through simplified interfaces. The electronic component automatically adjusts the rating plug parameters based on received signals, eliminating the need for operators to physically manipulate multiple switches and reducing human error in setting configuration.
3Manufacturing precision
If factory-set rating plugs are used, then manufacturing precision is improved, but loss of time increases when parameter changes are needed
Solution Approach 1:
The rating plug system transitions from static factory settings to dynamic field-reconfigurable settings. The electronic component allows operational parameters to be changed in real-time through control signals, eliminating the time-consuming process of physical rating plug replacement while maintaining the precision of factory-initialization through electronic configuration storage.
Solution Approach 2:
The patent replaces the mechanical rating plug replacement process with an electronic reconfiguration system. Instead of physically removing and replacing rating plugs (which takes time), the system uses electronic control signals to instantly change operational parameters, dramatically reducing reconfiguration time while maintaining manufacturing precision through electronic parameter storage and retrieval.
4Adaptability or versatility
If multiple mechanical switches are provided on rating plugs, then adaptability is improved for field modifications, but device complexity and reliability worsen due to increased points of failure
Solution Approach 1:
The patent replaces multiple mechanical switches with a single electronic control interface. The electronic component receives control signals and internally manages the complexity of multiple parameters, presenting a simplified interface to the operator while maintaining full adaptability. This eliminates the mechanical complexity and associated failure points of multiple switches while preserving field configurability.
Solution Approach 2:
The electronic control system serves multiple functions that were previously requiring multiple separate mechanical switches. A single electronic component can manage trip current settings, time delays, and other operational parameters through unified control, reducing device complexity while maintaining or enhancing adaptability through programmable multi-functionality.
Data Source
AI summary
A circuit breaker apparatus is provided and includes a trip mechanism which is coupled to an electrical circuit and which is configured to interrupt an operation of the electrical circuit when the trip mechanism is actuated, an electronic trip unit in signal communication with and configured to actuate the trip mechanism when pre-selected conditions are satisfied, and a rating plug coupled to the electronic trip unit and configured to operate in a first mode in response to a receipt of a transmitted control signal at the rating plug, and to otherwise operate in a second mode, the first and second modes being respectively associated with first and second ones of the pre-selected conditions to be correspondingly transmitted to the electronic trip unit by which the electronic trip unit determines whether to actuate the trip mechanism.