Trip Deck Switch Support for Space-Constrained Circuit Interrupters
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Solution Overview
Problem
Existing circuit interrupters face space constraints for instrumentation, limiting the integration of redundant devices and efficient interaction with crossbars and trip bars, which affects their functionality and reliability.
Innovation Solution
A multi-pole circuit interrupter design featuring an improved trip deck assembly with a support system that holds switches in place, allowing for easy installation of accessory devices like auxiliary switches, which interact with the crossbar and trip bar, and includes a platform-mounted switch apparatus with a plunger mechanism to detect the circuit's state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If more instrumentation is added to the circuit interrupter, then the functionality and reliability are improved, but the space constraints are exceeded
Solution Approach 1:
The switch housing is nested within the support structure, with the plunger mechanism housed inside the switch housing. This nested arrangement allows multiple components to occupy overlapping spatial volumes, enabling redundant instrumentation to be integrated without increasing the overall footprint of the circuit interrupter.
Solution Approach 2:
The support utilizes the depth dimension of the circuit interrupter by extending from the crossbar toward the interior, effectively using the Z-axis space rather than only the horizontal plane. This dimensional approach allows instrumentation to be arranged in three-dimensional space, maximizing the use of available volume while maintaining compact外形 dimensions.
2Reliability
If switches are added to interact with crossbar and trip bar, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The support structure serves multiple functions simultaneously: it holds the switch in a fixed position, provides a mounting platform for the switch housing, and positions the plunger to interact with both the crossbar and trip bar. This multi-functionality reduces the need for separate components for each function, thereby improving reliability without proportionally increasing complexity.
Solution Approach 2:
The support and retainer are combined into a single integrated component that performs both switching functions. By merging these elements, the patent reduces the number of separate parts and assembly steps while ensuring reliable interaction with both the crossbar and trip bar through the unified structure.
3Ease of operation
If switches are made easily installable in the field, then the ease of operation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The switch assembly is segmented into modular components: the support (with integrated retainer), the switch housing, and the plunger mechanism. This segmentation allows the switch to be pre-assembled and tested as a unit, then easily installed in the field by simply mounting the complete assembly onto the circuit interrupter frame, thereby improving ease of installation.
Solution Approach 2:
The support is designed with pre-formed engagement features (protrusions and recesses) that align with corresponding features on the frame during installation. This preliminary design of alignment features ensures that field installation requires minimal adjustment while maintaining precise positioning, thus improving ease of operation without compromising manufacturing precision.
Data Source
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AI summary
An improved multi-pole circuit interrupter includes an improved trip deck assembly adjacent one pole and further includes an accessory deck adjacent another pole. The accessory deck includes conventional accessory devices such as an auxiliary switch, etc., and the trip deck assembly includes switches and one or more other devices that can interact with a crossbar and a trip bar of the circuit interrupter. Such switches can be easily installed by a technician in the field after manufacture of the circuit interrupter. One switch is held in place by a support, and the other switch is held in place by a retainer, with the support and the retainer holding the switches in a fixed position on the trip deck assembly in order to interact with the crossbar and the trip bar.