Insulating Housing Cross-Module Installation Space
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Solution Overview
Problem
The assembly of multi-pole residual current circuit breakers is complex due to the need to manually thread thick primary conductors through a ring-shaped magnetic core, especially in compact devices with limited installation space.
Innovation Solution
An insulating material housing with a narrow design, divided into two functional areas, allows for a cross-module installation space that accommodates a summation current transformer, enabling components to be installed without opening the housing and reducing assembly complexity by routing primary conductors outside the housing before installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If compact miniature circuit breakers with housing width of one pitch unit are used, then space utilization is improved, but assembly complexity increases due to limited installation space for threading primary conductors through the magnetic core
Solution Approach 1:
The patent introduces a push-in opening through the broad side of the housing, creating a new access dimension for installing the summation current transformer. This allows components to be installed from the side rather than requiring access through the limited top space, effectively adding a dimensional pathway that bypasses the space constraints of the compact one-pitch-unit design.
Solution Approach 2:
The primary conductors are routed outside the housing before the summation current transformer is installed. This preliminary routing of conductors through external pathways eliminates the need to thread them through the magnetic core during assembly, simplifying the installation process while maintaining the compact housing dimensions.
2Reliability
If manual threading of thick primary conductors through ring-shaped magnetic core is required, then functional reliability is improved, but productivity decreases due to complex assembly process
Solution Approach 1:
The primary conductors are pre-routed outside the housing before the summation current transformer installation. This preliminary action separates the conductor routing step from the transformer installation, allowing conductors to be positioned in advance without requiring manual threading through the magnetic core, thereby improving assembly efficiency while maintaining proper electrical connections.
Solution Approach 2:
The patent extracts the conductor routing operation from the transformer installation process. By providing external routing pathways for primary conductors, the complex manual threading operation is separated and simplified, allowing the summation current transformer to be installed independently through the push-in opening without requiring simultaneous conductor manipulation.
3Adaptability or versatility
If cross-module functional assembly is installed in common installation space, then adaptability is improved, but device complexity increases due to housing structure requirements
Solution Approach 1:
The housing is segmented with a dedicated push-in opening that provides access to the common installation space formed by adjacent modules. This segmentation allows the summation current transformer to be installed independently in the cross-module space without requiring complex integrated housing structures, as the opening provides a straightforward access pathway.
Solution Approach 2:
The common installation space formed by the common broad side of adjacent housings serves multiple functions: it accommodates the summation current transformer for residual current detection, provides a pathway for primary conductor routing, and enables modular assembly. This multi-functional use of the shared space increases adaptability without proportionally increasing housing structure complexity.
Data Source
Figure 1~2
Figure 3~4
AI summary
The insulating housing (10) according to the invention for a modular, multi-pole low-voltage protective switching device (1) has a front side (11), a mounting side (12) arranged opposite the front side (11), and narrow and wide sides (13-1, 13-2, 14-1, 14-2) connecting the front side and the mounting side (11, 12). Furthermore, the insulating housing (10) has a first functional area (20) and a second functional area (30), which are arranged side by side with a width (B) of only one module and each extend from one narrow side (13-1, 13-2) to the opposite narrow side, wherein each of the two functional areas (20, 30) has a narrow and a wide sub-area (21, 31, 22, 32).Furthermore, the insulating housing (10) has a insertion opening (15) extending from one broad side (14-1, 14-2) to the other, forming an installation space (16) which, when combined with another insulating housing (10'), serves as a multi-module installation space (16, 16') for accommodating a multi-module functional assembly. Large components of the low-voltage protective switching device (1) can be easily retrofitted via the insertion opening (15) without having to open the insulating housing (10).