Universal Trip Unit Adapting to Circuit Breaker Personality Modules
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Solution Overview
Problem
The existing circuit breaker technologies require operators to stock large numbers of spare trip units due to the variability of circuit breaker types, leading to high costs and space occupancy.
Innovation Solution
A universal trip unit is designed with a power supply, communication unit, and controller that can receive key breaker personality parameters, allowing it to be adaptable to various circuit breakers by reading and storing operational information from a personality module, enabling it to execute trip protection based on predetermined thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If operators stock large numbers of spare trip units for different circuit breaker types, then the reliability of circuit breaker operation is improved, but the cost and space occupancy increase
Solution Approach 1:
The trip unit is designed with a universal architecture that can perform multiple functions across different circuit breaker types. The controller is configured to communicate with various personality modules through standardized interfaces, allowing a single trip unit design to serve multiple circuit breaker applications without requiring type-specific hardware variants.
Solution Approach 2:
The system accommodates different circuit breaker types by changing software parameters and configuration data rather than hardware architecture. The controller reads personality parameters from the personality module and adjusts its operation accordingly, allowing the same physical trip unit to adapt to different circuit breaker specifications through parameter modification.
2Quantity of substance
If a universal trip unit design is implemented, then the quantity of spare units needed is reduced, but the device complexity increases
Solution Approach 1:
The trip unit architecture is segmented into distinct functional modules: a universal controller, a personality module containing type-specific data, and a communication interface. This segmentation allows the complex adaptation logic to be isolated in the personality module while the main controller remains relatively simple and reusable across different circuit breaker types.
Solution Approach 2:
The personality module acts as an intermediary between the universal controller and the diverse circuit breaker types. It contains the specific parameters and communication protocols for different breaker types, translating between the universal controller and various breaker personalities without requiring the controller itself to be complex or type-specific.
Data Source
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AI summary
A universal trip unit (10) for use with a circuit breaker apparatus (1) is provided and includes a communication unit (40) configured to communicate with a personality module (3) of the circuit breaker apparatus and to thereby receive key breaker personality parameters (P2) that relate to operational characteristics of the circuit breaker apparatus, and a controller. The controller (50) includes a memory (60) on which a universal register (R), previously stored key parameters (P1) and the received key breaker personality parameters (P2) are stored, the controller being configured to control the communication unit (40) to receive the key breaker personality parameters (P2) in accordance with information determined from the universal register (R), and components to execute trip protection when at least one of a current and a voltage within the circuit breaker apparatus exceeds a respective predetermined threshold as defined by the previously stored key parameters (P1) and the received key breaker personality parameters (P2).