Circuit Breaker Enclosure Pass-Through for Insulating Medium Heating
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Solution Overview
Problem
Existing circuit breaker enclosures face challenges in maintaining the temperature of insulating mediums, leading to potential liquefaction or ineffective operation, and existing heating solutions can create sealing breaches and require burdensome maintenance due to suspended configurations.
Innovation Solution
An integrated pass-through feature within the enclosure that securely houses a heating element and sensor, allowing for efficient thermal interaction and temperature control, while minimizing the risk of sealing breaches and facilitating maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heating element is attached directly to the enclosure end with suspended configuration, then thermal efficiency is improved, but sealing integrity deteriorates and maintenance complexity increases
Solution Approach 1:
The heating element is integrated into the enclosure wall structure itself, merging the heating function with the enclosure structure. This eliminates separate attachment points that could compromise sealing, while maintaining thermal efficiency through direct wall-mounted positioning.
Solution Approach 2:
The enclosure wall acts as an intermediary structure that houses the heating element within its thickness. This intermediate positioning allows thermal interaction with the insulating medium while preserving the external sealing integrity of the enclosure.
2Temperature
If a heating element is attached directly to the enclosure end with suspended configuration, then thermal efficiency is improved, but maintenance difficulty increases
Solution Approach 1:
The heating element is designed as a separable component integrated into the wall structure, allowing it to be removed and replaced independently without dismantling the entire enclosure. This segmentation enables easy maintenance while maintaining thermal efficiency during operation.
Solution Approach 2:
The heating element is pre-positioned within the wall structure during manufacturing, but designed with preliminary consideration for maintenance access. This allows routine maintenance without burdensome disassembly, as the element can be accessed through predetermined service openings or removable wall sections.
3Reliability
If heating element is integrated into enclosure wall, then sealing integrity is maintained, but device complexity increases
Solution Approach 1:
The enclosure wall serves multiple functions: structural containment, thermal management interface, and heating element housing. This multi-functionality integrates the heating system into the existing wall structure without requiring separate complex mounting apparatus, thereby maintaining sealing integrity while avoiding excessive complexity.
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
The integrated pass-through feature enhances thermal efficiency, maintains the integrity of the enclosure's seal, and simplifies maintenance by providing direct access and integration of heating elements and sensors, ensuring effective operation of the insulating medium.
Implementation Method 1
The radiator is thermally coupled to the heater via the wall. The heating system is constructed to conduct heat from the heater through the wall to the radiator.
Implementation Method 2
The radiator is constructed to radiate the heat to the SF6 in the tank.
Implementation Method 3
The dielectric insulating medium within the sealed enclosure can be used in at least an attempt to reduce and/or quench arcing, as well as prevent the flow of electrical current from electrically active parts and at least the enclosure
Implementation Method 4
such arcing can be associated with the displacement within a circuit breaker of a moveable contact relative to a stationary contact of a circuit interrupter
Data Source
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AI summary
An enclosure of a circuit breaker that includes an interior region and a pass-through. The interior region can be sized to house a circuit interrupter and a dielectric insulating medium. The pass-through can include a pathway having a first open end and a second open end, the first and second open ends being in direct fluid communication with each other through the pathway. The first and second open ends can be secured to the enclosure such that the pass-through is integral to the enclosure, such as, for example, being part of a monolithic structure or constructed to form a unitary body. Additionally, the pathway may not be in direct fluid communication with the interior region of the enclosure. Further, the pass-through can be offset from, or extend directly into, the interior region of the enclosure.