Bent Device-Protecting Cover for Arc Gas Shielding
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Solution Overview
Problem
Conventional unit apparatuses lack a partition structure between units, allowing arc gas from short-circuit faults to spread and increasing component count, assembly time, and costs due to the need for additional partition plates on the housing side, which also complicates changes in stacking and size.
Innovation Solution
A unit apparatus with a device-protecting cover formed by bending an upper or lower part to create a channel shape, combined with a unit frame body having a unit base that laps over the bent surface, forming a unit chamber and providing a partition function without the need for additional partition plates on the housing side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a partition plate is separately provided on the housing side to shield arc gas, then arc gas shielding is improved, but the number of components and assembly work time increase
Solution Approach 1:
The partition function is merged into the device-protecting cover by bending its upper or lower part to form a channel shape. This integration eliminates the need for separate partition plates on the housing side, reducing component count while maintaining arc gas shielding effectiveness between units
Solution Approach 2:
The device-protecting cover is designed to serve multiple functions: protecting the device and simultaneously providing partitioning between units through its bent channel shape. This multi-functionality resolves the contradiction by making one component perform both protection and partitioning roles
2Reliability
If a partition plate is separately provided on the housing side to shield arc gas, then arc gas shielding is improved, but assembly work time increases
Solution Approach 1:
The partition function is integrated into the device-protecting cover structure itself through bending, eliminating the need for separate partition plate installation steps. This reduces assembly work time while maintaining effective arc gas shielding
3Adaptability or versatility
If the unit size or stacking changes, then adaptability is improved, but repartition work and cost increase
Solution Approach 1:
The bent channel shape of the device-protecting cover is designed to be adaptable to different unit configurations. When unit size or stacking changes, the cover's geometry can be adjusted without requiring additional partition plates or complex repartitioning work, maintaining ease of manufacture
Data Source
AI summary
In a unit apparatus in which units each equipped with a device are disposed in multiple stages and are attached to a housing, the unit apparatus includes: a device-protecting cover which is disposed on the front surface side of the unit and is formed by bending an upper part or a lower part thereof to protect the device; and a unit frame body having a unit base which is disposed in lapped relation on one of the bent upper part surface or the bent lower part surface of the device-protecting cover. The device-protecting cover and the unit frame body constitute a unit chamber; and the units are disposed in multiple stages in said housing, whereby the other of the bent upper part surface or the bent lower part surface of said bent device-protecting cover is shielded.