Fuse Element Structure With Wall-Integrated Current Sensing
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Solution Overview
Problem
Existing fuses lack integrated measurement capabilities, making it difficult to determine the state of an electrical installation in real-time and independently of location, especially in retrofit applications where limited installation space is a constraint.
Innovation Solution
A fuse body with a first reception space for the fuse element and a second reception space for a measurement device, which includes a transformer and electronics assembly, allowing for direct current detection and wireless data transmission without additional installation space, using a compact design that maintains the dimensions of a conventional NH fuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fuse with integrated measurement function is implemented, then measurement capability and real-time monitoring are improved, but device complexity increases
Solution Approach 1:
The patent combines the measurement device (transformer and electronics assembly) with the fuse body into a single integrated unit. The measurement device is received within the fuse body structure, merging protection and measurement functions into one component, thereby improving measurement capability while managing device complexity through functional integration.
Solution Approach 2:
The fuse body is designed to serve multiple functions: it provides overcurrent protection through the fuse element and simultaneously houses the measurement device for current monitoring and data transmission. This multi-functionality allows the single component to deliver both protection and measurement capabilities.
2Area of stationary object
If measurement device is integrated into fuse body, then installation space requirement is reduced, but manufacturing complexity increases
Solution Approach 1:
The measurement device is nested within the fuse body structure. The transformer and electronics assembly are received inside the fuse body, with the measurement device fitting within the available internal space. This nesting arrangement reduces the overall installation footprint while managing manufacturing complexity through structured integration.
Solution Approach 2:
The patent utilizes the radial dimension of the fuse body by forming the second reception space in a wall section of the fuse body. This dimensional approach allows the measurement device to be integrated without significantly increasing the longitudinal dimensions, thereby reducing installation space requirements while managing manufacturing complexity.
3Adaptability or versatility
If compact design maintaining conventional NH fuse dimensions is used, then adaptability to existing installations is improved, but internal space for measurement device is limited
Solution Approach 1:
The fuse body maintains the external dimensions of a conventional NH fuse for compatibility with existing installations. The second reception space for the measurement device is formed in a wall section, utilizing local internal space efficiently. This local quality approach preserves adaptability while accommodating the measurement device within constrained internal volume.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables real-time monitoring of the fuse and electrical system state without requiring external power or additional installation space, enhancing reliability and usability in retrofit applications.
Implementation Method 1
The measurement device has a transformer and an electronics assembly
Implementation Method 2
The fuse element, which has a reduced cross section in comparison with the rest of the conductors in the circuit, is heated by the current flowing through it and melts when the critical nominal current of the fuse is significantly exceeded
Implementation Method 3
this electric current has to be promptly disconnected. This is ensured using what are known as overcurrent protection apparatuses. One example of such an overcurrent protection apparatus is, for example, a fuse that interrupts the circuit through the melting of one or more fuse elements
Data Source
AI summary
A fuse element for a fuse with an integrated measurement function, includes a first receiving area in an embodiment, for receiving a melting conductor of the fuse, delimited in the length direction of the fuse by a closure element and in a direction orthogonal to the length direction by the fuse element. Further, in an embodiment, the fuse element has a second receiving area, physically separated from the first receiving area, for receiving a measuring device of the fuse. The second receiving area is designed to receive the measuring device in a wall section of the fuse element. The second receiving area formed in the fuse element protects the measuring device arranged therein against interfering environmental influences. The measuring device is used to ascertain the electric current flowing through the fuse directly on the fuse.